1006 lines
32 KiB
C++
1006 lines
32 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: lazy_flags.cc,v 1.24 2004-08-27 18:43:23 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#define NEED_CPU_REG_SHORTCUTS 1
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#include "bochs.h"
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#define LOG_THIS BX_CPU_THIS_PTR
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bx_bool BX_CPU_C::get_CFLazy(void)
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{
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unsigned cf;
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switch ( BX_CPU_THIS_PTR lf_flags_status & 0x00000f ) {
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case BX_LF_INDEX_OSZAPC:
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switch (BX_CPU_THIS_PTR oszapc.instr) {
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case BX_INSTR_ADD8:
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cf = (BX_CPU_THIS_PTR oszapc.result_8 <
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BX_CPU_THIS_PTR oszapc.op1_8);
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break;
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case BX_INSTR_ADD16:
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cf = (BX_CPU_THIS_PTR oszapc.result_16 <
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BX_CPU_THIS_PTR oszapc.op1_16);
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break;
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case BX_INSTR_ADD32:
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cf = (BX_CPU_THIS_PTR oszapc.result_32 <
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BX_CPU_THIS_PTR oszapc.op1_32);
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_ADD64:
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cf = (BX_CPU_THIS_PTR oszapc.result_64 <
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BX_CPU_THIS_PTR oszapc.op1_64);
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break;
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#endif
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// used only if CF = 1 when executing ADC instruction
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case BX_INSTR_ADC8:
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cf = (BX_CPU_THIS_PTR oszapc.result_8 <=
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BX_CPU_THIS_PTR oszapc.op1_8);
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break;
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// used only if CF = 1 when executing ADC instruction
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case BX_INSTR_ADC16:
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cf = (BX_CPU_THIS_PTR oszapc.result_16 <=
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BX_CPU_THIS_PTR oszapc.op1_16);
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break;
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// used only if CF = 1 when executing ADC instruction
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case BX_INSTR_ADC32:
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cf = (BX_CPU_THIS_PTR oszapc.result_32 <=
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BX_CPU_THIS_PTR oszapc.op1_32);
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break;
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#if BX_SUPPORT_X86_64
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// used only if CF = 1 when executing ADC instruction
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case BX_INSTR_ADC64:
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cf = (BX_CPU_THIS_PTR oszapc.result_64 <=
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BX_CPU_THIS_PTR oszapc.op1_64);
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break;
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#endif
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case BX_INSTR_SUB8:
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case BX_INSTR_COMPARE8:
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cf = (BX_CPU_THIS_PTR oszapc.op1_8 <
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BX_CPU_THIS_PTR oszapc.op2_8);
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break;
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case BX_INSTR_SUB16:
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case BX_INSTR_COMPARE16:
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cf = (BX_CPU_THIS_PTR oszapc.op1_16 <
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BX_CPU_THIS_PTR oszapc.op2_16);
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break;
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case BX_INSTR_SUB32:
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case BX_INSTR_COMPARE32:
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cf = (BX_CPU_THIS_PTR oszapc.op1_32 <
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BX_CPU_THIS_PTR oszapc.op2_32);
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_SUB64:
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case BX_INSTR_COMPARE64:
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cf = (BX_CPU_THIS_PTR oszapc.op1_64 <
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BX_CPU_THIS_PTR oszapc.op2_64);
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break;
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#endif
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// used only if CF = 1 when executing SBB instruction
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case BX_INSTR_SBB8:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_8 < BX_CPU_THIS_PTR oszapc.result_8) ||
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(BX_CPU_THIS_PTR oszapc.op2_8==0xff);
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break;
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// used only if CF = 1 when executing SBB instruction
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case BX_INSTR_SBB16:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_16 < BX_CPU_THIS_PTR oszapc.result_16) ||
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(BX_CPU_THIS_PTR oszapc.op2_16==0xffff);
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break;
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// used only if CF = 1 when executing SBB instruction
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case BX_INSTR_SBB32:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_32 < BX_CPU_THIS_PTR oszapc.result_32) ||
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(BX_CPU_THIS_PTR oszapc.op2_32==0xffffffff);
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break;
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#if BX_SUPPORT_X86_64
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// used only if CF = 1 when executing SBB instruction
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case BX_INSTR_SBB64:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_64 < BX_CPU_THIS_PTR oszapc.result_64) ||
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(BX_CPU_THIS_PTR oszapc.op2_64==BX_CONST64(0xffffffffffffffff));
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break;
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#endif
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case BX_INSTR_NEG8:
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cf = BX_CPU_THIS_PTR oszapc.result_8 != 0;
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break;
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case BX_INSTR_NEG16:
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cf = BX_CPU_THIS_PTR oszapc.result_16 != 0;
