diff options
Diffstat (limited to 'src/emu/cpu/i386/i386op16.c')
-rw-r--r-- | src/emu/cpu/i386/i386op16.c | 3156 |
1 files changed, 3156 insertions, 0 deletions
diff --git a/src/emu/cpu/i386/i386op16.c b/src/emu/cpu/i386/i386op16.c new file mode 100644 index 00000000000..7eb7deffa4a --- /dev/null +++ b/src/emu/cpu/i386/i386op16.c @@ -0,0 +1,3156 @@ +static UINT16 I386OP(shift_rotate16)(UINT8 modrm, UINT32 value, UINT8 shift) +{ + UINT16 src = value; + UINT16 dst = value; + + if( shift == 0 ) { + CYCLES_RM(modrm, 3, 7); + } else if( shift == 1 ) { + + switch( (modrm >> 3) & 0x7 ) + { + case 0: /* ROL rm16, 1 */ + I.CF = (src & 0x8000) ? 1 : 0; + dst = (src << 1) + I.CF; + I.OF = ((src ^ dst) & 0x8000) ? 1 : 0; + CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM); + break; + case 1: /* ROR rm16, 1 */ + I.CF = (src & 0x1) ? 1 : 0; + dst = (I.CF << 15) | (src >> 1); + I.OF = ((src ^ dst) & 0x8000) ? 1 : 0; + CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM); + break; + case 2: /* RCL rm16, 1 */ + dst = (src << 1) + I.CF; + I.CF = (src & 0x8000) ? 1 : 0; + I.OF = ((src ^ dst) & 0x8000) ? 1 : 0; + CYCLES_RM(modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM); + break; + case 3: /* RCR rm16, 1 */ + dst = (I.CF << 15) | (src >> 1); + I.CF = src & 0x1; + I.OF = ((src ^ dst) & 0x8000) ? 1 : 0; + CYCLES_RM(modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM); + break; + case 4: /* SHL/SAL rm16, 1 */ + case 6: + dst = src << 1; + I.CF = (src & 0x8000) ? 1 : 0; + I.OF = (((I.CF << 15) ^ dst) & 0x8000) ? 1 : 0; + SetSZPF16(dst); + CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM); + break; + case 5: /* SHR rm16, 1 */ + dst = src >> 1; + I.CF = src & 0x1; + I.OF = (dst & 0x8000) ? 1 : 0; + SetSZPF16(dst); + CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM); + break; + case 7: /* SAR rm16, 1 */ + dst = (INT16)(src) >> 1; + I.CF = src & 0x1; + I.OF = 0; + SetSZPF16(dst); + CYCLES_RM(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)); + I.CF = (src >> (16-shift)) & 0x1; + CYCLES_RM(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)); + I.CF = (src >> (shift-1)) & 0x1; + CYCLES_RM(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)) | + (I.CF << (shift-1)); + I.CF = (src >> (16-shift)) & 0x1; + CYCLES_RM(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)) | + (I.CF << (16-shift)); + I.CF = (src >> (shift-1)) & 0x1; + CYCLES_RM(modrm, CYCLES_ROTATE_CARRY_REG, CYCLES_ROTATE_CARRY_MEM); + break; + case 4: /* SHL/SAL rm16, i8 */ + case 6: + dst = src << shift; + I.CF = (src & (1 << (16-shift))) ? 1 : 0; + SetSZPF16(dst); + CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM); + break; + case 5: /* SHR rm16, i8 */ + dst = src >> shift; + I.CF = (src & (1 << (shift-1))) ? 1 : 0; + SetSZPF16(dst); + CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM); + break; + case 7: /* SAR rm16, i8 */ + dst = (INT16)src >> shift; + I.CF = (src & (1 << (shift-1))) ? 1 : 0; + SetSZPF16(dst); + CYCLES_RM(modrm, CYCLES_ROTATE_REG, CYCLES_ROTATE_MEM); + break; + } + + } + return dst; +} + + + +static void I386OP(adc_rm16_r16)(void) // Opcode 0x11 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } +} + +static void I386OP(adc_r16_rm16)(void) // Opcode 0x13 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + dst = LOAD_REG16(modrm); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + dst = LOAD_REG16(modrm); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_MEM_REG); + } +} + +static void I386OP(adc_ax_i16)(void) // Opcode 0x15 +{ + UINT16 src, dst; + src = FETCH16(); + dst = REG16(AX); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + REG16(AX) = dst; + CYCLES(CYCLES_ALU_IMM_ACC); +} + +static void I386OP(add_rm16_r16)(void) // Opcode 0x01 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + dst = ADD16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + dst = ADD16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } +} + +static void I386OP(add_r16_rm16)(void) // Opcode 0x03 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + dst = LOAD_REG16(modrm); + dst = ADD16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + dst = LOAD_REG16(modrm); + dst = ADD16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_MEM_REG); + } +} + +static void I386OP(add_ax_i16)(void) // Opcode 0x05 +{ + UINT16 src, dst; + src = FETCH16(); + dst = REG16(AX); + dst = ADD16(dst, src); + REG16(AX) = dst; + CYCLES(CYCLES_ALU_IMM_ACC); +} + +static void I386OP(and_rm16_r16)(void) // Opcode 0x21 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + dst = AND16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + dst = AND16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } +} + +static void I386OP(and_r16_rm16)(void) // Opcode 0x23 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + dst = LOAD_REG16(modrm); + dst = AND16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + dst = LOAD_REG16(modrm); + dst = AND16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_MEM_REG); + } +} + +static void I386OP(and_ax_i16)(void) // Opcode 0x25 +{ + UINT16 src, dst; + src = FETCH16(); + dst = REG16(AX); + dst = AND16(dst, src); + REG16(AX) = dst; + CYCLES(CYCLES_ALU_IMM_ACC); +} + +static void I386OP(bsf_r16_rm16)(void) // Opcode 0x0f bc +{ + UINT16 src, dst, temp; + UINT8 modrm = FETCH(); + + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + } + + dst = 0; + + if( src == 0 ) { + I.ZF = 1; + } else { + I.ZF = 0; + temp = 0; + while( (src & (1 << temp)) == 0 ) { + temp++; + dst = temp; + CYCLES(CYCLES_BSF); + } + } + CYCLES(CYCLES_BSF_BASE); + STORE_REG16(modrm, dst); +} + +static void I386OP(bsr_r16_rm16)(void) // Opcode 0x0f bd +{ + UINT16 src, dst, temp; + UINT8 modrm = FETCH(); + + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + } + + dst = 0; + + if( src == 0 ) { + I.ZF = 1; + } else { + I.ZF = 0; + temp = 15; + while( (src & (1 << temp)) == 0 ) { + temp--; + dst = temp; + CYCLES(CYCLES_BSR); + } + } + CYCLES(CYCLES_BSR_BASE); + STORE_REG16(modrm, dst); +} + + +static void I386OP(bt_rm16_r16)(void) // Opcode 0x0f a3 +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + + CYCLES(CYCLES_BT_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + + CYCLES(CYCLES_BT_REG_MEM); + } +} + +static void I386OP(btc_rm16_r16)(void) // Opcode 0x0f bb +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst ^= (1 << bit); + + STORE_RM16(modrm, dst); + CYCLES(CYCLES_BTC_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst ^= (1 << bit); + + WRITE16(ea, dst); + CYCLES(CYCLES_BTC_REG_MEM); + } +} + +static void I386OP(btr_rm16_r16)(void) // Opcode 0x0f b3 +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst &= ~(1 << bit); + + STORE_RM16(modrm, dst); + CYCLES(CYCLES_BTR_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst &= ~(1 << bit); + + WRITE16(ea, dst); + CYCLES(CYCLES_BTR_REG_MEM); + } +} + +static void I386OP(bts_rm16_r16)(void) // Opcode 0x0f ab +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst |= (1 << bit); + + STORE_RM16(modrm, dst); + CYCLES(CYCLES_BTS_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 bit = LOAD_REG16(modrm); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst |= (1 << bit); + + WRITE16(ea, dst); + CYCLES(CYCLES_BTS_REG_MEM); + } +} + +static void I386OP(call_abs16)(void) // Opcode 0x9a +{ + UINT16 offset = FETCH16(); + UINT16 ptr = FETCH16(); + + if( PROTECTED_MODE ) { + /* TODO */ + fatalerror("i386: call_abs16 in protected mode unimplemented"); + } else { + if (I.sreg[CS].d) + { + PUSH32( I.sreg[CS].selector ); + PUSH32( I.eip ); + } + else + { + PUSH16( I.sreg[CS].selector ); + PUSH16( I.eip ); + } + I.sreg[CS].selector = ptr; + I.eip = offset; + i386_load_segment_descriptor(CS); + } + CYCLES(CYCLES_CALL_INTERSEG); /* TODO: Timing = 17 + m */ + CHANGE_PC(I.eip); +} + +static void I386OP(call_rel16)(void) // Opcode 0xe8 +{ + INT16 disp = FETCH16(); + + PUSH16( I.eip ); + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_CALL); /* TODO: Timing = 7 + m */ +} + +static void I386OP(cbw)(void) // Opcode 0x98 +{ + REG16(AX) = (INT16)((INT8)REG8(AL)); + CYCLES(CYCLES_CBW); +} + +static void I386OP(cmp_rm16_r16)(void) // Opcode 0x39 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + SUB16(dst, src); + CYCLES(CYCLES_CMP_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + SUB16(dst, src); + CYCLES(CYCLES_CMP_REG_MEM); + } +} + +static void I386OP(cmp_r16_rm16)(void) // Opcode 0x3b +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + dst = LOAD_REG16(modrm); + SUB16(dst, src); + CYCLES(CYCLES_CMP_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + dst = LOAD_REG16(modrm); + SUB16(dst, src); + CYCLES(CYCLES_CMP_MEM_REG); + } +} + +static void I386OP(cmp_ax_i16)(void) // Opcode 0x3d +{ + UINT16 src, dst; + src = FETCH16(); + dst = REG16(AX); + SUB16(dst, src); + CYCLES(CYCLES_CMP_IMM_ACC); +} + +static void I386OP(cmpsw)(void) // Opcode 0xa7 +{ + UINT32 eas, ead; + UINT16 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 = READ16(eas); + dst = READ16(ead); + SUB16(dst, src); + BUMP_SI(2); + BUMP_DI(2); + CYCLES(CYCLES_CMPS); +} + +static void I386OP(cwd)(void) // Opcode 0x99 +{ + if( REG16(AX) & 0x8000 ) { + REG16(DX) = 0xffff; + } else { + REG16(DX) = 0x0000; + } + CYCLES(CYCLES_CWD); +} + +static void I386OP(dec_ax)(void) // Opcode 0x48 +{ + REG16(AX) = DEC16( REG16(AX) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(dec_cx)(void) // Opcode 0x49 +{ + REG16(CX) = DEC16( REG16(CX) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(dec_dx)(void) // Opcode 0x4a +{ + REG16(DX) = DEC16( REG16(DX) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(dec_bx)(void) // Opcode 0x4b +{ + REG16(BX) = DEC16( REG16(BX) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(dec_sp)(void) // Opcode 0x4c +{ + REG16(SP) = DEC16( REG16(SP) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(dec_bp)(void) // Opcode 0x4d +{ + REG16(BP) = DEC16( REG16(BP) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(dec_si)(void) // Opcode 0x4e +{ + REG16(SI) = DEC16( REG16(SI) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(dec_di)(void) // Opcode 0x4f +{ + REG16(DI) = DEC16( REG16(DI) ); + CYCLES(CYCLES_DEC_REG); +} + +static void I386OP(imul_r16_rm16)(void) // Opcode 0x0f af +{ + UINT8 modrm = FETCH(); + INT32 result; + INT32 src, dst; + if( modrm >= 0xc0 ) { + src = (INT32)(INT16)LOAD_RM16(modrm); + CYCLES(CYCLES_IMUL16_REG_REG); /* TODO: Correct multiply timing */ + } else { + UINT32 ea = GetEA(modrm); + src = (INT32)(INT16)READ16(ea); + CYCLES(CYCLES_IMUL16_REG_MEM); /* TODO: Correct multiply timing */ + } + + dst = (INT32)(INT16)LOAD_REG16(modrm); + result = src * dst; + + STORE_REG16(modrm, (UINT16)result); + + I.CF = I.OF = !(result == (INT32)(INT16)result); +} + +static void I386OP(imul_r16_rm16_i16)(void) // Opcode 0x69 +{ + UINT8 modrm = FETCH(); + INT32 result; + INT32 src, dst; + if( modrm >= 0xc0 ) { + dst = (INT32)(INT16)LOAD_RM16(modrm); + CYCLES(CYCLES_IMUL16_REG_IMM_REG); /* TODO: Correct multiply timing */ + } else { + UINT32 ea = GetEA(modrm); + dst = (INT32)(INT16)READ16(ea); + CYCLES(CYCLES_IMUL16_MEM_IMM_REG); /* TODO: Correct multiply timing */ + } + + src = (INT32)(INT16)FETCH16(); + result = src * dst; + + STORE_REG16(modrm, (UINT16)result); + + I.CF = I.OF = !(result == (INT32)(INT16)result); +} + +static void I386OP(imul_r16_rm16_i8)(void) // Opcode 0x6b +{ + UINT8 modrm = FETCH(); + INT32 result; + INT32 src, dst; + if( modrm >= 0xc0 ) { + dst = (INT32)(INT16)LOAD_RM16(modrm); + CYCLES(CYCLES_IMUL16_REG_IMM_REG); /* TODO: Correct multiply timing */ + } else { + UINT32 ea = GetEA(modrm); + dst = (INT32)(INT16)READ16(ea); + CYCLES(CYCLES_IMUL16_MEM_IMM_REG); /* TODO: Correct multiply timing */ + } + + src = (INT32)(INT8)FETCH(); + result = src * dst; + + STORE_REG16(modrm, (UINT16)result); + + I.CF = I.OF = !(result == (INT32)(INT16)result); +} + +static void I386OP(in_ax_i8)(void) // Opcode 0xe5 +{ + UINT16 port = FETCH(); + UINT16 data = READPORT16(port); + REG16(AX) = data; + CYCLES(CYCLES_IN_VAR); +} + +static void I386OP(in_ax_dx)(void) // Opcode 0xed +{ + UINT16 port = REG16(DX); + UINT16 data = READPORT16(port); + REG16(AX) = data; + CYCLES(CYCLES_IN); +} + +static void I386OP(inc_ax)(void) // Opcode 0x40 +{ + REG16(AX) = INC16( REG16(AX) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(inc_cx)(void) // Opcode 0x41 +{ + REG16(CX) = INC16( REG16(CX) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(inc_dx)(void) // Opcode 0x42 +{ + REG16(DX) = INC16( REG16(DX) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(inc_bx)(void) // Opcode 0x43 +{ + REG16(BX) = INC16( REG16(BX) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(inc_sp)(void) // Opcode 0x44 +{ + REG16(SP) = INC16( REG16(SP) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(inc_bp)(void) // Opcode 0x45 +{ + REG16(BP) = INC16( REG16(BP) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(inc_si)(void) // Opcode 0x46 +{ + REG16(SI) = INC16( REG16(SI) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(inc_di)(void) // Opcode 0x47 +{ + REG16(DI) = INC16( REG16(DI) ); + CYCLES(CYCLES_INC_REG); +} + +static void I386OP(iret16)(void) // Opcode 0xcf +{ + if( PROTECTED_MODE ) { + /* TODO: Virtual 8086-mode */ + /* TODO: Nested task */ + /* TODO: #SS(0) exception */ + /* TODO: All the protection-related stuff... */ + I.eip = POP16(); + I.sreg[CS].selector = POP16(); + set_flags( POP16() ); + i386_load_segment_descriptor(CS); + CHANGE_PC(I.eip); + } else { + /* TODO: #SS(0) exception */ + /* TODO: #GP(0) exception */ + I.eip = POP16(); + I.sreg[CS].selector = POP16(); + set_flags( POP16() ); + i386_load_segment_descriptor(CS); + CHANGE_PC(I.eip); + } + CYCLES(CYCLES_IRET); +} + +static void I386OP(ja_rel16)(void) // Opcode 0x0f 87 +{ + INT16 disp = FETCH16(); + if( I.CF == 0 && I.ZF == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jbe_rel16)(void) // Opcode 0x0f 86 +{ + INT16 disp = FETCH16(); + if( I.CF != 0 || I.ZF != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jc_rel16)(void) // Opcode 0x0f 82 +{ + INT16 disp = FETCH16(); + if( I.CF != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jg_rel16)(void) // Opcode 0x0f 8f +{ + INT16 disp = FETCH16(); + if( I.ZF == 0 && (I.SF == I.OF) ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jge_rel16)(void) // Opcode 0x0f 8d +{ + INT16 disp = FETCH16(); + if( (I.SF == I.OF) ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jl_rel16)(void) // Opcode 0x0f 8c +{ + INT16 disp = FETCH16(); + if( (I.SF != I.OF) ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jle_rel16)(void) // Opcode 0x0f 8e +{ + INT16 disp = FETCH16(); + if( I.ZF != 0 || (I.SF != I.OF) ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jnc_rel16)(void) // Opcode 0x0f 83 +{ + INT16 disp = FETCH16(); + if( I.CF == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jno_rel16)(void) // Opcode 0x0f 81 +{ + INT16 disp = FETCH16(); + if( I.OF == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jnp_rel16)(void) // Opcode 0x0f 8b +{ + INT16 disp = FETCH16(); + if( I.PF == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jns_rel16)(void) // Opcode 0x0f 89 +{ + INT16 disp = FETCH16(); + if( I.SF == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jnz_rel16)(void) // Opcode 0x0f 85 +{ + INT16 disp = FETCH16(); + if( I.ZF == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jo_rel16)(void) // Opcode 0x0f 80 +{ + INT16 disp = FETCH16(); + if( I.OF != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jp_rel16)(void) // Opcode 0x0f 8a +{ + INT16 disp = FETCH16(); + if( I.PF != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(js_rel16)(void) // Opcode 0x0f 88 +{ + INT16 disp = FETCH16(); + if( I.SF != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jz_rel16)(void) // Opcode 0x0f 84 +{ + INT16 disp = FETCH16(); + if( I.ZF != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCC_FULL_DISP); /* TODO: Timing = 7 + m */ + } else { + CYCLES(CYCLES_JCC_FULL_DISP_NOBRANCH); + } +} + +static void I386OP(jcxz16)(void) // Opcode 0xe3 +{ + INT8 disp = FETCH(); + if( REG16(CX) == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JCXZ); /* TODO: Timing = 9 + m */ + } else { + CYCLES(CYCLES_JCXZ_NOBRANCH); + } +} + +static void I386OP(jmp_rel16)(void) // Opcode 0xe9 +{ + INT16 disp = FETCH16(); + + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + CYCLES(CYCLES_JMP); /* TODO: Timing = 7 + m */ +} + +static void I386OP(jmp_abs16)(void) // Opcode 0xea +{ + UINT16 address = FETCH16(); + UINT16 segment = FETCH16(); + + if( PROTECTED_MODE ) { + /* TODO: #GP */ + /* TODO: access rights, etc. */ + I.eip = address; + I.sreg[CS].selector = segment; + I.performed_intersegment_jump = 1; + i386_load_segment_descriptor(CS); + CHANGE_PC(I.eip); + } else { + I.eip = address; + I.sreg[CS].selector = segment; + I.performed_intersegment_jump = 1; + i386_load_segment_descriptor(CS); + CHANGE_PC(I.eip); + } + CYCLES(CYCLES_JMP_INTERSEG); +} + +static void I386OP(lea16)(void) // Opcode 0x8d +{ + UINT8 modrm = FETCH(); + UINT32 ea = GetNonTranslatedEA(modrm); + STORE_REG16(modrm, ea); + CYCLES(CYCLES_LEA); +} + +static void I386OP(leave16)(void) // Opcode 0xc9 +{ + REG16(SP) = REG16(BP); + REG16(BP) = POP16(); + CYCLES(CYCLES_LEAVE); +} + +static void I386OP(lodsw)(void) // Opcode 0xad +{ + 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) ); + } + REG16(AX) = READ16(eas); + BUMP_SI(2); + CYCLES(CYCLES_LODS); +} + +static void I386OP(loop16)(void) // Opcode 0xe2 +{ + INT8 disp = FETCH(); + REG16(CX)--; + if( REG16(CX) != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + } + CYCLES(CYCLES_LOOP); /* TODO: Timing = 11 + m */ +} + +static void I386OP(loopne16)(void) // Opcode 0xe0 +{ + INT8 disp = FETCH(); + REG16(CX)--; + if( REG16(CX) != 0 && I.ZF == 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + } + CYCLES(CYCLES_LOOPNZ); /* TODO: Timing = 11 + m */ +} + +static void I386OP(loopz16)(void) // Opcode 0xe1 +{ + INT8 disp = FETCH(); + REG16(CX)--; + if( REG16(CX) != 0 && I.ZF != 0 ) { + if (I.sreg[CS].d) + { + I.eip += disp; + } + else + { + I.eip = (I.eip + disp) & 0xffff; + } + CHANGE_PC(I.eip); + } + CYCLES(CYCLES_LOOPZ); /* TODO: Timing = 11 + m */ +} + +static void I386OP(mov_rm16_r16)(void) // Opcode 0x89 +{ + UINT16 src; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + STORE_RM16(modrm, src); + CYCLES(CYCLES_MOV_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + WRITE16(ea, src); + CYCLES(CYCLES_MOV_REG_MEM); + } +} + +static void I386OP(mov_r16_rm16)(void) // Opcode 0x8b +{ + UINT16 src; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + STORE_REG16(modrm, src); + CYCLES(CYCLES_MOV_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + STORE_REG16(modrm, src); + CYCLES(CYCLES_MOV_MEM_REG); + } +} + +static void I386OP(mov_rm16_i16)(void) // Opcode 0xc7 +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 value = FETCH16(); + STORE_RM16(modrm, value); + CYCLES(CYCLES_MOV_IMM_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 value = FETCH16(); + WRITE16(ea, value); + CYCLES(CYCLES_MOV_IMM_MEM); + } +} + +static void I386OP(mov_ax_m16)(void) // Opcode 0xa1 +{ + 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 ); + } + REG16(AX) = READ16(ea); + CYCLES(CYCLES_MOV_MEM_ACC); +} + +static void I386OP(mov_m16_ax)(void) // Opcode 0xa3 +{ + 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 ); + } + WRITE16( ea, REG16(AX) ); + CYCLES(CYCLES_MOV_ACC_MEM); +} + +static