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Diffstat (limited to 'trunk/src/emu/cpu/i386/i386op16.c')
-rw-r--r--trunk/src/emu/cpu/i386/i386op16.c3484
1 files changed, 3484 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/i386/i386op16.c b/trunk/src/emu/cpu/i386/i386op16.c
new file mode 100644
index 00000000000..8b265e09761
--- /dev/null
+++ b/trunk/src/emu/cpu/i386/i386op16.c
@@ -0,0 +1,3484 @@
+static UINT16 I386OP(shift_rotate16)(i386_state *cpustate, UINT8 modrm, UINT32 value, UINT8 shift)
+{
+ UINT16 src = value;
+ UINT16 dst = value;
+
+ if( shift == 0 ) {
+ CYCLES_RM(cpustate,modrm, 3, 7);
+ } else if( shift == 1 ) {
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* ROL rm16, 1 */
+ cpustate->CF = (src & 0x8000) ? 1 : 0;
+ dst = (src << 1) + cpustate->CF;
+ cpustate->OF = ((src ^ dst) & 0x8000) ? 1 : 0;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 1: /* ROR rm16, 1 */
+ cpustate->CF = (src & 0x1) ? 1 : 0;
+ dst = (cpustate->CF << 15) | (src >> 1);
+ cpustate->OF = ((src ^ dst) & 0x8000) ? 1 : 0;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 2: /* RCL rm16, 1 */
+ dst = (src << 1) + cpustate->CF;
+ cpustate->CF = (src & 0x8000) ? 1 : 0;
+ cpustate->OF = ((src ^ dst) & 0x8000) ? 1 : 0;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 3: /* RCR rm16, 1 */
+ dst = (cpustate->CF << 15) | (src >> 1);
+ cpustate->CF = src & 0x1;
+ cpustate->OF = ((src ^ dst) & 0x8000) ? 1 : 0;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 4: /* SHL/SAL rm16, 1 */
+ case 6:
+ dst = src << 1;
+ cpustate->CF = (src & 0x8000) ? 1 : 0;
+ cpustate->OF = (((cpustate->CF << 15) ^ dst) & 0x8000) ? 1 : 0;
+ SetSZPF16(dst);
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 5: /* SHR rm16, 1 */
+ dst = src >> 1;
+ cpustate->CF = src & 0x1;
+ cpustate->OF = (dst & 0x8000) ? 1 : 0;
+ SetSZPF16(dst);
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 7: /* SAR rm16, 1 */
+ dst = (INT16)(src) >> 1;
+ cpustate->CF = src & 0x1;
+ cpustate->OF = 0;
+ SetSZPF16(dst);
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ }
+ } else {
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* ROL rm16, i8 */
+ dst = ((src & ((UINT16)0xffff >> shift)) << shift) |
+ ((src & ((UINT16)0xffff << (16-shift))) >> (16-shift));
+ cpustate->CF = (src >> (16-shift)) & 0x1;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 1: /* ROR rm16, i8 */
+ dst = ((src & ((UINT16)0xffff << shift)) >> shift) |
+ ((src & ((UINT16)0xffff >> (16-shift))) << (16-shift));
+ cpustate->CF = (src >> (shift-1)) & 0x1;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 2: /* RCL rm16, i8 */
+ dst = ((src & ((UINT16)0xffff >> shift)) << shift) |
+ ((src & ((UINT16)0xffff << (17-shift))) >> (17-shift)) |
+ (cpustate->CF << (shift-1));
+ cpustate->CF = (src >> (16-shift)) & 0x1;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 3: /* RCR rm16, i8 */
+ dst = ((src & ((UINT16)0xffff << shift)) >> shift) |
+ ((src & ((UINT16)0xffff >> (16-shift))) << (17-shift)) |
+ (cpustate->CF << (16-shift));
+ cpustate->CF = (src >> (shift-1)) & 0x1;
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM);
+ break;
+ case 4: /* SHL/SAL rm16, i8 */
+ case 6:
+ dst = src << shift;
+ cpustate->CF = (src & (1 << (16-shift))) ? 1 : 0;
+ SetSZPF16(dst);
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 5: /* SHR rm16, i8 */
+ dst = src >> shift;
+ cpustate->CF = (src & (1 << (shift-1))) ? 1 : 0;
+ SetSZPF16(dst);
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ case 7: /* SAR rm16, i8 */
+ dst = (INT16)src >> shift;
+ cpustate->CF = (src & (1 << (shift-1))) ? 1 : 0;
+ SetSZPF16(dst);
+ CYCLES_RM(cpustate,modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM);
+ break;
+ }
+
+ }
+ return dst;
+}
+
+
+
+static void I386OP(adc_rm16_r16)(i386_state *cpustate) // Opcode 0x11
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(adc_r16_rm16)(i386_state *cpustate) // Opcode 0x13
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(adc_ax_i16)(i386_state *cpustate) // Opcode 0x15
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ REG16(AX) = dst;
+ CYCLES(cpustate,CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(add_rm16_r16)(i386_state *cpustate) // Opcode 0x01
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = ADD16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = ADD16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(add_r16_rm16)(i386_state *cpustate) // Opcode 0x03
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ dst = ADD16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ dst = ADD16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(add_ax_i16)(i386_state *cpustate) // Opcode 0x05
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ dst = ADD16(cpustate,dst, src);
+ REG16(AX) = dst;
+ CYCLES(cpustate,CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(and_rm16_r16)(i386_state *cpustate) // Opcode 0x21
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = AND16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = AND16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(and_r16_rm16)(i386_state *cpustate) // Opcode 0x23
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ dst = AND16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ dst = AND16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(and_ax_i16)(i386_state *cpustate) // Opcode 0x25
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ dst = AND16(cpustate,dst, src);
+ REG16(AX) = dst;
+ CYCLES(cpustate,CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(bsf_r16_rm16)(i386_state *cpustate) // Opcode 0x0f bc
+{
+ UINT16 src, dst, temp;
+ UINT8 modrm = FETCH(cpustate);
+
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ }
+
+ dst = 0;
+
+ if( src == 0 ) {
+ cpustate->ZF = 1;
+ } else {
+ cpustate->ZF = 0;
+ temp = 0;
+ while( (src & (1 << temp)) == 0 ) {
+ temp++;
+ dst = temp;
+ CYCLES(cpustate,CYCLES_BSF);
+ }
+ }
+ CYCLES(cpustate,CYCLES_BSF_BASE);
+ STORE_REG16(modrm, dst);
+}
+
+static void I386OP(bsr_r16_rm16)(i386_state *cpustate) // Opcode 0x0f bd
+{
+ UINT16 src, dst, temp;
+ UINT8 modrm = FETCH(cpustate);
+
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ }
+
+ dst = 0;
+
+ if( src == 0 ) {
+ cpustate->ZF = 1;
+ } else {
+ cpustate->ZF = 0;
+ dst = temp = 15;
+ while( (src & (1 << temp)) == 0 ) {
+ temp--;
+ dst = temp;
+ CYCLES(cpustate,CYCLES_BSR);
+ }
+ }
+ CYCLES(cpustate,CYCLES_BSR_BASE);
+ STORE_REG16(modrm, dst);
+}
+
+
+static void I386OP(bt_rm16_r16)(i386_state *cpustate) // Opcode 0x0f a3
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+
+ CYCLES(cpustate,CYCLES_BT_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+
+ CYCLES(cpustate,CYCLES_BT_REG_MEM);
+ }
+}
+
+static void I386OP(btc_rm16_r16)(i386_state *cpustate) // Opcode 0x0f bb
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst ^= (1 << bit);
+
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_BTC_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst ^= (1 << bit);
+
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_BTC_REG_MEM);
+ }
+}
+
+static void I386OP(btr_rm16_r16)(i386_state *cpustate) // Opcode 0x0f b3
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst &= ~(1 << bit);
+
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_BTR_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst &= ~(1 << bit);
+
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_BTR_REG_MEM);
+ }
+}
+
+static void I386OP(bts_rm16_r16)(i386_state *cpustate) // Opcode 0x0f ab
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst |= (1 << bit);
+
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_BTS_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 bit = LOAD_REG16(modrm);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst |= (1 << bit);
+
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_BTS_REG_MEM);
+ }
+}
+
+static void I386OP(call_abs16)(i386_state *cpustate) // Opcode 0x9a
+{
+ UINT16 offset = FETCH16(cpustate);
+ UINT16 ptr = FETCH16(cpustate);
+
+ if( PROTECTED_MODE && !V8086_MODE)
+ {
+ i386_protected_mode_call(cpustate,ptr,offset,0,0);
+ }
+ else
+ {
+ PUSH16(cpustate, cpustate->sreg[CS].selector );
+ PUSH16(cpustate, cpustate->eip );
+ cpustate->sreg[CS].selector = ptr;
+ cpustate->performed_intersegment_jump = 1;
+ cpustate->eip = offset;
+ i386_load_segment_descriptor(cpustate,CS);
+ }
+ CYCLES(cpustate,CYCLES_CALL_INTERSEG); /* TODO: Timing = 17 + m */
+ CHANGE_PC(cpustate,cpustate->eip);
+}
+
+static void I386OP(call_rel16)(i386_state *cpustate) // Opcode 0xe8
+{
+ INT16 disp = FETCH16(cpustate);
+
+ PUSH16(cpustate, cpustate->eip );
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_CALL); /* TODO: Timing = 7 + m */
+}
+
+static void I386OP(cbw)(i386_state *cpustate) // Opcode 0x98
+{
