* Fast486 386/486 CPU Emulation Library
* extraops.c
*
- * Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ * Copyright (C) 2014 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
/* INCLUDES *******************************************************************/
-// #define WIN32_NO_STATUS
-// #define _INC_WINDOWS
#include <windef.h>
// #define NDEBUG
#include <fast486.h>
#include "opcodes.h"
#include "common.h"
+#include "opgroups.h"
#include "extraops.h"
/* PUBLIC VARIABLES ***********************************************************/
FAST486_OPCODE_HANDLER_PROC
Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
{
- NULL, // TODO: OPCODE 0x00 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x01 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x02 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x03 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x04 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x05 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x06 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x07 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x08 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x09 NOT IMPLEMENTED
- NULL, // Invalid
- NULL, // Reserved (UD1)
- NULL, // Invalid
- 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
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // TODO: OPCODE 0x20 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x21 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x22 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x23 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x24 NOT IMPLEMENTED
- NULL, // Invalid
- NULL, // TODO: OPCODE 0x26 NOT IMPLEMENTED
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // TODO: OPCODE 0x30 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x31 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0x32 NOT IMPLEMENTED
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
+ Fast486ExtOpcodeGroup0F00, /* 0x00 - 0x01 */
+ Fast486ExtOpcodeGroup0F01,
+ Fast486ExtOpcodeLar, /* 0x02 */
+ Fast486ExtOpcodeLsl, /* 0x03 */
+ Fast486ExtOpcodeInvalid, /* 0x04 - 0x05 */ // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeClts, /* 0x06 */
+ Fast486ExtOpcodeInvalid, /* 0x07 */ // Invalid
+ Fast486ExtOpcodeUnimplemented, // TODO: OPCODE 0x08 NOT IMPLEMENTED
+ Fast486ExtOpcodeUnimplemented, // TODO: OPCODE 0x09 NOT IMPLEMENTED
+ Fast486ExtOpcodeInvalid, /* 0x0A */ // Invalid
+ Fast486ExtOpcode0F0B, /* 0x0B */ // Reserved (UD2)
+ Fast486ExtOpcodeInvalid, /* 0x0C - 0x1F */ // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeStoreControlReg, /* 0x20 */
+ Fast486ExtOpcodeStoreDebugReg, /* 0x21 */
+ Fast486ExtOpcodeLoadControlReg, /* 0x22 */
+ Fast486ExtOpcodeLoadDebugReg, /* 0x23 */
+ Fast486ExtOpcodeUnimplemented, // TODO: OPCODE 0x24 NOT IMPLEMENTED
+ Fast486ExtOpcodeInvalid, /* 0x25 */ // Invalid
+ Fast486ExtOpcodeUnimplemented, // TODO: OPCODE 0x26 NOT IMPLEMENTED
+ Fast486ExtOpcodeInvalid, /* 0x27 - 0x7F */ // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeConditionalJmp, /* 0x80 - 0x8F */
Fast486ExtOpcodeConditionalJmp,
Fast486ExtOpcodeConditionalJmp,
Fast486ExtOpcodeConditionalJmp,
Fast486ExtOpcodeConditionalJmp,
Fast486ExtOpcodeConditionalJmp,
Fast486ExtOpcodeConditionalJmp,
- Fast486ExtOpcodeConditionalJmp,
- Fast486ExtOpcodeConditionalSet,
+ Fast486ExtOpcodeConditionalSet, /* 0x90 - 0x9F */
Fast486ExtOpcodeConditionalSet,
Fast486ExtOpcodeConditionalSet,
Fast486ExtOpcodeConditionalSet,
Fast486ExtOpcodeConditionalSet,
Fast486ExtOpcodeConditionalSet,
Fast486ExtOpcodeConditionalSet,
- NULL, // TODO: OPCODE 0xA0 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xA1 NOT IMPLEMENTED
- NULL, // Invalid
- NULL, // TODO: OPCODE 0xA3 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xA4 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xA5 NOT IMPLEMENTED
- NULL, // Invalid
- NULL, // Invalid
- NULL, // TODO: OPCODE 0xA8 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xA9 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAA NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAB NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAC NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAD NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAE NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xAF NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB0 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB1 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB2 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xB3 NOT IMPLEMENTED
