NULL, // Invalid
NULL, // Invalid
NULL, // Invalid
- NULL, // TODO: OPCODE 0x10 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x11 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x12 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x13 NOT IMPLEMENTED
+ NULL, // Invalid
+ NULL, // Invalid
+ NULL, // Invalid
+ NULL, // Invalid
NULL, // Invalid
NULL, // Invalid
NULL, // Invalid
Fast486ExtOpcodePopFs,
NULL, // Invalid
Fast486ExtOpcodeBitTest,
- NULL, // TODO: OPCODE 0xA4 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xA5 NOT IMPLEMENTED
+ Fast486ExtOpcodeShld,
+ Fast486ExtOpcodeShld,
NULL, // Invalid
NULL, // Invalid
Fast486ExtOpcodePushGs,
Fast486ExtOpcodePopGs,
NULL, // Invalid
Fast486ExtOpcodeBts,
- NULL, // TODO: OPCODE 0xAC NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAD NOT IMPLEMENTED
+ Fast486ExtOpcodeShrd,
+ Fast486ExtOpcodeShrd,
NULL, // TODO: OPCODE 0xAE NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAF NOT IMPLEMENTED
+ Fast486ExtOpcodeImul,
Fast486ExtOpcodeCmpXchgByte,
Fast486ExtOpcodeCmpXchg,
NULL, // TODO: OPCODE 0xB2 NOT IMPLEMENTED
Fast486ExtOpcodeBtr,
- NULL, // TODO: OPCODE 0xB4 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB5 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB6 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB7 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB8 NOT IMPLEMENTED
+ Fast486ExtOpcodeLfsLgs,
+ Fast486ExtOpcodeLfsLgs,
+ Fast486ExtOpcodeMovzxByte,
+ Fast486ExtOpcodeMovzxWord,
+ NULL, // Invalid
Fast486OpcodeGroup0FB9,
Fast486OpcodeGroup0FBA,
Fast486ExtOpcodeBtc,
Fast486Exception(State, FAST486_EXCEPTION_UD);
return FALSE;
}
-
+
if (ModRegRm.Register != 0)
{
/* CR2 and CR3 and are stored in array indexes 1 and 2 */
return TRUE;
}
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeShld)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ UCHAR Count;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Make sure this is the right instruction */
+ ASSERT((Opcode & 0xFE) == 0xA4);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ if (Opcode == 0xA4)
+ {
+ /* Fetch the count */
+ if (!Fast486FetchByte(State, &Count))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+ }
+ else
+ {
+ /* The count is in CL */
+ Count = State->GeneralRegs[FAST486_REG_ECX].LowByte;
+ }
+
+ /* Normalize the count */
+ if (OperandSize) Count &= 0x1F;
+ else Count &= 0x0F;
+
+ /* Do nothing if the count is zero */
+ if (Count == 0) return TRUE;
+
+ if (OperandSize)
+ {
+ ULONG Source, Destination, Result;
+
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = (Destination << Count) | (Source >> (32 - Count));
+
+ /* Update flags */
+ State->Flags.Cf = (Destination >> (32 - Count)) & 1;
+ if (Count == 1) State->Flags.Of = (Result & SIGN_FLAG_LONG)
+ != (Destination & SIGN_FLAG_LONG);
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_LONG) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ /* Write back the result */
+ return Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Result);
+ }
+ else
+ {
+ USHORT Source, Destination, Result;
+
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = (Destination << Count) | (Source >> (16 - Count));
+
+ /* Update flags */
+ State->Flags.Cf = (Destination >> (16 - Count)) & 1;
+ if (Count == 1) State->Flags.Of = (Result & SIGN_FLAG_WORD)
+ != (Destination & SIGN_FLAG_WORD);
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_WORD) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ /* Write back the result */
+ return Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Result);
+ }
+}
+
FAST486_OPCODE_HANDLER(Fast486ExtOpcodePushGs)
{
/* Call the internal API */
return TRUE;
}
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeShrd)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ UCHAR Count;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Make sure this is the right instruction */
+ ASSERT((Opcode & 0xFE) == 0xAC);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ if (Opcode == 0xAC)
+ {
+ /* Fetch the count */
+ if (!Fast486FetchByte(State, &Count))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+ }
+ else
+ {
+ /* The count is in CL */
+ Count = State->GeneralRegs[FAST486_REG_ECX].LowByte;
+ }
+
+ /* Normalize the count */
+ if (OperandSize) Count &= 0x1F;
+ else Count &= 0x0F;
+
+ /* Do nothing if the count is zero */
+ if (Count == 0) return TRUE;
+
+ if (OperandSize)
+ {
+ ULONG Source, Destination, Result;
+
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = (Destination >> Count) | (Source << (32 - Count));
+
+ /* Update flags */
+ State->Flags.Cf = (Destination >> (Count - 1)) & 1;
+ if (Count == 1) State->Flags.Of = (Result & SIGN_FLAG_LONG)
+ != (Destination & SIGN_FLAG_LONG);
