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[SOFT386]

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Implement opcode groups 0xC0 and 0xC1, also using Soft386RotateOperation.
Remove two unnecessary blank lines.


svn path=/branches/ntvdm/; revision=60459
This commit is contained in:
Aleksandar Andrejevic 2013-09-29 22:23:01 +00:00
parent e365b99113
commit 6605a6f215
1 changed files with 115 additions and 6 deletions
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121
lib/soft386/opgroups.c
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@ -368,14 +368,125 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeGroup8F)
SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupC0)
{
UNIMPLEMENTED;
return FALSE; // TODO: NOT IMPLEMENTED
UCHAR Dummy, Value, Count;
SOFT386_MOD_REG_RM ModRegRm;
BOOLEAN AddressSize = State->SegmentRegs[SOFT386_REG_CS].Size;
if (State->PrefixFlags & SOFT386_PREFIX_ADSIZE)
{
/* The ADSIZE prefix toggles the size */
AddressSize = !AddressSize;
}
if (!Soft386ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
return FALSE;
}
/* Read the operands */
if (!Soft386ReadModrmByteOperands(State, &ModRegRm, &Dummy, &Value))
{
/* Exception occurred */
return FALSE;
}
/* Fetch the count */
if (!Soft386FetchByte(State, &Count))
{
/* Exception occurred */
return FALSE;
}
/* Calculate the result */
Value = LOBYTE(Soft386RotateOperation(State,
ModRegRm.Register,
Value,
8,
Count));
/* Write back the result */
return Soft386WriteModrmByteOperands(State,
&ModRegRm,
FALSE,
Value);
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupC1)
{
UNIMPLEMENTED;
return FALSE; // TODO: NOT IMPLEMENTED
UCHAR Count;
SOFT386_MOD_REG_RM ModRegRm;
BOOLEAN OperandSize, AddressSize;
OperandSize = AddressSize = State->SegmentRegs[SOFT386_REG_CS].Size;
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
OperandSize = !OperandSize;
}
if (State->PrefixFlags & SOFT386_PREFIX_ADSIZE)
{
/* The ADSIZE prefix toggles the size */
AddressSize = !AddressSize;
}
if (!Soft386ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
return FALSE;
}
/* Fetch the count */
if (!Soft386FetchByte(State, &Count))
{
/* Exception occurred */
return FALSE;
}
if (OperandSize)
{
ULONG Dummy, Value;
/* Read the operands */
if (!Soft386ReadModrmDwordOperands(State, &ModRegRm, &Dummy, &Value))
{
/* Exception occurred */
return FALSE;
}
/* Calculate the result */
Value = Soft386RotateOperation(State,
ModRegRm.Register,
Value,
32,
Count);
/* Write back the result */
return Soft386WriteModrmDwordOperands(State, &ModRegRm, FALSE, Value);
}
else
{
USHORT Dummy, Value;
/* Read the operands */
if (!Soft386ReadModrmWordOperands(State, &ModRegRm, &Dummy, &Value))
{
/* Exception occurred */
return FALSE;
}
/* Calculate the result */
Value = LOWORD(Soft386RotateOperation(State,
ModRegRm.Register,
Value,
16,
Count));
/* Write back the result */
return Soft386WriteModrmWordOperands(State, &ModRegRm, FALSE, Value);
}
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupC6)
@ -632,7 +743,6 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupD3)
OperandSize = !OperandSize;
}
if (State->PrefixFlags & SOFT386_PREFIX_ADSIZE)
{
/* The ADSIZE prefix toggles the size */
@ -687,7 +797,6 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupD3)
/* Write back the result */
return Soft386WriteModrmWordOperands(State, &ModRegRm, FALSE, Value);
}
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupF6)