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Diffstat (limited to 'src/emu/cpu/i386/i386ops.c')
-rw-r--r--src/emu/cpu/i386/i386ops.c2306
1 files changed, 2306 insertions, 0 deletions
diff --git a/src/emu/cpu/i386/i386ops.c b/src/emu/cpu/i386/i386ops.c
new file mode 100644
index 00000000000..8a98897e91f
--- /dev/null
+++ b/src/emu/cpu/i386/i386ops.c
@@ -0,0 +1,2306 @@
+static UINT8 I386OP(shift_rotate8)(UINT8 modrm, UINT32 value, UINT8 shift)
+{
+ UINT8 src = value;
+ UINT8 dst = value;
+
+ if( shift == 0 ) {
+ CYCLES_RM(modrm, 3, 7);
+ } else if( shift == 1 ) {
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* ROL rm8, 1 */
+ I.CF = (src & 0x80) ? 1 : 0;
+ dst = (src << 1) + I.CF;
+ I.OF = ((src ^ dst) & 0x80) ? 1 : 0;
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 1: /* ROR rm8, 1 */
+ I.CF = (src & 0x1) ? 1 : 0;
+ dst = (I.CF << 7) | (src >> 1);
+ I.OF = ((src ^ dst) & 0x80) ? 1 : 0;
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 2: /* RCL rm8, 1 */
+ dst = (src << 1) + I.CF;
+ I.CF = (src & 0x80) ? 1 : 0;
+ I.OF = ((src ^ dst) & 0x80) ? 1 : 0;
+ CYCLES_RM(modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 3: /* RCR rm8, 1 */
+ dst = (I.CF << 7) | (src >> 1);
+ I.CF = src & 0x1;
+ I.OF = ((src ^ dst) & 0x80) ? 1 : 0;
+ CYCLES_RM(modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 4: /* SHL/SAL rm8, 1 */
+ case 6:
+ dst = src << 1;
+ I.CF = (src & 0x80) ? 1 : 0;
+ I.OF = (((I.CF << 7) ^ dst) & 0x80) ? 1 : 0;
+ SetSZPF8(dst);
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 5: /* SHR rm8, 1 */
+ dst = src >> 1;
+ I.CF = src & 0x1;
+ I.OF = (dst & 0x80) ? 1 : 0;
+ SetSZPF8(dst);
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 7: /* SAR rm8, 1 */
+ dst = (INT8)(src) >> 1;
+ I.CF = src & 0x1;
+ I.OF = 0;
+ SetSZPF8(dst);
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ }
+
+ } else {
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* ROL rm8, i8 */
+ dst = ((src & ((UINT8)0xff >> shift)) << shift) |
+ ((src & ((UINT8)0xff << (8-shift))) >> (8-shift));
+ I.CF = (src >> (8-shift)) & 0x1;
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 1: /* ROR rm8, i8 */
+ dst = ((src & ((UINT8)0xff << shift)) >> shift) |
+ ((src & ((UINT8)0xff >> (8-shift))) << (8-shift));
+ I.CF = (src >> (shift-1)) & 0x1;
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 2: /* RCL rm8, i8 */
+ dst = ((src & ((UINT8)0xff >> shift)) << shift) |
+ ((src & ((UINT8)0xff << (9-shift))) >> (9-shift)) |
+ (I.CF << (shift-1));
+ I.CF = (src >> (8-shift)) & 0x1;
+ CYCLES_RM(modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 3: /* RCR rm8, i8 */
+ dst = ((src & ((UINT8)0xff << shift)) >> shift) |
+ ((src & ((UINT8)0xff >> (8-shift))) << (9-shift)) |
+ (I.CF << (8-shift));
+ I.CF = (src >> (shift-1)) & 0x1;
+ CYCLES_RM(modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 4: /* SHL/SAL rm8, i8 */
+ case 6:
+ dst = src << shift;
+ I.CF = (src & (1 << (8-shift))) ? 1 : 0;
+ SetSZPF8(dst);
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 5: /* SHR rm8, i8 */
+ dst = src >> shift;
+ I.CF = (src & (1 << (shift-1))) ? 1 : 0;
+ SetSZPF8(dst);
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 7: /* SAR rm8, i8 */
+ dst = (INT8)src >> shift;
+ I.CF = (src & (1 << (shift-1))) ? 1 : 0;
+ SetSZPF8(dst);
+ CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ }
+ }
+
+ return dst;
+}
+
+
+
+static void I386OP(adc_rm8_r8)(void) // Opcode 0x10
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ src = ADD8(src, I.CF);
+ dst = ADD8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ src = ADD8(src, I.CF);
+ dst = ADD8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(adc_r8_rm8)(void) // Opcode 0x12
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ dst = LOAD_REG8(modrm);
+ src = ADD8(src, I.CF);
+ dst = ADD8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ dst = LOAD_REG8(modrm);
+ src = ADD8(src, I.CF);
+ dst = ADD8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(adc_al_i8)(void) // Opcode 0x14
+{
+ UINT8 src, dst;
+ src = FETCH();
+ dst = REG8(AL);
+ src = ADD8(src, I.CF);
+ dst = ADD8(dst, src);
+ REG8(AL) = dst;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(add_rm8_r8)(void) // Opcode 0x00
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ dst = ADD8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ dst = ADD8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(add_r8_rm8)(void) // Opcode 0x02
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ dst = LOAD_REG8(modrm);
+ dst = ADD8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ dst = LOAD_REG8(modrm);
+ dst = ADD8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(add_al_i8)(void) // Opcode 0x04
+{
+ UINT8 src, dst;
+ src = FETCH();
+ dst = REG8(AL);
+ dst = ADD8(dst, src);
+ REG8(AL) = dst;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(and_rm8_r8)(void) // Opcode 0x20
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ dst = AND8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ dst = AND8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(and_r8_rm8)(void) // Opcode 0x22
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ dst = LOAD_REG8(modrm);
+ dst = AND8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ dst = LOAD_REG8(modrm);
+ dst = AND8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(and_al_i8)(void) // Opcode 0x24
+{
+ UINT8 src, dst;
+ src = FETCH();
+ dst = REG8(AL);
+ dst = AND8(dst, src);
+ REG8(AL) = dst;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(clc)(void) // Opcode 0xf8
+{
+ I.CF = 0;
+ CYCLES(CYCLES_CLC);
+}
+
+static void I386OP(cld)(void) // Opcode 0xfc
+{
+ I.DF = 0;
+ CYCLES(CYCLES_CLD);
+}
+
+static void I386OP(cli)(void) // Opcode 0xfa
+{
+ I.IF = 0;
+ CYCLES(CYCLES_CLI);
+}
+
+static void I386OP(cmc)(void) // Opcode 0xf5
+{
+ I.CF ^= 1;
+ CYCLES(CYCLES_CMC);
+}
+
+static void I386OP(cmp_rm8_r8)(void) // Opcode 0x38
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ SUB8(dst, src);
+ CYCLES(CYCLES_CMP_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ SUB8(dst, src);
+ CYCLES(CYCLES_CMP_REG_MEM);
+ }
+}
+
+static void I386OP(cmp_r8_rm8)(void) // Opcode 0x3a
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ dst = LOAD_REG8(modrm);
+ SUB8(dst, src);
+ CYCLES(CYCLES_CMP_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ dst = LOAD_REG8(modrm);
+ SUB8(dst, src);
+ CYCLES(CYCLES_CMP_MEM_REG);
+ }
+}
+
+static void I386OP(cmp_al_i8)(void) // Opcode 0x3c
+{
+ UINT8 src, dst;
+ src = FETCH();
+ dst = REG8(AL);
+ SUB8(dst, src);
+ CYCLES(CYCLES_CMP_IMM_ACC);
+}
+
+static void I386OP(cmpsb)(void) // Opcode 0xa6
+{
+ UINT32 eas, ead;
+ UINT8 src, dst;
+ if( I.segment_prefix ) {
+ eas = i386_translate( I.segment_override, I.address_size ? REG32(ESI) : REG16(SI) );
+ } else {
+ eas = i386_translate( DS, I.address_size ? REG32(ESI) : REG16(SI) );
+ }
+ ead = i386_translate( ES, I.address_size ? REG32(EDI) : REG16(DI) );
+ src = READ8(eas);
+ dst = READ8(ead);
+ SUB8(dst, src);
+ BUMP_SI(1);
+ BUMP_DI(1);
+ CYCLES(CYCLES_CMPS);
+}
+
+static void I386OP(in_al_i8)(void) // Opcode 0xe4
+{
+ UINT16 port = FETCH();
+ UINT8 data = READPORT8(port);
+ REG8(AL) = data;
+ CYCLES(CYCLES_IN_VAR);
+}
+
+static void I386OP(in_al_dx)(void) // Opcode 0xec
+{
+ UINT16 port = REG16(DX);
+ UINT8 data = READPORT8(port);
+ REG8(AL) = data;
+ CYCLES(CYCLES_IN);
+}
+
+static void I386OP(ja_rel8)(void) // Opcode 0x77
+{
+ INT8 disp = FETCH();
+ if( I.CF == 0 && I.ZF == 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jbe_rel8)(void) // Opcode 0x76
+{
+ INT8 disp = FETCH();
+ if( I.CF != 0 || I.ZF != 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jc_rel8)(void) // Opcode 0x72
+{
+ INT8 disp = FETCH();
+ if( I.CF != 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jg_rel8)(void) // Opcode 0x7f
+{
+ INT8 disp = FETCH();
+ if( I.ZF == 0 && (I.SF == I.OF) ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jge_rel8)(void) // Opcode 0x7d
+{
+ INT8 disp = FETCH();
+ if( (I.SF == I.OF) ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jl_rel8)(void) // Opcode 0x7c
+{
+ INT8 disp = FETCH();
+ if( (I.SF != I.OF) ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jle_rel8)(void) // Opcode 0x7e
+{
+ INT8 disp = FETCH();
+ if( I.ZF != 0 || (I.SF != I.OF) ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jnc_rel8)(void) // Opcode 0x73
+{
+ INT8 disp = FETCH();
+ if( I.CF == 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jno_rel8)(void) // Opcode 0x71
+{
+ INT8 disp = FETCH();
+ if( I.OF == 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jnp_rel8)(void) // Opcode 0x7b
+{
+ INT8 disp = FETCH();
+ if( I.PF == 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jns_rel8)(void) // Opcode 0x79
+{
+ INT8 disp = FETCH();
+ if( I.SF == 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jnz_rel8)(void) // Opcode 0x75
+{
+ INT8 disp = FETCH();
+ if( I.ZF == 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jo_rel8)(void) // Opcode 0x70
+{
+ INT8 disp = FETCH();
+ if( I.OF != 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jp_rel8)(void) // Opcode 0x7a
+{
+ INT8 disp = FETCH();
+ if( I.PF != 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(js_rel8)(void) // Opcode 0x78
+{
+ INT8 disp = FETCH();
+ if( I.SF != 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jz_rel8)(void) // Opcode 0x74
+{
+ INT8 disp = FETCH();
+ if( I.ZF != 0 ) {
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JCC_DISP8); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(CYCLES_JCC_DISP8_NOBRANCH);
+ }
+}
+
+static void I386OP(jmp_rel8)(void) // Opcode 0xeb
+{
+ INT8 disp = FETCH();
+ NEAR_BRANCH(disp);
+ CYCLES(CYCLES_JMP_SHORT); /* TODO: Timing = 7 + m */
+}
+
+static void I386OP(lahf)(void) // Opcode 0x9f
+{
+ REG8(AH) = get_flags() & 0xd7;
+ CYCLES(CYCLES_LAHF);
+}
+