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break;
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case BX_INSTR_NEG32:
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cf = BX_CPU_THIS_PTR oszapc.result_32 != 0;
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_NEG64:
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cf = BX_CPU_THIS_PTR oszapc.result_64 != 0;
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break;
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#endif
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case BX_INSTR_LOGIC8:
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case BX_INSTR_LOGIC16:
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case BX_INSTR_LOGIC32:
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case BX_INSTR_BITSCAN16:
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case BX_INSTR_BITSCAN32:
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#if BX_SUPPORT_X86_64
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case BX_INSTR_LOGIC64:
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case BX_INSTR_BITSCAN64:
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#endif
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cf = 0;
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break;
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case BX_INSTR_SAR8:
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if (BX_CPU_THIS_PTR oszapc.op2_8 < 8) {
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_8 >>
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(BX_CPU_THIS_PTR oszapc.op2_8 - 1)) & 0x01;
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}
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else {
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cf = (BX_CPU_THIS_PTR oszapc.op1_8 & 0x80) > 0;
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}
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break;
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case BX_INSTR_SHR8:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_8 >>
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(BX_CPU_THIS_PTR oszapc.op2_8 - 1)) & 0x01;
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break;
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case BX_INSTR_SAR16:
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if (BX_CPU_THIS_PTR oszapc.op2_16 < 16) {
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_16 >>
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(BX_CPU_THIS_PTR oszapc.op2_16 - 1)) & 0x01;
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}
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else {
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cf = (BX_CPU_THIS_PTR oszapc.op1_16 & 0x8000) > 0;
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}
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break;
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case BX_INSTR_SHR16:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_16 >>
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(BX_CPU_THIS_PTR oszapc.op2_16 - 1)) & 0x01;
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break;
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case BX_INSTR_SAR32:
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case BX_INSTR_SHR32:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_32 >>
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(BX_CPU_THIS_PTR oszapc.op2_32 - 1)) & 0x01;
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_SAR64:
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case BX_INSTR_SHR64:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_64 >>
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(BX_CPU_THIS_PTR oszapc.op2_64 - 1)) & 0x01;
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break;
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#endif
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case BX_INSTR_SHL8:
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if (BX_CPU_THIS_PTR oszapc.op2_8 <= 8) {
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_8 >>
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(8 - BX_CPU_THIS_PTR oszapc.op2_8)) & 0x01;
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}
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else {
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cf = 0;
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}
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break;
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case BX_INSTR_SHL16:
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if (BX_CPU_THIS_PTR oszapc.op2_16 <= 16) {
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_16 >>
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(16 - BX_CPU_THIS_PTR oszapc.op2_16)) & 0x01;
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}
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else {
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cf = 0;
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}
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break;
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case BX_INSTR_SHL32:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_32 >>
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(32 - BX_CPU_THIS_PTR oszapc.op2_32)) & 0x01;
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_SHL64:
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cf =
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(BX_CPU_THIS_PTR oszapc.op1_64 >>
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(64 - BX_CPU_THIS_PTR oszapc.op2_64)) & 0x01;
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break;
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#endif
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case BX_INSTR_MUL8:
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cf = (BX_CPU_THIS_PTR oszapc.op2_8 != 0);
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break;
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case BX_INSTR_MUL16:
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cf = (BX_CPU_THIS_PTR oszapc.op2_16 != 0);
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break;
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case BX_INSTR_MUL32:
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cf = (BX_CPU_THIS_PTR oszapc.op2_32 != 0);
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_MUL64:
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cf = (BX_CPU_THIS_PTR oszapc.op2_64 != 0);
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break;
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#endif
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default:
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cf = 0; // Keep compiler quiet.
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BX_PANIC(("get_CF: OSZAPC: unknown instr %u",
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(unsigned) BX_CPU_THIS_PTR oszapc.instr));
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}
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BX_CPU_THIS_PTR lf_flags_status &= 0xfffff0;
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BX_CPU_THIS_PTR eflags.val32 &= ~(1<<0);
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BX_CPU_THIS_PTR eflags.val32 |= (!!cf)<<0;
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return(cf);
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default:
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BX_PANIC(("get_CF: unknown case"));
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return(0);
