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[FAST486]

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Implement the BOUND instruction.


svn path=/branches/ntvdm/; revision=61205
This commit is contained in:
Aleksandar Andrejevic 2013-12-03 01:30:15 +00:00
parent 2064d10bad
commit 978c08c15c
1 changed files with 95 additions and 3 deletions
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98
lib/fast486/opcodes.c
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@ -3524,10 +3524,102 @@ FAST486_OPCODE_HANDLER(Fast486OpcodePopAll)
FAST486_OPCODE_HANDLER(Fast486OpcodeBound) FAST486_OPCODE_HANDLER(Fast486OpcodeBound)
{ {
// TODO: NOT IMPLEMENTED BOOLEAN OperandSize, AddressSize;
UNIMPLEMENTED; FAST486_MOD_REG_RM ModRegRm;
FAST486_SEG_REGS Segment = FAST486_REG_DS;
return FALSE; OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
NO_LOCK_PREFIX();
TOGGLE_OPSIZE(OperandSize);
TOGGLE_ADSIZE(AddressSize);
if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
return FALSE;
}
if (!ModRegRm.Memory)
{
/* Invalid */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return FALSE;
}
/* Check for the segment override */
if (State->PrefixFlags & FAST486_PREFIX_SEG)
{
/* Use the override segment instead */
Segment = State->SegmentOverride;
}
if (OperandSize)
{
LONG Index, LowerBound, UpperBound;
/* Read the operands */
if (!Fast486ReadModrmDwordOperands(State,
&ModRegRm,
(PULONG)&Index,
(PULONG)&LowerBound))
{
/* Exception occurred */
return FALSE;
}
if (!Fast486ReadMemory(State,
Segment,
ModRegRm.MemoryAddress + sizeof(ULONG),
FALSE,
&UpperBound,
sizeof(ULONG)))
{
/* Exception occurred */
return FALSE;
}
if ((Index < LowerBound) || (Index > UpperBound))
{
/* Out of bounds */
Fast486Exception(State, FAST486_EXCEPTION_BR);
return FALSE;
}
}
else
{
SHORT Index, LowerBound, UpperBound;
/* Read the operands */
if (!Fast486ReadModrmWordOperands(State,
&ModRegRm,
(PUSHORT)&Index,
(PUSHORT)&LowerBound))
{
/* Exception occurred */
return FALSE;
}
if (!Fast486ReadMemory(State,
Segment,
ModRegRm.MemoryAddress + sizeof(USHORT),
FALSE,
&UpperBound,
sizeof(USHORT)))
{
/* Exception occurred */
return FALSE;
}
if ((Index < LowerBound) || (Index > UpperBound))
{
/* Out of bounds */
Fast486Exception(State, FAST486_EXCEPTION_BR);
return FALSE;
}
}
return TRUE;
} }
FAST486_OPCODE_HANDLER(Fast486OpcodeArpl) FAST486_OPCODE_HANDLER(Fast486OpcodeArpl)