diff options
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/translate.c | 160 |
1 files changed, 53 insertions, 107 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c index f7ceadd..4d65eb3 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -413,64 +413,18 @@ static inline void gen_op_add_reg_T0(TCGMemOp size, int reg) gen_op_mov_reg_v(size, reg, cpu_tmp0); } -static inline void gen_op_addl_A0_reg_sN(int shift, int reg) -{ - tcg_gen_mov_tl(cpu_tmp0, cpu_regs[reg]); - if (shift != 0) - tcg_gen_shli_tl(cpu_tmp0, cpu_tmp0, shift); - tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0); - /* For x86_64, this sets the higher half of register to zero. - For i386, this is equivalent to a nop. */ - tcg_gen_ext32u_tl(cpu_A0, cpu_A0); -} - -static inline void gen_op_movl_A0_seg(int reg) -{ - tcg_gen_ld32u_tl(cpu_A0, cpu_env, offsetof(CPUX86State, segs[reg].base) + REG_L_OFFSET); -} - static inline void gen_op_addl_A0_seg(DisasContext *s, int reg) { tcg_gen_ld_tl(cpu_tmp0, cpu_env, offsetof(CPUX86State, segs[reg].base)); -#ifdef TARGET_X86_64 if (CODE64(s)) { - tcg_gen_andi_tl(cpu_A0, cpu_A0, 0xffffffff); + tcg_gen_ext32u_tl(cpu_A0, cpu_A0); tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0); } else { tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0); - tcg_gen_andi_tl(cpu_A0, cpu_A0, 0xffffffff); + tcg_gen_ext32u_tl(cpu_A0, cpu_A0); } -#else - tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0); -#endif } -#ifdef TARGET_X86_64 -static inline void gen_op_movq_A0_seg(int reg) -{ - tcg_gen_ld_tl(cpu_A0, cpu_env, offsetof(CPUX86State, segs[reg].base)); -} - -static inline void gen_op_addq_A0_seg(int reg) -{ - tcg_gen_ld_tl(cpu_tmp0, cpu_env, offsetof(CPUX86State, segs[reg].base)); - tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0); -} - -static inline void gen_op_movq_A0_reg(int reg) -{ - tcg_gen_mov_tl(cpu_A0, cpu_regs[reg]); -} - -static inline void gen_op_addq_A0_reg_sN(int shift, int reg) -{ - tcg_gen_mov_tl(cpu_tmp0, cpu_regs[reg]); - if (shift != 0) - tcg_gen_shli_tl(cpu_tmp0, cpu_tmp0, shift); - tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0); -} -#endif - static inline void gen_op_ld_v(DisasContext *s, int idx, TCGv t0, TCGv a0) { tcg_gen_qemu_ld_tl(t0, a0, s->mem_index, idx | MO_LE); @@ -496,70 +450,78 @@ static inline void gen_jmp_im(target_ulong pc) gen_op_jmp_v(cpu_tmp0); } -static inline void gen_string_movl_A0_ESI(DisasContext *s) +/* Compute SEG:REG into A0. SEG is selected from the override segment + (OVR_SEG) and the default segment (DEF_SEG). OVR_SEG may be -1 to + indicate no override. */ +static void gen_lea_v_seg(DisasContext *s, TCGv a0, int def_seg, int ovr_seg) { - int override; + TCGMemOp aflag = s->aflag; - override = s->override; - switch (s->aflag) { + switch (aflag) { #ifdef TARGET_X86_64 case MO_64: - if (override >= 0) { - gen_op_movq_A0_seg(override); - gen_op_addq_A0_reg_sN(0, R_ESI); - } else { - gen_op_movq_A0_reg(R_ESI); + if (ovr_seg < 0) { + tcg_gen_mov_tl(cpu_A0, a0); + return; } break; #endif case MO_32: /* 32 bit address */ - if (s->addseg && override < 0) - override = R_DS; - if (override >= 0) { - gen_op_movl_A0_seg(override); - gen_op_addl_A0_reg_sN(0, R_ESI); - } else { - gen_op_movl_A0_reg(R_ESI); + if (ovr_seg < 0) { + if (s->addseg) { + ovr_seg = def_seg; + } else { + tcg_gen_ext32u_tl(cpu_A0, a0); + return; + } } break; case MO_16: - /* 16 address, always override */ - if (override < 0) - override = R_DS; - tcg_gen_ext16u_tl(cpu_A0, cpu_regs[R_ESI]); - gen_op_addl_A0_seg(s, override); + /* 16 bit address */ + if (ovr_seg < 0) { + ovr_seg = def_seg; + } + tcg_gen_ext16u_tl(cpu_A0, a0); + /* ADDSEG will only be false in 16-bit mode for LEA. */ + if (!s->addseg) { + return; + } + a0 = cpu_A0; break; default: tcg_abort(); } -} -static inline void gen_string_movl_A0_EDI(DisasContext *s) -{ - switch (s->aflag) { -#ifdef TARGET_X86_64 - case MO_64: - gen_op_movq_A0_reg(R_EDI); - break; -#endif - case MO_32: - if (s->addseg) { - gen_op_movl_A0_seg(R_ES); - gen_op_addl_A0_reg_sN(0, R_EDI); + if (ovr_seg >= 0) { + TCGv seg = tcg_temp_new(); + + tcg_gen_ld_tl(seg, cpu_env, offsetof(CPUX86State, segs[ovr_seg].base)); + + if (aflag == MO_64) { + tcg_gen_add_tl(cpu_A0, a0, seg); + } else if (CODE64(s)) { + tcg_gen_ext32u_tl(cpu_A0, a0); + tcg_gen_add_tl(cpu_A0, cpu_A0, seg); } else { - gen_op_movl_A0_reg(R_EDI); + tcg_gen_add_tl(cpu_A0, a0, seg); + tcg_gen_ext32u_tl(cpu_A0, cpu_A0); } - break; - case MO_16: - tcg_gen_ext16u_tl(cpu_A0, cpu_regs[R_EDI]); - gen_op_addl_A0_seg(s, R_ES); - break; - default: - tcg_abort(); + + tcg_temp_free(seg); } } +static inline void gen_string_movl_A0_ESI(DisasContext *s) +{ + gen_lea_v_seg(s, cpu_regs[R_ESI], R_DS, s->override); +} + +static inline void gen_string_movl_A0_EDI(DisasContext *s) +{ + gen_lea_v_seg(s, cpu_regs[R_EDI], R_ES, -1); +} + static inline void gen_op_movl_T0_Dshift(TCGMemOp ot) { tcg_gen_ld32s_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, df)); @@ -2115,23 +2077,7 @@ static void gen_nop_modrm(CPUX86State *env, DisasContext *s, int modrm) /* used for LEA and MOV AX, mem */ static void gen_add_A0_ds_seg(DisasContext *s) { - int override, must_add_seg; - must_add_seg = s->addseg; - override = R_DS; - if (s->override >= 0) { - override = s->override; - must_add_seg = 1; - } - if (must_add_seg) { -#ifdef TARGET_X86_64 - if (CODE64(s)) { - gen_op_addq_A0_seg(override); - } else -#endif - { - gen_op_addl_A0_seg(s, override); - } - } + gen_lea_v_seg(s, cpu_A0, R_DS, s->override); } /* generate modrm memory load or store of 'reg'. TMP0 is used if reg == |