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Bochs/bochs/cpu/arith16.cc

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- add RCS Id to header of every file. This makes it easier to know what's going on when someone sends in a modified file.
2001-10-03 17:10:38 +04:00
/////////////////////////////////////////////////////////////////////////
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
// $Id: arith16.cc,v 1.22 2002-09-30 02:02:06 kevinlawton Exp $
- add RCS Id to header of every file. This makes it easier to know what's going on when someone sends in a modified file.
2001-10-03 17:10:38 +04:00
/////////////////////////////////////////////////////////////////////////
//
- update copyright dates to 2001 for all mandrake headers - for bochs files with other header, replaced with current mandrake header
2001-04-10 06:20:02 +04:00
// Copyright (C) 2001 MandrakeSoft S.A.
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- parts of the SMP merge apparantly broke the debugger and this revision tries to fix it. The shortcuts to register names such as AX and DL are #defines in cpu/cpu.h, and they are defined in terms of BX_CPU_THIS_PTR. When BX_USE_CPU_SMF=1, this works fine. (This is what bochs used for a long time, and nobody used the SMF=0 mode at all.) To make SMP bochs work, I had to get SMF=0 mode working for the CPU so that there could be an array of cpus. When SMF=0 for the CPU, BX_CPU_THIS_PTR is defined to be "this->" which only works within methods of BX_CPU_C. Code outside of BX_CPU_C must reference BX_CPU(num) instead. - to try to enforce the correct use of AL/AX/DL/etc. shortcuts, they are now only #defined when "NEED_CPU_REG_SHORTCUTS" is #defined. This is only done in the cpu/*.cc code.
2001-05-24 22:46:34 +04:00
#define NEED_CPU_REG_SHORTCUTS 1
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
#include "bochs.h"
merge in BRANCH-io-cleanup. To see the commit logs for this use either cvsweb or cvs update -r BRANCH-io-cleanup and then 'cvs log' the various files. In general this provides a generic interface for logging. logfunctions:: is a class that is inherited by some classes, and also . allocated as a standalone global called 'genlog'. All logging uses . one of the ::info(), ::error(), ::ldebug(), ::panic() methods of this . class through 'BX_INFO(), BX_ERROR(), BX_DEBUG(), BX_PANIC()' macros . respectively. . . An example usage: . BX_INFO(("Hello, World!\n")); iofunctions:: is a class that is allocated once by default, and assigned as the iofunction of each logfunctions instance. It is this class that maintains the file descriptor and other output related code, at this point using vfprintf(). At some future point, someone may choose to write a gui 'console' for bochs to which messages would be redirected simply by assigning a different iofunction class to the various logfunctions objects. More cleanup is coming, but this works for now. If you want to see alot of debugging output, in main.cc, change onoff[LOGLEV_DEBUG]=0 to =1. Comments, bugs, flames, to me: todd@fries.net
2001-05-15 18:49:57 +04:00
#define LOG_THIS BX_CPU_THIS_PTR
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::INC_RX(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
Bit32u flags32;
asm (
"incw %1 \n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32), "=r" (BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].word.rx)
: "1" (BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].word.rx)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
Committed [english] patches from Jas Sandys-Lumsdaine. These were simply replacements of the eflags mask constants with the macro names already in cpu.h for asm() statements. I forgot to use the macros for some instructions. 0x000008d5 -> EFlagsOSZAPCMask 0x000008d4 -> EFlagsOSZAPMask
2002-09-28 05:16:09 +04:00
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPMask) | (flags32 & EFlagsOSZAPMask);
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
BX_CPU_THIS_PTR lf_flags_status &= 0x00000f;
#else
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Bit16u rx;
Modified the way that the register field (low 3 bits of a few opcodes also extended by the REX.B field on Hammer) is passed to instructions. I rearranged the bxInstruction_c to free up a field to be used to pass this info when mod-rm bytes are not used. This got rid of the ugly ((i->b1 & 7) + i->rex_b) code. Probably shaved just a very little run time off Hammer emulation, and even less on x86-32. The resultant is a little cleaner anyways.