void I386OP(mov_ax_i16)(void) // Opcode 0xb8 +{ + REG16(AX) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(mov_cx_i16)(void) // Opcode 0xb9 +{ + REG16(CX) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(mov_dx_i16)(void) // Opcode 0xba +{ + REG16(DX) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(mov_bx_i16)(void) // Opcode 0xbb +{ + REG16(BX) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(mov_sp_i16)(void) // Opcode 0xbc +{ + REG16(SP) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(mov_bp_i16)(void) // Opcode 0xbd +{ + REG16(BP) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(mov_si_i16)(void) // Opcode 0xbe +{ + REG16(SI) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(mov_di_i16)(void) // Opcode 0xbf +{ + REG16(DI) = FETCH16(); + CYCLES(CYCLES_MOV_IMM_REG); +} + +static void I386OP(movsw)(void) // Opcode 0xa5 +{ + UINT32 eas, ead; + UINT16 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 = READ16(eas); + WRITE16(ead, v); + BUMP_SI(2); + BUMP_DI(2); + CYCLES(CYCLES_MOVS); +} + +static void I386OP(movsx_r16_rm8)(void) // Opcode 0x0f be +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + INT16 src = (INT8)LOAD_RM8(modrm); + STORE_REG16(modrm, src); + CYCLES(CYCLES_MOVSX_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + INT16 src = (INT8)READ8(ea); + STORE_REG16(modrm, src); + CYCLES(CYCLES_MOVSX_MEM_REG); + } +} + +static void I386OP(movzx_r16_rm8)(void) // Opcode 0x0f b6 +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 src = (UINT8)LOAD_RM8(modrm); + STORE_REG16(modrm, src); + CYCLES(CYCLES_MOVZX_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 src = (UINT8)READ8(ea); + STORE_REG16(modrm, src); + CYCLES(CYCLES_MOVZX_MEM_REG); + } +} + +static void I386OP(or_rm16_r16)(void) // Opcode 0x09 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + dst = OR16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + dst = OR16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } +} + +static void I386OP(or_r16_rm16)(void) // Opcode 0x0b +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + dst = LOAD_REG16(modrm); + dst = OR16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + dst = LOAD_REG16(modrm); + dst = OR16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_MEM_REG); + } +} + +static void I386OP(or_ax_i16)(void) // Opcode 0x0d +{ + UINT16 src, dst; + src = FETCH16(); + dst = REG16(AX); + dst = OR16(dst, src); + REG16(AX) = dst; + CYCLES(CYCLES_ALU_IMM_ACC); +} + +static void I386OP(out_ax_i8)(void) // Opcode 0xe7 +{ + UINT16 port = FETCH(); + UINT16 data = REG16(AX); + WRITEPORT16(port, data); + CYCLES(CYCLES_OUT_VAR); +} + +static void I386OP(out_ax_dx)(void) // Opcode 0xef +{ + UINT16 port = REG16(DX); + UINT16 data = REG16(AX); + WRITEPORT16(port, data); + CYCLES(CYCLES_OUT); +} + +static void I386OP(pop_ax)(void) // Opcode 0x58 +{ + REG16(AX) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_cx)(void) // Opcode 0x59 +{ + REG16(CX) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_dx)(void) // Opcode 0x5a +{ + REG16(DX) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_bx)(void) // Opcode 0x5b +{ + REG16(BX) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_sp)(void) // Opcode 0x5c +{ + REG16(SP) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_bp)(void) // Opcode 0x5d +{ + REG16(BP) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_si)(void) // Opcode 0x5e +{ + REG16(SI) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_di)(void) // Opcode 0x5f +{ + REG16(DI) = POP16(); + CYCLES(CYCLES_POP_REG_SHORT); +} + +static void I386OP(pop_ds16)(void) // Opcode 0x1f +{ + I.sreg[DS].selector = POP16(); + if( PROTECTED_MODE ) { + i386_load_segment_descriptor(DS); + } else { + i386_load_segment_descriptor(DS); + } + CYCLES(CYCLES_POP_SREG); +} + +static void I386OP(pop_es16)(void) // Opcode 0x07 +{ + I.sreg[ES].selector = POP16(); + if( PROTECTED_MODE ) { + i386_load_segment_descriptor(ES); + } else { + i386_load_segment_descriptor(ES); + } + CYCLES(CYCLES_POP_SREG); +} + +static void I386OP(pop_fs16)(void) // Opcode 0x0f a1 +{ + I.sreg[FS].selector = POP16(); + if( PROTECTED_MODE ) { + i386_load_segment_descriptor(FS); + } else { + i386_load_segment_descriptor(FS); + } + CYCLES(CYCLES_POP_SREG); +} + +static void I386OP(pop_gs16)(void) // Opcode 0x0f a9 +{ + I.sreg[GS].selector = POP16(); + if( PROTECTED_MODE ) { + i386_load_segment_descriptor(GS); + } else { + i386_load_segment_descriptor(GS); + } + CYCLES(CYCLES_POP_SREG); +} + +static void I386OP(pop_ss16)(void) // Opcode 0x17 +{ + I.sreg[SS].selector = POP16(); + if( PROTECTED_MODE ) { + i386_load_segment_descriptor(SS); + } else { + i386_load_segment_descriptor(SS); + } + CYCLES(CYCLES_POP_SREG); +} + +static void I386OP(pop_rm16)(void) // Opcode 0x8f +{ + UINT8 modrm = FETCH(); + UINT16 value = POP16(); + + if( modrm >= 0xc0 ) { + STORE_RM16(modrm, value); + } else { + UINT32 ea = GetEA(modrm); + WRITE16(ea, value); + } + CYCLES(CYCLES_POP_RM); +} + +static void I386OP(popa)(void) // Opcode 0x61 +{ + REG16(DI) = POP16(); + REG16(SI) = POP16(); + REG16(BP) = POP16(); + REG16(SP) += 2; + REG16(BX) = POP16(); + REG16(DX) = POP16(); + REG16(CX) = POP16(); + REG16(AX) = POP16(); + CYCLES(CYCLES_POPA); +} + +static void I386OP(popf)(void) // Opcode 0x9d +{ + UINT16 value = POP16(); + set_flags(value); + CYCLES(CYCLES_POPF); +} + +static void I386OP(push_ax)(void) // Opcode 0x50 +{ + PUSH16( REG16(AX) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_cx)(void) // Opcode 0x51 +{ + PUSH16( REG16(CX) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_dx)(void) // Opcode 0x52 +{ + PUSH16( REG16(DX) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_bx)(void) // Opcode 0x53 +{ + PUSH16( REG16(BX) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_sp)(void) // Opcode 0x54 +{ + PUSH16( REG16(SP) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_bp)(void) // Opcode 0x55 +{ + PUSH16( REG16(BP) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_si)(void) // Opcode 0x56 +{ + PUSH16( REG16(SI) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_di)(void) // Opcode 0x57 +{ + PUSH16( REG16(DI) ); + CYCLES(CYCLES_PUSH_REG_SHORT); +} + +static void I386OP(push_cs16)(void) // Opcode 0x0e +{ + PUSH16( I.sreg[CS].selector ); + CYCLES(CYCLES_PUSH_SREG); +} + +static void I386OP(push_ds16)(void) // Opcode 0x1e +{ + PUSH16( I.sreg[DS].selector ); + CYCLES(CYCLES_PUSH_SREG); +} + +static void