- 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
- NULL, // TODO: OPCODE 0xB9 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xBA NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xBB NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xBC 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
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // TODO: OPCODE 0xC8 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xC9 NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xCA NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xCB NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xCC NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xCD NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xCE NOT IMPLEMENTED
- NULL, // TODO: OPCODE 0xCF NOT IMPLEMENTED
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
- NULL, // Invalid
+ Fast486ExtOpcodePushFs, /* 0xA0 */
+ Fast486ExtOpcodePopFs, /* 0xA1 */
+ Fast486ExtOpcodeInvalid, /* 0xA2 */ // Invalid
+ Fast486ExtOpcodeBitTest, /* 0xA3 */
+ Fast486ExtOpcodeShld, /* 0xA4 - 0xA5 */
+ Fast486ExtOpcodeShld,
+ Fast486ExtOpcodeInvalid, /* 0xA6 - 0xA7 */ // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodePushGs, /* 0xA8 - 0xA9 */
+ Fast486ExtOpcodePopGs,
+ Fast486ExtOpcodeInvalid, /* 0xAA */ // Invalid
+ Fast486ExtOpcodeBts, /* 0xAB */
+ Fast486ExtOpcodeShrd, /* 0xAC - 0xAD */
+ Fast486ExtOpcodeShrd,
+ Fast486ExtOpcodeInvalid, /* 0xAE */ // Invalid
+ Fast486ExtOpcodeImul, /* 0xAF */
+ Fast486ExtOpcodeCmpXchgByte, /* 0xB0 */
+ Fast486ExtOpcodeCmpXchg, /* 0xB1 */
+ Fast486ExtOpcodeLss, /* 0xB2 */
+ Fast486ExtOpcodeBtr, /* 0xB3 */
+ Fast486ExtOpcodeLfsLgs, /* 0xB4 - 0xB5 */
+ Fast486ExtOpcodeLfsLgs,
+ Fast486ExtOpcodeMovzxByte, /* 0xB6 - 0xB7 */
+ Fast486ExtOpcodeMovzxWord,
+ Fast486ExtOpcodeInvalid, /* 0xB8 */ // Invalid
+ Fast486ExtOpcodeGroup0FB9, /* 0xB9 */
+ Fast486ExtOpcodeGroup0FBA, /* 0xBA */
+ Fast486ExtOpcodeBtc, /* 0xBB */
+ Fast486ExtOpcodeBsf, /* 0xBC */
+ Fast486ExtOpcodeBsr, /* 0xBD */
+ Fast486ExtOpcodeMovsxByte, /* 0xBE - 0xBF */
+ Fast486ExtOpcodeMovsxWord,
+ Fast486ExtOpcodeXaddByte, /* 0xC0 - 0xC1 */
+ Fast486ExtOpcodeXadd,
+ Fast486ExtOpcodeInvalid, /* 0xC2 - 0xC7 */ // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeBswap, /* 0xC8 - 0xCF */
+ Fast486ExtOpcodeBswap,
+ Fast486ExtOpcodeBswap,
+ Fast486ExtOpcodeBswap,
+ Fast486ExtOpcodeBswap,
+ Fast486ExtOpcodeBswap,
+ Fast486ExtOpcodeBswap,
+ Fast486ExtOpcodeBswap,
+ Fast486ExtOpcodeInvalid, /* 0xD0 - 0xFF */ // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
+ Fast486ExtOpcodeInvalid, // Invalid
};
-/* PUBLIC FUNCTIONS ***********************************************************/
+/* PUBLIC FUNCTIONS ***********************************************************/
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeInvalid)
+{
+ DPRINT1("FAST486 -- Extended opcode 0x%02X is INVALID!\n", Opcode);
+ Fast486Exception(State, FAST486_EXCEPTION_UD);
+ return;
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeUnimplemented)
+{
+ DPRINT1("FAST486 -- Extended opcode 0x%02X is UNIMPLEMENTED\n", Opcode);
+ // Fast486Exception(State, FAST486_EXCEPTION_UD);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcode0F0B)
+{
+ /* Reserved opcode (UD2) */
+ Fast486Exception(State, FAST486_EXCEPTION_UD);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLar)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ BOOLEAN Valid;
+ USHORT Selector;
+ FAST486_GDT_ENTRY GdtEntry;
+ DWORD AccessRights;
+
+ 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;
+ }
+
+ NO_LOCK_PREFIX();
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (OperandSize)
+ {
+ ULONG Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ Selector = LOWORD(Value);
+ }
+ else
+ {
+ /* Read the value */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Selector))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+
+ if (!Fast486ReadDescriptorEntry(State, Selector, &Valid, &GdtEntry))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (!Valid)
+ {
+ State->Flags.Zf = FALSE;
+ return;
+ }
+
+ /* Privilege check */
+ if (((GET_SEGMENT_RPL(Selector) > GdtEntry.Dpl))
+ || (Fast486GetCurrentPrivLevel(State) > GdtEntry.Dpl))
+ {
+ State->Flags.Zf = FALSE;
+ return;
+ }
+
+ /* Set ZF */
+ State->Flags.Zf = TRUE;
+
+ /* Get the access rights */
+ AccessRights = ((PDWORD)&GdtEntry)[1] & 0x00F0FF00;
+
+ /* Return the access rights */
