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/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001-2018 The Bochs Project
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
/////////////////////////////////////////////////////////////////////////
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#include "cpu.h"
#define LOG_THIS BX_CPU_THIS_PTR
void BX_CPP_AttrRegparmN(1) BX_CPU_C::MUL_EAXEdR(bxInstruction_c *i)
{
Bit32u op1_32 = EAX;
Bit32u op2_32 = BX_READ_32BIT_REG(i->src());
Bit64u product_64 = ((Bit64u) op1_32) * ((Bit64u) op2_32);
Bit32u product_32l = GET32L(product_64);
Bit32u product_32h = GET32H(product_64);
/* now write product back to destination */
RAX = product_32l;
RDX = product_32h;
/* set EFLAGS */
SET_FLAGS_OSZAPC_LOGIC_32(product_32l);
if(product_32h != 0)
{
BX_CPU_THIS_PTR oszapc.assert_flags_OxxxxC();
}
BX_NEXT_INSTR(i);
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::IMUL_EAXEdR(bxInstruction_c *i)
{
Bit32s op1_32 = EAX;
Bit32s op2_32 = BX_READ_32BIT_REG(i->src());
Bit64s product_64 = ((Bit64s) op1_32) * ((Bit64s) op2_32);
Bit32u product_32l = GET32L(product_64);
Bit32u product_32h = GET32H(product_64);
/* now write product back to destination */
RAX = product_32l;
RDX = product_32h;
/* set eflags:
* IMUL r/m32: condition for clearing CF & OF:
* EDX:EAX = sign-extend of EAX
*/
SET_FLAGS_OSZAPC_LOGIC_32(product_32l);
if(product_64 != (Bit32s)product_64)
{
BX_CPU_THIS_PTR oszapc.assert_flags_OxxxxC();
}
BX_NEXT_INSTR(i);
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::DIV_EAXEdR(bxInstruction_c *i)
{
Bit32u op2_32 = BX_READ_32BIT_REG(i->src());
if (op2_32 == 0) {
exception(BX_DE_EXCEPTION, 0);
}
Bit64u op1_64 = GET64_FROM_HI32_LO32(EDX, EAX);
Bit64u quotient_64 = op1_64 / op2_32;
Bit32u remainder_32 = (Bit32u) (op1_64 % op2_32);
Bit32u quotient_32l = (Bit32u) (quotient_64 & 0xFFFFFFFF);
if (quotient_64 != quotient_32l)
{
exception(BX_DE_EXCEPTION, 0);
}
/* set EFLAGS:
* DIV affects the following flags: O,S,Z,A,P,C are undefined
*/
/* now write quotient back to destination */
RAX = quotient_32l;
RDX = remainder_32;
BX_NEXT_INSTR(i);
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::IDIV_EAXEdR(bxInstruction_c *i)
{
Bit64s op1_64 = GET64_FROM_HI32_LO32(EDX, EAX);
/* check MIN_INT case */
if (op1_64 == ((Bit64s)BX_CONST64(0x8000000000000000)))
exception(BX_DE_EXCEPTION, 0);
Bit32s op2_32 = BX_READ_32BIT_REG(i->src());
if (op2_32 == 0)
exception(BX_DE_EXCEPTION, 0);
Bit64s quotient_64 = op1_64 / op2_32;
Bit32s remainder_32 = (Bit32s) (op1_64 % op2_32);
Bit32s quotient_32l = (Bit32s) (quotient_64 & 0xFFFFFFFF);
if (quotient_64 != quotient_32l)
{
exception(BX_DE_EXCEPTION, 0);
}
/* set EFLAGS:
* IDIV affects the following flags: O,S,Z,A,P,C are undefined
*/
/* now write quotient back to destination */
RAX = (Bit32u) quotient_32l;
RDX = (Bit32u) remainder_32;
BX_NEXT_INSTR(i);
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::IMUL_GdEdIdR(bxInstruction_c *i)
{
Bit32s op2_32 = BX_READ_32BIT_REG(i->src());
Bit32s op3_32 = i->Id();
Bit64s product_64 = ((Bit64s) op2_32) * ((Bit64s) op3_32);
Bit32u product_32 = (Bit32u)(product_64 & 0xFFFFFFFF);
/* now write product back to destination */
BX_WRITE_32BIT_REGZ(i->dst(), product_32);
/* set eflags:
* IMUL r32,r/m32,imm32: condition for clearing CF & OF:
* result exactly fits within r32
*/
SET_FLAGS_OSZAPC_LOGIC_32(product_32);
if(product_64 != (Bit32s) product_64)
{
BX_CPU_THIS_PTR oszapc.assert_flags_OxxxxC();
}
BX_NEXT_INSTR(i);
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::IMUL_GdEdR(bxInstruction_c *i)
{
Bit32s op1_32 = BX_READ_32BIT_REG(i->dst());
Bit32s op2_32 = BX_READ_32BIT_REG(i->src());
Bit64s product_64 = ((Bit64s) op1_32) * ((Bit64s) op2_32);
Bit32u product_32 = (Bit32u)(product_64 & 0xFFFFFFFF);
/* now write product back to destination */
BX_WRITE_32BIT_REGZ(i->dst(), product_32);
/* set eflags:
* IMUL r32,r/m32: condition for clearing CF & OF:
* result exactly fits within r32
*/
SET_FLAGS_OSZAPC_LOGIC_32(product_32);
if(product_64 != (Bit32s) product_64)
{
BX_CPU_THIS_PTR oszapc.assert_flags_OxxxxC();
}
BX_NEXT_INSTR(i);
}
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