+ REG16(AX) = (INT16)((INT8)REG8(AL));
+ CYCLES(cpustate,CYCLES_CBW);
+}
+
+static void I386OP(cmp_rm16_r16)(i386_state *cpustate) // Opcode 0x39
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_REG_MEM);
+ }
+}
+
+static void I386OP(cmp_r16_rm16)(i386_state *cpustate) // Opcode 0x3b
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_MEM_REG);
+ }
+}
+
+static void I386OP(cmp_ax_i16)(i386_state *cpustate) // Opcode 0x3d
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_IMM_ACC);
+}
+
+static void I386OP(cmpsw)(i386_state *cpustate) // Opcode 0xa7
+{
+ UINT32 eas, ead;
+ UINT16 src, dst;
+ if( cpustate->segment_prefix ) {
+ eas = i386_translate(cpustate, cpustate->segment_override, cpustate->address_size ? REG32(ESI) : REG16(SI) );
+ } else {
+ eas = i386_translate(cpustate, DS, cpustate->address_size ? REG32(ESI) : REG16(SI) );
+ }
+ ead = i386_translate(cpustate, ES, cpustate->address_size ? REG32(EDI) : REG16(DI) );
+ src = READ16(cpustate,eas);
+ dst = READ16(cpustate,ead);
+ SUB16(cpustate,dst, src);
+ BUMP_SI(cpustate,2);
+ BUMP_DI(cpustate,2);
+ CYCLES(cpustate,CYCLES_CMPS);
+}
+
+static void I386OP(cwd)(i386_state *cpustate) // Opcode 0x99
+{
+ if( REG16(AX) & 0x8000 ) {
+ REG16(DX) = 0xffff;
+ } else {
+ REG16(DX) = 0x0000;
+ }
+ CYCLES(cpustate,CYCLES_CWD);
+}
+
+static void I386OP(dec_ax)(i386_state *cpustate) // Opcode 0x48
+{
+ REG16(AX) = DEC16(cpustate, REG16(AX) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(dec_cx)(i386_state *cpustate) // Opcode 0x49
+{
+ REG16(CX) = DEC16(cpustate, REG16(CX) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(dec_dx)(i386_state *cpustate) // Opcode 0x4a
+{
+ REG16(DX) = DEC16(cpustate, REG16(DX) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(dec_bx)(i386_state *cpustate) // Opcode 0x4b
+{
+ REG16(BX) = DEC16(cpustate, REG16(BX) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(dec_sp)(i386_state *cpustate) // Opcode 0x4c
+{
+ REG16(SP) = DEC16(cpustate, REG16(SP) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(dec_bp)(i386_state *cpustate) // Opcode 0x4d
+{
+ REG16(BP) = DEC16(cpustate, REG16(BP) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(dec_si)(i386_state *cpustate) // Opcode 0x4e
+{
+ REG16(SI) = DEC16(cpustate, REG16(SI) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(dec_di)(i386_state *cpustate) // Opcode 0x4f
+{
+ REG16(DI) = DEC16(cpustate, REG16(DI) );
+ CYCLES(cpustate,CYCLES_DEC_REG);
+}
+
+static void I386OP(imul_r16_rm16)(i386_state *cpustate) // Opcode 0x0f af
+{
+ UINT8 modrm = FETCH(cpustate);
+ INT32 result;
+ INT32 src, dst;
+ if( modrm >= 0xc0 ) {
+ src = (INT32)(INT16)LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_IMUL16_REG_REG); /* TODO: Correct multiply timing */
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = (INT32)(INT16)READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_IMUL16_REG_MEM); /* TODO: Correct multiply timing */
+ }
+
+ dst = (INT32)(INT16)LOAD_REG16(modrm);
+ result = src * dst;
+
+ STORE_REG16(modrm, (UINT16)result);
+
+ cpustate->CF = cpustate->OF = !(result == (INT32)(INT16)result);
+}
+
+static void I386OP(imul_r16_rm16_i16)(i386_state *cpustate) // Opcode 0x69
+{
+ UINT8 modrm = FETCH(cpustate);
+ INT32 result;
+ INT32 src, dst;
+ if( modrm >= 0xc0 ) {
+ dst = (INT32)(INT16)LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_IMUL16_REG_IMM_REG); /* TODO: Correct multiply timing */
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ dst = (INT32)(INT16)READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_IMUL16_MEM_IMM_REG); /* TODO: Correct multiply timing */
+ }
+
+ src = (INT32)(INT16)FETCH16(cpustate);
+ result = src * dst;
+
+ STORE_REG16(modrm, (UINT16)result);
+
+ cpustate->CF = cpustate->OF = !(result == (INT32)(INT16)result);
+}
+
+static void I386OP(imul_r16_rm16_i8)(i386_state *cpustate) // Opcode 0x6b
+{
+ UINT8 modrm = FETCH(cpustate);
+ INT32 result;
+ INT32 src, dst;
+ if( modrm >= 0xc0 ) {
+ dst = (INT32)(INT16)LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_IMUL16_REG_IMM_REG); /* TODO: Correct multiply timing */
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ dst = (INT32)(INT16)READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_IMUL16_MEM_IMM_REG); /* TODO: Correct multiply timing */
+ }
+
+ src = (INT32)(INT8)FETCH(cpustate);
+ result = src * dst;
+
+ STORE_REG16(modrm, (UINT16)result);
+
+ cpustate->CF = cpustate->OF = !(result == (INT32)(INT16)result);
+}
+
+static void I386OP(in_ax_i8)(i386_state *cpustate) // Opcode 0xe5
+{
+ UINT16 port = FETCH(cpustate);
+ UINT16 data = READPORT16(cpustate, port);
+ REG16(AX) = data;
+ CYCLES(cpustate,CYCLES_IN_VAR);
+}
+
+static void I386OP(in_ax_dx)(i386_state *cpustate) // Opcode 0xed
+{
+ UINT16 port = REG16(DX);
+ UINT16 data = READPORT16(cpustate, port);
+ REG16(AX) = data;
+ CYCLES(cpustate,CYCLES_IN);
+}
+
+static void I386OP(inc_ax)(i386_state *cpustate) // Opcode 0x40
+{
+ REG16(AX) = INC16(cpustate, REG16(AX) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(inc_cx)(i386_state *cpustate) // Opcode 0x41
+{
+ REG16(CX) = INC16(cpustate, REG16(CX) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(inc_dx)(i386_state *cpustate) // Opcode 0x42
+{
+ REG16(DX) = INC16(cpustate, REG16(DX) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(inc_bx)(i386_state *cpustate) // Opcode 0x43
+{
+ REG16(BX) = INC16(cpustate, REG16(BX) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(inc_sp)(i386_state *cpustate) // Opcode 0x44
+{
+ REG16(SP) = INC16(cpustate, REG16(SP) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(inc_bp)(i386_state *cpustate) // Opcode 0x45
+{
+ REG16(BP) = INC16(cpustate, REG16(BP) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(inc_si)(i386_state *cpustate) // Opcode 0x46
+{
+ REG16(SI) = INC16(cpustate, REG16(SI) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(inc_di)(i386_state *cpustate) // Opcode 0x47
+{
+ REG16(DI) = INC16(cpustate, REG16(DI) );
+ CYCLES(cpustate,CYCLES_INC_REG);
+}
+
+static void I386OP(iret16)(i386_state *cpustate) // Opcode 0xcf
+{
+ if( PROTECTED_MODE )
+ {
+ i386_protected_mode_iret(cpustate,0);
+ }
+ else
+ {
+ /* TODO: #SS(0) exception */
+ /* TODO: #GP(0) exception */
+ cpustate->eip = POP16(cpustate);
+ cpustate->sreg[CS].selector = POP16(cpustate);
+ set_flags(cpustate, POP16(cpustate) );
+ i386_load_segment_descriptor(cpustate,CS);
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ CYCLES(cpustate,CYCLES_IRET);
+}
+
+static void I386OP(ja_rel16)(i386_state *cpustate) // Opcode 0x0f 87
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->CF == 0 && cpustate->ZF == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jbe_rel16)(i386_state *cpustate) // Opcode 0x0f 86
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->CF != 0 || cpustate->ZF != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jc_rel16)(i386_state *cpustate) // Opcode 0x0f 82
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->CF != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jg_rel16)(i386_state *cpustate) // Opcode 0x0f 8f
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->ZF == 0 && (cpustate->SF == cpustate->OF) ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jge_rel16)(i386_state *cpustate) // Opcode 0x0f 8d
+{
+ INT16 disp = FETCH16(cpustate);
+ if( (cpustate->SF == cpustate->OF) ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jl_rel16)(i386_state *cpustate) // Opcode 0x0f 8c
+{
+ INT16 disp = FETCH16(cpustate);
+ if( (cpustate->SF != cpustate->OF) ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jle_rel16)(i386_state *cpustate) // Opcode 0x0f 8e
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->ZF != 0 || (cpustate->SF != cpustate->OF) ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jnc_rel16)(i386_state *cpustate) // Opcode 0x0f 83
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->CF == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jno_rel16)(i386_state *cpustate) // Opcode 0x0f 81
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->OF == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jnp_rel16)(i386_state *cpustate) // Opcode 0x0f 8b
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->PF == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jns_rel16)(i386_state *cpustate) // Opcode 0x0f 89
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->SF == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jnz_rel16)(i386_state *cpustate) // Opcode 0x0f 85
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->ZF == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jo_rel16)(i386_state *cpustate) // Opcode 0x0f 80
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->OF != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jp_rel16)(i386_state *cpustate) // Opcode 0x0f 8a
