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[SOFT386]

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Implement MOV for segment registers.


svn path=/branches/ntvdm/; revision=60398
This commit is contained in:
Aleksandar Andrejevic 2013-09-28 03:01:07 +00:00
parent 0c91026f75
commit 6db4f4e558
1 changed files with 104 additions and 6 deletions
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110
lib/soft386/opcodes.c
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@ -4076,10 +4076,54 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeMovModrm)
SOFT386_OPCODE_HANDLER(Soft386OpcodeMovStoreSeg)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
BOOLEAN OperandSize, AddressSize;
SOFT386_MOD_REG_RM ModRegRm;
return FALSE;
OperandSize = AddressSize = State->SegmentRegs[SOFT386_REG_CS].Size;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x8C);
if (State->PrefixFlags & SOFT386_PREFIX_ADSIZE)
{
/* The ADSIZE prefix toggles the address size */
AddressSize = !AddressSize;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the operand size */
OperandSize = !OperandSize;
}
/* Get the operands */
if (!Soft386ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
return FALSE;
}
if (ModRegRm.Register >= SOFT386_NUM_SEG_REGS)
{
/* Invalid */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (OperandSize)
{
return Soft386WriteModrmDwordOperands(State,
&ModRegRm,
FALSE,
State->SegmentRegs[ModRegRm.Register].Selector);
}
else
{
return Soft386WriteModrmWordOperands(State,
&ModRegRm,
FALSE,
State->SegmentRegs[ModRegRm.Register].Selector);
}
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeLea)
@ -4139,10 +4183,64 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeLea)
SOFT386_OPCODE_HANDLER(Soft386OpcodeMovLoadSeg)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
BOOLEAN OperandSize, AddressSize;
SOFT386_MOD_REG_RM ModRegRm;
return FALSE;
OperandSize = AddressSize = State->SegmentRegs[SOFT386_REG_CS].Size;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x8E);
if (State->PrefixFlags & SOFT386_PREFIX_ADSIZE)
{
/* The ADSIZE prefix toggles the address size */
AddressSize = !AddressSize;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the operand size */
OperandSize = !OperandSize;
}
/* Get the operands */
if (!Soft386ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
return FALSE;
}
if (ModRegRm.Register >= SOFT386_NUM_SEG_REGS)
{
/* Invalid */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (OperandSize)
{
ULONG Dummy, Selector;
if (!Soft386ReadModrmDwordOperands(State, &ModRegRm, &Dummy, &Selector))
{
/* Exception occurred */
return FALSE;
}
return Soft386LoadSegment(State, ModRegRm.Register, LOWORD(Selector));
}
else
{
USHORT Dummy, Selector;
if (!Soft386ReadModrmWordOperands(State, &ModRegRm, &Dummy, &Selector))
{
/* Exception occurred */
return FALSE;
}
return Soft386LoadSegment(State, ModRegRm.Register, Selector);
}
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeCwde)