mirror of https://github.com/bochs-emu/Bochs
441 lines
8.2 KiB
C++
441 lines
8.2 KiB
C++
// 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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#include "bochs.h"
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void
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BX_CPU_C::XOR_EbGb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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/* op2 is a register, op2_addr is an index of a register */
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op2 = BX_READ_8BIT_REG(i->nnn);
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_RMW_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 ^ op2;
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/* now write result back to destination */
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if (i->mod == 0xc0) {
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BX_WRITE_8BIT_REG(i->rm, result);
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}
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else {
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write_RMW_virtual_byte(result);
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}
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_XOR8);
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}
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void
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BX_CPU_C::XOR_GbEb(BxInstruction_t *i)
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{
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Bit8u op1, op2, result;
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op1 = BX_READ_8BIT_REG(i->nnn);
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/* op2 is a register or memory reference */
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if (i->mod == 0xc0) {
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op2 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_virtual_byte(i->seg, i->rm_addr, &op2);
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}
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result = op1 ^ op2;
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/* now write result back to destination, which is a register */
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BX_WRITE_8BIT_REG(i->nnn, result);
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_XOR8);
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}
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void
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BX_CPU_C::XOR_ALIb(BxInstruction_t *i)
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{
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Bit8u op1, op2, sum;
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op1 = AL;
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op2 = i->Ib;
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sum = op1 ^ op2;
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/* now write sum back to destination, which is a register */
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AL = sum;
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SET_FLAGS_OSZAPC_8(op1, op2, sum, BX_INSTR_XOR8);
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}
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void
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BX_CPU_C::XOR_EbIb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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op2 = i->Ib;
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_RMW_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 ^ op2;
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/* now write result back to destination */
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if (i->mod == 0xc0) {
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BX_WRITE_8BIT_REG(i->rm, result);
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}
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else {
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write_RMW_virtual_byte(result);
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}
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_XOR8);
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}
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void
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BX_CPU_C::OR_EbIb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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op2 = i->Ib;
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_RMW_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 | op2;
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/* now write result back to destination */
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if (i->mod == 0xc0) {
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BX_WRITE_8BIT_REG(i->rm, result);
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}
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else {
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write_RMW_virtual_byte(result);
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}
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_OR8);
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}
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void
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BX_CPU_C::NOT_Eb(BxInstruction_t *i)
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{
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Bit8u op1_8, result_8;
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1_8 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_RMW_virtual_byte(i->seg, i->rm_addr, &op1_8);
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}
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result_8 = ~op1_8;
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/* now write result back to destination */
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if (i->mod == 0xc0) {
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BX_WRITE_8BIT_REG(i->rm, result_8);
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}
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else {
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write_RMW_virtual_byte(result_8);
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}
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}
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void
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BX_CPU_C::OR_EbGb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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/* op2 is a register, op2_addr is an index of a register */
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op2 = BX_READ_8BIT_REG(i->nnn);
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_RMW_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 | op2;
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/* now write result back to destination */
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if (i->mod == 0xc0) {
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BX_WRITE_8BIT_REG(i->rm, result);
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}
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else {
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write_RMW_virtual_byte(result);
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}
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_OR8);
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}
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void
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BX_CPU_C::OR_GbEb(BxInstruction_t *i)
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{
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Bit8u op1, op2, result;
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op1 = BX_READ_8BIT_REG(i->nnn);
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/* op2 is a register or memory reference */
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if (i->mod == 0xc0) {
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op2 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_virtual_byte(i->seg, i->rm_addr, &op2);
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}
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result = op1 | op2;
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/* now write result back to destination, which is a register */
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BX_WRITE_8BIT_REG(i->nnn, result);
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_OR8);
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}
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void
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BX_CPU_C::OR_ALIb(BxInstruction_t *i)
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{
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Bit8u op1, op2, sum;
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op1 = AL;
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op2 = i->Ib;
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sum = op1 | op2;
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/* now write sum back to destination, which is a register */
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AL = sum;
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SET_FLAGS_OSZAPC_8(op1, op2, sum, BX_INSTR_OR8);
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}
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void
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BX_CPU_C::AND_EbGb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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/* op2 is a register, op2_addr is an index of a register */
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op2 = BX_READ_8BIT_REG(i->nnn);
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_RMW_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 & op2;
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/* now write result back to destination */
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if (i->mod == 0xc0) {
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BX_WRITE_8BIT_REG(i->rm, result);
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}
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else {
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write_RMW_virtual_byte(result);
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}
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_AND8);
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}
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void
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BX_CPU_C::AND_GbEb(BxInstruction_t *i)
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{
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Bit8u op1, op2, result;
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op1 = BX_READ_8BIT_REG(i->nnn);
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/* op2 is a register or memory reference */
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if (i->mod == 0xc0) {
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op2 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_virtual_byte(i->seg, i->rm_addr, &op2);
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}
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result = op1 & op2;
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/* now write result back to destination, which is a register */
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BX_WRITE_8BIT_REG(i->nnn, result);
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_AND8);
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}
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void
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BX_CPU_C::AND_ALIb(BxInstruction_t *i)
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{
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Bit8u op1, op2, sum;
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op1 = AL;
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op2 = i->Ib;
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sum = op1 & op2;
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/* now write sum back to destination, which is a register */
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AL = sum;
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SET_FLAGS_OSZAPC_8(op1, op2, sum, BX_INSTR_AND8);
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}
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void
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BX_CPU_C::AND_EbIb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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op2 = i->Ib;
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_RMW_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 & op2;
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/* now write result back to destination */
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if (i->mod == 0xc0) {
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BX_WRITE_8BIT_REG(i->rm, result);
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}
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else {
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write_RMW_virtual_byte(result);
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}
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_AND8);
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}
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void
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BX_CPU_C::TEST_EbGb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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/* op2 is a register, op2_addr is an index of a register */
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op2 = BX_READ_8BIT_REG(i->nnn);
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 & op2;
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_TEST8);
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}
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void
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BX_CPU_C::TEST_ALIb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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/* op1 is the AL register */
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op1 = AL;
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/* op2 is imm8 */
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op2 = i->Ib;
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result = op1 & op2;
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_TEST8);
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}
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void
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BX_CPU_C::TEST_EbIb(BxInstruction_t *i)
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{
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Bit8u op2, op1, result;
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op2 = i->Ib;
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/* op1 is a register or memory reference */
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if (i->mod == 0xc0) {
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op1 = BX_READ_8BIT_REG(i->rm);
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}
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else {
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/* pointer, segment address pair */
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read_virtual_byte(i->seg, i->rm_addr, &op1);
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}
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result = op1 & op2;
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SET_FLAGS_OSZAPC_8(op1, op2, result, BX_INSTR_TEST8);
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}
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