+ if (OperandSize) Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, AccessRights);
+ else Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, LOWORD(AccessRights));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLsl)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ BOOLEAN Valid;
+ 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;
+ }
+
+ NO_LOCK_PREFIX();
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (OperandSize)
+ {
+ ULONG Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ Selector = LOWORD(Value);
+ }
+ else
+ {
+ /* Read the value */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Selector))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+
+ if (!Fast486ReadDescriptorEntry(State, Selector, &Valid, &GdtEntry))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (!Valid)
+ {
+ State->Flags.Zf = FALSE;
+ return;
+ }
+
+ /* Privilege check */
+ if (((GET_SEGMENT_RPL(Selector) > GdtEntry.Dpl))
+ || (Fast486GetCurrentPrivLevel(State) > GdtEntry.Dpl))
+ {
+ State->Flags.Zf = FALSE;
+ return;
+ }
+
+ /* Calculate the limit */
+ Limit = GdtEntry.Limit | (GdtEntry.LimitHigh << 16);
+
+ if (GdtEntry.Granularity)
+ {
+ Limit <<= 12;
+ Limit |= 0x00000FFF;
+ }
+
+ /* Set ZF */
+ State->Flags.Zf = TRUE;
+
+ /* Return the limit */
+ if (OperandSize) Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, Limit);
+ else Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, LOWORD(Limit));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeClts)
+{
+ NO_LOCK_PREFIX();
+
+ /* The current privilege level must be zero */
+ if (Fast486GetCurrentPrivLevel(State) != 0)
+ {
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+
+ /* Clear the task switch bit */
+ State->ControlRegisters[FAST486_REG_CR0] &= ~FAST486_CR0_TS;
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeStoreControlReg)
+{
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ NO_LOCK_PREFIX();
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* The current privilege level must be zero */
+ if (Fast486GetCurrentPrivLevel(State) != 0)
+ {
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+
+ if ((ModRegRm.Register == 1) || (ModRegRm.Register > 3))
+ {
+ /* CR1, CR4, CR5, CR6 and CR7 don't exist */
+ Fast486Exception(State, FAST486_EXCEPTION_UD);
+ return;
+ }
+
+ if (ModRegRm.Register != 0)
+ {
+ /* CR2 and CR3 and are stored in array indexes 1 and 2 */
+ ModRegRm.Register--;
+ }
+
+ /* Store the value of the control register */
+ State->GeneralRegs[ModRegRm.SecondRegister].Long = State->ControlRegisters[ModRegRm.Register];
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeStoreDebugReg)
+{
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ NO_LOCK_PREFIX();
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* The current privilege level must be zero */
+ if (Fast486GetCurrentPrivLevel(State) != 0)
+ {
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+
+ if ((ModRegRm.Register == 6) || (ModRegRm.Register == 7))
+ {
+ /* DR6 and DR7 are aliases to DR4 and DR5 */
+ ModRegRm.Register -= 2;
+ }
+
+ if (State->DebugRegisters[FAST486_REG_DR5] & FAST486_DR5_GD)
+ {
+ /* Disallow access to debug registers */
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+
+ /* Store the value of the debug register */
+ State->GeneralRegs[ModRegRm.SecondRegister].Long = State->DebugRegisters[ModRegRm.Register];
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLoadControlReg)
+{
+ ULONG Value;
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ NO_LOCK_PREFIX();
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* The current privilege level must be zero */
+ if (Fast486GetCurrentPrivLevel(State) != 0)
+ {
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+
+ if ((ModRegRm.Register == 1) || (ModRegRm.Register > 3))
+ {
+ /* CR1, CR4, CR5, CR6 and CR7 don't exist */
+ Fast486Exception(State, FAST486_EXCEPTION_UD);
+ return;
+ }
+
+ if (ModRegRm.Register != 0)
+ {
+ /* CR2 and CR3 and are stored in array indexes 1 and 2 */
+ ModRegRm.Register--;
+ }
+
+ /* Get the value */
+ Value = State->GeneralRegs[ModRegRm.SecondRegister].Long;
+
+ if (ModRegRm.Register == (INT)FAST486_REG_CR0)
+ {
+ /* CR0 checks */
+
+ if (((Value & (FAST486_CR0_PG | FAST486_CR0_PE)) == FAST486_CR0_PG)
+ || ((Value & (FAST486_CR0_CD | FAST486_CR0_NW)) == FAST486_CR0_NW))
+ {
+ /* Invalid value */
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+ }
+
+#ifndef FAST486_NO_PREFETCH
+ /* Changing CR0 or CR3 can interfere with prefetching (because of paging) */
+ State->PrefetchValid = FALSE;