+static void I386OP(lodsb)(void) // Opcode 0xac
+{
+ UINT32 eas;
+ if( I.segment_prefix ) {
+ eas = i386_translate( I.segment_override, I.address_size ? REG32(ESI) : REG16(SI) );
+ } else {
+ eas = i386_translate( DS, I.address_size ? REG32(ESI) : REG16(SI) );
+ }
+ REG8(AL) = READ8(eas);
+ BUMP_SI(1);
+ CYCLES(CYCLES_LODS);
+}
+
+static void I386OP(mov_rm8_r8)(void) // Opcode 0x88
+{
+ UINT8 src;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ STORE_RM8(modrm, src);
+ CYCLES(CYCLES_MOV_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ WRITE8(ea, src);
+ CYCLES(CYCLES_MOV_REG_MEM);
+ }
+}
+
+static void I386OP(mov_r8_rm8)(void) // Opcode 0x8a
+{
+ UINT8 src;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ STORE_REG8(modrm, src);
+ CYCLES(CYCLES_MOV_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ STORE_REG8(modrm, src);
+ CYCLES(CYCLES_MOV_MEM_REG);
+ }
+}
+
+static void I386OP(mov_rm8_i8)(void) // Opcode 0xc6
+{
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ UINT8 value = FETCH();
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_MOV_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ UINT8 value = FETCH();
+ WRITE8(ea, value);
+ CYCLES(CYCLES_MOV_IMM_MEM);
+ }
+}
+
+static void I386OP(mov_r32_cr)(void) // Opcode 0x0f 20
+{
+ UINT8 modrm = FETCH();
+ UINT8 cr = (modrm >> 3) & 0x7;
+
+ STORE_RM32(modrm, I.cr[cr]);
+ CYCLES(CYCLES_MOV_CR_REG);
+}
+
+static void I386OP(mov_r32_dr)(void) // Opcode 0x0f 21
+{
+ UINT8 modrm = FETCH();
+ UINT8 dr = (modrm >> 3) & 0x7;
+
+ STORE_RM32(modrm, I.dr[dr]);
+ switch(dr)
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ CYCLES(CYCLES_MOV_REG_DR0_3);
+ break;
+ case 6:
+ case 7:
+ CYCLES(CYCLES_MOV_REG_DR6_7);
+ break;
+ }
+}
+
+static void I386OP(mov_cr_r32)(void) // Opcode 0x0f 22
+{
+ UINT8 modrm = FETCH();
+ UINT8 cr = (modrm >> 3) & 0x7;
+
+ I.cr[cr] = LOAD_RM32(modrm);
+ switch(cr)
+ {
+ case 0: CYCLES(CYCLES_MOV_REG_CR0); break;
+ case 2: CYCLES(CYCLES_MOV_REG_CR2); break;
+ case 3: CYCLES(CYCLES_MOV_REG_CR3); break;
+ default:
+ fatalerror("i386: mov_cr_r32 CR%d !", cr);
+ break;
+ }
+}
+
+static void I386OP(mov_dr_r32)(void) // Opcode 0x0f 23
+{
+ UINT8 modrm = FETCH();
+ UINT8 dr = (modrm >> 3) & 0x7;
+
+ I.dr[dr] = LOAD_RM32(modrm);
+ switch(dr)
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ CYCLES(CYCLES_MOV_DR0_3_REG);
+ break;
+ case 6:
+ case 7:
+ CYCLES(CYCLES_MOV_DR6_7_REG);
+ break;
+ default:
+ fatalerror("i386: mov_dr_r32 DR%d !", dr);
+ break;
+ }
+}
+
+static void I386OP(mov_al_m8)(void) // Opcode 0xa0
+{
+ UINT32 offset, ea;
+ if( I.address_size ) {
+ offset = FETCH32();
+ } else {
+ offset = FETCH16();
+ }
+ /* TODO: Not sure if this is correct... */
+ if( I.segment_prefix ) {
+ ea = i386_translate( I.segment_override, offset );
+ } else {
+ ea = i386_translate( DS, offset );
+ }
+ REG8(AL) = READ8(ea);
+ CYCLES(CYCLES_MOV_IMM_MEM);
+}
+
+static void I386OP(mov_m8_al)(void) // Opcode 0xa2
+{
+ UINT32 offset, ea;
+ if( I.address_size ) {
+ offset = FETCH32();
+ } else {
+ offset = FETCH16();
+ }
+ /* TODO: Not sure if this is correct... */
+ if( I.segment_prefix ) {
+ ea = i386_translate( I.segment_override, offset );
+ } else {
+ ea = i386_translate( DS, offset );
+ }
+ WRITE8( ea, REG8(AL) );
+ CYCLES(CYCLES_MOV_MEM_ACC);
+}
+
+static void I386OP(mov_rm16_sreg)(void) // Opcode 0x8c
+{
+ UINT8 modrm = FETCH();
+ int s = (modrm >> 3) & 0x7;
+
+ if( modrm >= 0xc0 ) {
+ STORE_RM16(modrm, I.sreg[s].selector);
+ CYCLES(CYCLES_MOV_SREG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE16(ea, I.sreg[s].selector);
+ CYCLES(CYCLES_MOV_SREG_MEM);
+ }
+}
+
+static void I386OP(mov_sreg_rm16)(void) // Opcode 0x8e
+{
+ UINT16 selector;
+ UINT8 modrm = FETCH();
+ int s = (modrm >> 3) & 0x7;
+
+ if( modrm >= 0xc0 ) {
+ selector = LOAD_RM16(modrm);
+ CYCLES(CYCLES_MOV_REG_SREG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ selector = READ16(ea);
+ CYCLES(CYCLES_MOV_MEM_SREG);
+ }
+ I.sreg[s].selector = selector;
+ i386_load_segment_descriptor( s );
+}
+
+static void I386OP(mov_al_i8)(void) // Opcode 0xb0
+{
+ REG8(AL) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_cl_i8)(void) // Opcode 0xb1
+{
+ REG8(CL) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_dl_i8)(void) // Opcode 0xb2
+{
+ REG8(DL) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_bl_i8)(void) // Opcode 0xb3
+{
+ REG8(BL) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_ah_i8)(void) // Opcode 0xb4
+{
+ REG8(AH) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_ch_i8)(void) // Opcode 0xb5
+{
+ REG8(CH) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_dh_i8)(void) // Opcode 0xb6
+{
+ REG8(DH) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_bh_i8)(void) // Opcode 0xb7
+{
+ REG8(BH) = FETCH();
+ CYCLES(CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(movsb)(void) // Opcode 0xa4
+{
+ UINT32 eas, ead;
+ UINT8 v;
+ if( I.segment_prefix ) {