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}
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}
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bx_bool BX_CPU_C::get_AFLazy(void)
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{
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unsigned af;
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switch ( (BX_CPU_THIS_PTR lf_flags_status>>8) & 0x00000f ) {
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case BX_LF_INDEX_OSZAPC:
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switch (BX_CPU_THIS_PTR oszapc.instr) {
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case BX_INSTR_COMPARE8:
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case BX_INSTR_ADD8:
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case BX_INSTR_ADC8:
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case BX_INSTR_SUB8:
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case BX_INSTR_SBB8:
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af =
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((BX_CPU_THIS_PTR oszapc.op1_8 ^
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BX_CPU_THIS_PTR oszapc.op2_8) ^
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BX_CPU_THIS_PTR oszapc.result_8) & 0x10;
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break;
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case BX_INSTR_COMPARE16:
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case BX_INSTR_ADD16:
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case BX_INSTR_ADC16:
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case BX_INSTR_SUB16:
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case BX_INSTR_SBB16:
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af =
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((BX_CPU_THIS_PTR oszapc.op1_16 ^
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BX_CPU_THIS_PTR oszapc.op2_16) ^
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BX_CPU_THIS_PTR oszapc.result_16) & 0x10;
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break;
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case BX_INSTR_COMPARE32:
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case BX_INSTR_ADD32:
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case BX_INSTR_ADC32:
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case BX_INSTR_SUB32:
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case BX_INSTR_SBB32:
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af =
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((BX_CPU_THIS_PTR oszapc.op1_32 ^
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BX_CPU_THIS_PTR oszapc.op2_32) ^
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BX_CPU_THIS_PTR oszapc.result_32) & 0x10;
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_COMPARE64:
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case BX_INSTR_ADD64:
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case BX_INSTR_ADC64:
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case BX_INSTR_SUB64:
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case BX_INSTR_SBB64:
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af =
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((BX_CPU_THIS_PTR oszapc.op1_64 ^
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BX_CPU_THIS_PTR oszapc.op2_64) ^
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BX_CPU_THIS_PTR oszapc.result_64) & 0x10;
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break;
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#endif
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case BX_INSTR_NEG8:
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af = (BX_CPU_THIS_PTR oszapc.result_8 & 0x0f) != 0;
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break;
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case BX_INSTR_NEG16:
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af = (BX_CPU_THIS_PTR oszapc.result_16 & 0x0f) != 0;
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break;
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case BX_INSTR_NEG32:
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af = (BX_CPU_THIS_PTR oszapc.result_32 & 0x0f) != 0;
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_NEG64:
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af = (BX_CPU_THIS_PTR oszapc.result_64 & 0x0f) != 0;
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break;
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#endif
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case BX_INSTR_LOGIC8:
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case BX_INSTR_LOGIC16:
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case BX_INSTR_LOGIC32:
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case BX_INSTR_BITSCAN16:
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case BX_INSTR_BITSCAN32:
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#if BX_SUPPORT_X86_64
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case BX_INSTR_LOGIC64:
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case BX_INSTR_BITSCAN64:
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case BX_INSTR_SAR64:
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case BX_INSTR_SHR64:
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case BX_INSTR_SHL64:
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case BX_INSTR_MUL64:
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#endif
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case BX_INSTR_SAR8:
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case BX_INSTR_SAR16:
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case BX_INSTR_SAR32:
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case BX_INSTR_SHR8:
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case BX_INSTR_SHR16:
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case BX_INSTR_SHR32:
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case BX_INSTR_SHL8:
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case BX_INSTR_SHL16:
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case BX_INSTR_SHL32:
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case BX_INSTR_MUL8:
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case BX_INSTR_MUL16:
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case BX_INSTR_MUL32:
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af = 0;
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break;
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default:
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af = 0; // Keep compiler quiet.
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BX_PANIC(("get_AF: OSZAPC: unknown instr %u",
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(unsigned) BX_CPU_THIS_PTR oszapc.instr));
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}
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BX_CPU_THIS_PTR lf_flags_status &= 0xfff0ff;
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BX_CPU_THIS_PTR eflags.val32 &= ~(1<<4);
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BX_CPU_THIS_PTR eflags.val32 |= (!!af)<<4;
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return(af);
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case BX_LF_INDEX_OSZAP:
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switch (BX_CPU_THIS_PTR oszap.instr) {
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case BX_INSTR_INC8:
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af = (BX_CPU_THIS_PTR oszap.result_8 & 0x0f) == 0;
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break;