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->PF != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(js_rel16)(i386_state *cpustate) // Opcode 0x0f 88
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->SF != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jz_rel16)(i386_state *cpustate) // Opcode 0x0f 84
+{
+ INT16 disp = FETCH16(cpustate);
+ if( cpustate->ZF != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCC_FULL_DISP_NOBRANCH);
+ }
+}
+
+static void I386OP(jcxz16)(i386_state *cpustate) // Opcode 0xe3
+{
+ INT8 disp = FETCH(cpustate);
+ if( REG16(CX) == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JCXZ); /* TODO: Timing = 9 + m */
+ } else {
+ CYCLES(cpustate,CYCLES_JCXZ_NOBRANCH);
+ }
+}
+
+static void I386OP(jmp_rel16)(i386_state *cpustate) // Opcode 0xe9
+{
+ INT16 disp = FETCH16(cpustate);
+
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_JMP); /* TODO: Timing = 7 + m */
+}
+
+static void I386OP(jmp_abs16)(i386_state *cpustate) // Opcode 0xea
+{
+ UINT16 address = FETCH16(cpustate);
+ UINT16 segment = FETCH16(cpustate);
+
+ if( PROTECTED_MODE && !V8086_MODE)
+ {
+ i386_protected_mode_jump(cpustate,segment,address,0,0);
+ }
+ else
+ {
+ cpustate->eip = address;
+ cpustate->sreg[CS].selector = segment;
+ cpustate->performed_intersegment_jump = 1;
+ i386_load_segment_descriptor(cpustate,CS);
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ CYCLES(cpustate,CYCLES_JMP_INTERSEG);
+}
+
+static void I386OP(lea16)(i386_state *cpustate) // Opcode 0x8d
+{
+ UINT8 modrm = FETCH(cpustate);
+ UINT32 ea = GetNonTranslatedEA(cpustate,modrm);
+ STORE_REG16(modrm, ea);
+ CYCLES(cpustate,CYCLES_LEA);
+}
+
+static void I386OP(enter16)(i386_state *cpustate) // Opcode 0xc8
+{
+ UINT16 framesize = FETCH16(cpustate);
+ UINT8 level = FETCH(cpustate) % 32;
+ UINT8 x;
+ UINT16 frameptr;
+ PUSH16(cpustate,REG16(BP));
+
+ if(!STACK_32BIT)
+ frameptr = REG16(SP);
+ else
+ frameptr = REG32(ESP);
+
+ if(level > 0)
+ {
+ for(x=1;x<level-1;x++)
+ {
+ REG16(BP) -= 2;
+ PUSH16(cpustate,READ16(cpustate,REG16(BP)));
+ }
+ PUSH16(cpustate,frameptr);
+ }
+ REG16(BP) = frameptr;
+ if(!STACK_32BIT)
+ REG16(SP) -= framesize;
+ else
+ REG32(ESP) -= framesize;
+ CYCLES(cpustate,CYCLES_ENTER);
+}
+
+static void I386OP(leave16)(i386_state *cpustate) // Opcode 0xc9
+{
+ if(!STACK_32BIT)
+ REG16(SP) = REG16(BP);
+ else
+ REG32(ESP) = REG32(EBP);
+ REG16(BP) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_LEAVE);
+}
+
+static void I386OP(lodsw)(i386_state *cpustate) // Opcode 0xad
+{
+ UINT32 eas;
+ if( cpustate->segment_prefix ) {
+ eas = i386_translate(cpustate, cpustate->segment_override, cpustate->address_size ? REG32(ESI) : REG16(SI) );
+ } else {
+ eas = i386_translate(cpustate, DS, cpustate->address_size ? REG32(ESI) : REG16(SI) );
+ }
+ REG16(AX) = READ16(cpustate,eas);
+ BUMP_SI(cpustate,2);
+ CYCLES(cpustate,CYCLES_LODS);
+}
+
+static void I386OP(loop16)(i386_state *cpustate) // Opcode 0xe2
+{
+ INT8 disp = FETCH(cpustate);
+ REG16(CX)--;
+ if( REG16(CX) != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ CYCLES(cpustate,CYCLES_LOOP); /* TODO: Timing = 11 + m */
+}
+
+static void I386OP(loopne16)(i386_state *cpustate) // Opcode 0xe0
+{
+ INT8 disp = FETCH(cpustate);
+ REG16(CX)--;
+ if( REG16(CX) != 0 && cpustate->ZF == 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ CYCLES(cpustate,CYCLES_LOOPNZ); /* TODO: Timing = 11 + m */
+}
+
+static void I386OP(loopz16)(i386_state *cpustate) // Opcode 0xe1
+{
+ INT8 disp = FETCH(cpustate);
+ REG16(CX)--;
+ if( REG16(CX) != 0 && cpustate->ZF != 0 ) {
+ if (cpustate->sreg[CS].d)
+ {
+ cpustate->eip += disp;
+ }
+ else
+ {
+ cpustate->eip = (cpustate->eip + disp) & 0xffff;
+ }
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ CYCLES(cpustate,CYCLES_LOOPZ); /* TODO: Timing = 11 + m */
+}
+
+static void I386OP(mov_rm16_r16)(i386_state *cpustate) // Opcode 0x89
+{
+ UINT16 src;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ STORE_RM16(modrm, src);
+ CYCLES(cpustate,CYCLES_MOV_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ WRITE16(cpustate,ea, src);
+ CYCLES(cpustate,CYCLES_MOV_REG_MEM);
+ }
+}
+
+static void I386OP(mov_r16_rm16)(i386_state *cpustate) // Opcode 0x8b
+{
+ UINT16 src;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ STORE_REG16(modrm, src);
+ CYCLES(cpustate,CYCLES_MOV_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ STORE_REG16(modrm, src);
+ CYCLES(cpustate,CYCLES_MOV_MEM_REG);
+ }
+}
+
+static void I386OP(mov_rm16_i16)(i386_state *cpustate) // Opcode 0xc7
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 value = FETCH16(cpustate);
+ STORE_RM16(modrm, value);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 value = FETCH16(cpustate);
+ WRITE16(cpustate,ea, value);
+ CYCLES(cpustate,CYCLES_MOV_IMM_MEM);
+ }
+}
+
+static void I386OP(mov_ax_m16)(i386_state *cpustate) // Opcode 0xa1
+{
+ UINT32 offset, ea;
+ if( cpustate->address_size ) {
+ offset = FETCH32(cpustate);
+ } else {
+ offset = FETCH16(cpustate);
+ }
+ /* TODO: Not sure if this is correct... */
+ if( cpustate->segment_prefix ) {
+ ea = i386_translate(cpustate, cpustate->segment_override, offset );
+ } else {
+ ea = i386_translate(cpustate, DS, offset );
+ }
+ REG16(AX) = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_MOV_MEM_ACC);
+}
+
+static void I386OP(mov_m16_ax)(i386_state *cpustate) // Opcode 0xa3
+{
+ UINT32 offset, ea;
+ if( cpustate->address_size ) {
+ offset = FETCH32(cpustate);
+ } else {
+ offset = FETCH16(cpustate);
+ }
+ /* TODO: Not sure if this is correct... */
+ if( cpustate->segment_prefix ) {
+ ea = i386_translate(cpustate, cpustate->segment_override, offset );
+ } else {
+ ea = i386_translate(cpustate, DS, offset );
+ }
+ WRITE16(cpustate, ea, REG16(AX) );
+ CYCLES(cpustate,CYCLES_MOV_ACC_MEM);
+}
+
+static void I386OP(mov_ax_i16)(i386_state *cpustate) // Opcode 0xb8
+{
+ REG16(AX) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_cx_i16)(i386_state *cpustate) // Opcode 0xb9
+{
+ REG16(CX) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_dx_i16)(i386_state *cpustate) // Opcode 0xba
+{
+ REG16(DX) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_bx_i16)(i386_state *cpustate) // Opcode 0xbb
+{
+ REG16(BX) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_sp_i16)(i386_state *cpustate) // Opcode 0xbc
+{
+ REG16(SP) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_bp_i16)(i386_state *cpustate) // Opcode 0xbd
+{
+ REG16(BP) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_si_i16)(i386_state *cpustate) // Opcode 0xbe
+{
+ REG16(SI) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(mov_di_i16)(i386_state *cpustate) // Opcode 0xbf
+{
+ REG16(DI) = FETCH16(cpustate);
+ CYCLES(cpustate,CYCLES_MOV_IMM_REG);
+}
+
+static void I386OP(movsw)(i386_state *cpustate) // Opcode 0xa5
+{
+ UINT32 eas, ead;
+ UINT16 v;
+ if( cpustate->segment_prefix ) {
+ eas = i386_translate(cpustate, cpustate->segment_override, cpustate->address_size ? REG32(ESI) : REG16(SI) );
+ } else {
+ eas = i386_translate(cpustate, DS, cpustate->address_size ? REG32(ESI) : REG16(SI) );
+ }
+ ead = i386_translate(cpustate, ES, cpustate->address_size ? REG32(EDI) : REG16(DI) );
+ v = READ16(cpustate,eas);
+ WRITE16(cpustate,ead, v);
+ BUMP_SI(cpustate,2);
+ BUMP_DI(cpustate,2);
+ CYCLES(cpustate,CYCLES_MOVS);
+}
+
+static void I386OP(movsx_r16_rm8)(i386_state *cpustate) // Opcode 0x0f be
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ INT16 src = (INT8)LOAD_RM8(modrm);
+ STORE_REG16(modrm, src);
+ CYCLES(cpustate,CYCLES_MOVSX_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ INT16 src = (INT8)READ8(cpustate,ea);
+ STORE_REG16(modrm, src);
+ CYCLES(cpustate,CYCLES_MOVSX_MEM_REG);
+ }
+}
+
+static void I386OP(movzx_r16_rm8)(i386_state *cpustate) // Opcode 0x0f b6
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 src = (UINT8)LOAD_RM8(modrm);
+ STORE_REG16(modrm, src);
+ CYCLES(cpustate,CYCLES_MOVZX_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 src = (UINT8)READ8(cpustate,ea);
+ STORE_REG16(modrm, src);
+ CYCLES(cpustate,CYCLES_MOVZX_MEM_REG);
+ }
+}
+
+static void I386OP(or_rm16_r16)(i386_state *cpustate) // Opcode 0x09
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = OR16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = OR16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(or_r16_rm16)(i386_state *cpustate) // Opcode 0x0b
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ dst = OR16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ dst = OR16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(or_ax_i16)(i386_state *cpustate) // Opcode 0x0d
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ dst = OR16(cpustate,dst, src);
+ REG16(AX) = dst;