+ eas = i386_translate( I.segment_override, I.address_size ? REG32(ESI) : REG16(SI) );
+ } else {
+ eas = i386_translate( DS, I.address_size ? REG32(ESI) : REG16(SI) );
+ }
+ ead = i386_translate( ES, I.address_size ? REG32(EDI) : REG16(DI) );
+ v = READ8(eas);
+ WRITE8(ead, v);
+ BUMP_SI(1);
+ BUMP_DI(1);
+ CYCLES(CYCLES_MOVS);
+}
+
+static void I386OP(or_rm8_r8)(void) // Opcode 0x08
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ dst = OR8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ dst = OR8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(or_r8_rm8)(void) // Opcode 0x0a
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ dst = LOAD_REG8(modrm);
+ dst = OR8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ dst = LOAD_REG8(modrm);
+ dst = OR8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(or_al_i8)(void) // Opcode 0x0c
+{
+ UINT8 src, dst;
+ src = FETCH();
+ dst = REG8(AL);
+ dst = OR8(dst, src);
+ REG8(EAX) = dst;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(out_al_i8)(void) // Opcode 0xe6
+{
+ UINT16 port = FETCH();
+ UINT8 data = REG8(AL);
+ WRITEPORT8(port, data);
+ CYCLES(CYCLES_OUT_VAR);
+}
+
+static void I386OP(out_al_dx)(void) // Opcode 0xee
+{
+ UINT16 port = REG16(DX);
+ UINT8 data = REG8(AL);
+ WRITEPORT8(port, data);
+ CYCLES(CYCLES_OUT);
+}
+
+static void I386OP(push_i8)(void) // Opcode 0x6a
+{
+ UINT8 value = FETCH();
+ PUSH8(value);
+ CYCLES(CYCLES_PUSH_IMM);
+}
+
+static void I386OP(ins_generic)(int size)
+{
+ UINT32 ead;
+ UINT8 vb;
+ UINT16 vw;
+ UINT32 vd;
+
+ ead = i386_translate( ES, I.address_size ? REG32(EDI) : REG16(DI) );
+
+ switch(size) {
+ case 1:
+ vb = READPORT8(REG16(DX));
+ WRITE8(ead, vb);
+ break;
+ case 2:
+ vw = READPORT16(REG16(DX));
+ WRITE16(ead, vw);
+ break;
+ case 4:
+ vd = READPORT32(REG16(DX));
+ WRITE32(ead, vd);
+ break;
+ }
+
+ REG32(EDI) += ((I.DF) ? -1 : 1) * size;
+ CYCLES(CYCLES_INS); // TODO: Confirm this value
+}
+
+static void I386OP(insb)(void) // Opcode 0x6c
+{
+ I386OP(ins_generic)(1);
+}
+
+static void I386OP(insw)(void) // Opcode 0x6d
+{
+ I386OP(ins_generic)(2);
+}
+
+static void I386OP(insd)(void) // Opcode 0x6d
+{
+ I386OP(ins_generic)(4);
+}
+
+static void I386OP(outs_generic)(int size)
+{
+ UINT32 eas;
+ UINT8 vb;
+ UINT16 vw;
+ UINT32 vd;
+
+ if( I.segment_prefix ) {
+ eas = i386_translate( I.segment_override, REG32(ESI) );
+ } else {
+ eas = i386_translate( DS, REG32(ESI) );
+ }
+
+ switch(size) {
+ case 1:
+ vb = READ8(eas);
+ WRITEPORT8(REG16(DX), vb);
+ break;
+ case 2:
+ vw = READ16(eas);
+ WRITEPORT16(REG16(DX), vw);
+ break;
+ case 4:
+ vd = READ32(eas);
+ WRITEPORT32(REG16(DX), vd);
+ break;
+ }
+
+ REG32(ESI) += ((I.DF) ? -1 : 1) * size;
+ CYCLES(CYCLES_OUTS); // TODO: Confirm this value
+}
+
+static void I386OP(outsb)(void) // Opcode 0x6e
+{
+ I386OP(outs_generic)(1);
+}
+
+static void I386OP(outsw)(void) // Opcode 0x6f
+{
+ I386OP(outs_generic)(2);
+}
+
+static void I386OP(outsd)(void) // Opcode 0x6f
+{
+ I386OP(outs_generic)(4);
+}
+
+static void I386OP(repeat)(int invert_flag)
+{
+ UINT32 repeated_eip = I.eip;
+ UINT32 repeated_pc = I.pc;
+ UINT8 opcode = FETCH();
+ UINT32 eas, ead;
+ UINT32 count;
+ INT32 cycle_base = 0, cycle_adjustment = 0;
+ UINT8 *flag = NULL;
+
+ if( I.segment_prefix ) {
+ eas = i386_translate( I.segment_override, I.sreg[CS].d ? REG32(ESI) : REG16(SI) );
+ } else {
+ eas = i386_translate( DS, I.sreg[CS].d ? REG32(ESI) : REG16(SI) );
+ }
+ ead = i386_translate( ES, I.sreg[CS].d ? REG32(EDI) : REG16(DI) );
+
+ if( opcode == 0x66 ) {
+ I.operand_size ^= 1;
+ repeated_eip = I.eip;
+ repeated_pc = I.pc;
+ opcode = FETCH();
+ }
+ if( opcode == 0x67 ) {
+ I.address_size ^= 1;
+ repeated_eip = I.eip;
+ repeated_pc = I.pc;
+ opcode = FETCH();
+ }
+
+ switch(opcode)
+ {
+ case 0x6c:
+ case 0x6d:
+ /* INSB, INSW, INSD */
+ // TODO: cycle count
+ cycle_base = 8;
+ cycle_adjustment = -4;
+ flag = NULL;
+ break;
+
+ case 0x6e:
+ case 0x6f:
+ /* OUTSB, OUTSW, OUTSD */
+ // TODO: cycle count
+ cycle_base = 8;
+ cycle_adjustment = -4;
+ flag = NULL;
+ break;
+
+ case 0xa4:
+ case 0xa5:
+ /* MOVSB, MOVSW, MOVSD */
+ cycle_base = 8;
+ cycle_adjustment = -4;
+ flag = NULL;
+ break;
+
+ case 0xa6:
+ case 0xa7:
+ /* CMPSB, CMPSW, CMPSD */
+ cycle_base = 5;
+ cycle_adjustment = -1;
+ flag = &I.ZF;
+ break;
+
+ case 0xac:
+ case 0xad:
+ /* LODSB, LODSW, LODSD */
+ cycle_base = 5;
+ cycle_adjustment = 1;
+ flag = NULL;
+ break;
+
+ case 0xaa:
+ case 0xab:
+ /* STOSB, STOSW, STOSD */
+ cycle_base = 5;
+ cycle_adjustment = 0;
+ flag = NULL;
+ break;
+
+ case 0xae:
+ case 0xaf:
+ /* SCASB, SCASW, SCASD */
+ cycle_base = 5;
+ cycle_adjustment = 0;
+ flag = &I.ZF;
+ break;
+
+ default:
+ fatalerror("i386: Invalid REP/opcode %02X combination",opcode);
+ break;
+ }
+
+ if( I.sreg[CS].d ) {
+ if( REG32(ECX) == 0 )
+ return;
+ } else {
+ if( REG16(CX) == 0 )
+ return;
+ }
+
+ /* now actually perform the repeat */
+ CYCLES_NUM(cycle_base);
+ do