I386OP(push_es16)(void) // Opcode 0x06 +{ + PUSH16( I.sreg[ES].selector ); + CYCLES(CYCLES_PUSH_SREG); +} + +static void I386OP(push_fs16)(void) // Opcode 0x0f a0 +{ + PUSH16( I.sreg[FS].selector ); + CYCLES(CYCLES_PUSH_SREG); +} + +static void I386OP(push_gs16)(void) // Opcode 0x0f a8 +{ + PUSH16( I.sreg[GS].selector ); + CYCLES(CYCLES_PUSH_SREG); +} + +static void I386OP(push_ss16)(void) // Opcode 0x16 +{ + PUSH16( I.sreg[SS].selector ); + CYCLES(CYCLES_PUSH_SREG); +} + +static void I386OP(push_i16)(void) // Opcode 0x68 +{ + UINT16 value = FETCH16(); + PUSH16(value); + CYCLES(CYCLES_PUSH_IMM); +} + +static void I386OP(pusha)(void) // Opcode 0x60 +{ + UINT16 temp = REG16(SP); + PUSH16( REG16(AX) ); + PUSH16( REG16(CX) ); + PUSH16( REG16(DX) ); + PUSH16( REG16(BX) ); + PUSH16( temp ); + PUSH16( REG16(BP) ); + PUSH16( REG16(SI) ); + PUSH16( REG16(DI) ); + CYCLES(CYCLES_PUSHA); +} + +static void I386OP(pushf)(void) // Opcode 0x9c +{ + PUSH16( get_flags() & 0xffff ); + CYCLES(CYCLES_PUSHF); +} + +static void I386OP(ret_near16_i16)(void) // Opcode 0xc2 +{ + INT16 disp = FETCH16(); + I.eip = POP16(); + REG16(SP) += disp; + CHANGE_PC(I.eip); + CYCLES(CYCLES_RET_IMM); /* TODO: Timing = 10 + m */ +} + +static void I386OP(ret_near16)(void) // Opcode 0xc3 +{ + I.eip = POP16(); + CHANGE_PC(I.eip); + CYCLES(CYCLES_RET); /* TODO: Timing = 10 + m */ +} + +static void I386OP(sbb_rm16_r16)(void) // Opcode 0x19 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm) + I.CF; + dst = LOAD_RM16(modrm); + dst = SUB16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm) + I.CF; + dst = READ16(ea); + dst = SUB16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } +} + +static void I386OP(sbb_r16_rm16)(void) // Opcode 0x1b +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm) + I.CF; + dst = LOAD_REG16(modrm); + dst = SUB16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea) + I.CF; + dst = LOAD_REG16(modrm); + dst = SUB16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_MEM_REG); + } +} + +static void I386OP(sbb_ax_i16)(void) // Opcode 0x1d +{ + UINT16 src, dst; + src = FETCH16() + I.CF; + dst = REG16(AX); + dst = SUB16(dst, src); + REG16(AX) = dst; + CYCLES(CYCLES_ALU_IMM_ACC); +} + +static void I386OP(scasw)(void) // Opcode 0xaf +{ + UINT32 eas; + UINT16 src, dst; + eas = i386_translate( ES, I.address_size ? REG32(EDI) : REG16(DI) ); + src = READ16(eas); + dst = REG16(AX); + SUB16(dst, src); + BUMP_DI(2); + CYCLES(CYCLES_SCAS); +} + +static void I386OP(shld16_i8)(void) // Opcode 0x0f a4 +{ + /* TODO: Correct flags */ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 upper = LOAD_REG16(modrm); + UINT8 shift = FETCH(); + if( shift > 31 || shift == 0 ) { + + } else if( shift > 15 ) { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (upper << (shift-16)) | (upper >> (32-shift)); + SetSZPF16(dst); + } else { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (dst << shift) | (upper >> (16-shift)); + SetSZPF16(dst); + } + STORE_RM16(modrm, dst); + CYCLES(CYCLES_SHLD_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 upper = LOAD_REG16(modrm); + UINT8 shift = FETCH(); + if( shift > 31 || shift == 0 ) { + + } else if( shift > 15 ) { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (upper << (shift-16)) | (upper >> (32-shift)); + SetSZPF16(dst); + } else { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (dst << shift) | (upper >> (16-shift)); + SetSZPF16(dst); + } + WRITE16(ea, dst); + CYCLES(CYCLES_SHLD_MEM); + } +} + +static void I386OP(shld16_cl)(void) // Opcode 0x0f a5 +{ + /* TODO: Correct flags */ + UINT8 modrm = FETCH(); + 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 ) { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (upper << (shift-16)) | (upper >> (32-shift)); + SetSZPF16(dst); + } else { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (dst << shift) | (upper >> (16-shift)); + SetSZPF16(dst); + } + STORE_RM16(modrm, dst); + CYCLES(CYCLES_SHLD_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 upper = LOAD_REG16(modrm); + UINT8 shift = REG8(CL); + if( shift > 31 || shift == 0 ) { + + } else if( shift > 15 ) { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (upper << (shift-16)) | (upper >> (32-shift)); + SetSZPF16(dst); + } else { + I.CF = (dst & (1 << (16-shift))) ? 1 : 0; + dst = (dst << shift) | (upper >> (16-shift)); + SetSZPF16(dst); + } + WRITE16(ea, dst); + CYCLES(CYCLES_SHLD_MEM); + } +} + +static void I386OP(shrd16_i8)(void) // Opcode 0x0f ac +{ + /* TODO: Correct flags */ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 upper = LOAD_REG16(modrm); + UINT8 shift = FETCH(); + if( shift > 15 || shift == 0) { + + } else { + I.CF = (dst & (1 << (shift-1))) ? 1 : 0; + dst = (dst >> shift) | (upper << (16-shift)); + SetSZPF16(dst); + } + STORE_RM16(modrm, dst); + CYCLES(CYCLES_SHRD_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 upper = LOAD_REG16(modrm); + UINT8 shift = FETCH(); + if( shift > 15 || shift == 0) { + + } else { + I.CF = (dst & (1 << (shift-1))) ? 1 : 0; + dst = (dst >> shift) | (upper << (16-shift)); + SetSZPF16(dst); + } + WRITE16(ea, dst); + CYCLES(CYCLES_SHRD_MEM); + } +} + +static void I386OP(shrd16_cl)(void) // Opcode 0x0f ad +{ + /* TODO: Correct flags */ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 upper = LOAD_REG16(modrm); + UINT8 shift = REG8(CL); + if( shift > 15 || shift == 0) { + + } else { + I.CF = (dst & (1 << (shift-1))) ? 1 : 0; + dst = (dst >> shift) | (upper << (16-shift)); + SetSZPF16(dst); + } + STORE_RM16(modrm, dst); + CYCLES(CYCLES_SHRD_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 upper = LOAD_REG16(modrm); + UINT8 shift = REG8(CL); + if( shift > 15 || shift == 0) { + + } else { + I.CF = (dst & (1 << (shift-1))) ? 