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/////////////////////////////////////////////////////////////////////////
// $Id: segment_ctrl.cc,v 1.6 2001/10/03 13:10:37 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#define LOG_THIS BX_CPU_THIS_PTR
void
BX_CPU_C::LES_GvMp(BxInstruction_t *i)
{
if (i->mod == 0xc0) {
// (BW) NT seems to use this when booting.
BX_INFO(("invalid use of LES, must use memory reference!"));
UndefinedOpcode(i);
}
#if BX_CPU_LEVEL > 2
if (i->os_32) {
Bit16u es;
Bit32u reg_32;
read_virtual_dword(i->seg, i->rm_addr, ®_32);
read_virtual_word(i->seg, i->rm_addr + 4, &es);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_ES], es);
BX_WRITE_32BIT_REG(i->nnn, reg_32);
}
else
#endif /* BX_CPU_LEVEL > 2 */
{ /* 16 bit mode */
Bit16u reg_16, es;
read_virtual_word(i->seg, i->rm_addr, ®_16);
read_virtual_word(i->seg, i->rm_addr + 2, &es);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_ES], es);
BX_WRITE_16BIT_REG(i->nnn, reg_16);
}
}
void
BX_CPU_C::LDS_GvMp(BxInstruction_t *i)
{
if (i->mod == 0xc0) {
BX_PANIC(("invalid use of LDS, must use memory reference!"));
UndefinedOpcode(i);
}
#if BX_CPU_LEVEL > 2
if (i->os_32) {
Bit16u ds;
Bit32u reg_32;
read_virtual_dword(i->seg, i->rm_addr, ®_32);
read_virtual_word(i->seg, i->rm_addr + 4, &ds);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS], ds);
BX_WRITE_32BIT_REG(i->nnn, reg_32);
}
else
#endif /* BX_CPU_LEVEL > 2 */
{ /* 16 bit mode */
Bit16u reg_16, ds;
read_virtual_word(i->seg, i->rm_addr, ®_16);
read_virtual_word(i->seg, i->rm_addr + 2, &ds);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS], ds);
BX_WRITE_16BIT_REG(i->nnn, reg_16);
}
}
void
BX_CPU_C::LFS_GvMp(BxInstruction_t *i)
{
#if BX_CPU_LEVEL < 3
BX_PANIC(("lfs_gvmp: not supported on 8086"));
#else /* 386+ */
if (i->mod == 0xc0) {
BX_PANIC(("invalid use of LFS, must use memory reference!"));
UndefinedOpcode(i);
}
if (i->os_32) {
Bit32u reg_32;
Bit16u fs;
read_virtual_dword(i->seg, i->rm_addr, ®_32);
read_virtual_word(i->seg, i->rm_addr + 4, &fs);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS], fs);
BX_WRITE_32BIT_REG(i->nnn, reg_32);
}
else { /* 16 bit operand size */
Bit16u reg_16;
Bit16u fs;
read_virtual_word(i->seg, i->rm_addr, ®_16);
read_virtual_word(i->seg, i->rm_addr + 2, &fs);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS], fs);
BX_WRITE_16BIT_REG(i->nnn, reg_16);
}
#endif
}
void
BX_CPU_C::LGS_GvMp(BxInstruction_t *i)
{
#if BX_CPU_LEVEL < 3
BX_PANIC(("lgs_gvmp: not supported on 8086"));
#else /* 386+ */
if (i->mod == 0xc0) {
BX_PANIC(("invalid use of LGS, must use memory reference!"));
UndefinedOpcode(i);
}
if (i->os_32) {
Bit32u reg_32;
Bit16u gs;
read_virtual_dword(i->seg, i->rm_addr, ®_32);
read_virtual_word(i->seg, i->rm_addr + 4, &gs);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS], gs);
BX_WRITE_32BIT_REG(i->nnn, reg_32);
}
else { /* 16 bit operand size */
Bit16u reg_16;
Bit16u gs;
read_virtual_word(i->seg, i->rm_addr, ®_16);
read_virtual_word(i->seg, i->rm_addr + 2, &gs);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS], gs);
BX_WRITE_16BIT_REG(i->nnn, reg_16);
}
#endif
}
void
BX_CPU_C::LSS_GvMp(BxInstruction_t *i)
{
#if BX_CPU_LEVEL < 3
BX_PANIC(("lss_gvmp: not supported on 8086"));
#else /* 386+ */
if (i->mod == 0xc0) {
BX_PANIC(("invalid use of LSS, must use memory reference!"));
UndefinedOpcode(i);
}
if (i->os_32) {
Bit32u reg_32;
Bit16u ss_raw;
read_virtual_dword(i->seg, i->rm_addr, ®_32);
read_virtual_word(i->seg, i->rm_addr + 4, &ss_raw);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS], ss_raw);
BX_WRITE_32BIT_REG(i->nnn, reg_32);
}
else { /* 16 bit operand size */
Bit16u reg_16;
Bit16u ss_raw;
read_virtual_word(i->seg, i->rm_addr, ®_16);
read_virtual_word(i->seg, i->rm_addr + 2, &ss_raw);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS], ss_raw);
BX_WRITE_16BIT_REG(i->nnn, reg_16);
}
#endif
}
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