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case BX_INSTR_INC16:
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af = (BX_CPU_THIS_PTR oszap.result_16 & 0x0f) == 0;
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break;
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case BX_INSTR_INC32:
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af = (BX_CPU_THIS_PTR oszap.result_32 & 0x0f) == 0;
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_INC64:
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af = (BX_CPU_THIS_PTR oszap.result_64 & 0x0f) == 0;
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break;
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#endif
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case BX_INSTR_DEC8:
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af = (BX_CPU_THIS_PTR oszap.result_8 & 0x0f) == 0x0f;
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break;
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case BX_INSTR_DEC16:
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af = (BX_CPU_THIS_PTR oszap.result_16 & 0x0f) == 0x0f;
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break;
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case BX_INSTR_DEC32:
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af = (BX_CPU_THIS_PTR oszap.result_32 & 0x0f) == 0x0f;
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break;
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#if BX_SUPPORT_X86_64
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case BX_INSTR_DEC64:
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af = (BX_CPU_THIS_PTR oszap.result_64 & 0x0f) == 0x0f;
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break;
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#endif
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default:
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af = 0; // Keep compiler quiet.
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BX_PANIC(("get_AF: OSZAP: unknown instr %u",
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(unsigned) BX_CPU_THIS_PTR oszap.instr));
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}
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BX_CPU_THIS_PTR lf_flags_status &= 0xfff0ff;
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BX_CPU_THIS_PTR eflags.val32 &= ~(1<<4);
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BX_CPU_THIS_PTR eflags.val32 |= (!!af)<<4;
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return(af);
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default:
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BX_PANIC(("get_AF: unknown case"));
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return(0);
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}
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}
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bx_bool BX_CPU_C::get_ZFLazy(void)
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{
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unsigned zf;
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switch ( (BX_CPU_THIS_PTR lf_flags_status>>12) & 0x00000f ) {
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case BX_LF_INDEX_OSZAPC:
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switch (BX_CPU_THIS_PTR oszapc.instr) {
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case BX_INSTR_LOGIC8:
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case BX_INSTR_ADD8:
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case BX_INSTR_ADC8:
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case BX_INSTR_SUB8:
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case BX_INSTR_SBB8:
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case BX_INSTR_COMPARE8:
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case BX_INSTR_NEG8:
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case BX_INSTR_SAR8:
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case BX_INSTR_SHR8:
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case BX_INSTR_SHL8:
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zf = (BX_CPU_THIS_PTR oszapc.result_8 == 0);
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break;
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case BX_INSTR_LOGIC16:
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case BX_INSTR_ADD16:
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case BX_INSTR_ADC16:
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case BX_INSTR_SUB16:
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case BX_INSTR_SBB16:
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case BX_INSTR_COMPARE16:
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case BX_INSTR_NEG16:
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case BX_INSTR_SAR16:
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case BX_INSTR_SHR16:
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case BX_INSTR_SHL16:
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zf = (BX_CPU_THIS_PTR oszapc.result_16 == 0);
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break;
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case BX_INSTR_LOGIC32:
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case BX_INSTR_ADD32:
|
|
case BX_INSTR_ADC32:
|
|
case BX_INSTR_SUB32:
|
|
case BX_INSTR_SBB32:
|
|
case BX_INSTR_COMPARE32:
|
|
case BX_INSTR_NEG32:
|
|
case BX_INSTR_SAR32:
|
|
case BX_INSTR_SHR32:
|
|
case BX_INSTR_SHL32:
|
|
zf = (BX_CPU_THIS_PTR oszapc.result_32 == 0);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_LOGIC64:
|
|
case BX_INSTR_ADD64:
|
|
case BX_INSTR_ADC64:
|
|
case BX_INSTR_SUB64:
|
|
case BX_INSTR_SBB64:
|
|
case BX_INSTR_COMPARE64:
|
|
case BX_INSTR_NEG64:
|
|
case BX_INSTR_SAR64:
|
|
case BX_INSTR_SHR64:
|
|
case BX_INSTR_SHL64:
|
|
zf = (BX_CPU_THIS_PTR oszapc.result_64 == 0);
|
|
break;
|
|
#endif
|
|
case BX_INSTR_MUL8:
|
|
zf = (BX_CPU_THIS_PTR oszapc.op1_8 |
|
|
BX_CPU_THIS_PTR oszapc.op2_8) == 0;
|
|
break;
|
|
case BX_INSTR_MUL16:
|
|
zf = (BX_CPU_THIS_PTR oszapc.op1_16 |
|
|
BX_CPU_THIS_PTR oszapc.op2_16) == 0;
|
|
break;
|
|
case BX_INSTR_MUL32:
|
|
zf = (BX_CPU_THIS_PTR oszapc.op1_32 |
|
|
BX_CPU_THIS_PTR oszapc.op2_32) == 0;
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_MUL64:
|
|
zf = (BX_CPU_THIS_PTR oszapc.op1_64 |
|
|
BX_CPU_THIS_PTR oszapc.op2_64) == 0;
|
|
break;
|
|
#endif
|
|
case BX_INSTR_BITSCAN16:
|
|
case BX_INSTR_BITSCAN32:
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_BITSCAN64:
|
|
#endif
|
|
zf = 0;
|
|
break;
|
|
default:
|
|
zf = 0;
|
|
BX_PANIC(("get_ZF: OSZAPC: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0xff0fff;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<6);
|
|
BX_CPU_THIS_PTR eflags.val32 |= zf<<6; // zf always exactly 0 or 1.
|
|
return(zf);
|
|
|
|
case BX_LF_INDEX_OSZAP:
|
|
switch (BX_CPU_THIS_PTR oszap.instr) {
|
|
case BX_INSTR_INC8:
|
|
case BX_INSTR_DEC8:
|
|
zf = (BX_CPU_THIS_PTR oszap.result_8 == 0);
|
|
break;
|
|
case BX_INSTR_INC16:
|
|
case BX_INSTR_DEC16:
|
|
zf = (BX_CPU_THIS_PTR oszap.result_16 == 0);
|
|
break;
|
|
case BX_INSTR_INC32:
|
|
case BX_INSTR_DEC32:
|
|
zf = (BX_CPU_THIS_PTR oszap.result_32 == 0);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_INC64:
|
|
case BX_INSTR_DEC64:
|
|
zf = (BX_CPU_THIS_PTR oszap.result_64 == 0);
|
|
break;
|
|
#endif
|
|
default:
|
|
zf = 0;
|
|
BX_PANIC(("get_ZF: OSZAP: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0xff0fff;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<6);
|
|
BX_CPU_THIS_PTR eflags.val32 |= zf<<6; // zf always exactly 0 or 1.