1 : 0; + dst = (dst >> shift) | (upper << (16-shift)); + SetSZPF16(dst); + } + WRITE16(ea, dst); + CYCLES(CYCLES_SHRD_MEM); + } +} + +static void I386OP(stosw)(void) // Opcode 0xab +{ + UINT32 ead; + ead = i386_translate( ES, I.address_size ? REG32(EDI) : REG16(DI) ); + WRITE16(ead, REG16(AX)); + BUMP_DI(2); + CYCLES(CYCLES_STOS); +} + +static void I386OP(sub_rm16_r16)(void) // Opcode 0x29 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + dst = SUB16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + dst = SUB16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } +} + +static void I386OP(sub_r16_rm16)(void) // Opcode 0x2b +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + dst = LOAD_REG16(modrm); + dst = SUB16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + dst = LOAD_REG16(modrm); + dst = SUB16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_MEM_REG); + } +} + +static void I386OP(sub_ax_i16)(void) // Opcode 0x2d +{ + UINT16 src, dst; + src = FETCH16(); + dst = REG16(AX); + dst = SUB16(dst, src); + REG16(AX) = dst; + CYCLES(CYCLES_ALU_IMM_ACC); +} + +static void I386OP(test_ax_i16)(void) // Opcode 0xa9 +{ + UINT16 src = FETCH16(); + UINT16 dst = REG16(AX); + dst = src & dst; + SetSZPF16(dst); + I.CF = 0; + I.OF = 0; + CYCLES(CYCLES_TEST_IMM_ACC); +} + +static void I386OP(test_rm16_r16)(void) // Opcode 0x85 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + dst = src & dst; + SetSZPF16(dst); + I.CF = 0; + I.OF = 0; + CYCLES(CYCLES_TEST_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + dst = src & dst; + SetSZPF16(dst); + I.CF = 0; + I.OF = 0; + CYCLES(CYCLES_TEST_REG_MEM); + } +} + +static void I386OP(xchg_ax_cx)(void) // Opcode 0x91 +{ + UINT16 temp; + temp = REG16(AX); + REG16(AX) = REG16(CX); + REG16(CX) = temp; + CYCLES(CYCLES_XCHG_REG_REG); +} + +static void I386OP(xchg_ax_dx)(void) // Opcode 0x92 +{ + UINT16 temp; + temp = REG16(AX); + REG16(AX) = REG16(DX); + REG16(DX) = temp; + CYCLES(CYCLES_XCHG_REG_REG); +} + +static void I386OP(xchg_ax_bx)(void) // Opcode 0x93 +{ + UINT16 temp; + temp = REG16(AX); + REG16(AX) = REG16(BX); + REG16(BX) = temp; + CYCLES(CYCLES_XCHG_REG_REG); +} + +static void I386OP(xchg_ax_sp)(void) // Opcode 0x94 +{ + UINT16 temp; + temp = REG16(AX); + REG16(AX) = REG16(SP); + REG16(SP) = temp; + CYCLES(CYCLES_XCHG_REG_REG); +} + +static void I386OP(xchg_ax_bp)(void) // Opcode 0x95 +{ + UINT16 temp; + temp = REG16(AX); + REG16(AX) = REG16(BP); + REG16(BP) = temp; + CYCLES(CYCLES_XCHG_REG_REG); +} + +static void I386OP(xchg_ax_si)(void) // Opcode 0x96 +{ + UINT16 temp; + temp = REG16(AX); + REG16(AX) = REG16(SI); + REG16(SI) = temp; + CYCLES(CYCLES_XCHG_REG_REG); +} + +static void I386OP(xchg_ax_di)(void) // Opcode 0x97 +{ + UINT16 temp; + temp = REG16(AX); + REG16(AX) = REG16(DI); + REG16(DI) = temp; + CYCLES(CYCLES_XCHG_REG_REG); +} + +static void I386OP(xchg_r16_rm16)(void) // Opcode 0x87 +{ + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + UINT16 src = LOAD_RM16(modrm); + UINT16 dst = LOAD_REG16(modrm); + STORE_REG16(modrm, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_XCHG_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 src = READ16(ea); + UINT16 dst = LOAD_REG16(modrm); + STORE_REG16(modrm, src); + WRITE16(ea, dst); + CYCLES(CYCLES_XCHG_REG_MEM); + } +} + +static void I386OP(xor_rm16_r16)(void) // Opcode 0x31 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_REG16(modrm); + dst = LOAD_RM16(modrm); + dst = XOR16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = LOAD_REG16(modrm); + dst = READ16(ea); + dst = XOR16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } +} + +static void I386OP(xor_r16_rm16)(void) // Opcode 0x33 +{ + UINT16 src, dst; + UINT8 modrm = FETCH(); + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + dst = LOAD_REG16(modrm); + dst = XOR16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + dst = LOAD_REG16(modrm); + dst = XOR16(dst, src); + STORE_REG16(modrm, dst); + CYCLES(CYCLES_ALU_MEM_REG); + } +} + +static void I386OP(xor_ax_i16)(void) // Opcode 0x35 +{ + UINT16 src, dst; + src = FETCH16(); + dst = REG16(AX); + dst = XOR16(dst, src); + REG16(AX) = dst; + CYCLES(CYCLES_ALU_IMM_ACC); +} + + + +static void I386OP(group81_16)(void) // Opcode 0x81 +{ + UINT32 ea; + UINT16 src, dst; + UINT8 modrm = FETCH(); + + switch( (modrm >> 3) & 0x7 ) + { + case 0: // ADD Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16(); + dst = ADD16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16(); + dst = ADD16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 1: // OR Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16(); + dst = OR16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16(); + dst = OR16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 2: // ADC Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16(); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16(); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 3: // SBB Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16() + I.CF; + dst = SUB16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16() + I.CF; + dst = SUB16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 4: // AND Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16(); + dst = AND16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16(); + dst = AND16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 5: // SUB Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16(); + dst = SUB16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16(); + dst = SUB16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 6: // XOR Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16(); + dst = XOR16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16(); + dst = XOR16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 7: // CMP Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = FETCH16(); + SUB16(dst, src); + CYCLES(CYCLES_CMP_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = FETCH16(); + SUB16(dst, src); + CYCLES(CYCLES_CMP_REG_MEM); + } + break; + } +} + +static void I386OP(group83_16)(void) // Opcode 0x83 +{ + UINT32 ea; + UINT16 src, dst; + UINT8 modrm = FETCH(); + + switch( (modrm >> 3) & 0x7 ) + { + case 0: // ADD Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = ADD16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = ADD16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 1: // OR Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = OR16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = OR16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 2: // ADC Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = (UINT16)(INT16)(INT8)FETCH(); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = (UINT16)(INT16)(INT8)FETCH(); + src = ADD16(src, I.CF); + dst = ADD16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 3: // SBB Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = ((UINT16)(INT16)(INT8)FETCH()) + I.CF; + dst = SUB16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = ((UINT16)(INT16)(INT8)FETCH()) + I.CF; + dst = SUB16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 4: // AND Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = AND16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = AND16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 