+ {
+ I.eip = repeated_eip;
+ I.pc = repeated_pc;
+ I386OP(decode_opcode)();
+ CYCLES_NUM(cycle_adjustment);
+
+ if (I.sreg[CS].d)
+ count = --REG32(ECX);
+ else
+ count = --REG16(CX);
+ if (I.cycles <= 0)
+ goto outofcycles;
+ }
+ while( count && (!flag || (invert_flag ? !*flag : *flag)) );
+ return;
+
+outofcycles:
+ /* if we run out of cycles to execute, and we are still in the repeat, we need
+ * to exit this instruction in such a way to go right back into it when we have
+ * time to execute cycles */
+ I.eip = I.prev_eip;
+ CHANGE_PC(I.eip);
+ CYCLES_NUM(-cycle_base);
+}
+
+static void I386OP(rep)(void) // Opcode 0xf3
+{
+ I386OP(repeat)(0);
+ }
+
+static void I386OP(repne)(void) // Opcode 0xf2
+ {
+ I386OP(repeat)(1);
+}
+
+static void I386OP(sahf)(void) // Opcode 0x9e
+{
+ set_flags( (get_flags() & 0xffffff00) | (REG8(AH) & 0xd7) );
+ CYCLES(CYCLES_SAHF);
+}
+
+static void I386OP(sbb_rm8_r8)(void) // Opcode 0x18
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm) + I.CF;
+ dst = LOAD_RM8(modrm);
+ dst = SUB8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm) + I.CF;
+ dst = READ8(ea);
+ dst = SUB8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(sbb_r8_rm8)(void) // Opcode 0x1a
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm) + I.CF;
+ dst = LOAD_REG8(modrm);
+ dst = SUB8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea) + I.CF;
+ dst = LOAD_REG8(modrm);
+ dst = SUB8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(sbb_al_i8)(void) // Opcode 0x1c
+{
+ UINT8 src, dst;
+ src = FETCH() + I.CF;
+ dst = REG8(AL);
+ dst = SUB8(dst, src);
+ REG8(EAX) = dst;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(scasb)(void) // Opcode 0xae
+{
+ UINT32 eas;
+ UINT8 src, dst;
+ eas = i386_translate( ES, I.address_size ? REG32(EDI) : REG16(DI) );
+ src = READ8(eas);
+ dst = REG8(AL);
+ SUB8(dst, src);
+ BUMP_DI(1);
+ CYCLES(CYCLES_SCAS);
+}
+
+static void I386OP(setalc)(void) // Opcode 0xd6 (undocumented)
+{
+ if( I.CF ) {
+ REG8(AL) = 0xff;
+ } else {
+ REG8(AL) = 0;
+ }
+ CYCLES(3);
+}
+
+static void I386OP(seta_rm8)(void) // Opcode 0x0f 97
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.CF == 0 && I.ZF == 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setbe_rm8)(void) // Opcode 0x0f 96
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.CF != 0 || I.ZF != 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setc_rm8)(void) // Opcode 0x0f 92
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.CF != 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setg_rm8)(void) // Opcode 0x0f 9f
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.ZF == 0 && (I.SF == I.OF) ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setge_rm8)(void) // Opcode 0x0f 9d
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( (I.SF == I.OF) ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setl_rm8)(void) // Opcode 0x0f 9c
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.SF != I.OF ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setle_rm8)(void) // Opcode 0x0f 9e
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.ZF != 0 || (I.SF != I.OF) ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setnc_rm8)(void) // Opcode 0x0f 93
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.CF == 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setno_rm8)(void) // Opcode 0x0f 91
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.OF == 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setnp_rm8)(void) // Opcode 0x0f 9b
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.PF == 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setns_rm8)(void) // Opcode 0x0f 99
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.SF == 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setnz_rm8)(void) // Opcode 0x0f 95
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.ZF == 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(seto_rm8)(void) // Opcode 0x0f 90
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.OF != 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setp_rm8)(void) // Opcode 0x0f 9a
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.PF != 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(sets_rm8)(void) // Opcode 0x0f 98
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.SF != 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(setz_rm8)(void) // Opcode 0x0f 94
+{
+ UINT8 modrm = FETCH();
+ UINT8 value = 0;
+ if( I.ZF != 0 ) {
+ value = 1;
+ }
+ if( modrm >= 0xc0 ) {
+ STORE_RM8(modrm, value);
+ CYCLES(CYCLES_SETCC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ WRITE8(ea, value);
+ CYCLES(CYCLES_SETCC_MEM);
+ }
+}
+
+static void I386OP(stc)(void) // Opcode 0xf9
+{
+ I.CF = 1;
+ CYCLES(CYCLES_STC);
+}
+
+static void I386OP(std)(void) // Opcode 0xfd
+{
+ I.DF = 1;
+ CYCLES(CYCLES_STD);
+}
+
+static void I386OP(sti)(void) // Opcode 0xfb
+{
+ I.IF = 1;
+ CYCLES(CYCLES_STI);