+ CYCLES(cpustate,CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(out_ax_i8)(i386_state *cpustate) // Opcode 0xe7
+{
+ UINT16 port = FETCH(cpustate);
+ UINT16 data = REG16(AX);
+ WRITEPORT16(cpustate, port, data);
+ CYCLES(cpustate,CYCLES_OUT_VAR);
+}
+
+static void I386OP(out_ax_dx)(i386_state *cpustate) // Opcode 0xef
+{
+ UINT16 port = REG16(DX);
+ UINT16 data = REG16(AX);
+ WRITEPORT16(cpustate, port, data);
+ CYCLES(cpustate,CYCLES_OUT);
+}
+
+static void I386OP(pop_ax)(i386_state *cpustate) // Opcode 0x58
+{
+ REG16(AX) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_cx)(i386_state *cpustate) // Opcode 0x59
+{
+ REG16(CX) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_dx)(i386_state *cpustate) // Opcode 0x5a
+{
+ REG16(DX) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_bx)(i386_state *cpustate) // Opcode 0x5b
+{
+ REG16(BX) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_sp)(i386_state *cpustate) // Opcode 0x5c
+{
+ REG16(SP) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_bp)(i386_state *cpustate) // Opcode 0x5d
+{
+ REG16(BP) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_si)(i386_state *cpustate) // Opcode 0x5e
+{
+ REG16(SI) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_di)(i386_state *cpustate) // Opcode 0x5f
+{
+ REG16(DI) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POP_REG_SHORT);
+}
+
+static void I386OP(pop_ds16)(i386_state *cpustate) // Opcode 0x1f
+{
+ cpustate->sreg[DS].selector = POP16(cpustate);
+ if( PROTECTED_MODE ) {
+ i386_load_segment_descriptor(cpustate,DS);
+ } else {
+ i386_load_segment_descriptor(cpustate,DS);
+ }
+ CYCLES(cpustate,CYCLES_POP_SREG);
+}
+
+static void I386OP(pop_es16)(i386_state *cpustate) // Opcode 0x07
+{
+ cpustate->sreg[ES].selector = POP16(cpustate);
+ if( PROTECTED_MODE ) {
+ i386_load_segment_descriptor(cpustate,ES);
+ } else {
+ i386_load_segment_descriptor(cpustate,ES);
+ }
+ CYCLES(cpustate,CYCLES_POP_SREG);
+}
+
+static void I386OP(pop_fs16)(i386_state *cpustate) // Opcode 0x0f a1
+{
+ cpustate->sreg[FS].selector = POP16(cpustate);
+ if( PROTECTED_MODE ) {
+ i386_load_segment_descriptor(cpustate,FS);
+ } else {
+ i386_load_segment_descriptor(cpustate,FS);
+ }
+ CYCLES(cpustate,CYCLES_POP_SREG);
+}
+
+static void I386OP(pop_gs16)(i386_state *cpustate) // Opcode 0x0f a9
+{
+ cpustate->sreg[GS].selector = POP16(cpustate);
+ if( PROTECTED_MODE ) {
+ i386_load_segment_descriptor(cpustate,GS);
+ } else {
+ i386_load_segment_descriptor(cpustate,GS);
+ }
+ CYCLES(cpustate,CYCLES_POP_SREG);
+}
+
+static void I386OP(pop_ss16)(i386_state *cpustate) // Opcode 0x17
+{
+ if(cpustate->IF != 0) // if external interrupts are enabled
+ {
+ cpustate->IF = 0; // reset IF for the next instruction
+ cpustate->delayed_interrupt_enable = 1;
+ }
+
+ cpustate->sreg[SS].selector = POP16(cpustate);
+ if( PROTECTED_MODE ) {
+ i386_load_segment_descriptor(cpustate,SS);
+ } else {
+ i386_load_segment_descriptor(cpustate,SS);
+ }
+ CYCLES(cpustate,CYCLES_POP_SREG);
+}
+
+static void I386OP(pop_rm16)(i386_state *cpustate) // Opcode 0x8f
+{
+ UINT8 modrm = FETCH(cpustate);
+ UINT16 value = POP16(cpustate);
+
+ if( modrm >= 0xc0 ) {
+ STORE_RM16(modrm, value);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ WRITE16(cpustate,ea, value);
+ }
+ CYCLES(cpustate,CYCLES_POP_RM);
+}
+
+static void I386OP(popa)(i386_state *cpustate) // Opcode 0x61
+{
+ REG16(DI) = POP16(cpustate);
+ REG16(SI) = POP16(cpustate);
+ REG16(BP) = POP16(cpustate);
+ REG16(SP) += 2;
+ REG16(BX) = POP16(cpustate);
+ REG16(DX) = POP16(cpustate);
+ REG16(CX) = POP16(cpustate);
+ REG16(AX) = POP16(cpustate);
+ CYCLES(cpustate,CYCLES_POPA);
+}
+
+static void I386OP(popf)(i386_state *cpustate) // Opcode 0x9d
+{
+ UINT16 value = POP16(cpustate);
+ set_flags(cpustate,value);
+ CYCLES(cpustate,CYCLES_POPF);
+}
+
+static void I386OP(push_ax)(i386_state *cpustate) // Opcode 0x50
+{
+ PUSH16(cpustate, REG16(AX) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_cx)(i386_state *cpustate) // Opcode 0x51
+{
+ PUSH16(cpustate, REG16(CX) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_dx)(i386_state *cpustate) // Opcode 0x52
+{
+ PUSH16(cpustate, REG16(DX) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_bx)(i386_state *cpustate) // Opcode 0x53
+{
+ PUSH16(cpustate, REG16(BX) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_sp)(i386_state *cpustate) // Opcode 0x54
+{
+ PUSH16(cpustate, REG16(SP) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_bp)(i386_state *cpustate) // Opcode 0x55
+{
+ PUSH16(cpustate, REG16(BP) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_si)(i386_state *cpustate) // Opcode 0x56
+{
+ PUSH16(cpustate, REG16(SI) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_di)(i386_state *cpustate) // Opcode 0x57
+{
+ PUSH16(cpustate, REG16(DI) );
+ CYCLES(cpustate,CYCLES_PUSH_REG_SHORT);
+}
+
+static void I386OP(push_cs16)(i386_state *cpustate) // Opcode 0x0e
+{
+ PUSH16(cpustate, cpustate->sreg[CS].selector );
+ CYCLES(cpustate,CYCLES_PUSH_SREG);
+}
+
+static void I386OP(push_ds16)(i386_state *cpustate) // Opcode 0x1e
+{
+ PUSH16(cpustate, cpustate->sreg[DS].selector );
+ CYCLES(cpustate,CYCLES_PUSH_SREG);
+}
+
+static void I386OP(push_es16)(i386_state *cpustate) // Opcode 0x06
+{
+ PUSH16(cpustate, cpustate->sreg[ES].selector );
+ CYCLES(cpustate,CYCLES_PUSH_SREG);
+}
+
+static void I386OP(push_fs16)(i386_state *cpustate) // Opcode 0x0f a0
+{
+ PUSH16(cpustate, cpustate->sreg[FS].selector );
+ CYCLES(cpustate,CYCLES_PUSH_SREG);
+}
+
+static void I386OP(push_gs16)(i386_state *cpustate) // Opcode 0x0f a8
+{
+ PUSH16(cpustate, cpustate->sreg[GS].selector );
+ CYCLES(cpustate,CYCLES_PUSH_SREG);
+}
+
+static void I386OP(push_ss16)(i386_state *cpustate) // Opcode 0x16
+{
+ PUSH16(cpustate, cpustate->sreg[SS].selector );
+ CYCLES(cpustate,CYCLES_PUSH_SREG);
+}
+
+static void I386OP(push_i16)(i386_state *cpustate) // Opcode 0x68
+{
+ UINT16 value = FETCH16(cpustate);
+ PUSH16(cpustate,value);
+ CYCLES(cpustate,CYCLES_PUSH_IMM);
+}
+
+static void I386OP(pusha)(i386_state *cpustate) // Opcode 0x60
+{
+ UINT16 temp = REG16(SP);
+ PUSH16(cpustate, REG16(AX) );
+ PUSH16(cpustate, REG16(CX) );
+ PUSH16(cpustate, REG16(DX) );
+ PUSH16(cpustate, REG16(BX) );
+ PUSH16(cpustate, temp );
+ PUSH16(cpustate, REG16(BP) );
+ PUSH16(cpustate, REG16(SI) );
+ PUSH16(cpustate, REG16(DI) );
+ CYCLES(cpustate,CYCLES_PUSHA);
+}
+
+static void I386OP(pushf)(i386_state *cpustate) // Opcode 0x9c
+{
+ PUSH16(cpustate, get_flags(cpustate) & 0xffff );
+ CYCLES(cpustate,CYCLES_PUSHF);
+}
+
+static void I386OP(ret_near16_i16)(i386_state *cpustate) // Opcode 0xc2
+{
+ INT16 disp = FETCH16(cpustate);
+ cpustate->eip = POP16(cpustate);
+ REG16(SP) += disp;
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_RET_IMM); /* TODO: Timing = 10 + m */
+}
+
+static void I386OP(ret_near16)(i386_state *cpustate) // Opcode 0xc3
+{
+ cpustate->eip = POP16(cpustate);
+ CHANGE_PC(cpustate,cpustate->eip);
+ CYCLES(cpustate,CYCLES_RET); /* TODO: Timing = 10 + m */
+}
+
+static void I386OP(sbb_rm16_r16)(i386_state *cpustate) // Opcode 0x19
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(sbb_r16_rm16)(i386_state *cpustate) // Opcode 0x1b
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(sbb_ax_i16)(i386_state *cpustate) // Opcode 0x1d
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ REG16(AX) = dst;
+ CYCLES(cpustate,CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(scasw)(i386_state *cpustate) // Opcode 0xaf
+{
+ UINT32 eas;
+ UINT16 src, dst;
+ eas = i386_translate(cpustate, ES, cpustate->address_size ? REG32(EDI) : REG16(DI) );
+ src = READ16(cpustate,eas);
+ dst = REG16(AX);
+ SUB16(cpustate,dst, src);
+ BUMP_DI(cpustate,2);
+ CYCLES(cpustate,CYCLES_SCAS);
+}
+
+static void I386OP(shld16_i8)(i386_state *cpustate) // Opcode 0x0f a4
+{
+ /* TODO: Correct flags */
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = FETCH(cpustate);
+ if( shift > 31 || shift == 0 ) {
+
+ } else if( shift > 15 ) {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (upper << (shift-16)) | (upper >> (32-shift));
+ SetSZPF16(dst);
+ } else {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (dst << shift) | (upper >> (16-shift));
+ SetSZPF16(dst);
+ }
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_SHLD_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = FETCH(cpustate);
+ if( shift > 31 || shift == 0 ) {
+
+ } else if( shift > 15 ) {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (upper << (shift-16)) | (upper >> (32-shift));
+ SetSZPF16(dst);
+ } else {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (dst << shift) | (upper >> (16-shift));
+ SetSZPF16(dst);
+ }
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_SHLD_MEM);
+ }
+}
+
+static void I386OP(shld16_cl)(i386_state *cpustate) // Opcode 0x0f a5
