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[FAST486]

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The segment loading/storing MOV is always 16-bit and ignores OPSIZE.


svn path=/trunk/; revision=67463
This commit is contained in:
Aleksandar Andrejevic 2015-04-28 00:56:56 +00:00
parent f7561326df
commit 12c22c7748
1 changed files with 14 additions and 50 deletions
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64
reactos/lib/fast486/opcodes.c
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@ -3832,16 +3832,13 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeMovModrm)
FAST486_OPCODE_HANDLER(Fast486OpcodeMovStoreSeg)
{
BOOLEAN OperandSize, AddressSize;
BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
FAST486_MOD_REG_RM ModRegRm;
OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x8C);
TOGGLE_ADSIZE(AddressSize);
TOGGLE_OPSIZE(OperandSize);
/* Get the operands */
if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
@ -3857,20 +3854,10 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeMovStoreSeg)
return;
}
if (OperandSize)
{
Fast486WriteModrmDwordOperands(State,
&ModRegRm,
FALSE,
State->SegmentRegs[ModRegRm.Register].Selector);
}
else
{
Fast486WriteModrmWordOperands(State,
&ModRegRm,
FALSE,
State->SegmentRegs[ModRegRm.Register].Selector);
}
Fast486WriteModrmWordOperands(State,
&ModRegRm,
FALSE,
State->SegmentRegs[ModRegRm.Register].Selector);
}
FAST486_OPCODE_HANDLER(Fast486OpcodeLea)
@ -3921,16 +3908,14 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeLea)
FAST486_OPCODE_HANDLER(Fast486OpcodeMovLoadSeg)
{
BOOLEAN OperandSize, AddressSize;
BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
FAST486_MOD_REG_RM ModRegRm;
OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
USHORT Selector;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x8E);
TOGGLE_ADSIZE(AddressSize);
TOGGLE_OPSIZE(OperandSize);
/* Get the operands */
if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
@ -3947,37 +3932,16 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeMovLoadSeg)
return;
}
if (OperandSize)
if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Selector))
{
ULONG Selector;
if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Selector))
{
/* Exception occurred */
return;
}
if (!Fast486LoadSegment(State, ModRegRm.Register, LOWORD(Selector)))
{
/* Exception occurred */
return;
}
/* Exception occurred */
return;
}
else
if (!Fast486LoadSegment(State, ModRegRm.Register, Selector))
{
USHORT Selector;
if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Selector))
{
/* Exception occurred */
return;
}
if (!Fast486LoadSegment(State, ModRegRm.Register, Selector))
{
/* Exception occurred */
return;
}
/* Exception occurred */
return;
}
if ((INT)ModRegRm.Register == FAST486_REG_SS)