+}
+
+static void I386OP(stosb)(void) // Opcode 0xaa
+{
+ UINT32 ead;
+ ead = i386_translate( ES, I.address_size ? REG32(EDI) : REG16(DI) );
+ WRITE8(ead, REG8(AL));
+ BUMP_DI(1);
+ CYCLES(CYCLES_STOS);
+}
+
+static void I386OP(sub_rm8_r8)(void) // Opcode 0x28
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ dst = SUB8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ dst = SUB8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(sub_r8_rm8)(void) // Opcode 0x2a
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ dst = LOAD_REG8(modrm);
+ dst = SUB8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ dst = LOAD_REG8(modrm);
+ dst = SUB8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(sub_al_i8)(void) // Opcode 0x2c
+{
+ UINT8 src, dst;
+ src = FETCH();
+ dst = REG8(EAX);
+ dst = SUB8(dst, src);
+ REG8(EAX) = dst;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(test_al_i8)(void) // Opcode 0xa8
+{
+ UINT8 src = FETCH();
+ UINT8 dst = REG8(AL);
+ dst = src & dst;
+ SetSZPF8(dst);
+ I.CF = 0;
+ I.OF = 0;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(test_rm8_r8)(void) // Opcode 0x84
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ dst = src & dst;
+ SetSZPF8(dst);
+ I.CF = 0;
+ I.OF = 0;
+ CYCLES(CYCLES_TEST_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ dst = src & dst;
+ SetSZPF8(dst);
+ I.CF = 0;
+ I.OF = 0;
+ CYCLES(CYCLES_TEST_REG_MEM);
+ }
+}
+
+static void I386OP(xchg_r8_rm8)(void) // Opcode 0x86
+{
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ UINT8 src = LOAD_RM8(modrm);
+ UINT8 dst = LOAD_REG8(modrm);
+ STORE_REG8(modrm, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_XCHG_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ UINT8 src = READ8(ea);
+ UINT8 dst = LOAD_REG8(modrm);
+ STORE_REG8(modrm, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_XCHG_REG_MEM);
+ }
+}
+
+static void I386OP(xor_rm8_r8)(void) // Opcode 0x30
+{
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG8(modrm);
+ dst = LOAD_RM8(modrm);
+ dst = XOR8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = LOAD_REG8(modrm);
+ dst = READ8(ea);
+ dst = XOR8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(xor_r8_rm8)(void) // Opcode 0x32
+{
+ UINT32 src, dst;
+ UINT8 modrm = FETCH();
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ dst = LOAD_REG8(modrm);
+ dst = XOR8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ dst = LOAD_REG8(modrm);
+ dst = XOR8(dst, src);
+ STORE_REG8(modrm, dst);
+ CYCLES(CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(xor_al_i8)(void) // Opcode 0x34
+{
+ UINT8 src, dst;
+ src = FETCH();
+ dst = REG8(AL);
+ dst = XOR8(dst, src);
+ REG8(AL) = dst;
+ CYCLES(CYCLES_ALU_IMM_ACC);
+}
+
+
+
+static void I386OP(group80_8)(void) // Opcode 0x80
+{
+ UINT32 ea;
+ UINT8 src, dst;
+ UINT8 modrm = FETCH();
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: // ADD Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH();
+ dst = ADD8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH();
+ dst = ADD8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 1: // OR Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH();
+ dst = OR8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH();
+ dst = OR8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 2: // ADC Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH();
+ src = ADD8(src, I.CF);
+ dst = ADD8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH();
+ src = ADD8(src, I.CF);
+ dst = ADD8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 3: // SBB Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH() + I.CF;
+ dst = SUB8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH() + I.CF;
+ dst = SUB8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 4: // AND Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH();
+ dst = AND8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH();
+ dst = AND8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 5: // SUB Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH();
+ dst = SUB8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH();
+ dst = SUB8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 6: // XOR Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH();
+ dst = XOR8(dst, src);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH();
+ dst = XOR8(dst, src);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 7: // CMP Rm8, i8
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ src = FETCH();
+ SUB8(dst, src);
+ CYCLES(CYCLES_CMP_REG_REG);
+ } else {
+ ea = GetEA(modrm);
+ dst = READ8(ea);
+ src = FETCH();
+ SUB8(dst, src);
+ CYCLES(CYCLES_CMP_REG_MEM);
+ }
+ break;
+ }
+}
+
+static void I386OP(groupC0_8)(void) // Opcode 0xc0
+{
+ UINT8 dst;
+ UINT8 modrm = FETCH();
+ UINT8 shift;
+
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ shift = FETCH() & 0x1f;
+ dst = i386_shift_rotate8(modrm, dst, shift);