+{
+ /* TODO: Correct flags */
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = REG8(CL);
+ if( shift > 31 || shift == 0 ) {
+
+ } else if( shift > 15 ) {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (upper << (shift-16)) | (upper >> (32-shift));
+ SetSZPF16(dst);
+ } else {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (dst << shift) | (upper >> (16-shift));
+ SetSZPF16(dst);
+ }
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_SHLD_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = REG8(CL);
+ if( shift > 31 || shift == 0 ) {
+
+ } else if( shift > 15 ) {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (upper << (shift-16)) | (upper >> (32-shift));
+ SetSZPF16(dst);
+ } else {
+ cpustate->CF = (dst & (1 << (16-shift))) ? 1 : 0;
+ dst = (dst << shift) | (upper >> (16-shift));
+ SetSZPF16(dst);
+ }
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_SHLD_MEM);
+ }
+}
+
+static void I386OP(shrd16_i8)(i386_state *cpustate) // Opcode 0x0f ac
+{
+ /* TODO: Correct flags */
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = FETCH(cpustate);
+ if( shift > 15 || shift == 0) {
+
+ } else {
+ cpustate->CF = (dst & (1 << (shift-1))) ? 1 : 0;
+ dst = (dst >> shift) | (upper << (16-shift));
+ SetSZPF16(dst);
+ }
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_SHRD_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = FETCH(cpustate);
+ if( shift > 15 || shift == 0) {
+
+ } else {
+ cpustate->CF = (dst & (1 << (shift-1))) ? 1 : 0;
+ dst = (dst >> shift) | (upper << (16-shift));
+ SetSZPF16(dst);
+ }
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_SHRD_MEM);
+ }
+}
+
+static void I386OP(shrd16_cl)(i386_state *cpustate) // Opcode 0x0f ad
+{
+ /* TODO: Correct flags */
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = REG8(CL);
+ if( shift > 15 || shift == 0) {
+
+ } else {
+ cpustate->CF = (dst & (1 << (shift-1))) ? 1 : 0;
+ dst = (dst >> shift) | (upper << (16-shift));
+ SetSZPF16(dst);
+ }
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_SHRD_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 upper = LOAD_REG16(modrm);
+ UINT8 shift = REG8(CL);
+ if( shift > 15 || shift == 0) {
+
+ } else {
+ cpustate->CF = (dst & (1 << (shift-1))) ? 1 : 0;
+ dst = (dst >> shift) | (upper << (16-shift));
+ SetSZPF16(dst);
+ }
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_SHRD_MEM);
+ }
+}
+
+static void I386OP(stosw)(i386_state *cpustate) // Opcode 0xab
+{
+ UINT32 ead;
+ ead = i386_translate(cpustate, ES, cpustate->address_size ? REG32(EDI) : REG16(DI) );
+ WRITE16(cpustate,ead, REG16(AX));
+ BUMP_DI(cpustate,2);
+ CYCLES(cpustate,CYCLES_STOS);
+}
+
+static void I386OP(sub_rm16_r16)(i386_state *cpustate) // Opcode 0x29
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = SUB16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = SUB16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(sub_r16_rm16)(i386_state *cpustate) // Opcode 0x2b
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ dst = SUB16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ dst = SUB16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(sub_ax_i16)(i386_state *cpustate) // Opcode 0x2d
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ dst = SUB16(cpustate,dst, src);
+ REG16(AX) = dst;
+ CYCLES(cpustate,CYCLES_ALU_IMM_ACC);
+}
+
+static void I386OP(test_ax_i16)(i386_state *cpustate) // Opcode 0xa9
+{
+ UINT16 src = FETCH16(cpustate);
+ UINT16 dst = REG16(AX);
+ dst = src & dst;
+ SetSZPF16(dst);
+ cpustate->CF = 0;
+ cpustate->OF = 0;
+ CYCLES(cpustate,CYCLES_TEST_IMM_ACC);
+}
+
+static void I386OP(test_rm16_r16)(i386_state *cpustate) // Opcode 0x85
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = src & dst;
+ SetSZPF16(dst);
+ cpustate->CF = 0;
+ cpustate->OF = 0;
+ CYCLES(cpustate,CYCLES_TEST_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = src & dst;
+ SetSZPF16(dst);
+ cpustate->CF = 0;
+ cpustate->OF = 0;
+ CYCLES(cpustate,CYCLES_TEST_REG_MEM);
+ }
+}
+
+static void I386OP(xchg_ax_cx)(i386_state *cpustate) // Opcode 0x91
+{
+ UINT16 temp;
+ temp = REG16(AX);
+ REG16(AX) = REG16(CX);
+ REG16(CX) = temp;
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+}
+
+static void I386OP(xchg_ax_dx)(i386_state *cpustate) // Opcode 0x92
+{
+ UINT16 temp;
+ temp = REG16(AX);
+ REG16(AX) = REG16(DX);
+ REG16(DX) = temp;
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+}
+
+static void I386OP(xchg_ax_bx)(i386_state *cpustate) // Opcode 0x93
+{
+ UINT16 temp;
+ temp = REG16(AX);
+ REG16(AX) = REG16(BX);
+ REG16(BX) = temp;
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+}
+
+static void I386OP(xchg_ax_sp)(i386_state *cpustate) // Opcode 0x94
+{
+ UINT16 temp;
+ temp = REG16(AX);
+ REG16(AX) = REG16(SP);
+ REG16(SP) = temp;
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+}
+
+static void I386OP(xchg_ax_bp)(i386_state *cpustate) // Opcode 0x95
+{
+ UINT16 temp;
+ temp = REG16(AX);
+ REG16(AX) = REG16(BP);
+ REG16(BP) = temp;
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+}
+
+static void I386OP(xchg_ax_si)(i386_state *cpustate) // Opcode 0x96
+{
+ UINT16 temp;
+ temp = REG16(AX);
+ REG16(AX) = REG16(SI);
+ REG16(SI) = temp;
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+}
+
+static void I386OP(xchg_ax_di)(i386_state *cpustate) // Opcode 0x97
+{
+ UINT16 temp;
+ temp = REG16(AX);
+ REG16(AX) = REG16(DI);
+ REG16(DI) = temp;
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+}
+
+static void I386OP(xchg_r16_rm16)(i386_state *cpustate) // Opcode 0x87
+{
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ UINT16 src = LOAD_RM16(modrm);
+ UINT16 dst = LOAD_REG16(modrm);
+ STORE_REG16(modrm, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_XCHG_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 src = READ16(cpustate,ea);
+ UINT16 dst = LOAD_REG16(modrm);
+ STORE_REG16(modrm, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_XCHG_REG_MEM);
+ }
+}
+
+static void I386OP(xor_rm16_r16)(i386_state *cpustate) // Opcode 0x31
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_REG16(modrm);
+ dst = LOAD_RM16(modrm);
+ dst = XOR16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = LOAD_REG16(modrm);
+ dst = READ16(cpustate,ea);
+ dst = XOR16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+}
+
+static void I386OP(xor_r16_rm16)(i386_state *cpustate) // Opcode 0x33
+{
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ dst = LOAD_REG16(modrm);
+ dst = XOR16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ dst = LOAD_REG16(modrm);
+ dst = XOR16(cpustate,dst, src);
+ STORE_REG16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_MEM_REG);
+ }
+}
+
+static void I386OP(xor_ax_i16)(i386_state *cpustate) // Opcode 0x35
+{
+ UINT16 src, dst;
+ src = FETCH16(cpustate);
+ dst = REG16(AX);
+ dst = XOR16(cpustate,dst, src);
+ REG16(AX) = dst;
+ CYCLES(cpustate,CYCLES_ALU_IMM_ACC);
+}
+
+
+
+static void I386OP(group81_16)(i386_state *cpustate) // Opcode 0x81
+{
+ UINT32 ea;
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: // ADD Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ dst = ADD16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ dst = ADD16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 1: // OR Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ dst = OR16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ dst = OR16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 2: // ADC Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 3: // SBB Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 4: // AND Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ dst = AND16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ dst = AND16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 5: // SUB Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ dst = SUB16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ dst = SUB16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 6: // XOR Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ dst = XOR16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ dst = XOR16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 7: // CMP Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = FETCH16(cpustate);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = FETCH16(cpustate);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_REG_MEM);
+ }
+ break;
+ }
+}
+
+static void I386OP(group83_16)(i386_state *cpustate) // Opcode 0x83
+{
+ UINT32 ea;
+ UINT16 src, dst;
+ UINT8 modrm = FETCH(cpustate);