5: // SUB Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = SUB16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = SUB16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 6: // XOR Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = XOR16(dst, src); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_ALU_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = (UINT16)(INT16)(INT8)FETCH(); + dst = XOR16(dst, src); + WRITE16(ea, dst); + CYCLES(CYCLES_ALU_REG_MEM); + } + break; + case 7: // CMP Rm16, i16 + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + src = (UINT16)(INT16)(INT8)FETCH(); + SUB16(dst, src); + CYCLES(CYCLES_CMP_REG_REG); + } else { + ea = GetEA(modrm); + dst = READ16(ea); + src = (UINT16)(INT16)(INT8)FETCH(); + SUB16(dst, src); + CYCLES(CYCLES_CMP_REG_MEM); + } + break; + } +} + +static void I386OP(groupC1_16)(void) // Opcode 0xc1 +{ + UINT16 dst; + UINT8 modrm = FETCH(); + UINT8 shift; + + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + shift = FETCH() & 0x1f; + dst = i386_shift_rotate16(modrm, dst, shift); + STORE_RM16(modrm, dst); + } else { + UINT32 ea = GetEA(modrm); + dst = READ16(ea); + shift = FETCH() & 0x1f; + dst = i386_shift_rotate16(modrm, dst, shift); + WRITE16(ea, dst); + } +} + +static void I386OP(groupD1_16)(void) // Opcode 0xd1 +{ + UINT16 dst; + UINT8 modrm = FETCH(); + + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + dst = i386_shift_rotate16(modrm, dst, 1); + STORE_RM16(modrm, dst); + } else { + UINT32 ea = GetEA(modrm); + dst = READ16(ea); + dst = i386_shift_rotate16(modrm, dst, 1); + WRITE16(ea, dst); + } +} + +static void I386OP(groupD3_16)(void) // Opcode 0xd3 +{ + UINT16 dst; + UINT8 modrm = FETCH(); + + if( modrm >= 0xc0 ) { + dst = LOAD_RM16(modrm); + dst = i386_shift_rotate16(modrm, dst, REG8(CL)); + STORE_RM16(modrm, dst); + } else { + UINT32 ea = GetEA(modrm); + dst = READ16(ea); + dst = i386_shift_rotate16(modrm, dst, REG8(CL)); + WRITE16(ea, dst); + } +} + +static void I386OP(groupF7_16)(void) // Opcode 0xf7 +{ + UINT8 modrm = FETCH(); + + switch( (modrm >> 3) & 0x7 ) + { + case 0: /* TEST Rm16, i16 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT16 src = FETCH16(); + dst &= src; + I.CF = I.OF = I.AF = 0; + SetSZPF16(dst); + CYCLES(CYCLES_TEST_IMM_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT16 src = FETCH16(); + dst &= src; + I.CF = I.OF = I.AF = 0; + SetSZPF16(dst); + CYCLES(CYCLES_TEST_IMM_MEM); + } + break; + case 2: /* NOT Rm16 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + dst = ~dst; + STORE_RM16(modrm, dst); + CYCLES(CYCLES_NOT_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + dst = ~dst; + WRITE16(ea, dst); + CYCLES(CYCLES_NOT_MEM); + } + break; + case 3: /* NEG Rm16 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + dst = SUB16( 0, dst ); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_NEG_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + dst = SUB16( 0, dst ); + WRITE16(ea, dst); + CYCLES(CYCLES_NEG_MEM); + } + break; + case 4: /* MUL AX, Rm16 */ + { + UINT32 result; + UINT16 src, dst; + if( modrm >= 0xc0 ) { + src = LOAD_RM16(modrm); + CYCLES(CYCLES_MUL16_ACC_REG); /* TODO: Correct multiply timing */ + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + CYCLES(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; + + I.CF = I.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(CYCLES_IMUL16_ACC_REG); /* TODO: Correct multiply timing */ + } else { + UINT32 ea = GetEA(modrm); + src = (INT32)(INT16)READ16(ea); + CYCLES(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; + + I.CF = I.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(CYCLES_DIV16_ACC_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + CYCLES(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; + } + } 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(CYCLES_IDIV16_ACC_REG); + } else { + UINT32 ea = GetEA(modrm); + src = READ16(ea); + CYCLES(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; + } + } else { + /* TODO: Divide by zero */ + } + } + break; + } +} + +static void I386OP(groupFF_16)(void) // Opcode 0xff +{ + UINT8 modrm = FETCH(); + + switch( (modrm >> 3) & 0x7 ) + { + case 0: /* INC Rm16 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + dst = INC16(dst); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_INC_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + dst = INC16(dst); + WRITE16(ea, dst); + CYCLES(CYCLES_INC_MEM); + } + break; + case 1: /* DEC Rm16 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + dst = DEC16(dst); + STORE_RM16(modrm, dst); + CYCLES(CYCLES_DEC_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + dst = DEC16(dst); + WRITE16(ea, dst); + CYCLES(CYCLES_DEC_MEM); + } + break; + case 2: /* CALL Rm16 */ + { + UINT16 address; + if( modrm >= 0xc0 ) { + address = LOAD_RM16(modrm); + CYCLES(CYCLES_CALL_REG); /* TODO: Timing = 7 + m */ + } else { + UINT32 ea = GetEA(modrm); + address = READ16(ea); + CYCLES(CYCLES_CALL_MEM); /* TODO: Timing = 10 + m */ + } + PUSH16( I.eip ); + I.eip = address; + CHANGE_PC(I.eip); + } + break; + case 3: /* CALL FAR Rm16 */ + { + UINT16 address, selector; + if( modrm >= 0xc0 ) { + fatalerror("NYI"); + } else { + UINT32 ea = GetEA(modrm); + address = READ16(ea + 0); + selector = READ16(ea + 2); + CYCLES(CYCLES_CALL_MEM_INTERSEG); /* TODO: Timing = 10 + m */ + } + PUSH16( I.sreg[CS].selector ); + PUSH16( I.eip ); + I.sreg[CS].selector = selector; + I.performed_intersegment_jump = 1; + i386_load_segment_descriptor( CS ); + I.eip = address; + CHANGE_PC(I.eip); + } + break; + case 4: /* JMP Rm16 */ + { + UINT16 address; + if( modrm >= 0xc0 ) { + address = LOAD_RM16(modrm); + CYCLES(CYCLES_JMP_REG); /* TODO: Timing = 7 + m */ + } else { + UINT32 ea = GetEA(modrm); + address = READ16(ea); + CYCLES(CYCLES_JMP_MEM); /* TODO: Timing = 10 + m */ + } + I.eip = address; + CHANGE_PC(I.eip); + } + break; + case 5: /* JMP FAR Rm16 */ + { + UINT16 address, selector; + if( modrm >= 0xc0 ) { + fatalerror("NYI"); + } else { + UINT32 ea = GetEA(modrm); + address = READ16(ea + 0); + selector = READ16(ea + 2); + CYCLES(CYCLES_JMP_MEM_INTERSEG); /* TODO: Timing = 10 + m */ + } + I.sreg[CS].selector = selector; + I.performed_intersegment_jump = 1; + i386_load_segment_descriptor( CS ); + I.eip = address; + CHANGE_PC(I.eip); + } + break; + case 6: /* PUSH Rm16 */ + { + UINT16 value; + if( modrm >= 0xc0 ) { + value = LOAD_RM16(modrm); + } else { + UINT32 ea = GetEA(modrm); + value = READ16(ea); + } + PUSH16(value); + CYCLES(CYCLES_PUSH_RM); + } + break; + case 7: + I386OP(invalid)(); + break; + default: + fatalerror("i386: groupFF_16 /%d unimplemented", (modrm >> 3) & 0x7); + break; + } +} + +static void I386OP(group0F00_16)(void) // Opcode 0x0f 00 +{ + UINT32 address, ea; + UINT8 modrm = FETCH(); + + switch( (modrm >> 3) & 0x7 ) + { + case 2: /* LLDT */ + if ( PROTECTED_MODE && !V8086_MODE ) + { + if( modrm >= 0xc0 ) { + address = LOAD_RM16(modrm); + ea = i386_translate( CS, address ); + CYCLES(CYCLES_LLDT_REG); + } else { + ea = GetEA(modrm); + CYCLES(CYCLES_LLDT_MEM); + } + I.ldtr.segment = READ16(ea); + } + else + { + i386_trap(6, 0); + } + break; + + case 3: /* LTR */ + if ( PROTECTED_MODE && !V8086_MODE ) + { + if( modrm >= 0xc0 ) { + address = LOAD_RM16(modrm); + ea = i386_translate( CS, address ); + CYCLES(CYCLES_LTR_REG); + } else { + ea = GetEA(modrm); + CYCLES(CYCLES_LTR_MEM); + } + I.task.segment = READ16(ea); + } + else + { + i386_trap(6, 0); + } + break; + + default: + fatalerror("i386: group0F00_16 /%d unimplemented", (modrm >> 3) & 0x7); + break; + } +} + +static void I386OP(group0F01_16)(void) // Opcode 0x0f 01 +{ + UINT8 modrm = FETCH(); + UINT16 address; + UINT32 ea; + + switch( (modrm >> 3) & 0x7 ) + { + case 0: /* SGDT */ + { + if( modrm >= 0xc0 ) { + address = LOAD_RM16(modrm); + ea = i386_translate( CS, address ); + } else { + ea = GetEA(modrm); + } + WRITE16(ea, I.gdtr.limit); + WRITE32(ea + 2, I.gdtr.base & 0xffffff); + CYCLES(CYCLES_SGDT); + break; + } + case 1: /* SIDT */ + { + if (modrm >= 0xc0) + { + address = LOAD_RM16(modrm); + ea = i386_translate( CS, address ); + } + else + { + ea = GetEA(modrm); + } + WRITE16(ea, I.idtr.limit); + WRITE32(ea + 2, I.idtr.base & 0xffffff); + CYCLES(CYCLES_SIDT); + break; + } + case 2: /* LGDT */ + { + if( modrm >= 0xc0 ) { + address = LOAD_RM16(modrm); + ea = i386_translate( CS, address ); + } else { + ea = GetEA(modrm); + } + I.gdtr.limit = READ16(ea); + I.gdtr.base = READ32(ea + 2) & 0xffffff; + CYCLES(CYCLES_LGDT); + break; + } + case 3: /* LIDT */ + { + if( modrm >= 0xc0 ) { + address = LOAD_RM16(modrm); + ea = i386_translate( CS, address ); + } else { + ea = GetEA(modrm); + } + I.idtr.limit = READ16(ea); + I.idtr.base = READ32(ea + 2) & 0xffffff; + CYCLES(CYCLES_LIDT); + break; + } + case 4: /* SMSW */ + { + if( modrm >= 0xc0 ) { + STORE_RM16(modrm, I.cr[0]); + CYCLES(CYCLES_SMSW_REG); + } else { + UINT32 ea = GetEA(modrm); + WRITE16(ea, I.cr[0]); + CYCLES(CYCLES_SMSW_MEM); + } + break; + } + case 6: /* LMSW */ + { + // TODO: Check for protection fault + UINT8 b; + if( modrm >= 0xc0 ) { + b = LOAD_RM8(modrm); + CYCLES(CYCLES_LMSW_REG); + } else { + ea = GetEA(modrm); + CYCLES(CYCLES_LMSW_MEM); + b = READ8(ea); + } + I.cr[0] &= ~0x03; + I.cr[0] |= b & 0x03; + break; + } + default: + fatalerror("i386: unimplemented opcode 0x0f 01 /%d at %08X", (modrm >> 3) & 0x7, I.eip - 2); + break; + } +} + +static void I386OP(group0FBA_16)(void) // Opcode 0x0f ba +{ + UINT8 modrm = FETCH(); + + switch( (modrm >> 3) & 0x7 ) + { + case 4: /* BT Rm16, i8 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + + CYCLES(CYCLES_BT_IMM_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + + CYCLES(CYCLES_BT_IMM_MEM); + } + break; + case 5: /* BTS Rm16, i8 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst |= (1 << bit); + + STORE_RM16(modrm, dst); + CYCLES(CYCLES_BTS_IMM_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst |= (1 << bit); + + WRITE16(ea, dst); + CYCLES(CYCLES_BTS_IMM_MEM); + } + break; + case 6: /* BTR Rm16, i8 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst &= ~(1 << bit); + + STORE_RM16(modrm, dst); + CYCLES(CYCLES_BTR_IMM_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst &= ~(1 << bit); + + WRITE16(ea, dst); + CYCLES(CYCLES_BTR_IMM_MEM); + } + break; + case 7: /* BTC Rm16, i8 */ + if( modrm >= 0xc0 ) { + UINT16 dst = LOAD_RM16(modrm); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst ^= (1 << bit); + + STORE_RM16(modrm, dst); + CYCLES(CYCLES_BTC_IMM_REG); + } else { + UINT32 ea = GetEA(modrm); + UINT16 dst = READ16(ea); + UINT8 bit = FETCH(); + + if( dst & (1 << bit) ) + I.CF = 1; + else + I.CF = 0; + dst ^= (1 << bit); + + WRITE16(ea, dst); + CYCLES(CYCLES_BTC_IMM_MEM); + } + break; + default: + fatalerror("i386: group0FBA_16 /%d unknown", (modrm >> 3) & 0x7); + break; + } +} + +static void I386OP(bound_r16_m16_m16)(void) // Opcode 0x62 +{ + UINT8 modrm; + INT16 val, low, high; + + modrm = FETCH(); + + if (modrm >= 0xc0) + { + low = high = LOAD_RM16(modrm); + } + else + { + UINT32 ea = GetEA(modrm); + low = READ16(ea + 0); + high = READ16(ea + 2); + } + val = LOAD_REG16(modrm); + + if ((val < low) || (val > high)) + { + CYCLES(CYCLES_BOUND_OUT_RANGE); + i386_trap(5, 0); + } + else + { + CYCLES(CYCLES_BOUND_IN_RANGE); + } +} + +static void I386OP(retf16)(void) // Opcode 0xcb +{ + I.eip = POP16(); + I.sreg[CS].selector = POP16(); + i386_load_segment_descriptor( CS ); + CHANGE_PC(I.eip); + + CYCLES(CYCLES_RET_INTERSEG); +} + +static void I386OP(retf_i16)(void) // Opcode 0xca +{ + UINT16 count = FETCH16(); + + I.eip = POP16(); + I.sreg[CS].selector = POP16(); + i386_load_segment_descriptor( CS ); + CHANGE_PC(I.eip); + + REG16(SP) += count; + CYCLES(CYCLES_RET_IMM_INTERSEG); +} + +static void I386OP(xlat16)(void) // Opcode 0xd7 +{ + UINT32 ea; + if( I.segment_prefix ) { + ea = i386_translate( I.segment_override, REG16(BX) + REG8(AL) ); + } else { + ea = i386_translate( DS, REG16(BX) + REG8(AL) ); + } + REG8(AL) = READ8(ea); + CYCLES(CYCLES_XLAT); +} + +static void I386OP(load_far_pointer16)(int s) +{ + UINT8 modrm = FETCH(); + + if( modrm >= 0xc0 ) { + fatalerror("NYI"); + } else { + UINT32 ea = GetEA(modrm); + STORE_REG16(modrm, READ16(ea + 0)); + I.sreg[s].selector = READ16(ea + 2); + i386_load_segment_descriptor( s ); + } +} + +static void I386OP(lds16)(void) // Opcode 0xc5 +{ + I386OP(load_far_pointer16)(DS); + CYCLES(CYCLES_LDS); +} + +static void I386OP(lss16)(void) // Opcode 0x0f 0xb2 +{ + I386OP(load_far_pointer16)(SS); + CYCLES(CYCLES_LSS); +} + +static void I386OP(les16)(void) // Opcode 0xc4 +{ + I386OP(load_far_pointer16)(ES); + CYCLES(CYCLES_LES); +} + +static void I386OP(lfs16)(void) // Opcode 0x0f 0xb4 +{ + I386OP(load_far_pointer16)(FS); + CYCLES(CYCLES_LFS); +} + +static void I386OP(lgs16)(void) // Opcode 0x0f 0xb5 +{ + I386OP(load_far_pointer16)(GS); + CYCLES(CYCLES_LGS); +} + |