+ STORE_RM8(modrm, dst);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ dst = READ8(ea);
+ shift = FETCH() & 0x1f;
+ dst = i386_shift_rotate8(modrm, dst, shift);
+ WRITE8(ea, dst);
+ }
+}
+
+static void I386OP(groupD0_8)(void) // Opcode 0xd0
+{
+ UINT8 dst;
+ UINT8 modrm = FETCH();
+
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ dst = i386_shift_rotate8(modrm, dst, 1);
+ STORE_RM8(modrm, dst);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ dst = READ8(ea);
+ dst = i386_shift_rotate8(modrm, dst, 1);
+ WRITE8(ea, dst);
+ }
+}
+
+static void I386OP(groupD2_8)(void) // Opcode 0xd2
+{
+ UINT8 dst;
+ UINT8 modrm = FETCH();
+
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM8(modrm);
+ dst = i386_shift_rotate8(modrm, dst, REG8(CL));
+ STORE_RM8(modrm, dst);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ dst = READ8(ea);
+ dst = i386_shift_rotate8(modrm, dst, REG8(CL));
+ WRITE8(ea, dst);
+ }
+}
+
+static void I386OP(groupF6_8)(void) // Opcode 0xf6
+{
+ UINT8 modrm = FETCH();
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* TEST Rm8, i8 */
+ if( modrm >= 0xc0 ) {
+ UINT8 dst = LOAD_RM8(modrm);
+ UINT8 src = FETCH();
+ dst &= src;
+ I.CF = I.OF = I.AF = 0;
+ SetSZPF8(dst);
+ CYCLES(CYCLES_TEST_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ UINT8 dst = READ8(ea);
+ UINT8 src = FETCH();
+ dst &= src;
+ I.CF = I.OF = I.AF = 0;
+ SetSZPF8(dst);
+ CYCLES(CYCLES_TEST_IMM_MEM);
+ }
+ break;
+ case 2: /* NOT Rm8 */
+ if( modrm >= 0xc0 ) {
+ UINT8 dst = LOAD_RM8(modrm);
+ dst = ~dst;
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_NOT_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ UINT8 dst = READ8(ea);
+ dst = ~dst;
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_NOT_MEM);
+ }
+ break;
+ case 3: /* NEG Rm8 */
+ if( modrm >= 0xc0 ) {
+ UINT8 dst = LOAD_RM8(modrm);
+ dst = SUB8( 0, dst );
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_NEG_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ UINT8 dst = READ8(ea);
+ dst = SUB8( 0, dst );
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_NEG_MEM);
+ }
+ break;
+ case 4: /* MUL AL, Rm8 */
+ {
+ UINT16 result;
+ UINT8 src, dst;
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ CYCLES(CYCLES_MUL8_ACC_REG); /* TODO: Correct multiply timing */
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ CYCLES(CYCLES_MUL8_ACC_MEM); /* TODO: Correct multiply timing */
+ }
+
+ dst = REG8(AL);
+ result = (UINT16)src * (UINT16)dst;
+ REG16(AX) = (UINT16)result;
+
+ I.CF = I.OF = (REG16(AX) > 0xff);
+ }
+ break;
+ case 5: /* IMUL AL, Rm8 */
+ {
+ INT16 result;
+ INT16 src, dst;
+ if( modrm >= 0xc0 ) {
+ src = (INT16)(INT8)LOAD_RM8(modrm);
+ CYCLES(CYCLES_IMUL8_ACC_REG); /* TODO: Correct multiply timing */
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = (INT16)(INT8)READ8(ea);
+ CYCLES(CYCLES_IMUL8_ACC_MEM); /* TODO: Correct multiply timing */
+ }
+
+ dst = (INT16)(INT8)REG8(AL);
+ result = src * dst;
+
+ REG16(AX) = (UINT16)result;
+
+ I.CF = I.OF = !(result == (INT16)(INT8)result);
+ }
+ break;
+ case 6: /* DIV AL, Rm8 */
+ {
+ UINT16 quotient, remainder, result;
+ UINT8 src;
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ CYCLES(CYCLES_DIV8_ACC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ CYCLES(CYCLES_DIV8_ACC_MEM);
+ }
+
+ quotient = (UINT16)REG16(AX);
+ if( src ) {
+ remainder = quotient % (UINT16)src;
+ result = quotient / (UINT16)src;
+ if( result > 0xff ) {
+ /* TODO: Divide error */
+ } else {
+ REG8(AH) = (UINT8)remainder & 0xff;
+ REG8(AL) = (UINT8)result & 0xff;
+ }
+ } else {
+ /* TODO: Divide by zero */
+ }
+ }
+ break;
+ case 7: /* IDIV AL, Rm8 */
+ {
+ INT16 quotient, remainder, result;
+ UINT8 src;
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM8(modrm);
+ CYCLES(CYCLES_IDIV8_ACC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ src = READ8(ea);
+ CYCLES(CYCLES_IDIV8_ACC_MEM);
+ }
+
+ quotient = (INT16)REG16(AX);
+ if( src ) {
+ remainder = quotient % (INT16)(INT8)src;
+ result = quotient / (INT16)(INT8)src;
+ if( result > 0xff ) {
+ /* TODO: Divide error */
+ } else {
+ REG8(AH) = (UINT8)remainder & 0xff;
+ REG8(AL) = (UINT8)result & 0xff;
+ }
+ } else {
+ /* TODO: Divide by zero */
+ }
+ }
+ break;
+ }
+}
+
+static void I386OP(groupFE_8)(void) // Opcode 0xfe
+{
+ UINT8 modrm = FETCH();
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* INC Rm8 */
+ if( modrm >= 0xc0 ) {
+ UINT8 dst = LOAD_RM8(modrm);
+ dst = INC8(dst);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_INC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ UINT8 dst = READ8(ea);
+ dst = INC8(dst);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_INC_MEM);
+ }
+ break;
+ case 1: /* DEC Rm8 */
+ if( modrm >= 0xc0 ) {
+ UINT8 dst = LOAD_RM8(modrm);
+ dst = DEC8(dst);
+ STORE_RM8(modrm, dst);
+ CYCLES(CYCLES_DEC_REG);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ UINT8 dst = READ8(ea);
+ dst = DEC8(dst);
+ WRITE8(ea, dst);