2002-09-21 03:17:51 +04:00
rx = ++ BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].word.rx;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
SET_FLAGS_OSZAP_16(0, 0, rx, BX_INSTR_INC16);
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::DEC_RX(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
Bit32u flags32;
asm (
"decw %1 \n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32), "=r" (BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].word.rx)
: "1" (BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].word.rx)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
Committed [english] patches from Jas Sandys-Lumsdaine. These were simply replacements of the eflags mask constants with the macro names already in cpu.h for asm() statements. I forgot to use the macros for some instructions. 0x000008d5 -> EFlagsOSZAPCMask 0x000008d4 -> EFlagsOSZAPMask
2002-09-28 05:16:09 +04:00
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPMask) | (flags32 & EFlagsOSZAPMask);
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
BX_CPU_THIS_PTR lf_flags_status &= 0x00000f;
#else
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Bit16u rx;
Modified the way that the register field (low 3 bits of a few opcodes also extended by the REX.B field on Hammer) is passed to instructions. I rearranged the bxInstruction_c to free up a field to be used to pass this info when mod-rm bytes are not used. This got rid of the ugly ((i->b1 & 7) + i->rex_b) code. Probably shaved just a very little run time off Hammer emulation, and even less on x86-32. The resultant is a little cleaner anyways.
2002-09-21 03:17:51 +04:00
rx = -- BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].word.rx;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
SET_FLAGS_OSZAP_16(0, 0, rx, BX_INSTR_DEC16);
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::ADD_EwGw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op2_16, op1_16, sum_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
sum_16 = op1_16 + op2_16;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), sum_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
sum_16 = op1_16 + op2_16;
Write_RMW_virtual_word(sum_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_INSTR_ADD16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
BX_CPU_C::ADD_GwEEw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
Bit16u op1_16, op2_16, sum_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
op1_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
read_virtual_word(i->seg(), RMAddr(i), &op2_16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Bit32u flags32;
asm (
"addw %3, %1 \n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32), "=r" (sum_16)
: "1" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) | (flags32 & EFlagsOSZAPCMask);
BX_CPU_THIS_PTR lf_flags_status = 0;
#else
sum_16 = op1_16 + op2_16;
#endif
BX_WRITE_16BIT_REG(i->nnn(), sum_16);
#if !(defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_INSTR_ADD16);
#endif
}
void
BX_CPU_C::ADD_GwEGw(bxInstruction_c *i)
{
Bit16u op1_16, op2_16, sum_16;
op1_16 = BX_READ_16BIT_REG(i->nnn());
op2_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
Bit32u flags32;
asm (
"addw %3, %1 \n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32), "=r" (sum_16)
: "1" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) | (flags32 & EFlagsOSZAPCMask);
BX_CPU_THIS_PTR lf_flags_status = 0;
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
#else
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
sum_16 = op1_16 + op2_16;
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
BX_WRITE_16BIT_REG(i->nnn(), sum_16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if !(defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_INSTR_ADD16);
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::ADD_AXIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op1_16, op2_16, sum_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op1_16 = AX;
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
sum_16 = op1_16 + op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
AX = sum_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_INSTR_ADD16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::ADC_EwGw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
Bit16u op2_16, op1_16, sum_16;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
sum_16 = op1_16 + op2_16 + temp_CF;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), sum_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
sum_16 = op1_16 + op2_16 + temp_CF;
Write_RMW_virtual_word(sum_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, sum_16, BX_INSTR_ADC16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::ADC_GwEw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
Bit16u op1_16, op2_16, sum_16;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op1_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op2_16 = BX_READ_16BIT_REG(i->rm());
}
else {
read_virtual_word(i->seg(), RMAddr(i), &op2_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
sum_16 = op1_16 + op2_16 + temp_CF;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->nnn(), sum_16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, sum_16, BX_INSTR_ADC16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::ADC_AXIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
Bit16u op1_16, op2_16, sum_16;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op1_16 = AX;
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
sum_16 = op1_16 + op2_16 + temp_CF;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
AX = sum_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, sum_16, BX_INSTR_ADC16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SBB_EwGw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
Bit16u op2_16, op1_16, diff_16;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
diff_16 = op1_16 - (op2_16 + temp_CF);
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), diff_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
diff_16 = op1_16 - (op2_16 + temp_CF);
Write_RMW_virtual_word(diff_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, diff_16, BX_INSTR_SBB16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SBB_GwEw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op1_16, op2_16, diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op1_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op2_16 = BX_READ_16BIT_REG(i->rm());
}
else {
read_virtual_word(i->seg(), RMAddr(i), &op2_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
