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Bochs/bochs/cpu/ctrl_xfer8.cc
Stanislav Shwartsman f552a1c861 Apply patches: 
907163 ctrl_xfer8 clean/speed up   2004-02-29 14:32 nobody psychosmurf
907161 clean/speed up of io.cc   2004-02-29 14:31 nobody psychosmurf
2004-03-02 20:48:48 +00:00

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/////////////////////////////////////////////////////////////////////////
// $Id: ctrl_xfer8.cc,v 1.15 2004-03-02 20:48:47 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
//
// 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
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#define LOG_THIS BX_CPU_THIS_PTR
#if BX_SUPPORT_X86_64==0
// Make life a little easier for the 64/32-bit merge.
#define RCX ECX
#define RIP EIP
#endif
void
BX_CPU_C::JCXZ_Jb(bxInstruction_c *i)
{
BailBigRSP("JCXZ_Jb");
#if BX_SUPPORT_X86_64
if (i->as64L()) {
if ( RCX == 0 ) {
RIP += (Bit32s) i->Id();
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, RIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
}
else
#endif
{
Bit32u temp_ECX;
if (i->as32L())
temp_ECX = ECX;
else
temp_ECX = CX;
if ( temp_ECX == 0 ) {
Bit32u new_EIP;
new_EIP = EIP + (Bit32s) i->Id();
if (i->os32L()==0)
new_EIP &= 0x0000ffff;
#if BX_CPU_LEVEL >= 2
if (protected_mode()) {
if ( new_EIP > BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled ) {
BX_PANIC(("jcxz_jb: offset outside of CS limits"));
exception(BX_GP_EXCEPTION, 0, 0);
}
}
#endif
EIP = new_EIP;
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, new_EIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
}
}
void
BX_CPU_C::LOOPNE_Jb(bxInstruction_c *i)
{
BailBigRSP("loopne_jb");
#if BX_SUPPORT_X86_64
if (i->as64L()) {
if ( ((--RCX)!=0) && (get_ZF()==0) ) {
RIP += (Bit32s) i->Id();
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, RIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
}
else
#endif
{
Bit32u count, new_EIP;
#if BX_CPU_LEVEL >= 3
if (i->as32L())
count = ECX;
else
#endif /* BX_CPU_LEVEL >= 3 */
count = CX;
count--;
if ( (count!=0) && (get_ZF()==0) ) {
new_EIP = EIP + (Bit32s) i->Id();
if (i->os32L()==0)
new_EIP &= 0x0000ffff;
if (protected_mode()) {
if (new_EIP > BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled) {
BX_PANIC(("loopne_jb: offset outside of CS limits"));
exception(BX_GP_EXCEPTION, 0, 0);
}
}
EIP = new_EIP;
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, new_EIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
if (i->as32L())
RCX = ECX - 1; // zero extend
else
CX--;
}
}
void
BX_CPU_C::LOOPE_Jb(bxInstruction_c *i)
{
BailBigRSP("loope_jb");
#if BX_SUPPORT_X86_64
if (i->as64L()) {
if ( ((--RCX)!=0) && (get_ZF()) ) {
RIP += (Bit32s) i->Id();
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, RIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
}
else
#endif
{
Bit32u count, new_EIP;
#if BX_CPU_LEVEL >= 3
if (i->as32L())
count = ECX;
else
#endif /* BX_CPU_LEVEL >= 3 */
count = CX;
count--;
if ( (count!=0) && get_ZF()) {
new_EIP = EIP + (Bit32s) i->Id();
if (i->os32L()==0)
new_EIP &= 0x0000ffff;
if (protected_mode()) {
if (new_EIP > BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled) {
BX_PANIC(("loope_jb: offset outside of CS limits"));
exception(BX_GP_EXCEPTION, 0, 0);
}
}
EIP = new_EIP;
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, new_EIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
if (i->as32L())
RCX = ECX - 1; // zero extend
else
CX--;
}
}
void
BX_CPU_C::LOOP_Jb(bxInstruction_c *i)
{
BailBigRSP("loop_jb");
#if BX_SUPPORT_X86_64
if (i->as64L()) {
if ( ((--RCX)!=0) ) {
RIP += (Bit32s) i->Id();
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, RIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
}
else
#endif
{
Bit32u count, new_EIP;
#if BX_CPU_LEVEL >= 3
if (i->as32L())
count = ECX;
else
#endif /* BX_CPU_LEVEL >= 3 */
count = CX;
count--;
if (count != 0) {
new_EIP = EIP + (Bit32s) i->Id();
if (i->os32L()==0)
new_EIP &= 0x0000ffff;
if (protected_mode()) {
if (new_EIP > BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled) {
BX_PANIC(("loop_jb: offset outside of CS limits"));
exception(BX_GP_EXCEPTION, 0, 0);
}
}
EIP = new_EIP;
BX_INSTR_CNEAR_BRANCH_TAKEN(BX_CPU_ID, new_EIP);
revalidate_prefetch_q();
}
#if BX_INSTRUMENTATION
else {
BX_INSTR_CNEAR_BRANCH_NOT_TAKEN(BX_CPU_ID);
}
#endif
if (i->as32L())
RCX = ECX - 1; // zero extend
else
CX--;
}
}
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