Bochs/bochs/fpu/fpu_cmov.cc

160 lines
4.1 KiB
C++
Raw Normal View History

/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012 Stanislav Shwartsman
// Written by Stanislav Shwartsman [sshwarts at sourceforge net]
//
// 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 02110-1301 USA
//
/////////////////////////////////////////////////////////////////////////
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#include "cpu/cpu.h"
#define LOG_THIS BX_CPU_THIS_PTR
#if BX_SUPPORT_FPU
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVB_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (get_CF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVBE_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (get_CF() || get_ZF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVE_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (get_ZF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVNB_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (! get_CF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVNBE_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (! get_CF() && ! get_ZF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVNE_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (! get_ZF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVNU_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (! get_PF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOVU_ST0_STj(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm())) {
FPU_stack_underflow(0);
}
else {
if (get_PF())
BX_WRITE_FPU_REG(BX_READ_FPU_REG(i->rm()), 0);
}
BX_NEXT_INSTR(i);
}
#endif