+#endif
+
+ if (State->Tlb && (ModRegRm.Register == (INT)FAST486_REG_CR3))
+ {
+ /* Flush the TLB */
+ RtlZeroMemory(State->Tlb, NUM_TLB_ENTRIES * sizeof(ULONG));
+ }
+
+ /* Load a value to the control register */
+ State->ControlRegisters[ModRegRm.Register] = Value;
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLoadDebugReg)
+{
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ NO_LOCK_PREFIX();
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* The current privilege level must be zero */
+ if (Fast486GetCurrentPrivLevel(State) != 0)
+ {
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+
+ if ((ModRegRm.Register == 6) || (ModRegRm.Register == 7))
+ {
+ /* DR6 and DR7 are aliases to DR4 and DR5 */
+ ModRegRm.Register -= 2;
+ }
+
+ if (State->DebugRegisters[FAST486_REG_DR5] & FAST486_DR5_GD)
+ {
+ /* Disallow access to debug registers */
+ Fast486Exception(State, FAST486_EXCEPTION_GP);
+ return;
+ }
+
+ /* Load a value to the debug register */
+ State->DebugRegisters[ModRegRm.Register] = State->GeneralRegs[ModRegRm.SecondRegister].Long;
+
+ if (ModRegRm.Register == (INT)FAST486_REG_DR4)
+ {
+ /* The reserved bits are 1 */
+ State->DebugRegisters[ModRegRm.Register] |= FAST486_DR4_RESERVED;
+ }
+ else if (ModRegRm.Register == (INT)FAST486_REG_DR5)
+ {
+ /* The reserved bits are 0 */
+ State->DebugRegisters[ModRegRm.Register] &= ~FAST486_DR5_RESERVED;
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePushFs)
+{
+ /* Call the internal API */
+ Fast486StackPush(State, State->SegmentRegs[FAST486_REG_FS].Selector);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePopFs)
+{
+ ULONG NewSelector;
+
+ if (!Fast486StackPop(State, &NewSelector))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Call the internal API */
+ Fast486LoadSegment(State, FAST486_REG_FS, LOWORD(NewSelector));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBitTest)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ UINT DataSize;
+ ULONG BitNumber;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the number of bits */
+ if (OperandSize) DataSize = 32;
+ else DataSize = 16;
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Get the bit number */
+ BitNumber = OperandSize ? State->GeneralRegs[ModRegRm.Register].Long
+ : (ULONG)State->GeneralRegs[ModRegRm.Register].LowWord;
+
+ if (ModRegRm.Memory)
+ {
+ /*
+ * For memory operands, add the bit offset divided by
+ * the data size to the address
+ */
+ ModRegRm.MemoryAddress += BitNumber / DataSize;
+ }
+
+ /* Normalize the bit number */
+ BitNumber %= DataSize;
+
+ if (OperandSize)
+ {
+ ULONG Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+ }
+ else
+ {
+ USHORT Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+ }
+}
+
+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;
+ }
+
+ if (Opcode == 0xA4)
+ {
+ /* Fetch the count */
+ if (!Fast486FetchByte(State, &Count))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+ else
+ {
+ /* The count is in CL */
+ Count = State->GeneralRegs[FAST486_REG_ECX].LowByte;
+ }
+
+ /* Normalize the count */
+ Count &= 0x1F;
+
+ /* Do nothing if the count is zero */
+ if (Count == 0) return;
+
+ if (OperandSize)
+ {
+ ULONG Source, Destination, Result;
+
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* 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 */
+ Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Result);
+ }
+ else
+ {
+ USHORT Source, Destination, Result;
+ ULONG DoubleSource;
+
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ DoubleSource = Source | (Source << 16);
+
+ /* Calculate the result */
+ Result = (Destination << Count) | (DoubleSource >> (32 - Count));
+
+ /* Update flags */
+ if (Count <= 16) State->Flags.Cf = (Destination >> (16 - Count)) & 1;
+ else State->Flags.Cf = (Source >> (32 - 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 */
+ Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Result);
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePushGs)
+{
+ /* Call the internal API */
+ Fast486StackPush(State, State->SegmentRegs[FAST486_REG_GS].Selector);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePopGs)
+{
+ ULONG NewSelector;
+
+ if (!Fast486StackPop(State, &NewSelector))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Call the internal API */
+ Fast486LoadSegment(State, FAST486_REG_GS, LOWORD(NewSelector));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBts)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ UINT DataSize;
