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[FAST486]

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Implement the LSL instruction.
Remove instructions that don't exist on a 486 from the TODO list.


svn path=/branches/ntvdm/; revision=61309
This commit is contained in:
Aleksandar Andrejevic 2013-12-21 03:48:46 +00:00
parent 2a6c5d51be
commit 3dd500ab28
2 changed files with 136 additions and 5 deletions
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140
lib/fast486/extraops.c
View file

@ -40,11 +40,11 @@ Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
Fast486OpcodeGroup0F00,
Fast486OpcodeGroup0F01,
NULL, // TODO: OPCODE 0x02 NOT IMPLEMENTED
NULL, // TODO: OPCODE 0x03 NOT IMPLEMENTED
NULL, // TODO: OPCODE 0x04 NOT IMPLEMENTED
NULL, // TODO: OPCODE 0x05 NOT IMPLEMENTED
Fast486ExtOpcodeLsl,
NULL, // Invalid
NULL, // Invalid
Fast486ExtOpcodeClts,
NULL, // TODO: OPCODE 0x07 NOT IMPLEMENTED
NULL, // Invalid
NULL, // TODO: OPCODE 0x08 NOT IMPLEMENTED
NULL, // TODO: OPCODE 0x09 NOT IMPLEMENTED
NULL, // Invalid
@ -211,7 +211,7 @@ Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
Fast486ExtOpcodeBts,
Fast486ExtOpcodeShrd,
Fast486ExtOpcodeShrd,
NULL, // TODO: OPCODE 0xAE NOT IMPLEMENTED
NULL, // Invalid
Fast486ExtOpcodeImul,
Fast486ExtOpcodeCmpXchgByte,
Fast486ExtOpcodeCmpXchg,
@ -297,6 +297,136 @@ Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
/* PUBLIC FUNCTIONS ***********************************************************/
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLsl)
{
BOOLEAN OperandSize, AddressSize;
FAST486_MOD_REG_RM ModRegRm;
USHORT Selector;
ULONG Limit;
FAST486_GDT_ENTRY GdtEntry;
OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
if (!(State->ControlRegisters[FAST486_REG_CR0] & FAST486_CR0_PE)
|| State->Flags.Vm)
{
/* Not recognized */
Fast486Exception(State, FAST486_EXCEPTION_UD);
return FALSE;
}
NO_LOCK_PREFIX();
TOGGLE_OPSIZE(OperandSize);
TOGGLE_ADSIZE(AddressSize);
/* Get the operands */
if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
return FALSE;
}
if (OperandSize)
{
ULONG Value;
/* Read the value */
if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
{
/* Exception occurred */
return FALSE;
}
Selector = LOWORD(Value);
}
else
{
/* Read the value */
if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Selector))
{
/* Exception occurred */
return FALSE;
}
}
if (!(Selector & SEGMENT_TABLE_INDICATOR))
{
/* Check if the GDT contains the entry */
if (GET_SEGMENT_INDEX(Selector) >= (State->Gdtr.Size + 1))
{
State->Flags.Zf = FALSE;
return TRUE;
}
/* Read the GDT */
if (!Fast486ReadLinearMemory(State,
State->Gdtr.Address
+ GET_SEGMENT_INDEX(Selector),
&GdtEntry,
sizeof(GdtEntry)))
{
/* Exception occurred */
return FALSE;
}
}
else
{
/* Check if the LDT contains the entry */
if (GET_SEGMENT_INDEX(Selector) >= (State->Ldtr.Limit + 1))
{
State->Flags.Zf = FALSE;
return TRUE;
}
/* Read the LDT */
if (!Fast486ReadLinearMemory(State,
State->Ldtr.Base
+ GET_SEGMENT_INDEX(Selector),
&GdtEntry,
sizeof(GdtEntry)))
{
/* Exception occurred */
return FALSE;
}
}
/* Privilege check */
if (((GET_SEGMENT_RPL(Selector) > GdtEntry.Dpl))
|| (Fast486GetCurrentPrivLevel(State) > GdtEntry.Dpl))
{
State->Flags.Zf = FALSE;
return TRUE;
}
/* Calculate the limit */
Limit = GdtEntry.Limit | (GdtEntry.LimitHigh << 16);
if (GdtEntry.Granularity) Limit <<= 12;
/* Set ZF */
State->Flags.Zf = TRUE;
if (OperandSize)
{
/* Read the value */
if (!Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, Limit))
{
/* Exception occurred */
return FALSE;
}
}
else
{
/* Read the value */
if (!Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, LOWORD(Limit)))
{
/* Exception occurred */
return FALSE;
}
}
return TRUE;
}
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeClts)
{
NO_LOCK_PREFIX();

1
lib/fast486/extraops.h
View file

@ -26,6 +26,7 @@
/* DEFINES ********************************************************************/
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLsl);
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeClts);
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeStoreControlReg);
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeStoreDebugReg);