370 lines
9.6 KiB
C++
370 lines
9.6 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::MOV_EwIwM(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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write_virtual_word(i->seg(), eaddr, i->Iw());
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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::MOV_EwIwR(bxInstruction_c *i)
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{
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BX_WRITE_16BIT_REG(i->dst(), i->Iw());
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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::MOV_EwGwM(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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write_virtual_word(i->seg(), eaddr, BX_READ_16BIT_REG(i->src()));
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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::MOV_GwEwR(bxInstruction_c *i)
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{
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::MOV_GwEwM(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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Bit16u val16 = read_virtual_word(i->seg(), eaddr);
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BX_WRITE_16BIT_REG(i->dst(), val16);
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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::MOV_EwSwR(bxInstruction_c *i)
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{
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/* Illegal to use nonexisting segments */
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if (i->src() >= 6) {
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BX_INFO(("MOV_EwSw: using of nonexisting segment register %d", i->src()));
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exception(BX_UD_EXCEPTION, 0);
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}
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Bit16u seg_reg = BX_CPU_THIS_PTR sregs[i->src()].selector.value;
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if (i->os32L()) {
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BX_WRITE_32BIT_REGZ(i->dst(), seg_reg);
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}
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else {
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BX_WRITE_16BIT_REG(i->dst(), seg_reg);
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}
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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::MOV_EwSwM(bxInstruction_c *i)
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{
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/* Illegal to use nonexisting segments */
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if (i->src() >= 6) {
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BX_INFO(("MOV_EwSw: using of nonexisting segment register %d", i->src()));
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exception(BX_UD_EXCEPTION, 0);
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}
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit16u seg_reg = BX_CPU_THIS_PTR sregs[i->src()].selector.value;
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write_virtual_word(i->seg(), eaddr, seg_reg);
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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::MOV_SwEw(bxInstruction_c *i)
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{
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Bit16u op2_16;
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/* Attempt to load CS or nonexisting segment register */
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if (i->dst() >= 6 || i->dst() == BX_SEG_REG_CS) {
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BX_INFO(("MOV_EwSw: can't use this segment register %d", i->dst()));
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exception(BX_UD_EXCEPTION, 0);
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}
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if (i->modC0()) {
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op2_16 = BX_READ_16BIT_REG(i->src());
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}
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else {
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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/* pointer, segment address pair */
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op2_16 = read_virtual_word(i->seg(), eaddr);
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}
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load_seg_reg(&BX_CPU_THIS_PTR sregs[i->dst()], op2_16);
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if (i->dst() == BX_SEG_REG_SS) {
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// MOV SS inhibits interrupts, debug exceptions and single-step
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// trap exceptions until the execution boundary following the
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// next instruction is reached.
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// Same code as POP_SS()
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inhibit_interrupts(BX_INHIBIT_INTERRUPTS_BY_MOVSS);
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}
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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::LEA_GwM(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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BX_WRITE_16BIT_REG(i->dst(), (Bit16u) eaddr);
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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::MOV_AXOd(bxInstruction_c *i)
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{
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AX = read_virtual_word_32(i->seg(), i->Id());
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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::MOV_OdAX(bxInstruction_c *i)
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{
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write_virtual_word_32(i->seg(), i->Id(), AX);
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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::MOVZX_GwEbM(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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Bit8u op2_8 = read_virtual_byte(i->seg(), eaddr);
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/* zero extend byte op2 into word op1 */
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BX_WRITE_16BIT_REG(i->dst(), (Bit16u) op2_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::MOVZX_GwEbR(bxInstruction_c *i)
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{
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Bit8u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL());
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/* zero extend byte op2 into word op1 */
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BX_WRITE_16BIT_REG(i->dst(), (Bit16u) op2_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::MOVSX_GwEbM(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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Bit8u op2_8 = read_virtual_byte(i->seg(), eaddr);
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/* sign extend byte op2 into word op1 */
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BX_WRITE_16BIT_REG(i->dst(), (Bit8s) op2_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::MOVSX_GwEbR(bxInstruction_c *i)
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{
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Bit8u op2_8 = BX_READ_8BIT_REGx(i->src(),i->extend8bitL());
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/* sign extend byte op2 into word op1 */
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BX_WRITE_16BIT_REG(i->dst(), (Bit8s) op2_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::XCHG_EwGwM(bxInstruction_c *i)
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{
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Bit16u op1_16, op2_16;
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bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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op1_16 = read_RMW_virtual_word(i->seg(), eaddr);
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op2_16 = BX_READ_16BIT_REG(i->src());
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write_RMW_virtual_word(op2_16);
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BX_WRITE_16BIT_REG(i->src(), op1_16);
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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::XCHG_EwGwR(bxInstruction_c *i)
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{
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Bit16u op1_16, op2_16;
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#if BX_DEBUGGER
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// Note for mortals: the instruction to trigger this is "xchgw %bx,%bx"
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if (bx_dbg.magic_break_enabled && (i->src() == 3) && (i->dst() == 3))
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{
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BX_CPU_THIS_PTR magic_break = 1;
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BX_NEXT_INSTR(i);
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}
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#endif
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op1_16 = BX_READ_16BIT_REG(i->dst());
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op2_16 = BX_READ_16BIT_REG(i->src());
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BX_WRITE_16BIT_REG(i->src(), op1_16);
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BX_WRITE_16BIT_REG(i->dst(), op2_16);
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BX_NEXT_INSTR(i);
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}
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// Note: CMOV accesses a memory source operand (read), regardless
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// of whether condition is true or not. Thus, exceptions may
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// occur even if the MOV does not take place.
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BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMOVO_GwEwR(bxInstruction_c *i)
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{
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if (get_OF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNO_GwEwR(bxInstruction_c *i)
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{
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if (!get_OF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVB_GwEwR(bxInstruction_c *i)
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{
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if (get_CF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNB_GwEwR(bxInstruction_c *i)
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{
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if (!get_CF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVZ_GwEwR(bxInstruction_c *i)
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{
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if (get_ZF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNZ_GwEwR(bxInstruction_c *i)
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{
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if (!get_ZF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVBE_GwEwR(bxInstruction_c *i)
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{
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if (get_CF() || get_ZF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNBE_GwEwR(bxInstruction_c *i)
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{
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if (! (get_CF() || get_ZF()))
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVS_GwEwR(bxInstruction_c *i)
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{
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if (get_SF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNS_GwEwR(bxInstruction_c *i)
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{
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if (!get_SF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVP_GwEwR(bxInstruction_c *i)
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{
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if (get_PF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNP_GwEwR(bxInstruction_c *i)
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{
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if (!get_PF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVL_GwEwR(bxInstruction_c *i)
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{
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if (getB_SF() != getB_OF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNL_GwEwR(bxInstruction_c *i)
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{
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if (getB_SF() == getB_OF())
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVLE_GwEwR(bxInstruction_c *i)
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{
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if (get_ZF() || (getB_SF() != getB_OF()))
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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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::CMOVNLE_GwEwR(bxInstruction_c *i)
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{
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if (! get_ZF() && (getB_SF() == getB_OF()))
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BX_WRITE_16BIT_REG(i->dst(), BX_READ_16BIT_REG(i->src()));
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BX_NEXT_INSTR(i);
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}
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