diff_16 = op1_16 - (op2_16 + temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->nnn(), diff_16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, diff_16, BX_INSTR_SBB16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SBB_AXIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
Bit16u op1_16, op2_16, diff_16;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op1_16 = AX;
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
diff_16 = op1_16 - (op2_16 + temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
AX = diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, diff_16, BX_INSTR_SBB16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SBB_EwIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
Bit16u op2_16, op1_16, diff_16;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
diff_16 = op1_16 - (op2_16 + temp_CF);
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), diff_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
diff_16 = op1_16 - (op2_16 + temp_CF);
Write_RMW_virtual_word(diff_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, diff_16, BX_INSTR_SBB16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SUB_EwGw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op2_16, op1_16, diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
diff_16 = op1_16 - op2_16;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), diff_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
diff_16 = op1_16 - op2_16;
Write_RMW_virtual_word(diff_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_SUB16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SUB_GwEw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op1_16, op2_16, diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op1_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op2_16 = BX_READ_16BIT_REG(i->rm());
}
else {
read_virtual_word(i->seg(), RMAddr(i), &op2_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
diff_16 = op1_16 - op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->nnn(), diff_16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_SUB16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SUB_AXIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op1_16, op2_16, diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op1_16 = AX;
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
diff_16 = op1_16 - op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
AX = diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_SUB16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::CMP_EwGw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit16u op2_16, op1_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
op2_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
}
else {
read_virtual_word(i->seg(), RMAddr(i), &op1_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit32u flags32;
asm (
"cmpw %2, %1\n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32)
: "r" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
Committed [english] patches from Jas Sandys-Lumsdaine. These were simply replacements of the eflags mask constants with the macro names already in cpu.h for asm() statements. I forgot to use the macros for some instructions. 0x000008d5 -> EFlagsOSZAPCMask 0x000008d4 -> EFlagsOSZAPMask
2002-09-28 05:16:09 +04:00
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) | (flags32 & EFlagsOSZAPCMask);
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
BX_CPU_THIS_PTR lf_flags_status = 0;
#else
Bit16u diff_16;
diff_16 = op1_16 - op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_CMP16);
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::CMP_GwEw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit16u op1_16, op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
op1_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
if (i->modC0()) {
op2_16 = BX_READ_16BIT_REG(i->rm());
}
else {
read_virtual_word(i->seg(), RMAddr(i), &op2_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit32u flags32;
asm (
"cmpw %2, %1\n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32)
: "r" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
Committed [english] patches from Jas Sandys-Lumsdaine. These were simply replacements of the eflags mask constants with the macro names already in cpu.h for asm() statements. I forgot to use the macros for some instructions. 0x000008d5 -> EFlagsOSZAPCMask 0x000008d4 -> EFlagsOSZAPMask
2002-09-28 05:16:09 +04:00
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) | (flags32 & EFlagsOSZAPCMask);
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
BX_CPU_THIS_PTR lf_flags_status = 0;
#else
Bit16u diff_16;
diff_16 = op1_16 - op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_CMP16);
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::CMP_AXIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit16u op1_16, op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
op1_16 = AX;
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit32u flags32;
asm (
"cmpw %2, %1\n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32)
: "r" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
Committed [english] patches from Jas Sandys-Lumsdaine. These were simply replacements of the eflags mask constants with the macro names already in cpu.h for asm() statements. I forgot to use the macros for some instructions. 0x000008d5 -> EFlagsOSZAPCMask 0x000008d4 -> EFlagsOSZAPMask
2002-09-28 05:16:09 +04:00
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) | (flags32 & EFlagsOSZAPCMask);
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
BX_CPU_THIS_PTR lf_flags_status = 0;
#else
Bit16u diff_16;
diff_16 = op1_16 - op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_CMP16);
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::CBW(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
/* CBW: no flags are effected */
AX = (Bit8s) AL;
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::CWD(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
/* CWD: no flags are affected */
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (AX & 0x8000) {
DX = 0xFFFF;
}
else {
DX = 0x0000;
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::XADD_EwGw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
#if (BX_CPU_LEVEL >= 4) || (BX_CPU_LEVEL_HACKED >= 4)
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op2_16, op1_16, sum_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
/* XADD dst(r/m), src(r)
* temp <-- src + dst | sum = op2 + op1
* src <-- dst | op2 = op1
* dst <-- tmp | op1 = sum
*/
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
sum_16 = op1_16 + op2_16;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
// and write destination into source
// Note: if both op1 & op2 are registers, the last one written
// should be the sum, as op1 & op2 may be the same register.