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: // ADD Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = ADD16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = ADD16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 1: // OR Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = OR16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = OR16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 2: // ADC Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = ADC16(cpustate, dst, src, cpustate->CF);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 3: // SBB Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = ((UINT16)(INT16)(INT8)FETCH(cpustate));
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = ((UINT16)(INT16)(INT8)FETCH(cpustate));
+ dst = SBB16(cpustate, dst, src, cpustate->CF);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 4: // AND Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = AND16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = AND16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 5: // SUB Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = SUB16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = SUB16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 6: // XOR Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = XOR16(cpustate,dst, src);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ dst = XOR16(cpustate,dst, src);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_ALU_REG_MEM);
+ }
+ break;
+ case 7: // CMP Rm16, i16
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_REG_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ src = (UINT16)(INT16)(INT8)FETCH(cpustate);
+ SUB16(cpustate,dst, src);
+ CYCLES(cpustate,CYCLES_CMP_REG_MEM);
+ }
+ break;
+ }
+}
+
+static void I386OP(groupC1_16)(i386_state *cpustate) // Opcode 0xc1
+{
+ UINT16 dst;
+ UINT8 modrm = FETCH(cpustate);
+ UINT8 shift;
+
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ shift = FETCH(cpustate) & 0x1f;
+ dst = i386_shift_rotate16(cpustate, modrm, dst, shift);
+ STORE_RM16(modrm, dst);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ shift = FETCH(cpustate) & 0x1f;
+ dst = i386_shift_rotate16(cpustate, modrm, dst, shift);
+ WRITE16(cpustate,ea, dst);
+ }
+}
+
+static void I386OP(groupD1_16)(i386_state *cpustate) // Opcode 0xd1
+{
+ UINT16 dst;
+ UINT8 modrm = FETCH(cpustate);
+
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ dst = i386_shift_rotate16(cpustate, modrm, dst, 1);
+ STORE_RM16(modrm, dst);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ dst = i386_shift_rotate16(cpustate, modrm, dst, 1);
+ WRITE16(cpustate,ea, dst);
+ }
+}
+
+static void I386OP(groupD3_16)(i386_state *cpustate) // Opcode 0xd3
+{
+ UINT16 dst;
+ UINT8 modrm = FETCH(cpustate);
+
+ if( modrm >= 0xc0 ) {
+ dst = LOAD_RM16(modrm);
+ dst = i386_shift_rotate16(cpustate, modrm, dst, REG8(CL));
+ STORE_RM16(modrm, dst);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ dst = READ16(cpustate,ea);
+ dst = i386_shift_rotate16(cpustate, modrm, dst, REG8(CL));
+ WRITE16(cpustate,ea, dst);
+ }
+}
+
+static void I386OP(groupF7_16)(i386_state *cpustate) // Opcode 0xf7
+{
+ UINT8 modrm = FETCH(cpustate);
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* TEST Rm16, i16 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT16 src = FETCH16(cpustate);
+ dst &= src;
+ cpustate->CF = cpustate->OF = cpustate->AF = 0;
+ SetSZPF16(dst);
+ CYCLES(cpustate,CYCLES_TEST_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT16 src = FETCH16(cpustate);
+ dst &= src;
+ cpustate->CF = cpustate->OF = cpustate->AF = 0;
+ SetSZPF16(dst);
+ CYCLES(cpustate,CYCLES_TEST_IMM_MEM);
+ }
+ break;
+ case 2: /* NOT Rm16 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ dst = ~dst;
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_NOT_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ dst = ~dst;
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_NOT_MEM);
+ }
+ break;
+ case 3: /* NEG Rm16 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ dst = SUB16(cpustate, 0, dst );
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_NEG_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ dst = SUB16(cpustate, 0, dst );
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_NEG_MEM);
+ }
+ break;
+ case 4: /* MUL AX, Rm16 */
+ {
+ UINT32 result;
+ UINT16 src, dst;
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_MUL16_ACC_REG); /* TODO: Correct multiply timing */
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_MUL16_ACC_MEM); /* TODO: Correct multiply timing */
+ }
+
+ dst = REG16(AX);
+ result = (UINT32)src * (UINT32)dst;
+ REG16(DX) = (UINT16)(result >> 16);
+ REG16(AX) = (UINT16)result;
+
+ cpustate->CF = cpustate->OF = (REG16(DX) != 0);
+ }
+ break;
+ case 5: /* IMUL AX, Rm16 */
+ {
+ INT32 result;
+ INT32 src, dst;
+ if( modrm >= 0xc0 ) {
+ src = (INT32)(INT16)LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_IMUL16_ACC_REG); /* TODO: Correct multiply timing */
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = (INT32)(INT16)READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_IMUL16_ACC_MEM); /* TODO: Correct multiply timing */
+ }
+
+ dst = (INT32)(INT16)REG16(AX);
+ result = src * dst;
+
+ REG16(DX) = (UINT16)(result >> 16);
+ REG16(AX) = (UINT16)result;
+
+ cpustate->CF = cpustate->OF = !(result == (INT32)(INT16)result);
+ }
+ break;
+ case 6: /* DIV AX, Rm16 */
+ {
+ UINT32 quotient, remainder, result;
+ UINT16 src;
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_DIV16_ACC_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_DIV16_ACC_MEM);
+ }
+
+ quotient = ((UINT32)(REG16(DX)) << 16) | (UINT32)(REG16(AX));
+ if( src ) {
+ remainder = quotient % (UINT32)src;
+ result = quotient / (UINT32)src;
+ if( result > 0xffff ) {
+ /* TODO: Divide error */
+ } else {
+ REG16(DX) = (UINT16)remainder;
+ REG16(AX) = (UINT16)result;
+
+ // this flag is actually undefined, enable on non-cyrix
+ if (cpustate->cpuid_id0 != 0x69727943)
+ cpustate->CF = 1;
+ }
+ } else {
+ /* TODO: Divide by zero */
+ }
+ }
+ break;
+ case 7: /* IDIV AX, Rm16 */
+ {
+ INT32 quotient, remainder, result;
+ UINT16 src;
+ if( modrm >= 0xc0 ) {
+ src = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_IDIV16_ACC_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ src = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_IDIV16_ACC_MEM);
+ }
+
+ quotient = (((INT32)REG16(DX)) << 16) | ((UINT32)REG16(AX));
+ if( src ) {
+ remainder = quotient % (INT32)(INT16)src;
+ result = quotient / (INT32)(INT16)src;
+ if( result > 0xffff ) {
+ /* TODO: Divide error */
+ } else {
+ REG16(DX) = (UINT16)remainder;
+ REG16(AX) = (UINT16)result;
+
+ // this flag is actually undefined, enable on non-cyrix
+ if (cpustate->cpuid_id0 != 0x69727943)
+ cpustate->CF = 1;
+ }
+ } else {
+ /* TODO: Divide by zero */
+ }
+ }
+ break;
+ }
+}
+
+static void I386OP(groupFF_16)(i386_state *cpustate) // Opcode 0xff
+{
+ UINT8 modrm = FETCH(cpustate);
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* INC Rm16 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ dst = INC16(cpustate,dst);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_INC_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ dst = INC16(cpustate,dst);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_INC_MEM);
+ }
+ break;
+ case 1: /* DEC Rm16 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ dst = DEC16(cpustate,dst);
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_DEC_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ dst = DEC16(cpustate,dst);
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_DEC_MEM);
+ }
+ break;
+ case 2: /* CALL Rm16 */
+ {
+ UINT16 address;
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_CALL_REG); /* TODO: Timing = 7 + m */
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ address = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_CALL_MEM); /* TODO: Timing = 10 + m */
+ }
+ PUSH16(cpustate, cpustate->eip );
+ cpustate->eip = address;
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ break;
+ case 3: /* CALL FAR Rm16 */
+ {
+ UINT16 address, selector;
+ if( modrm >= 0xc0 )
+ {
+ fatalerror("i386: groupFF_16 /%d NYI", (modrm >> 3) & 0x7);
+ }
+ else
+ {
+ UINT32 ea = GetEA(cpustate,modrm);
+ address = READ16(cpustate,ea + 0);
+ selector = READ16(cpustate,ea + 2);
+ CYCLES(cpustate,CYCLES_CALL_MEM_INTERSEG); /* TODO: Timing = 10 + m */
+
+ if(PROTECTED_MODE && !V8086_MODE)
+ {
+ i386_protected_mode_call(cpustate,selector,address,1,0);
+ }
+ else
+ {
+ PUSH16(cpustate, cpustate->sreg[CS].selector );
+ PUSH16(cpustate, cpustate->eip );
+ cpustate->sreg[CS].selector = selector;
+ cpustate->performed_intersegment_jump = 1;
+ i386_load_segment_descriptor(cpustate, CS );
+ cpustate->eip = address;
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ }
+ }
+ break;
+ case 4: /* JMP Rm16 */
+ {
+ UINT16 address;
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_JMP_REG); /* TODO: Timing = 7 + m */