+ CYCLES(CYCLES_DEC_MEM);
+ }
+ break;
+ case 6: /* PUSH Rm8 */
+ {
+ UINT8 value;
+ if( modrm >= 0xc0 ) {
+ value = LOAD_RM8(modrm);
+ } else {
+ UINT32 ea = GetEA(modrm);
+ value = READ8(ea);
+ }
+ if( I.operand_size ) {
+ PUSH32(value);
+ } else {
+ PUSH16(value);
+ }
+ CYCLES(CYCLES_PUSH_RM);
+ }
+ break;
+ default:
+ fatalerror("i386: groupFE_8 /%d unimplemented", (modrm >> 3) & 0x7);
+ break;
+ }
+}
+
+
+
+static void I386OP(segment_CS)(void) // Opcode 0x2e
+{
+ I.segment_prefix = 1;
+ I.segment_override = CS;
+
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(segment_DS)(void) // Opcode 0x3e
+{
+ I.segment_prefix = 1;
+ I.segment_override = DS;
+ CYCLES(0); // TODO: Specify cycle count
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(segment_ES)(void) // Opcode 0x26
+{
+ I.segment_prefix = 1;
+ I.segment_override = ES;
+ CYCLES(0); // TODO: Specify cycle count
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(segment_FS)(void) // Opcode 0x64
+{
+ I.segment_prefix = 1;
+ I.segment_override = FS;
+ CYCLES(1); // TODO: Specify cycle count
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(segment_GS)(void) // Opcode 0x65
+{
+ I.segment_prefix = 1;
+ I.segment_override = GS;
+ CYCLES(1); // TODO: Specify cycle count
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(segment_SS)(void) // Opcode 0x36
+{
+ I.segment_prefix = 1;
+ I.segment_override = SS;
+ CYCLES(0); // TODO: Specify cycle count
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(operand_size)(void) // Opcode 0x66
+{
+ I.operand_size ^= 1;
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(address_size)(void) // Opcode 0x67
+{
+ I.address_size ^= 1;
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(nop)(void) // Opcode 0x90
+{
+ CYCLES(CYCLES_NOP);
+}
+
+static void I386OP(int3)(void) // Opcode 0xcc
+{
+ CYCLES(CYCLES_INT3);
+ i386_trap(3, 1);
+}
+
+static void I386OP(int)(void) // Opcode 0xcd
+{
+ int interrupt = FETCH();
+ CYCLES(CYCLES_INT);
+ i386_trap(interrupt, 1);
+}
+
+static void I386OP(into)(void) // Opcode 0xce
+{
+ if( I.OF ) {
+ i386_trap(4, 1);
+ CYCLES(CYCLES_INTO_OF1);
+ }
+ else
+ {
+ CYCLES(CYCLES_INTO_OF0);
+ }
+}
+
+static void I386OP(escape)(void) // Opcodes 0xd8 - 0xdf
+{
+ UINT8 modrm = FETCH();
+ CYCLES(3); // TODO: confirm this
+ (void) LOAD_RM8(modrm);
+}
+
+static void I386OP(hlt)(void) // Opcode 0xf4
+{
+ // TODO: We need to raise an exception in protected mode and when
+ // the current privilege level is not zero
+ I.halted = 1;
+ I.cycles = 0;
+ CYCLES(CYCLES_HLT);
+}
+
+static void I386OP(decimal_adjust)(int direction)
+{
+ UINT8 tmpAL = REG8(AL);
+
+ if (I.AF || ((REG8(AL) & 0xf) > 9))
+ {
+ REG8(AL) = REG8(AL) + (direction * 0x06);
+ I.AF = 1;
+ if (REG8(AL) & 0x100)
+ I.CF = 1;
+ if (direction > 0)
+ tmpAL = REG8(AL);
+ }
+
+ if (I.CF || (tmpAL > 0x9f))
+ {
+ REG8(AL) += (direction * 0x60);
+ I.CF = 1;
+ }
+
+ SetSZPF8(REG8(AL));
+}
+
+static void I386OP(daa)(void) // Opcode 0x27
+{
+ I386OP(decimal_adjust)(+1);
+ CYCLES(CYCLES_DAA);
+}
+
+static void I386OP(das)(void) // Opcode 0x2f
+{
+ I386OP(decimal_adjust)(-1);
+ CYCLES(CYCLES_DAS);
+}
+
+static void I386OP(aaa)(void) // Opcode 0x37
+{
+ if( (REG8(AL) & 0x0f) || I.AF != 0 ) {
+ REG16(AX) = REG16(AX) + 6;
+ REG8(AH) = REG8(AH) + 1;
+ I.AF = 1;
+ I.CF = 1;
+ } else {
+ I.AF = 0;
+ I.CF = 0;
+ }
+ REG8(AL) = REG8(AL) & 0x0f;
+ CYCLES(CYCLES_AAA);
+}
+
+static void I386OP(aas)(void) // Opcode 0x3f
+{
+ if (I.AF || ((REG8(AL) & 0xf) > 9))
+ {
+ REG16(AX) -= 6;
+ REG8(AH) -= 1;
+ I.AF = 1;
+ I.CF = 1;
+ }
+ else
+ {
+ I.AF = 0;
+ I.CF = 0;
+ }
+ REG8(AL) &= 0x0f;
+ CYCLES(CYCLES_AAS);
+}
+
+static void I386OP(aad)(void) // Opcode 0xd5
+{
+ UINT8 tempAL = REG8(AL);
+ UINT8 tempAH = REG8(AH);
+ UINT8 i = FETCH();
+
+ REG8(AL) = (tempAL + (tempAH * i)) & 0xff;
+ REG8(AH) = 0;
+ SetSZPF8( REG8(AL) );
+ CYCLES(CYCLES_AAD);
+}
+
+static void I386OP(aam)(void) // Opcode 0xd4
+{
+ UINT8 tempAL = REG8(AL);
+ UINT8 i = FETCH();
+
+ REG8(AH) = tempAL / i;
+ REG8(AL) = tempAL % i;
+ SetSZPF8( REG8(AL) );
+ CYCLES(CYCLES_AAM);
+}
+
+static void I386OP(clts)(void) // Opcode 0x0f 0x06
+{
+ // TODO: #GP(0) is executed
+ I.cr[0] &= ~0x08; /* clear TS bit */
+ CYCLES(CYCLES_CLTS);
+}
+
+static void I386OP(wait)(void) // Opcode 0x9B
+{
+ // TODO
+}
+
+static void I386OP(lock)(void) // Opcode 0xf0
+{
+ CYCLES(CYCLES_LOCK); // TODO: Determine correct cycle count
+ I386OP(decode_opcode)();
+}
+
+static void I386OP(mov_r32_tr)(void) // Opcode 0x0f 24
+{
+ FETCH();
+ CYCLES(1); // TODO: correct cycle count
+}
+
+static void I386OP(mov_tr_r32)(void) // Opcode 0x0f 26
+{
+ FETCH();
+ CYCLES(1); // TODO: correct cycle count
+}
+
+static void I386OP(unimplemented)(void)
+{
+ fatalerror("i386: Unimplemented opcode %02X at %08X", I.opcode, I.pc - 1 );
+}
+
+static void I386OP(invalid)(void)
+{
+ //i386_trap(6);
+ fatalerror("i386: Invalid opcode %02X at %08X", I.opcode, I.pc - 1);
+}