// For example: XADD AL, AL
BX_WRITE_16BIT_REG(i->nnn(), op1_16);
BX_WRITE_16BIT_REG(i->rm(), sum_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
sum_16 = op1_16 + op2_16;
Write_RMW_virtual_word(sum_16);
/* and write destination into source */
BX_WRITE_16BIT_REG(i->nnn(), op1_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_INSTR_XADD16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
#else
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
2001-05-30 22:56:02 +04:00
BX_PANIC(("XADD_EvGv: not supported on < 80486"));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
#endif
}
void
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
BX_CPU_C::ADD_EEwIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
I rehashed the way the EFLAGS register was stored internally. All the EFLAGS bits used to be cached in separate fields. I left a few of them in separate fields for now - might remove them at some point also. When the arithmetic fields are known (ie they're not in lazy mode), they are all cached in a 32-bit EFLAGS image, just like the x86 EFLAGS register expects. All other eflags are store in the 32-bit register also, with a few also mirrored in separate fields for now. The reason I did this, was so that on x86 hosts, asm() statements can be #ifdef'd in to do the calculation and get the native eflags results very cheaply. Just to test that it works, I coded ADD_EdId() and ADD_EwIw() with some conditionally compiled asm()s for accelerated eflags processing and it works. -Kevin
2002-09-08 08:08:14 +04:00
Bit16u op2_16, op1_16, sum_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
op2_16 = i->Iw();
I rehashed the way the EFLAGS register was stored internally. All the EFLAGS bits used to be cached in separate fields. I left a few of them in separate fields for now - might remove them at some point also. When the arithmetic fields are known (ie they're not in lazy mode), they are all cached in a 32-bit EFLAGS image, just like the x86 EFLAGS register expects. All other eflags are store in the 32-bit register also, with a few also mirrored in separate fields for now. The reason I did this, was so that on x86 hosts, asm() statements can be #ifdef'd in to do the calculation and get the native eflags results very cheaply. Just to test that it works, I coded ADD_EdId() and ADD_EwIw() with some conditionally compiled asm()s for accelerated eflags processing and it works. -Kevin
2002-09-08 08:08:14 +04:00
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
Bit32u flags32;
asm (
"addw %3, %1 \n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32), "=r" (sum_16)
: "1" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) |
(flags32 & EFlagsOSZAPCMask);
BX_CPU_THIS_PTR lf_flags_status = 0;
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
#else
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
sum_16 = op1_16 + op2_16;
Split out JZ/JNZ instructions from JCC because they were called so frequently. Coded asm() statements for INC/DEC_ERX() instructions. Cleaned up the iCache a litle including a bug fix. The generation ID was decrementing the whole field including some high meta bits. That could roll over after 1 Billion cycles. I know only decrement if the field is valid, to save the write. I implemented inline functions which can serve the value of the arithmetic flags if they are cached, and redirect to the lazy_flags.cc routines if not. Most of this was just prep work for adding more asm() statements for native eflags processing when on x86.
2002-09-22 05:52:21 +04:00
#endif
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
Write_RMW_virtual_word(sum_16);
#if !(defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_INSTR_ADD16);
#endif
}
void
BX_CPU_C::ADD_EGwIw(bxInstruction_c *i)
{
Bit16u op2_16, op1_16, sum_16;
op2_16 = i->Iw();
op1_16 = BX_READ_16BIT_REG(i->rm());
I rehashed the way the EFLAGS register was stored internally. All the EFLAGS bits used to be cached in separate fields. I left a few of them in separate fields for now - might remove them at some point also. When the arithmetic fields are known (ie they're not in lazy mode), they are all cached in a 32-bit EFLAGS image, just like the x86 EFLAGS register expects. All other eflags are store in the 32-bit register also, with a few also mirrored in separate fields for now. The reason I did this, was so that on x86 hosts, asm() statements can be #ifdef'd in to do the calculation and get the native eflags results very cheaply. Just to test that it works, I coded ADD_EdId() and ADD_EwIw() with some conditionally compiled asm()s for accelerated eflags processing and it works. -Kevin
2002-09-08 08:08:14 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
Bit32u flags32;
asm (
"addw %3, %1 \n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32), "=r" (sum_16)
: "1" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) |
(flags32 & EFlagsOSZAPCMask);
BX_CPU_THIS_PTR lf_flags_status = 0;
I rehashed the way the EFLAGS register was stored internally. All the EFLAGS bits used to be cached in separate fields. I left a few of them in separate fields for now - might remove them at some point also. When the arithmetic fields are known (ie they're not in lazy mode), they are all cached in a 32-bit EFLAGS image, just like the x86 EFLAGS register expects. All other eflags are store in the 32-bit register also, with a few also mirrored in separate fields for now. The reason I did this, was so that on x86 hosts, asm() statements can be #ifdef'd in to do the calculation and get the native eflags results very cheaply. Just to test that it works, I coded ADD_EdId() and ADD_EwIw() with some conditionally compiled asm()s for accelerated eflags processing and it works. -Kevin