|
|
return(zf);
|
|
|
|
default:
|
|
BX_PANIC(("get_ZF: unknown case"));
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
bx_bool BX_CPU_C::get_SFLazy(void)
|
|
{
|
|
unsigned sf;
|
|
|
|
switch ( (BX_CPU_THIS_PTR lf_flags_status>>16) & 0x00000f ) {
|
|
case BX_LF_INDEX_OSZAPC:
|
|
switch (BX_CPU_THIS_PTR oszapc.instr) {
|
|
case BX_INSTR_LOGIC8:
|
|
case BX_INSTR_ADD8:
|
|
case BX_INSTR_ADC8:
|
|
case BX_INSTR_SUB8:
|
|
case BX_INSTR_SBB8:
|
|
case BX_INSTR_COMPARE8:
|
|
case BX_INSTR_NEG8:
|
|
case BX_INSTR_SAR8:
|
|
case BX_INSTR_SHR8:
|
|
case BX_INSTR_SHL8:
|
|
sf = (BX_CPU_THIS_PTR oszapc.result_8 >= 0x80);
|
|
break;
|
|
case BX_INSTR_LOGIC16:
|
|
case BX_INSTR_ADD16:
|
|
case BX_INSTR_ADC16:
|
|
case BX_INSTR_SUB16:
|
|
case BX_INSTR_SBB16:
|
|
case BX_INSTR_COMPARE16:
|
|
case BX_INSTR_NEG16:
|
|
case BX_INSTR_SAR16:
|
|
case BX_INSTR_SHR16:
|
|
case BX_INSTR_SHL16:
|
|
case BX_INSTR_BITSCAN16:
|
|
sf = (BX_CPU_THIS_PTR oszapc.result_16 >= 0x8000);
|
|
break;
|
|
case BX_INSTR_LOGIC32:
|
|
case BX_INSTR_ADD32:
|
|
case BX_INSTR_ADC32:
|
|
case BX_INSTR_SUB32:
|
|
case BX_INSTR_SBB32:
|
|
case BX_INSTR_COMPARE32:
|
|
case BX_INSTR_NEG32:
|
|
case BX_INSTR_SAR32:
|
|
case BX_INSTR_SHR32:
|
|
case BX_INSTR_SHL32:
|
|
case BX_INSTR_BITSCAN32:
|
|
sf = (BX_CPU_THIS_PTR oszapc.result_32 >= 0x80000000);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_LOGIC64:
|
|
case BX_INSTR_ADD64:
|
|
case BX_INSTR_ADC64:
|
|
case BX_INSTR_SUB64:
|
|
case BX_INSTR_SBB64:
|
|
case BX_INSTR_COMPARE64:
|
|
case BX_INSTR_NEG64:
|
|
case BX_INSTR_SAR64:
|
|
case BX_INSTR_SHR64:
|
|
case BX_INSTR_SHL64:
|
|
case BX_INSTR_BITSCAN64:
|
|
sf = (BX_CPU_THIS_PTR oszapc.result_64 >= BX_CONST64(0x8000000000000000));
|
|
break;
|
|
#endif
|
|
case BX_INSTR_MUL8:
|
|
sf = (BX_CPU_THIS_PTR oszapc.op2_8 >= 0x80);
|
|
break;
|
|
case BX_INSTR_MUL16:
|
|
sf = (BX_CPU_THIS_PTR oszapc.op2_16 >= 0x8000);
|
|
break;
|
|
case BX_INSTR_MUL32:
|
|
sf = (BX_CPU_THIS_PTR oszapc.op2_32 >= 0x80000000);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_MUL64:
|
|
sf = (BX_CPU_THIS_PTR oszapc.op2_64 >= BX_CONST64(0x8000000000000000));
|
|
break;
|
|
#endif
|
|
default:
|
|
sf = 0; // Keep compiler quiet.
|
|
BX_PANIC(("get_SF: OSZAPC: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0xf0ffff;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<7);
|
|
BX_CPU_THIS_PTR eflags.val32 |= (!!sf)<<7;
|
|
return(sf);
|
|
|
|
case BX_LF_INDEX_OSZAP:
|
|
switch (BX_CPU_THIS_PTR oszap.instr) {
|
|
case BX_INSTR_INC8:
|
|
case BX_INSTR_DEC8:
|
|
sf = (BX_CPU_THIS_PTR oszap.result_8 >= 0x80);
|
|
break;
|
|
case BX_INSTR_INC16:
|
|
case BX_INSTR_DEC16:
|
|
sf = (BX_CPU_THIS_PTR oszap.result_16 >= 0x8000);
|
|
break;
|
|
case BX_INSTR_INC32:
|
|
case BX_INSTR_DEC32:
|
|
sf = (BX_CPU_THIS_PTR oszap.result_32 >= 0x80000000);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_INC64:
|
|
case BX_INSTR_DEC64:
|
|
sf = (BX_CPU_THIS_PTR oszap.result_64 >= BX_CONST64(0x8000000000000000));
|
|
break;
|
|
#endif
|
|
default:
|
|
sf = 0; // Keep compiler quiet.
|
|
BX_PANIC(("get_SF: OSZAP: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0xf0ffff;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<7);
|
|
BX_CPU_THIS_PTR eflags.val32 |= (!!sf)<<7;
|
|
return(sf);
|
|
|
|
default:
|
|
BX_PANIC(("get_SF: unknown case"));
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
bx_bool BX_CPU_C::get_OFLazy(void)
|
|
{
|
|
Bit8u op1_b7, op2_b7, result_b7;
|
|
Bit16u op1_b15, op2_b15, result_b15;
|
|
Bit32u op1_b31, op2_b31, result_b31;
|
|
#if BX_SUPPORT_X86_64
|
|
Bit64u op1_b63, op2_b63, result_b63;
|
|
#endif
|
|
unsigned of;
|
|
|
|
switch ( (BX_CPU_THIS_PTR lf_flags_status>>20) & 0x00000f ) {
