/* INCLUDES *******************************************************************/
-// #define WIN32_NO_STATUS
-// #define _INC_WINDOWS
#include <windef.h>
// #define NDEBUG
Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
{
NULL, // TODO: OPCODE 0x00 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x01 NOT IMPLEMENTED
+ Fast486OpcodeGroup0F01,
NULL, // TODO: OPCODE 0x02 NOT IMPLEMENTED
NULL, // TODO: OPCODE 0x03 NOT IMPLEMENTED
NULL, // TODO: OPCODE 0x04 NOT IMPLEMENTED
NULL, // TODO: OPCODE 0xBD NOT IMPLEMENTED
NULL, // TODO: OPCODE 0xBE NOT IMPLEMENTED
NULL, // TODO: OPCODE 0xBF NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xC0 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xC1 NOT IMPLEMENTED
+ Fast486ExtOpcodeXaddByte,
+ Fast486ExtOpcodeXadd,
NULL, // Invalid
NULL, // Invalid
NULL, // Invalid
State->Flags.Of = ((Accumulator & SIGN_FLAG_BYTE) != (Destination & SIGN_FLAG_BYTE))
&& ((Accumulator & SIGN_FLAG_BYTE) != (Result & SIGN_FLAG_BYTE));
State->Flags.Af = (Accumulator & 0x0F) < (Destination & 0x0F);
- State->Flags.Zf = (Result == 0) ? TRUE : FALSE;
- State->Flags.Sf = (Result & SIGN_FLAG_BYTE) ? TRUE : FALSE;
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_BYTE) != 0);
State->Flags.Pf = Fast486CalculateParity(Result);
if (State->Flags.Zf)
State->Flags.Of = ((Accumulator & SIGN_FLAG_LONG) != (Destination & SIGN_FLAG_LONG))
&& ((Accumulator & SIGN_FLAG_LONG) != (Result & SIGN_FLAG_LONG));
State->Flags.Af = (Accumulator & 0x0F) < (Destination & 0x0F);
- State->Flags.Zf = (Result == 0) ? TRUE : FALSE;
- State->Flags.Sf = (Result & SIGN_FLAG_LONG) ? TRUE : FALSE;
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_LONG) != 0);
State->Flags.Pf = Fast486CalculateParity(Result);
if (State->Flags.Zf)
State->Flags.Of = ((Accumulator & SIGN_FLAG_WORD) != (Destination & SIGN_FLAG_WORD))
&& ((Accumulator & SIGN_FLAG_WORD) != (Result & SIGN_FLAG_WORD));
State->Flags.Af = (Accumulator & 0x0F) < (Destination & 0x0F);
- State->Flags.Zf = (Result == 0) ? TRUE : FALSE;
- State->Flags.Sf = (Result & SIGN_FLAG_WORD) ? TRUE : FALSE;
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_WORD) != 0);
State->Flags.Pf = Fast486CalculateParity(Result);
if (State->Flags.Zf)
return Fast486WriteModrmByteOperands(State, &ModRegRm, FALSE, Value);
}
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeXaddByte)
+{
+ UCHAR Source, Destination, Result;
+ FAST486_MOD_REG_RM ModRegRm;
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xC0);
+
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ if (!Fast486ReadModrmByteOperands(State,
+ &ModRegRm,
+ &Source,
+ &Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = Source + Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = (Result < Source) && (Result < Destination);
+ State->Flags.Of = ((Source & SIGN_FLAG_BYTE) == (Destination & SIGN_FLAG_BYTE))
+ && ((Source & SIGN_FLAG_BYTE) != (Result & SIGN_FLAG_BYTE));
+ State->Flags.Af = ((((Source & 0x0F) + (Destination & 0x0F)) & 0x10) != 0);
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_BYTE) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ /* Write the sum to the destination */
+ if (!Fast486WriteModrmByteOperands(State, &ModRegRm, FALSE, Result))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Write the old value of the destination to the source */
+ if (!Fast486WriteModrmByteOperands(State, &ModRegRm, TRUE, Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeXadd)
+{
+ FAST486_MOD_REG_RM ModRegRm;
+ BOOLEAN OperandSize, AddressSize;
+
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xC1);
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ TOGGLE_ADSIZE(AddressSize);
+ TOGGLE_OPSIZE(OperandSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Check the operand size */
+ if (OperandSize)
+ {
+ ULONG Source, Destination, Result;
+
+ if (!Fast486ReadModrmDwordOperands(State,
+ &ModRegRm,
+ &Source,
+ &Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = Source + Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = (Result < Source) && (Result < Destination);
+ State->Flags.Of = ((Source & SIGN_FLAG_LONG) == (Destination & SIGN_FLAG_LONG))
+ && ((Source & SIGN_FLAG_LONG) != (Result & SIGN_FLAG_LONG));
+ State->Flags.Af = ((((Source & 0x0F) + (Destination & 0x0F)) & 0x10) != 0);
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_LONG) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ /* Write the sum to the destination */
+ if (!Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Result))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Write the old value of the destination to the source */
+ if (!Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+ }
+ else
+ {
+ USHORT Source, Destination, Result;
+
+ if (!Fast486ReadModrmWordOperands(State,
+ &ModRegRm,
+ &Source,
+ &Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = Source + Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = (Result < Source) && (Result < Destination);
+ State->Flags.Of = ((Source & SIGN_FLAG_WORD) == (Destination & SIGN_FLAG_WORD))
+ && ((Source & SIGN_FLAG_WORD) != (Result & SIGN_FLAG_WORD));
+ State->Flags.Af = ((((Source & 0x0F) + (Destination & 0x0F)) & 0x10) != 0);
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_WORD) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ /* Write the sum to the destination */
+ if (!Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Result))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Write the old value of the destination to the source */
+ if (!Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBswap)
{
PUCHAR Pointer;