592 lines
15 KiB
C++
592 lines
15 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001-2012 The Bochs Project
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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., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
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/////////////////////////////////////////////////////////////////////////
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#define NEED_CPU_REG_SHORTCUTS 1
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#include "bochs.h"
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#include "cpu.h"
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#define LOG_THIS BX_CPU_THIS_PTR
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_EbGbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u sum = op1 + op2;
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write_RMW_virtual_byte(sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_GbEbR(bxInstruction_c *i)
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{
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Bit32u op1 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u sum = op1 + op2;
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_GbEbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2 = read_virtual_byte(i->seg(), eaddr);
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Bit32u sum = op1 + op2;
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_ALIb(bxInstruction_c *i)
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{
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Bit32u op1 = AL;
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Bit32u op2 = i->Ib();
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Bit32u sum = op1 + op2;
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AL = sum;
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EbGbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u sum = op1 + op2 + getB_CF();
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write_RMW_virtual_byte(sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_GbEbR(bxInstruction_c *i)
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{
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Bit32u op1 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u sum = op1 + op2 + getB_CF();
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_GbEbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2 = read_virtual_byte(i->seg(), eaddr);
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Bit32u sum = op1 + op2 + getB_CF();
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_ALIb(bxInstruction_c *i)
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{
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Bit32u op1 = AL;
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Bit32u op2 = i->Ib();
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Bit32u sum = op1 + op2 + getB_CF();
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AL = sum;
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_EbGbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u diff_8 = op1_8 - (op2_8 + getB_CF());
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write_RMW_virtual_byte(diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_GbEbR(bxInstruction_c *i)
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{
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Bit32u op1_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u diff_8 = op1_8 - (op2_8 + getB_CF());
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_GbEbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2_8 = read_virtual_byte(i->seg(), eaddr);
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Bit32u diff_8 = op1_8 - (op2_8 + getB_CF());
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_ALIb(bxInstruction_c *i)
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{
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Bit32u op1_8 = AL;
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Bit32u op2_8 = i->Ib();
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Bit32u diff_8 = op1_8 - (op2_8 + getB_CF());
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AL = diff_8;
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_EbIbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2_8 = i->Ib();
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Bit32u diff_8 = op1_8 - (op2_8 + getB_CF());
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write_RMW_virtual_byte(diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_EbIbR(bxInstruction_c *i)
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{
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Bit32u op1_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u op2_8 = i->Ib();
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Bit32u diff_8 = op1_8 - (op2_8 + getB_CF());
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BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EbGbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u diff_8 = op1_8 - op2_8;
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write_RMW_virtual_byte(diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_GbEbR(bxInstruction_c *i)
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{
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Bit32u op1_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u diff_8 = op1_8 - op2_8;
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_GbEbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2_8 = read_virtual_byte(i->seg(), eaddr);
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Bit32u diff_8 = op1_8 - op2_8;
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), diff_8);
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_ALIb(bxInstruction_c *i)
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{
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Bit32u op1_8 = AL;
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Bit32u op2_8 = i->Ib();
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Bit32u diff_8 = op1_8 - op2_8;
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AL = diff_8;
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_EbGbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1_8 = read_virtual_byte(i->seg(), eaddr);
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Bit32u op2_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u diff_8 = op1_8 - op2_8;
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_GbEbR(bxInstruction_c *i)
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{
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Bit32u op1_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u diff_8 = op1_8 - op2_8;
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_GbEbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u op2_8 = read_virtual_byte(i->seg(), eaddr);
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Bit32u diff_8 = op1_8 - op2_8;
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_ALIb(bxInstruction_c *i)
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{
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Bit32u op1_8 = AL;
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Bit32u op2_8 = i->Ib();
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Bit32u diff_8 = op1_8 - op2_8;
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SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::XADD_EbGbM(bxInstruction_c *i)
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{
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/* XADD dst(r/m8), src(r8)
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* temp <-- src + dst | sum = op2 + op1
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* src <-- dst | op2 = op1
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* dst <-- tmp | op1 = sum
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*/
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u sum = op1 + op2;
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write_RMW_virtual_byte(sum);
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/* and write destination into source */
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), op1);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::XADD_EbGbR(bxInstruction_c *i)
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{
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/* XADD dst(r/m8), src(r8)
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* temp <-- src + dst | sum = op2 + op1
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* src <-- dst | op2 = op1
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* dst <-- tmp | op1 = sum
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*/
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Bit32u op1 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u op2 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
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Bit32u sum = op1 + op2;
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// and write destination into source
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// Note: if both op1 & op2 are registers, the last one written
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// should be the sum, as op1 & op2 may be the same register.
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// For example: XADD AL, AL
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BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), op1);
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BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_EbIbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2 = i->Ib();
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Bit32u sum = op1 + op2;
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write_RMW_virtual_byte(sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_EbIbR(bxInstruction_c *i)
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{
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Bit32u op1 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u op2 = i->Ib();
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Bit32u sum = op1 + op2;
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BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EbIbM(bxInstruction_c *i)
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{
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr);
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Bit32u op2 = i->Ib();
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Bit32u sum = op1 + op2 + getB_CF();
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write_RMW_virtual_byte(sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
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BX_NEXT_INSTR(i);
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}
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EbIbR(bxInstruction_c *i)
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{
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Bit32u op1 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
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Bit32u op2 = i->Ib();
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Bit32u sum = op1 + op2 + getB_CF();
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BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), sum);
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SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EbIbM(bxInstruction_c *i)
|
|
{
|
|
bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
|
|
|
|
Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
|
|
Bit32u op2_8 = i->Ib();
|
|
Bit32u diff_8 = op1_8 - op2_8;
|
|
|
|
write_RMW_virtual_byte(diff_8);
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EbIbR(bxInstruction_c *i)
|
|
{
|
|
Bit32u op1_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
|
|
Bit32u op2_8 = i->Ib();
|
|
Bit32u diff_8 = op1_8 - op2_8;
|
|
|
|
BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), diff_8);
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_EbIbM(bxInstruction_c *i)
|
|
{
|
|
bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
|
|
|
|
Bit32u op1_8 = read_virtual_byte(i->seg(), eaddr);
|
|
Bit32u op2_8 = i->Ib();
|
|
Bit32u diff_8 = op1_8 - op2_8;
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_EbIbR(bxInstruction_c *i)
|
|
{
|
|
Bit32u op1_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
|
|
Bit32u op2_8 = i->Ib();
|
|
Bit32u diff_8 = op1_8 - op2_8;
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::NEG_EbM(bxInstruction_c *i)
|
|
{
|
|
bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
|
|
|
|
Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
|
|
op1_8 = - (Bit8s)(op1_8);
|
|
write_RMW_virtual_byte(op1_8);
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(0, 0 - op1_8, op1_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::NEG_EbR(bxInstruction_c *i)
|
|
{
|
|
Bit32u op1_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
|
|
op1_8 = - (Bit8s)(op1_8);
|
|
BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), op1_8);
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(0, 0 - op1_8, op1_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::INC_EbM(bxInstruction_c *i)
|
|
{
|
|
bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
|
|
|
|
Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
|
|
op1_8++;
|
|
write_RMW_virtual_byte(op1_8);
|
|
|
|
SET_FLAGS_OSZAP_ADD_8(op1_8 - 1, 0, op1_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::INC_EbR(bxInstruction_c *i)
|
|
{
|
|
Bit32u op1_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
|
|
op1_8++;
|
|
BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), op1_8);
|
|
|
|
SET_FLAGS_OSZAP_ADD_8(op1_8 - 1, 0, op1_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::DEC_EbM(bxInstruction_c *i)
|
|
{
|
|
bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
|
|
|
|
Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
|
|
op1_8--;
|
|
write_RMW_virtual_byte(op1_8);
|
|
|
|
SET_FLAGS_OSZAP_SUB_8(op1_8 + 1, 0, op1_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::DEC_EbR(bxInstruction_c *i)
|
|
{
|
|
Bit32u op1_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
|
|
op1_8--;
|
|
BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), op1_8);
|
|
|
|
SET_FLAGS_OSZAP_SUB_8(op1_8 + 1, 0, op1_8);
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMPXCHG_EbGbM(bxInstruction_c *i)
|
|
{
|
|
bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
|
|
|
|
Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr);
|
|
Bit32u diff_8 = AL - op1_8;
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(AL, op1_8, diff_8);
|
|
|
|
if (diff_8 == 0) { // if accumulator == dest
|
|
// dest <-- src
|
|
Bit32u op2_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
|
|
write_RMW_virtual_byte(op2_8);
|
|
}
|
|
else {
|
|
// accumulator <-- dest
|
|
AL = op1_8;
|
|
}
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|
|
|
|
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMPXCHG_EbGbR(bxInstruction_c *i)
|
|
{
|
|
Bit32u op1_8 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
|
|
Bit32u diff_8 = AL - op1_8;
|
|
|
|
SET_FLAGS_OSZAPC_SUB_8(AL, op1_8, diff_8);
|
|
|
|
if (diff_8 == 0) { // if accumulator == dest
|
|
// dest <-- src
|
|
Bit32u op2_8 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
|
|
BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), op2_8);
|
|
}
|
|
else {
|
|
// accumulator <-- dest
|
|
AL = op1_8;
|
|
}
|
|
|
|
BX_NEXT_INSTR(i);
|
|
}
|