+ ULONG BitNumber;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the number of bits */
+ if (OperandSize) DataSize = 32;
+ else DataSize = 16;
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Get the bit number */
+ BitNumber = OperandSize ? State->GeneralRegs[ModRegRm.Register].Long
+ : (ULONG)State->GeneralRegs[ModRegRm.Register].LowWord;
+
+ if (ModRegRm.Memory)
+ {
+ /*
+ * For memory operands, add the bit offset divided by
+ * the data size to the address
+ */
+ ModRegRm.MemoryAddress += BitNumber / DataSize;
+ }
+
+ /* Normalize the bit number */
+ BitNumber %= DataSize;
+
+ if (OperandSize)
+ {
+ ULONG Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+
+ /* Set the bit */
+ Value |= 1 << BitNumber;
+
+ /* Write back the result */
+ Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Value);
+ }
+ else
+ {
+ USHORT Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+
+ /* Set the bit */
+ Value |= 1 << BitNumber;
+
+ /* Write back the result */
+ Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Value);
+ }
+}
+
+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;
+ }
+
+ if (Opcode == 0xAC)
+ {
+ /* Fetch the count */
+ if (!Fast486FetchByte(State, &Count))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+ else
+ {
+ /* The count is in CL */
+ Count = State->GeneralRegs[FAST486_REG_ECX].LowByte;
+ }
+
+ /* Normalize the count */
+ Count &= 0x1F;
+
+ /* Do nothing if the count is zero */
+ if (Count == 0) return;
+
+ if (OperandSize)
+ {
+ ULONG Source, Destination, Result;
+
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* 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 */
+ Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Result);
+ }
+ else
+ {
+ USHORT Source, Destination, Result;
+
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Calculate the result */
+ Result = (Destination >> Count) | (Source << (16 - Count));
+
+ if (Count >= 16) Result |= (ULONG)(Source | (Source << 16)) >> (Count - 16);
+
+ /* Update flags */
+ if (Count <= 16) State->Flags.Cf = (Destination >> (Count - 1)) & 1;
+ else State->Flags.Cf = (Source >> (Count - 17)) & 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 */
+ 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;
+
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (OperandSize)
+ {
+ LONG Source, Destination;
+ LONGLONG Result;
+
+ /* Read the operands */
+ if (!Fast486ReadModrmDwordOperands(State,
+ &ModRegRm,
+ (PULONG)&Destination,
+ (PULONG)&Source))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* 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 */
+ 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;
+ }
+
+ /* 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 */
+ Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, (USHORT)((SHORT)Result));
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeCmpXchgByte)
+{
+ FAST486_MOD_REG_RM ModRegRm;
+ UCHAR Accumulator = State->GeneralRegs[FAST486_REG_EAX].LowByte;
+ UCHAR Source, Destination, Result;
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Read the operands */
+ if (!Fast486ReadModrmByteOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Compare AL with the destination */
+ Result = Accumulator - Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = (Accumulator < Destination);
+ 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);
+ State->Flags.Sf = ((Result & SIGN_FLAG_BYTE) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ if (State->Flags.Zf)
+ {
+ /* Load the source operand into the destination */
+ Fast486WriteModrmByteOperands(State, &ModRegRm, FALSE, Source);
+ }
+ else
+ {
+ /* Load the destination into AL */
+ State->GeneralRegs[FAST486_REG_EAX].LowByte = Destination;
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeCmpXchg)
+{
+ FAST486_MOD_REG_RM ModRegRm;
+ BOOLEAN OperandSize, AddressSize;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (OperandSize)
+ {
+ ULONG Source, Destination, Result;
+ ULONG Accumulator = State->GeneralRegs[FAST486_REG_EAX].Long;
+
+ /* Read the operands */
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Compare EAX with the destination */
+ Result = Accumulator - Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = (Accumulator < Destination);
+ 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);
+ State->Flags.Sf = ((Result & SIGN_FLAG_LONG) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ if (State->Flags.Zf)
+ {
+ /* Load the source operand into the destination */
+ Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Source);