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ address = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_JMP_MEM); /* TODO: Timing = 10 + m */
+ }
+ cpustate->eip = address;
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ break;
+ case 5: /* JMP FAR Rm16 */
+ {
+ UINT16 address, selector;
+
+ if( modrm >= 0xc0 )
+ {
+ fatalerror("i386: groupFF_16 /%d NYI", (modrm >> 3) & 0x7);
+ }
+ else
+ {
+ UINT32 ea = GetEA(cpustate,modrm);
+ address = READ16(cpustate,ea + 0);
+ selector = READ16(cpustate,ea + 2);
+ CYCLES(cpustate,CYCLES_JMP_MEM_INTERSEG); /* TODO: Timing = 10 + m */
+ if(PROTECTED_MODE && !V8086_MODE)
+ {
+ i386_protected_mode_jump(cpustate,selector,address,1,0);
+ }
+ else
+ {
+ cpustate->sreg[CS].selector = selector;
+ cpustate->performed_intersegment_jump = 1;
+ i386_load_segment_descriptor(cpustate, CS );
+ cpustate->eip = address;
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+ }
+ }
+ break;
+ case 6: /* PUSH Rm16 */
+ {
+ UINT16 value;
+ if( modrm >= 0xc0 ) {
+ value = LOAD_RM16(modrm);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ value = READ16(cpustate,ea);
+ }
+ PUSH16(cpustate,value);
+ CYCLES(cpustate,CYCLES_PUSH_RM);
+ }
+ break;
+ case 7:
+ I386OP(invalid)(cpustate);
+ break;
+ default:
+ fatalerror("i386: groupFF_16 /%d unimplemented", (modrm >> 3) & 0x7);
+ break;
+ }
+}
+
+static void I386OP(group0F00_16)(i386_state *cpustate) // Opcode 0x0f 00
+{
+ UINT32 address, ea;
+ UINT8 modrm = FETCH(cpustate);
+ I386_SREG seg;
+ UINT8 result;
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* SLDT */
+ if ( PROTECTED_MODE && !V8086_MODE )
+ {
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ STORE_RM16(address, cpustate->ldtr.segment);
+ CYCLES(cpustate,CYCLES_SLDT_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ WRITE16(cpustate, ea, cpustate->ldtr.segment);
+ CYCLES(cpustate,CYCLES_SLDT_MEM);
+ }
+ }
+ else
+ {
+ i386_trap(cpustate,6, 0, 0);
+ }
+ break;
+ case 1: /* STR */
+ if ( PROTECTED_MODE && !V8086_MODE )
+ {
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ STORE_RM16(address, cpustate->task.segment);
+ CYCLES(cpustate,CYCLES_STR_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ WRITE16(cpustate, ea, cpustate->task.segment);
+ CYCLES(cpustate,CYCLES_STR_MEM);
+ }
+ }
+ else
+ {
+ i386_trap(cpustate,6, 0, 0);
+ }
+ break;
+ case 2: /* LLDT */
+ if ( PROTECTED_MODE && !V8086_MODE )
+ {
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ cpustate->ldtr.segment = address;
+ CYCLES(cpustate,CYCLES_LLDT_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ cpustate->ldtr.segment = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_LLDT_MEM);
+ }
+ memset(&seg, 0, sizeof(seg));
+ seg.selector = cpustate->ldtr.segment;
+ i386_load_protected_mode_segment(cpustate,&seg);
+ cpustate->ldtr.limit = seg.limit;
+ cpustate->ldtr.base = seg.base;
+ cpustate->ldtr.flags = seg.flags;
+ }
+ else
+ {
+ i386_trap(cpustate,6, 0, 0);
+ }
+ break;
+
+ case 3: /* LTR */
+ if ( PROTECTED_MODE && !V8086_MODE )
+ {
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ cpustate->task.segment = address;
+ CYCLES(cpustate,CYCLES_LTR_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ cpustate->task.segment = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_LTR_MEM);
+ }
+ memset(&seg, 0, sizeof(seg));
+ seg.selector = cpustate->task.segment;
+ i386_load_protected_mode_segment(cpustate,&seg);
+ cpustate->task.limit = seg.limit;
+ cpustate->task.base = seg.base;
+ cpustate->task.flags = seg.flags;
+ }
+ else
+ {
+ i386_trap(cpustate,6, 0, 0);
+ }
+ break;
+
+ case 4: /* VERR */
+ if ( PROTECTED_MODE && !V8086_MODE )
+ {
+ result = 1;
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_VERR_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ address = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_VERR_MEM);
+ }
+ memset(&seg, 0, sizeof(seg));
+ seg.selector = address;
+ i386_load_protected_mode_segment(cpustate,&seg);
+ // check if the segment is within the bounds of the GDT or LDT
+ if(seg.selector & 0x04)
+ { // LDT
+ if((seg.selector & 0xf8) > cpustate->ldtr.limit)
+ {
+ result = 0;
+ }
+ }
+ else
+ { // GDT
+ if((seg.selector & 0xf8) > cpustate->gdtr.limit)
+ {
+ result = 0;
+ }
+ }
+ // check if the segment is a code or data segment (not a special segment type, like a TSS, gate, LDT...)
+ if(!(seg.flags & 0x10))
+ result = 0;
+ // check that the segment is readable
+ if(seg.flags & 0x10) // is code or data segment
+ {
+ if(seg.flags & 0x08) // is code segment, so check if it's readable
+ {
+ if(!(seg.flags & 0x02))
+ {
+ result = 0;
+ }
+ else
+ { // check if conforming, these are always readable, regardless of privilege
+ if(!(seg.flags & 0x04))
+ {
+ // if not conforming, then we must check privilege levels (TODO: current privilege level check)
+ if(((seg.flags >> 5) & 0x03) < (address & 0x03))
+ result = 0;
+ }
+ }
+ }
+ }
+ // check that the descriptor privilege is greater or equal to the selector's privilege level and the current privilege (TODO)
+ SetZF(result);
+ }
+ else
+ {
+ i386_trap(cpustate,6, 0, 0);
+ logerror("i386: VERR: Exception - Running in real mode or virtual 8086 mode.\n");
+ }
+ break;
+
+ case 5: /* VERW */
+ if ( PROTECTED_MODE && !V8086_MODE )
+ {
+ result = 1;
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_VERW_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ address = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_VERW_MEM);
+ }
+ memset(&seg, 0, sizeof(seg));
+ seg.selector = address;
+ i386_load_protected_mode_segment(cpustate,&seg);
+ // check if the segment is within the bounds of the GDT or LDT
+ if(seg.selector & 0x04)
+ { // LDT
+ if((seg.selector & 0xf8) > cpustate->ldtr.limit)
+ {
+ result = 0;
+ }
+ }
+ else
+ { // GDT
+ if((seg.selector & 0xf8) > cpustate->gdtr.limit)
+ {
+ result = 0;
+ }
+ }
+ // check if the segment is a code or data segment (not a special segment type, like a TSS, gate, LDT...)
+ if(!(seg.flags & 0x10))
+ result = 0;
+ // check that the segment is writable
+ if(seg.flags & 0x10) // is code or data segment
+ {
+ if(seg.flags & 0x08) // is code segment (and thus, not writable)
+ {
+ result = 0;
+ }
+ else
+ { // is data segment
+ if(!(seg.flags & 0x02))
+ result = 0;
+ }
+ }
+ // check that the descriptor privilege is greater or equal to the selector's privilege level and the current privilege (TODO)
+ if(((seg.flags >> 5) & 0x03) < (address & 0x03))
+ result = 0;
+ SetZF(result);
+ }
+ else
+ {
+ i386_trap(cpustate,6, 0, 0);
+ logerror("i386: VERW: Exception - Running in real mode or virtual 8086 mode.\n");
+ }
+ break;
+
+ default:
+ fatalerror("i386: group0F00_16 /%d unimplemented", (modrm >> 3) & 0x7);
+ break;
+ }
+}
+
+static void I386OP(group0F01_16)(i386_state *cpustate) // Opcode 0x0f 01
+{
+ UINT8 modrm = FETCH(cpustate);
+ UINT16 address;
+ UINT32 ea;
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 0: /* SGDT */
+ {
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ ea = i386_translate(cpustate, CS, address );
+ } else {
+ ea = GetEA(cpustate,modrm);
+ }
+ WRITE16(cpustate,ea, cpustate->gdtr.limit);
+ WRITE32(cpustate,ea + 2, cpustate->gdtr.base & 0xffffff);
+ CYCLES(cpustate,CYCLES_SGDT);
+ break;
+ }
+ case 1: /* SIDT */
+ {
+ if (modrm >= 0xc0)
+ {
+ address = LOAD_RM16(modrm);
+ ea = i386_translate(cpustate, CS, address );
+ }
+ else
+ {
+ ea = GetEA(cpustate,modrm);
+ }
+ WRITE16(cpustate,ea, cpustate->idtr.limit);
+ WRITE32(cpustate,ea + 2, cpustate->idtr.base & 0xffffff);
+ CYCLES(cpustate,CYCLES_SIDT);
+ break;
+ }
+ case 2: /* LGDT */
+ {
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ ea = i386_translate(cpustate, CS, address );
+ } else {
+ ea = GetEA(cpustate,modrm);
+ }
+ cpustate->gdtr.limit = READ16(cpustate,ea);
+ cpustate->gdtr.base = READ32(cpustate,ea + 2) & 0xffffff;
+ CYCLES(cpustate,CYCLES_LGDT);
+ break;
+ }
+ case 3: /* LIDT */
+ {
+ if( modrm >= 0xc0 ) {
+ address = LOAD_RM16(modrm);
+ ea = i386_translate(cpustate, CS, address );
+ } else {
+ ea = GetEA(cpustate,modrm);
+ }
+ cpustate->idtr.limit = READ16(cpustate,ea);
+ cpustate->idtr.base = READ32(cpustate,ea + 2) & 0xffffff;
+ CYCLES(cpustate,CYCLES_LIDT);
+ break;
+ }
+ case 4: /* SMSW */
+ {
+ if( modrm >= 0xc0 ) {
+ STORE_RM16(modrm, cpustate->cr[0]);
+ CYCLES(cpustate,CYCLES_SMSW_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ WRITE16(cpustate,ea, cpustate->cr[0]);
+ CYCLES(cpustate,CYCLES_SMSW_MEM);
+ }
+ break;
+ }
+ case 6: /* LMSW */
+ {
+ // TODO: Check for protection fault
+ UINT16 b;
+ if( modrm >= 0xc0 ) {
+ b = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_LMSW_REG);
+ } else {
+ ea = GetEA(cpustate,modrm);
+ CYCLES(cpustate,CYCLES_LMSW_MEM);
+ b = READ16(cpustate,ea);
+ }
+ if(PROTECTED_MODE)
+ b |= 0x0001; // cannot return to real mode using this instruction.