2002-09-08 08:08:14 +04:00
#else
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
sum_16 = op1_16 + op2_16;
I rehashed the way the EFLAGS register was stored internally. All the EFLAGS bits used to be cached in separate fields. I left a few of them in separate fields for now - might remove them at some point also. When the arithmetic fields are known (ie they're not in lazy mode), they are all cached in a 32-bit EFLAGS image, just like the x86 EFLAGS register expects. All other eflags are store in the 32-bit register also, with a few also mirrored in separate fields for now. The reason I did this, was so that on x86 hosts, asm() statements can be #ifdef'd in to do the calculation and get the native eflags results very cheaply. Just to test that it works, I coded ADD_EdId() and ADD_EwIw() with some conditionally compiled asm()s for accelerated eflags processing and it works. -Kevin
2002-09-08 08:08:14 +04:00
#endif
Split out reg-reg and reg-memory cases for a few other high-profile instructions, mainly variants of MOV. Had to update fetchdecode64 to keep it inline with the 32-bit mods.
2002-09-29 23:21:38 +04:00
BX_WRITE_16BIT_REG(i->rm(), sum_16);
I rehashed the way the EFLAGS register was stored internally. All the EFLAGS bits used to be cached in separate fields. I left a few of them in separate fields for now - might remove them at some point also. When the arithmetic fields are known (ie they're not in lazy mode), they are all cached in a 32-bit EFLAGS image, just like the x86 EFLAGS register expects. All other eflags are store in the 32-bit register also, with a few also mirrored in separate fields for now. The reason I did this, was so that on x86 hosts, asm() statements can be #ifdef'd in to do the calculation and get the native eflags results very cheaply. Just to test that it works, I coded ADD_EdId() and ADD_EwIw() with some conditionally compiled asm()s for accelerated eflags processing and it works. -Kevin
2002-09-08 08:08:14 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if !(defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
I rehashed the way the EFLAGS register was stored internally. All the EFLAGS bits used to be cached in separate fields. I left a few of them in separate fields for now - might remove them at some point also. When the arithmetic fields are known (ie they're not in lazy mode), they are all cached in a 32-bit EFLAGS image, just like the x86 EFLAGS register expects. All other eflags are store in the 32-bit register also, with a few also mirrored in separate fields for now. The reason I did this, was so that on x86 hosts, asm() statements can be #ifdef'd in to do the calculation and get the native eflags results very cheaply. Just to test that it works, I coded ADD_EdId() and ADD_EwIw() with some conditionally compiled asm()s for accelerated eflags processing and it works. -Kevin
2002-09-08 08:08:14 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_INSTR_ADD16);
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::ADC_EwIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Boolean temp_CF;
Bit16u op2_16, op1_16, sum_16;
I updated code that was using !!get_CF() (or other arithmetic flag) to use getB_CF() etc. getB_CF() and friends are only for a relatively small number of cases where a true boolean/binary number (0 or 1) is required rather than 0 or non-0 as is returned by get_CF().
2002-09-24 22:33:38 +04:00
temp_CF = getB_CF();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
sum_16 = op1_16 + op2_16 + temp_CF;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), sum_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
sum_16 = op1_16 + op2_16 + temp_CF;
Write_RMW_virtual_word(sum_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16_CF(op1_16, op2_16, sum_16, BX_INSTR_ADC16,
temp_CF);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::SUB_EwIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op2_16, op1_16, diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
diff_16 = op1_16 - op2_16;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), diff_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
diff_16 = op1_16 - op2_16;
Write_RMW_virtual_word(diff_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_SUB16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::CMP_EwIw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit16u op2_16, op1_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
op2_16 = i->Iw();
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
}
else {
read_virtual_word(i->seg(), RMAddr(i), &op1_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added new configure option --enable-host-specific-asms, so the user can turn on/off use of native host specific inline asm statements. By default, this option is enabled, so you only need it to disable inline asms in your compile for now. Currently only on x86+GCC environments, will inline asm() statements be used. Eventually, other platforms could specify some asm()s; probably for endian issues such as byte-swapping and unaligned memory accesses. On x86, there are some inline asm()s which do the arithmetic EFLAGS processing so that the lazy flags handling is somewhat bypassed. Eventually, I'll add more, at least for the more common instructions. This adds a little extra performance.