+ }
+ else
+ {
+ /* Load the destination into EAX */
+ State->GeneralRegs[FAST486_REG_EAX].Long = Destination;
+ }
+ }
+ else
+ {
+ USHORT Source, Destination, Result;
+ USHORT Accumulator = State->GeneralRegs[FAST486_REG_EAX].LowWord;
+
+ /* Read the operands */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, &Source, &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Compare AX with the destination */
+ Result = Accumulator - Destination;
+
+ /* Update the flags */
+ State->Flags.Cf = (Accumulator < Destination);
+ 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);
+ State->Flags.Sf = ((Result & SIGN_FLAG_WORD) != 0);
+ State->Flags.Pf = Fast486CalculateParity(Result);
+
+ if (State->Flags.Zf)
+ {
+ /* Load the source operand into the destination */
+ Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Source);
+ }
+ else
+ {
+ /* Load the destination into AX */
+ State->GeneralRegs[FAST486_REG_EAX].LowWord = Destination;
+ }
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLss)
+{
+ UCHAR FarPointer[6];
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xB2);
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (!ModRegRm.Memory)
+ {
+ /* Invalid */
+ Fast486Exception(State, FAST486_EXCEPTION_UD);
+ return;
+ }
+
+ if (!Fast486ReadMemory(State,
+ (State->PrefixFlags & FAST486_PREFIX_SEG)
+ ? State->SegmentOverride : FAST486_REG_DS,
+ ModRegRm.MemoryAddress,
+ FALSE,
+ FarPointer,
+ OperandSize ? 6 : 4))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ 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 */
+ Fast486LoadSegment(State, FAST486_REG_SS, 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 */
+ Fast486LoadSegment(State, FAST486_REG_SS, Segment);
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBtr)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ UINT DataSize;
+ ULONG BitNumber;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the number of bits */
+ if (OperandSize) DataSize = 32;
+ else DataSize = 16;
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Get the bit number */
+ BitNumber = OperandSize ? State->GeneralRegs[ModRegRm.Register].Long
+ : (ULONG)State->GeneralRegs[ModRegRm.Register].LowWord;
+
+ if (ModRegRm.Memory)
+ {
+ /*
+ * For memory operands, add the bit offset divided by
+ * the data size to the address
+ */
+ ModRegRm.MemoryAddress += BitNumber / DataSize;
+ }
+
+ /* Normalize the bit number */
+ BitNumber %= DataSize;
+
+ if (OperandSize)
+ {
+ ULONG Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+
+ /* Clear the bit */
+ Value &= ~(1 << BitNumber);
+
+ /* Write back the result */
+ Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Value);
+ }
+ else
+ {
+ USHORT Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+
+ /* Clear the bit */
+ Value &= ~(1 << BitNumber);
+
+ /* Write back the result */
+ Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Value);
+ }
+}
+
+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_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (!ModRegRm.Memory)
+ {
+ /* Invalid */
+ Fast486Exception(State, FAST486_EXCEPTION_UD);
+ return;
+ }
+
+ if (!Fast486ReadMemory(State,
+ (State->PrefixFlags & FAST486_PREFIX_SEG)
+ ? State->SegmentOverride : FAST486_REG_DS,
+ ModRegRm.MemoryAddress,
+ FALSE,
+ FarPointer,
+ OperandSize ? 6 : 4))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ 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 */
+ 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 */
+ Fast486LoadSegment(State,
+ (Opcode == 0xB4)
+ ? FAST486_REG_FS : FAST486_REG_GS,
+ Segment);
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeMovzxByte)
+{
+ UCHAR 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;
+ }
+
+ /* Read the operands */
+ if (!Fast486ReadModrmByteOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Write back the zero-extended value */
+ Fast486WriteModrmDwordOperands(State,
+ &ModRegRm,
+ TRUE,
+ (ULONG)Value);
+}
-FAST486_OPCODE_HANDLER(Fast486ExtOpcodeConditionalJmp)
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeMovzxWord)
{
- BOOLEAN Jump = FALSE;
- LONG Offset = 0;
- BOOLEAN Size = State->SegmentRegs[FAST486_REG_CS].Size;
+ USHORT 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;
+ }
- if (State->PrefixFlags & FAST486_PREFIX_OPSIZE)
+ /* Read the operands */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Value))
{
- /* The OPSIZE prefix toggles the size */
- Size = !Size;
+ /* Exception occurred */
+ return;
}
- if (State->PrefixFlags & FAST486_PREFIX_LOCK)