+ cpustate->cr[0] &= ~0x0000ffff;
+ cpustate->cr[0] |= b & 0x0000ffff;
+ break;
+ }
+ default:
+ fatalerror("i386: unimplemented opcode 0x0f 01 /%d at %08X", (modrm >> 3) & 0x7, cpustate->eip - 2);
+ break;
+ }
+}
+
+static void I386OP(group0FBA_16)(i386_state *cpustate) // Opcode 0x0f ba
+{
+ UINT8 modrm = FETCH(cpustate);
+
+ switch( (modrm >> 3) & 0x7 )
+ {
+ case 4: /* BT Rm16, i8 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+
+ CYCLES(cpustate,CYCLES_BT_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+
+ CYCLES(cpustate,CYCLES_BT_IMM_MEM);
+ }
+ break;
+ case 5: /* BTS Rm16, i8 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst |= (1 << bit);
+
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_BTS_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst |= (1 << bit);
+
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_BTS_IMM_MEM);
+ }
+ break;
+ case 6: /* BTR Rm16, i8 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst &= ~(1 << bit);
+
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_BTR_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst &= ~(1 << bit);
+
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_BTR_IMM_MEM);
+ }
+ break;
+ case 7: /* BTC Rm16, i8 */
+ if( modrm >= 0xc0 ) {
+ UINT16 dst = LOAD_RM16(modrm);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst ^= (1 << bit);
+
+ STORE_RM16(modrm, dst);
+ CYCLES(cpustate,CYCLES_BTC_IMM_REG);
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ UINT16 dst = READ16(cpustate,ea);
+ UINT8 bit = FETCH(cpustate);
+
+ if( dst & (1 << bit) )
+ cpustate->CF = 1;
+ else
+ cpustate->CF = 0;
+ dst ^= (1 << bit);
+
+ WRITE16(cpustate,ea, dst);
+ CYCLES(cpustate,CYCLES_BTC_IMM_MEM);
+ }
+ break;
+ default:
+ fatalerror("i386: group0FBA_16 /%d unknown", (modrm >> 3) & 0x7);
+ break;
+ }
+}
+
+static void I386OP(lar_r16_rm16)(i386_state *cpustate) // Opcode 0x0f 0x02
+{
+ UINT8 modrm = FETCH(cpustate);
+ I386_SREG seg;
+ UINT8 type;
+
+ if(PROTECTED_MODE && !V8086_MODE)
+ {
+ memset(&seg,0,sizeof(seg));
+ if(modrm >= 0xc0)
+ {
+ seg.selector = LOAD_RM16(modrm);
+ CYCLES(cpustate,CYCLES_LAR_REG);
+ }
+ else
+ {
+ UINT32 ea = GetEA(cpustate,modrm);
+ seg.selector = READ16(cpustate,ea);
+ CYCLES(cpustate,CYCLES_LAR_MEM);
+ }
+ if(seg.selector == 0)
+ {
+ SetZF(0); // not a valid segment
+ logerror("i386: LAR: Selector %04x is invalid type.\n",seg.selector);
+ }
+ else
+ {
+ i386_load_protected_mode_segment(cpustate,&seg);
+ if(!(seg.flags & 0x10)) // special segment
+ {
+ // check for invalid segment types
+ type = seg.flags & 0x000f;
+ if(type == 0x00 || type == 0x08 || type == 0x0a || type == 0x0d)
+ {
+ SetZF(0); // invalid segment type
+ }
+ else
+ {
+ // TODO: check current privilege level
+ STORE_REG16(modrm,(seg.flags << 8) & 0xff00);
+ SetZF(1);
+ }
+ }
+ else
+ { // data or code segment (both are valid for LAR)
+ // TODO: check current privilege level
+ STORE_REG16(modrm,(seg.flags << 8) & 0xff00);
+ SetZF(1);
+ }
+ }
+ }
+ else
+ {
+ // illegal opcode
+ i386_trap(cpustate,6,0, 0);
+ logerror("i386: LAR: Exception - running in real mode or virtual 8086 mode.\n");
+ }
+}
+
+static void I386OP(lsl_r16_rm16)(i386_state *cpustate) // Opcode 0x0f 0x03
+{
+ UINT8 modrm = FETCH(cpustate);
+ UINT32 limit;
+ I386_SREG seg;
+
+ if(PROTECTED_MODE)
+ {
+ memset(&seg, 0, sizeof(seg));
+ if(modrm >= 0xc0)
+ {
+ seg.selector = LOAD_RM16(modrm);
+ }
+ else
+ {
+ UINT32 ea = GetEA(cpustate,modrm);
+ seg.selector = READ16(cpustate,ea);
+ }
+ if(seg.selector == 0)
+ {
+ SetZF(0); // not a valid segment
+ }
+ else
+ {
+ // TODO: check segment type
+ i386_load_protected_mode_segment(cpustate,&seg);
+ limit = seg.limit;
+ STORE_REG16(modrm,limit & 0x0000ffff);
+ SetZF(1);
+ }
+ }
+ else
+ i386_trap(cpustate,6, 0, 0);
+}
+
+static void I386OP(bound_r16_m16_m16)(i386_state *cpustate) // Opcode 0x62
+{
+ UINT8 modrm;
+ INT16 val, low, high;
+
+ modrm = FETCH(cpustate);
+
+ if (modrm >= 0xc0)
+ {
+ low = high = LOAD_RM16(modrm);
+ }
+ else
+ {
+ UINT32 ea = GetEA(cpustate,modrm);
+ low = READ16(cpustate,ea + 0);
+ high = READ16(cpustate,ea + 2);
+ }
+ val = LOAD_REG16(modrm);
+
+ if ((val < low) || (val > high))
+ {
+ CYCLES(cpustate,CYCLES_BOUND_OUT_RANGE);
+ i386_trap(cpustate,5, 0, 0);
+ }
+ else
+ {
+ CYCLES(cpustate,CYCLES_BOUND_IN_RANGE);
+ }
+}
+
+static void I386OP(retf16)(i386_state *cpustate) // Opcode 0xcb
+{
+ if(PROTECTED_MODE && !V8086_MODE)
+ {
+ i386_protected_mode_retf(cpustate,0,0);
+ }
+ else
+ {
+ cpustate->eip = POP16(cpustate);
+ cpustate->sreg[CS].selector = POP16(cpustate);
+ i386_load_segment_descriptor(cpustate, CS );
+ CHANGE_PC(cpustate,cpustate->eip);
+ }
+
+ CYCLES(cpustate,CYCLES_RET_INTERSEG);
+}
+
+static void I386OP(retf_i16)(i386_state *cpustate) // Opcode 0xca
+{
+ UINT16 count = FETCH16(cpustate);
+
+ if(PROTECTED_MODE && !V8086_MODE)
+ {
+ i386_protected_mode_retf(cpustate,count,0);
+ }
+ else
+ {
+ cpustate->eip = POP16(cpustate);
+ cpustate->sreg[CS].selector = POP16(cpustate);
+ i386_load_segment_descriptor(cpustate, CS );
+ CHANGE_PC(cpustate,cpustate->eip);
+ REG16(SP) += count;
+ }
+
+ CYCLES(cpustate,CYCLES_RET_IMM_INTERSEG);
+}
+
+static void I386OP(xlat16)(i386_state *cpustate) // Opcode 0xd7
+{
+ UINT32 ea;
+ if( cpustate->segment_prefix ) {
+ ea = i386_translate(cpustate, cpustate->segment_override, REG16(BX) + REG8(AL) );
+ } else {
+ ea = i386_translate(cpustate, DS, REG16(BX) + REG8(AL) );
+ }
+ REG8(AL) = READ8(cpustate,ea);
+ CYCLES(cpustate,CYCLES_XLAT);
+}
+
+static void I386OP(load_far_pointer16)(i386_state *cpustate, int s)
+{
+ UINT8 modrm = FETCH(cpustate);
+
+ if( modrm >= 0xc0 ) {
+ fatalerror("i386: load_far_pointer16 NYI");
+ } else {
+ UINT32 ea = GetEA(cpustate,modrm);
+ STORE_REG16(modrm, READ16(cpustate,ea + 0));
+ cpustate->sreg[s].selector = READ16(cpustate,ea + 2);
+ i386_load_segment_descriptor(cpustate, s );
+ }
+}
+
+static void I386OP(lds16)(i386_state *cpustate) // Opcode 0xc5
+{
+ I386OP(load_far_pointer16)(cpustate, DS);
+ CYCLES(cpustate,CYCLES_LDS);
+}
+
+static void I386OP(lss16)(i386_state *cpustate) // Opcode 0x0f 0xb2
+{
+ I386OP(load_far_pointer16)(cpustate, SS);
+ CYCLES(cpustate,CYCLES_LSS);
+}
+
+static void I386OP(les16)(i386_state *cpustate) // Opcode 0xc4
+{
+ I386OP(load_far_pointer16)(cpustate, ES);
+ CYCLES(cpustate,CYCLES_LES);
+}
+
+static void I386OP(lfs16)(i386_state *cpustate) // Opcode 0x0f 0xb4
+{
+ I386OP(load_far_pointer16)(cpustate, FS);
+ CYCLES(cpustate,CYCLES_LFS);
+}
+
+static void I386OP(lgs16)(i386_state *cpustate) // Opcode 0x0f 0xb5
+{
+ I386OP(load_far_pointer16)(cpustate, GS);
+ CYCLES(cpustate,CYCLES_LGS);
+}
+