|
|
case BX_LF_INDEX_OSZAPC:
|
|
switch (BX_CPU_THIS_PTR oszapc.instr) {
|
|
case BX_INSTR_ADD8:
|
|
case BX_INSTR_ADC8:
|
|
op1_b7 = BX_CPU_THIS_PTR oszapc.op1_8 & 0x80;
|
|
op2_b7 = BX_CPU_THIS_PTR oszapc.op2_8 & 0x80;
|
|
result_b7 = BX_CPU_THIS_PTR oszapc.result_8 & 0x80;
|
|
of = (op1_b7 == op2_b7) && (result_b7 ^ op2_b7);
|
|
break;
|
|
case BX_INSTR_ADD16:
|
|
case BX_INSTR_ADC16:
|
|
op1_b15 = BX_CPU_THIS_PTR oszapc.op1_16 & 0x8000;
|
|
op2_b15 = BX_CPU_THIS_PTR oszapc.op2_16 & 0x8000;
|
|
result_b15 = BX_CPU_THIS_PTR oszapc.result_16 & 0x8000;
|
|
of = (op1_b15 == op2_b15) && (result_b15 ^ op2_b15);
|
|
break;
|
|
case BX_INSTR_ADD32:
|
|
case BX_INSTR_ADC32:
|
|
op1_b31 = BX_CPU_THIS_PTR oszapc.op1_32 & 0x80000000;
|
|
op2_b31 = BX_CPU_THIS_PTR oszapc.op2_32 & 0x80000000;
|
|
result_b31 = BX_CPU_THIS_PTR oszapc.result_32 & 0x80000000;
|
|
of = (op1_b31 == op2_b31) && (result_b31 ^ op2_b31);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_ADD64:
|
|
case BX_INSTR_ADC64:
|
|
op1_b63 = BX_CPU_THIS_PTR oszapc.op1_64 & BX_CONST64(0x8000000000000000);
|
|
op2_b63 = BX_CPU_THIS_PTR oszapc.op2_64 & BX_CONST64(0x8000000000000000);
|
|
result_b63 = BX_CPU_THIS_PTR oszapc.result_64 & BX_CONST64(0x8000000000000000);
|
|
of = (op1_b63 == op2_b63) && (result_b63 ^ op2_b63);
|
|
break;
|
|
#endif
|
|
case BX_INSTR_SUB8:
|
|
case BX_INSTR_SBB8:
|
|
case BX_INSTR_COMPARE8:
|
|
op1_b7 = BX_CPU_THIS_PTR oszapc.op1_8 & 0x80;
|
|
op2_b7 = BX_CPU_THIS_PTR oszapc.op2_8 & 0x80;
|
|
result_b7 = BX_CPU_THIS_PTR oszapc.result_8 & 0x80;
|
|
of = (op1_b7 ^ op2_b7) && (op1_b7 ^ result_b7);
|
|
break;
|
|
case BX_INSTR_SUB16:
|
|
case BX_INSTR_SBB16:
|
|
case BX_INSTR_COMPARE16:
|
|
op1_b15 = BX_CPU_THIS_PTR oszapc.op1_16 & 0x8000;
|
|
op2_b15 = BX_CPU_THIS_PTR oszapc.op2_16 & 0x8000;
|
|
result_b15 = BX_CPU_THIS_PTR oszapc.result_16 & 0x8000;
|
|
of = (op1_b15 ^ op2_b15) && (op1_b15 ^ result_b15);
|
|
break;
|
|
case BX_INSTR_SUB32:
|
|
case BX_INSTR_SBB32:
|
|
case BX_INSTR_COMPARE32:
|
|
op1_b31 = BX_CPU_THIS_PTR oszapc.op1_32 & 0x80000000;
|
|
op2_b31 = BX_CPU_THIS_PTR oszapc.op2_32 & 0x80000000;
|
|
result_b31 = BX_CPU_THIS_PTR oszapc.result_32 & 0x80000000;
|
|
of = (op1_b31 ^ op2_b31) && (op1_b31 ^ result_b31);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_SUB64:
|
|
case BX_INSTR_SBB64:
|
|
case BX_INSTR_COMPARE64:
|
|
op1_b63 = BX_CPU_THIS_PTR oszapc.op1_64 & BX_CONST64(0x8000000000000000);
|
|
op2_b63 = BX_CPU_THIS_PTR oszapc.op2_64 & BX_CONST64(0x8000000000000000);
|
|
result_b63 = BX_CPU_THIS_PTR oszapc.result_64 & BX_CONST64(0x8000000000000000);
|
|
of = (op1_b63 ^ op2_b63) && (op1_b63 ^ result_b63);
|
|
break;
|
|
#endif
|
|
case BX_INSTR_NEG8:
|
|
of = (BX_CPU_THIS_PTR oszapc.result_8 == 0x80);
|
|
break;
|
|
case BX_INSTR_NEG16:
|
|
of = (BX_CPU_THIS_PTR oszapc.result_16 == 0x8000);
|
|
break;
|
|
case BX_INSTR_NEG32:
|
|
of = (BX_CPU_THIS_PTR oszapc.result_32 == 0x80000000);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_NEG64:
|
|
of = (BX_CPU_THIS_PTR oszapc.result_64 == BX_CONST64(0x8000000000000000));
|
|
break;
|
|
#endif
|
|
case BX_INSTR_LOGIC8:
|
|
case BX_INSTR_LOGIC16:
|
|
case BX_INSTR_LOGIC32:
|
|
case BX_INSTR_BITSCAN16:
|
|
case BX_INSTR_BITSCAN32:
|
|
case BX_INSTR_SAR8:
|
|
case BX_INSTR_SAR16:
|
|
case BX_INSTR_SAR32:
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_LOGIC64:
|
|
case BX_INSTR_BITSCAN64:
|
|
case BX_INSTR_SAR64:
|
|
#endif
|
|
of = 0;
|
|
break;
|
|
case BX_INSTR_SHR8:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_8 == 1)
|
|
of = (BX_CPU_THIS_PTR oszapc.op1_8 >= 0x80);
|
|
else
|
|
of = 0; /* undocumented, but hardware really does it */
|
|
break;
|
|