2002-09-23 21:59:18 +04:00
#if (defined(__i386__) && defined(__GNUC__) && BX_SupportHostAsms)
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
Bit32u flags32;
asm (
"cmpw %2, %1\n\t"
"pushfl \n\t"
"popl %0"
: "=g" (flags32)
: "r" (op1_16), "g" (op2_16)
: "cc"
);
BX_CPU_THIS_PTR eflags.val32 =
Committed [english] patches from Jas Sandys-Lumsdaine. These were simply replacements of the eflags mask constants with the macro names already in cpu.h for asm() statements. I forgot to use the macros for some instructions. 0x000008d5 -> EFlagsOSZAPCMask 0x000008d4 -> EFlagsOSZAPMask
2002-09-28 05:16:09 +04:00
(BX_CPU_THIS_PTR eflags.val32 & ~EFlagsOSZAPCMask) | (flags32 & EFlagsOSZAPCMask);
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
BX_CPU_THIS_PTR lf_flags_status = 0;
#else
Bit16u diff_16;
diff_16 = op1_16 - op2_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added more x86 specific asm() code to directly handle eflags return values for some common instructions (like test/and/cmp). Only compiles in on x86 of course.
2002-09-23 02:22:16 +04:00
SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_INSTR_CMP16);
#endif
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::NEG_Ew(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op1_16, diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
diff_16 = 0 - op1_16;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), diff_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
diff_16 = 0 - op1_16;
Write_RMW_virtual_word(diff_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(op1_16, 0, diff_16, BX_INSTR_NEG16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::INC_Ew(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op1_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
op1_16++;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), op1_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
op1_16++;
Write_RMW_virtual_word(op1_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAP_16(0, 0, op1_16, BX_INSTR_INC16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::DEC_Ew(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op1_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
op1_16--;
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
BX_WRITE_16BIT_REG(i->rm(), op1_16);
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
op1_16--;
Write_RMW_virtual_word(op1_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAP_16(0, 0, op1_16, BX_INSTR_DEC16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
void
Updated accessing of modrm/sib addressing information to use accessors. This lets me work on compressing the size of fetch-decode structure (now called bxInstruction_c). I've reduced it down to about 76 bytes. We should be able to do much better soon. I needed the abstraction of the accessors, so I have a lot of freedom to re-arrange things without making massive future changes. Lost a few percent of performance in these mods, but my main focus was to get the abstraction.
2002-09-18 02:50:53 +04:00
BX_CPU_C::CMPXCHG_EwGw(bxInstruction_c *i)
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
{
#if (BX_CPU_LEVEL >= 4) || (BX_CPU_LEVEL_HACKED >= 4)
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Bit16u op2_16, op1_16, diff_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
op1_16 = BX_READ_16BIT_REG(i->rm());
}
else {
read_RMW_virtual_word(i->seg(), RMAddr(i), &op1_16);
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
diff_16 = AX - op1_16;
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
SET_FLAGS_OSZAPC_16(AX, op1_16, diff_16, BX_INSTR_CMP16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (diff_16 == 0) { // if accumulator == dest
// ZF = 1
set_ZF(1);
// dest <-- src
op2_16 = BX_READ_16BIT_REG(i->nnn());
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
if (i->modC0()) {
BX_WRITE_16BIT_REG(i->rm(), op2_16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
else {
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
Write_RMW_virtual_word(op2_16);
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
}
Added ./configure option --enable-all-optimizations which turns on all available optimizations in one shot. Finished one last case of an instruction which could but didn't use the Read-Modify-Write variants of access.cc functions. Started going through the integer instructions, merging obvious cases where there are two "if (modrm==11b) {" clauses and very little action in between, and cleaning up the aweful indentation leftover from many years ago when those instructions were implemented using cut-and-paste. We may get a little extra performance out of these mods, but they'll also be easier after I'm finished to enhance with asm() statements to knock out the lazy flags processing on x86.
2002-09-30 06:02:06 +04:00
}
else {
// ZF = 0
set_ZF(0);
// accumulator <-- dest
AX = op1_16;
}
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
#else
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
2001-05-30 22:56:02 +04:00
BX_PANIC(("CMPXCHG_EwGw:"));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
#endif
}
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