+ /* Write back the zero-extended value */
+ Fast486WriteModrmDwordOperands(State,
+ &ModRegRm,
+ TRUE,
+ (ULONG)Value);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBtc)
+{
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ UINT DataSize;
+ ULONG BitNumber;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the number of bits */
+ if (OperandSize) DataSize = 32;
+ else DataSize = 16;
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
{
- /* Invalid prefix */
- Fast486Exception(State, FAST486_EXCEPTION_UD);
- return FALSE;
+ /* Exception occurred */
+ return;
+ }
+
+ /* Get the bit number */
+ BitNumber = OperandSize ? State->GeneralRegs[ModRegRm.Register].Long
+ : (ULONG)State->GeneralRegs[ModRegRm.Register].LowWord;
+
+ if (ModRegRm.Memory)
+ {
+ /*
+ * For memory operands, add the bit offset divided by
+ * the data size to the address
+ */
+ ModRegRm.MemoryAddress += BitNumber / DataSize;
+ }
+
+ /* Normalize the bit number */
+ BitNumber %= DataSize;
+
+ if (OperandSize)
+ {
+ ULONG Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+
+ /* Toggle the bit */
+ Value ^= 1 << BitNumber;
+
+ /* Write back the result */
+ Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Value);
+ }
+ else
+ {
+ USHORT Value;
+
+ /* Read the value */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Set CF to the bit value */
+ State->Flags.Cf = (Value >> BitNumber) & 1;
+
+ /* Toggle the bit */
+ Value ^= 1 << BitNumber;
+
+ /* Write back the result */
+ Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Value);
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBsf)
+{
+ INT i;
+ ULONG Value = 0;
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ ULONG BitNumber;
+ UINT DataSize;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xBC);
+
+ /* Get the number of bits */
+ if (OperandSize) DataSize = 32;
+ else DataSize = 16;
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Read the value */
+ if (OperandSize)
+ {
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+ else
+ {
+ if (!Fast486ReadModrmWordOperands(State,
+ &ModRegRm,
+ (PUSHORT)NULL,
+ (PUSHORT)&Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+
+ /* Set ZF */
+ State->Flags.Zf = (Value == 0);
+ if (State->Flags.Zf) return;
+
+ for (i = 0; i < DataSize; i++)
+ {
+ if (Value & (1 << i))
+ {
+ /* Save the bit number */
+ BitNumber = i;
+
+ /* Exit the loop */
+ break;
+ }
+ }
+
+ /* Write back the result */
+ if (OperandSize) Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, BitNumber);
+ else Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, LOWORD(BitNumber));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBsr)
+{
+ INT i;
+ ULONG Value = 0;
+ BOOLEAN OperandSize, AddressSize;
+ FAST486_MOD_REG_RM ModRegRm;
+ ULONG BitNumber;
+ UINT DataSize;
+
+ OperandSize = AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
+ TOGGLE_OPSIZE(OperandSize);
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xBD);
+
+ /* Get the number of bits */
+ if (OperandSize) DataSize = 32;
+ else DataSize = 16;
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Read the value */
+ if (OperandSize)
+ {
+ if (!Fast486ReadModrmDwordOperands(State, &ModRegRm, NULL, &Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+ else
+ {
+ if (!Fast486ReadModrmWordOperands(State,
+ &ModRegRm,
+ (PUSHORT)NULL,
+ (PUSHORT)&Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+
+ /* Set ZF according to the value */
+ State->Flags.Zf = (Value == 0);
+ if (State->Flags.Zf) return;
+
+ for (i = DataSize - 1; i >= 0; i--)
+ {
+ if (Value & (1 << i))
+ {
+ /* Save the bit number */
+ BitNumber = i;
+
+ /* Exit the loop */
+ break;
+ }
+ }
+
+ /* Write back the result */
+ if (OperandSize) Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, BitNumber);
+ else Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, LOWORD(BitNumber));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeMovsxByte)
+{
+ CHAR 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 == 0xBE);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Read the operands */
+ if (!Fast486ReadModrmByteOperands(State, &ModRegRm, NULL, (PUCHAR)&Value))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Write back the sign-extended value */
+ Fast486WriteModrmDwordOperands(State,
+ &ModRegRm,
+ TRUE,
+ (ULONG)((LONG)Value));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeMovsxWord)
+{
+ SHORT 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 == 0xBF);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Read the operands */