case BX_INSTR_SHR16:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_16 == 1)
|
|
of = (BX_CPU_THIS_PTR oszapc.op1_16 >= 0x8000);
|
|
else
|
|
of = 0; /* undocumented, but hardware really does it */
|
|
break;
|
|
case BX_INSTR_SHR32:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_32 == 1)
|
|
of = (BX_CPU_THIS_PTR oszapc.op1_32 >= 0x80000000);
|
|
else
|
|
of = 0; /* undocumented, but hardware really does it */
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_SHR64:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_64 == 1)
|
|
of = (BX_CPU_THIS_PTR oszapc.op1_64 >= BX_CONST64(0x8000000000000000));
|
|
else
|
|
of = 0; /* undocumented, but hardware really does it */
|
|
break;
|
|
#endif
|
|
case BX_INSTR_SHL8:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_8 == 1)
|
|
of = ((BX_CPU_THIS_PTR oszapc.op1_8 ^
|
|
BX_CPU_THIS_PTR oszapc.result_8) & 0x80) > 0;
|
|
else
|
|
of = (((BX_CPU_THIS_PTR oszapc.op1_8 <<
|
|
(BX_CPU_THIS_PTR oszapc.op2_8 - 1)) ^
|
|
BX_CPU_THIS_PTR oszapc.result_8) & 0x80) > 0;
|
|
break;
|
|
case BX_INSTR_SHL16:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_16 == 1)
|
|
of = ((BX_CPU_THIS_PTR oszapc.op1_16 ^
|
|
BX_CPU_THIS_PTR oszapc.result_16) & 0x8000) > 0;
|
|
else
|
|
of = (((BX_CPU_THIS_PTR oszapc.op1_16 <<
|
|
(BX_CPU_THIS_PTR oszapc.op2_16 - 1)) ^
|
|
BX_CPU_THIS_PTR oszapc.result_16) & 0x8000) > 0;
|
|
break;
|
|
case BX_INSTR_SHL32:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_32 == 1)
|
|
of = ((BX_CPU_THIS_PTR oszapc.op1_32 ^
|
|
BX_CPU_THIS_PTR oszapc.result_32) & 0x80000000) > 0;
|
|
else
|
|
of = (((BX_CPU_THIS_PTR oszapc.op1_32 <<
|
|
(BX_CPU_THIS_PTR oszapc.op2_32 - 1)) ^
|
|
BX_CPU_THIS_PTR oszapc.result_32) & 0x80000000) > 0;
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_SHL64:
|
|
if (BX_CPU_THIS_PTR oszapc.op2_64 == 1)
|
|
of = ((BX_CPU_THIS_PTR oszapc.op1_64 ^
|
|
BX_CPU_THIS_PTR oszapc.result_64) & BX_CONST64(0x8000000000000000)) > 0;
|
|
else
|
|
of = (((BX_CPU_THIS_PTR oszapc.op1_64 <<
|
|
(BX_CPU_THIS_PTR oszapc.op2_64 - 1)) ^
|
|
BX_CPU_THIS_PTR oszapc.result_64) & BX_CONST64(0x8000000000000000)) > 0;
|
|
break;
|
|
#endif
|
|
case BX_INSTR_MUL8:
|
|
of = (BX_CPU_THIS_PTR oszapc.op2_8 != 0);
|
|
break;
|
|
case BX_INSTR_MUL16:
|
|
of = (BX_CPU_THIS_PTR oszapc.op2_16 != 0);
|
|
break;
|
|
case BX_INSTR_MUL32:
|
|
of = (BX_CPU_THIS_PTR oszapc.op2_32 != 0);
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_MUL64:
|
|
of = (BX_CPU_THIS_PTR oszapc.op2_64 != 0);
|
|
break;
|
|
#endif
|
|
default:
|
|
of = 0; // Keep compiler happy.
|
|
BX_PANIC(("get_OF: OSZAPC: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0x0fffff;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<11);
|
|
BX_CPU_THIS_PTR eflags.val32 |= (!!of)<<11;
|
|
return(of);
|
|
|
|
case BX_LF_INDEX_OSZAP:
|
|
switch (BX_CPU_THIS_PTR oszap.instr) {
|
|
case BX_INSTR_INC8:
|
|
of = BX_CPU_THIS_PTR oszap.result_8 == 0x80;
|
|
break;
|
|
case BX_INSTR_INC16:
|
|
of = BX_CPU_THIS_PTR oszap.result_16 == 0x8000;
|
|
break;
|
|
case BX_INSTR_INC32:
|
|
of = BX_CPU_THIS_PTR oszap.result_32 == 0x80000000;
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_INC64:
|
|
of = BX_CPU_THIS_PTR oszap.result_64 == BX_CONST64(0x8000000000000000);
|
|
break;
|
|
#endif
|
|
case BX_INSTR_DEC8:
|
|
of = BX_CPU_THIS_PTR oszap.result_8 == 0x7F;
|
|
break;
|
|
case BX_INSTR_DEC16:
|
|
of = BX_CPU_THIS_PTR oszap.result_16 == 0x7FFF;
|
|
break;
|
|
case BX_INSTR_DEC32:
|
|
of = BX_CPU_THIS_PTR oszap.result_32 == 0x7FFFFFFF;
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_DEC64:
|
|
of = BX_CPU_THIS_PTR oszap.result_64 == BX_CONST64(0x7FFFFFFFFFFFFFFF);
|
|
break;
|
|
#endif
|
|
default:
|
|
of = 0; // Keep compiler happy.