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_LONG) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ /* Write back the result */
+ return Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Result);
+ }
+ else
+ {
+ USHORT Source, Destination, Result;
+
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = (Destination >> Count) | (Source << (16 - Count));
+
+ /* Update flags */
+ State->Flags.Cf = (Result >> (Count - 1)) & 1;
+ if (Count == 1) State->Flags.Of = (Result & SIGN_FLAG_WORD)
+ != (Destination & SIGN_FLAG_WORD);
+ State->Flags.Zf = (Result == 0);
+ State->Flags.Sf = ((Result & SIGN_FLAG_WORD) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ /* Write back the result */
+ return Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Result);
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeImul)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ if (OperandSize)
+ {
+ LONG Source, Destination;
+ LONGLONG Result;
+
+ /* Read the operands */
+ if (!Fast486ReadModrmDwordOperands(State,
+ &ModRegRm,
+ (PULONG)&Destination,
+ (PULONG)&Source))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = (LONGLONG)Source * (LONGLONG)Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = State->Flags.Of = ((Result < -2147483648LL) || (Result > 2147483647LL));
+
+ /* Write back the result */
+ return Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, (ULONG)((LONG)Result));
+ }
+ else
+ {
+ SHORT Source, Destination;
+ LONG Result;
+
+ /* Read the operands */
+ if (!Fast486ReadModrmWordOperands(State,
+ &ModRegRm,
+ (PUSHORT)&Destination,
+ (PUSHORT)&Source))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Calculate the result */
+ Result = (LONG)Source * (LONG)Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = State->Flags.Of = ((Result < -32768) || (Result > 32767));
+
+ /* Write back the result */
+ return Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, (USHORT)((SHORT)Result));
+ }
+}
+
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeCmpXchgByte)
{
FAST486_MOD_REG_RM ModRegRm;
return TRUE;
}
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLfsLgs)
+{
+ UCHAR FarPointer[6];
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ /* Make sure this is the right instruction */
+ ASSERT((Opcode & 0xFE) == 0xB4);
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ if (!ModRegRm.Memory)
+ {
+ /* Invalid */
+ Fast486Exception(State, FAST486_EXCEPTION_UD);
+ return FALSE;
+ }
+
+ if (!Fast486ReadMemory(State,
+ (State->PrefixFlags & FAST486_PREFIX_SEG)
+ ? State->SegmentOverride : FAST486_REG_DS,
+ ModRegRm.MemoryAddress,
+ FALSE,
+ FarPointer,
+ OperandSize ? 6 : 4))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ if (OperandSize)
+ {
+ ULONG Offset = *((PULONG)FarPointer);
+ USHORT Segment = *((PUSHORT)&FarPointer[sizeof(ULONG)]);
+
+ /* Set the register to the offset */
+ State->GeneralRegs[ModRegRm.Register].Long = Offset;
+
+ /* Load the segment */
+ return Fast486LoadSegment(State,
+ (Opcode == 0xB4)
+ ? FAST486_REG_FS : FAST486_REG_GS,
+ Segment);
+ }
+ else
+ {
+ USHORT Offset = *((PUSHORT)FarPointer);
+ USHORT Segment = *((PUSHORT)&FarPointer[sizeof(USHORT)]);
+
+ /* Set the register to the offset */
+ State->GeneralRegs[ModRegRm.Register].LowWord = Offset;
+
+ /* Load the segment */
+ return Fast486LoadSegment(State,
+ (Opcode == 0xB4)
+ ? FAST486_REG_FS : FAST486_REG_GS,
+ Segment);
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeMovzxByte)
+{
+ UCHAR Dummy, Value;
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xB6);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Read the operands */
+ if (!Fast486ReadModrmByteOperands(State, &ModRegRm, &Dummy, &Value))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Write back the zero-extended value */
+ return Fast486WriteModrmDwordOperands(State,
+ &ModRegRm,
+ TRUE,
+ (ULONG)Value);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeMovzxWord)
+{
+ USHORT Dummy, Value;
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xB7);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Read the operands */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, &Dummy, &Value))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ /* Write back the zero-extended value */
+ return Fast486WriteModrmDwordOperands(State,
+ &ModRegRm,
+ TRUE,
+ (ULONG)Value);
+}
+
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBtc)
{
BOOLEAN OperandSize, AddressSize;
if (Jump)
{
- /* Move the instruction pointer */
+ /* Move the instruction pointer */
State->InstPtr.Long += Offset;
}
/* Exception occurred */
return FALSE;
}
-
+
/* Calculate the result */
Result = Source + Destination;
/* Exception occurred */
return FALSE;
}
-
+
/* Calculate the result */
Result = Source + Destination;
projects / reactos.git / blobdiff