+ if (!Fast486ReadModrmWordOperands(State, &ModRegRm, NULL, (PUSHORT)&Value))
+ {
+ /* Exception occurred */
+ return;
}
+ /* Write back the sign-extended value */
+ Fast486WriteModrmDwordOperands(State,
+ &ModRegRm,
+ TRUE,
+ (ULONG)((LONG)Value));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeConditionalJmp)
+{
+ BOOLEAN Jump = FALSE;
+ LONG Offset = 0;
+ BOOLEAN Size = State->SegmentRegs[FAST486_REG_CS].Size;
+
+ TOGGLE_OPSIZE(Size);
+ NO_LOCK_PREFIX();
+
/* Make sure this is the right instruction */
ASSERT((Opcode & 0xF0) == 0x80);
if (!Fast486FetchDword(State, (PULONG)&Offset))
{
/* Exception occurred */
- return FALSE;
+ return;
}
}
else
if (!Fast486FetchWord(State, (PUSHORT)&Value))
{
/* Exception occurred */
- return FALSE;
+ return;
}
/* Sign-extend */
if (Jump)
{
- /* Move the instruction pointer */
+ /* Move the instruction pointer */
State->InstPtr.Long += Offset;
}
-
- /* Return success */
- return TRUE;
}
FAST486_OPCODE_HANDLER(Fast486ExtOpcodeConditionalSet)
BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
FAST486_MOD_REG_RM ModRegRm;
- if (State->PrefixFlags & FAST486_PREFIX_ADSIZE)
- {
- /* The OPSIZE prefix toggles the size */
- AddressSize = !AddressSize;
- }
+ TOGGLE_ADSIZE(AddressSize);
/* Get the operands */
if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
{
/* Exception occurred */
- return FALSE;
+ return;
}
/* Make sure this is the right instruction */
}
/* Write back the result */
- return Fast486WriteModrmByteOperands(State, &ModRegRm, FALSE, Value);
+ Fast486WriteModrmByteOperands(State, &ModRegRm, FALSE, Value);
}
-FAST486_OPCODE_HANDLER(Fast486OpcodeExtended)
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeXaddByte)
{
- UCHAR SecondOpcode;
+ UCHAR Source, Destination, Result;
+ FAST486_MOD_REG_RM ModRegRm;
+ BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
- /* Fetch the second operation code */
- if (!Fast486FetchByte(State, &SecondOpcode))
+ /* Make sure this is the right instruction */
+ ASSERT(Opcode == 0xC0);
+
+ TOGGLE_ADSIZE(AddressSize);
+
+ /* Get the operands */
+ if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ if (!Fast486ReadModrmByteOperands(State,
+ &ModRegRm,
+ &Source,
+ &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* 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;
+ }
+
+ /* Write the old value of the destination to the source */
+ Fast486WriteModrmByteOperands(State, &ModRegRm, TRUE, Destination);
+}
+
+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;
+ return;
}
- if (Fast486ExtendedHandlers[SecondOpcode] != NULL)
+ /* Check the operand size */
+ if (OperandSize)
{
- /* Call the extended opcode handler */
- return Fast486ExtendedHandlers[SecondOpcode](State, SecondOpcode);
+ ULONG Source, Destination, Result;
+
+ if (!Fast486ReadModrmDwordOperands(State,
+ &ModRegRm,
+ &Source,
+ &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* 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 old value of the destination to the source */
+ if (!Fast486WriteModrmDwordOperands(State, &ModRegRm, TRUE, Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Write the sum to the destination */
+ Fast486WriteModrmDwordOperands(State, &ModRegRm, FALSE, Result);
}
else
{
- /* This is not a valid opcode */
- Fast486Exception(State, FAST486_EXCEPTION_UD);
- return FALSE;
+ USHORT Source, Destination, Result;
+
+ if (!Fast486ReadModrmWordOperands(State,
+ &ModRegRm,
+ &Source,
+ &Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* 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 old value of the destination to the source */
+ if (!Fast486WriteModrmWordOperands(State, &ModRegRm, TRUE, Destination))
+ {
+ /* Exception occurred */
+ return;
+ }
+
+ /* Write the sum to the destination */
+ Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, Result);
+ }
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBswap)
+{
+ PUCHAR Pointer;
+
+ NO_LOCK_PREFIX();
+
+ /* Get a pointer to the value */
+ Pointer = (PUCHAR)&State->GeneralRegs[Opcode & 0x07].Long;
+
+ /* Swap the byte order */
+ SWAP(Pointer[0], Pointer[3]);
+ SWAP(Pointer[1], Pointer[2]);
+}
+
+FAST486_OPCODE_HANDLER(Fast486OpcodeExtended)
+{
+ UCHAR SecondOpcode;
+
+ /* Fetch the second operation code */
+ if (!Fast486FetchByte(State, &SecondOpcode))
+ {
+ /* Exception occurred */
+ return;
}
+
+ /* Call the extended opcode handler */
+ Fast486ExtendedHandlers[SecondOpcode](State, SecondOpcode);
}
+
+/* EOF */
projects / reactos.git / blobdiff