|
|
BX_PANIC(("get_OF: OSZAP: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0x0fffff;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<11);
|
|
BX_CPU_THIS_PTR eflags.val32 |= (!!of)<<11;
|
|
return(of);
|
|
|
|
default:
|
|
BX_PANIC(("get_OF: unknown case"));
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
bx_bool BX_CPU_C::get_PFLazy(void)
|
|
{
|
|
unsigned pf;
|
|
|
|
switch ( (BX_CPU_THIS_PTR lf_flags_status>>4) & 0x00000f ) {
|
|
case BX_LF_INDEX_OSZAPC:
|
|
switch (BX_CPU_THIS_PTR oszapc.instr) {
|
|
case BX_INSTR_LOGIC8:
|
|
case BX_INSTR_ADD8:
|
|
case BX_INSTR_ADC8:
|
|
case BX_INSTR_SUB8:
|
|
case BX_INSTR_SBB8:
|
|
case BX_INSTR_COMPARE8:
|
|
case BX_INSTR_NEG8:
|
|
case BX_INSTR_SAR8:
|
|
case BX_INSTR_SHR8:
|
|
case BX_INSTR_SHL8:
|
|
pf = bx_parity_lookup[BX_CPU_THIS_PTR oszapc.result_8];
|
|
break;
|
|
case BX_INSTR_LOGIC16:
|
|
case BX_INSTR_ADD16:
|
|
case BX_INSTR_ADC16:
|
|
case BX_INSTR_SUB16:
|
|
case BX_INSTR_SBB16:
|
|
case BX_INSTR_COMPARE16:
|
|
case BX_INSTR_NEG16:
|
|
case BX_INSTR_SAR16:
|
|
case BX_INSTR_SHR16:
|
|
case BX_INSTR_SHL16:
|
|
case BX_INSTR_BITSCAN16:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszapc.result_16];
|
|
break;
|
|
case BX_INSTR_LOGIC32:
|
|
case BX_INSTR_ADD32:
|
|
case BX_INSTR_ADC32:
|
|
case BX_INSTR_SUB32:
|
|
case BX_INSTR_SBB32:
|
|
case BX_INSTR_COMPARE32:
|
|
case BX_INSTR_NEG32:
|
|
case BX_INSTR_SAR32:
|
|
case BX_INSTR_SHR32:
|
|
case BX_INSTR_SHL32:
|
|
case BX_INSTR_BITSCAN32:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszapc.result_32];
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_LOGIC64:
|
|
case BX_INSTR_ADD64:
|
|
case BX_INSTR_ADC64:
|
|
case BX_INSTR_SUB64:
|
|
case BX_INSTR_SBB64:
|
|
case BX_INSTR_COMPARE64:
|
|
case BX_INSTR_NEG64:
|
|
case BX_INSTR_SAR64:
|
|
case BX_INSTR_SHR64:
|
|
case BX_INSTR_SHL64:
|
|
case BX_INSTR_BITSCAN64:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszapc.result_64];
|
|
break;
|
|
#endif
|
|
case BX_INSTR_MUL8:
|
|
pf = bx_parity_lookup[BX_CPU_THIS_PTR oszapc.op1_8];
|
|
break;
|
|
case BX_INSTR_MUL16:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszapc.op1_16];
|
|
break;
|
|
case BX_INSTR_MUL32:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszapc.op1_16];
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_MUL64:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszapc.op1_64];
|
|
break;
|
|
#endif
|
|
default:
|
|
pf = 0; // Keep compiler quiet.
|
|
BX_PANIC(("get_PF: OSZAPC: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0xffff0f;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<2);
|
|
BX_CPU_THIS_PTR eflags.val32 |= (pf)<<2; // pf is always 0 or 1 here
|
|
return(pf);
|
|
|
|
case BX_LF_INDEX_OSZAP:
|
|
switch (BX_CPU_THIS_PTR oszap.instr) {
|
|
case BX_INSTR_INC8:
|
|
case BX_INSTR_DEC8:
|
|
pf = bx_parity_lookup[BX_CPU_THIS_PTR oszap.result_8];
|
|
break;
|
|
case BX_INSTR_INC16:
|
|
case BX_INSTR_DEC16:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszap.result_16];
|
|
break;
|
|
case BX_INSTR_INC32:
|
|
case BX_INSTR_DEC32:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszap.result_32];
|
|
break;
|
|
#if BX_SUPPORT_X86_64
|
|
case BX_INSTR_INC64:
|
|
case BX_INSTR_DEC64:
|
|
pf = bx_parity_lookup[(Bit8u) BX_CPU_THIS_PTR oszap.result_64];
|
|
break;
|
|
#endif
|
|
default:
|
|
pf = 0; // Keep compiler quiet.
|
|
BX_PANIC(("get_PF: OSZAP: unknown instr"));
|
|
}
|
|
BX_CPU_THIS_PTR lf_flags_status &= 0xffff0f;
|
|
BX_CPU_THIS_PTR eflags.val32 &= ~(1<<2);
|
|
BX_CPU_THIS_PTR eflags.val32 |= (pf)<<2; // pf is always 0 or 1 here
|
|
return(pf);
|
|
|
|
default:
|
|
BX_PANIC(("get_PF: unknown case"));
|
|
return(0);
|
|
}
|
|
}
|