/* * Tiny Code Generator for QEMU * * Copyright (c) 2008 Fabrice Bellard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ const char *tcg_target_reg_names[TCG_TARGET_NB_REGS] = { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi", }; int tcg_target_reg_alloc_order[] = { TCG_REG_EAX, TCG_REG_EDX, TCG_REG_ECX, TCG_REG_EBX, TCG_REG_ESI, TCG_REG_EDI, TCG_REG_EBP, TCG_REG_ESP, }; const int tcg_target_call_iarg_regs[3] = { TCG_REG_EAX, TCG_REG_EDX, TCG_REG_ECX }; const int tcg_target_call_oarg_regs[2] = { TCG_REG_EAX, TCG_REG_EDX }; static void patch_reloc(uint8_t *code_ptr, int type, tcg_target_long value, tcg_target_long addend) { value += addend; switch(type) { case R_386_32: *(uint32_t *)code_ptr = value; break; case R_386_PC32: *(uint32_t *)code_ptr = value - (long)code_ptr; break; default: tcg_abort(); } } /* maximum number of register used for input function arguments */ static inline int tcg_target_get_call_iarg_regs_count(int flags) { flags &= TCG_CALL_TYPE_MASK; switch(flags) { case TCG_CALL_TYPE_STD: return 0; case TCG_CALL_TYPE_REGPARM_1: case TCG_CALL_TYPE_REGPARM_2: case TCG_CALL_TYPE_REGPARM: return flags - TCG_CALL_TYPE_REGPARM_1 + 1; default: tcg_abort(); } } /* parse target specific constraints */ int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str) { const char *ct_str; ct_str = *pct_str; switch(ct_str[0]) { case 'a': ct->ct |= TCG_CT_REG; tcg_regset_set_reg(ct->u.regs, TCG_REG_EAX); break; case 'b': ct->ct |= TCG_CT_REG; tcg_regset_set_reg(ct->u.regs, TCG_REG_EBX); break; case 'c': ct->ct |= TCG_CT_REG; tcg_regset_set_reg(ct->u.regs, TCG_REG_ECX); break; case 'd': ct->ct |= TCG_CT_REG; tcg_regset_set_reg(ct->u.regs, TCG_REG_EDX); break; case 'S': ct->ct |= TCG_CT_REG; tcg_regset_set_reg(ct->u.regs, TCG_REG_ESI); break; case 'D': ct->ct |= TCG_CT_REG; tcg_regset_set_reg(ct->u.regs, TCG_REG_EDI); break; case 'q': ct->ct |= TCG_CT_REG; tcg_regset_set32(ct->u.regs, 0, 0xf); break; case 'r': ct->ct |= TCG_CT_REG; tcg_regset_set32(ct->u.regs, 0, 0xff); break; /* qemu_ld/st address constraint */ case 'L': ct->ct |= TCG_CT_REG; tcg_regset_set32(ct->u.regs, 0, 0xff); tcg_regset_reset_reg(ct->u.regs, TCG_REG_EAX); tcg_regset_reset_reg(ct->u.regs, TCG_REG_EDX); break; default: return -1; } ct_str++; *pct_str = ct_str; return 0; } /* test if a constant matches the constraint */ static inline int tcg_target_const_match(tcg_target_long val, const TCGArgConstraint *arg_ct) { int ct; ct = arg_ct->ct; if (ct & TCG_CT_CONST) return 1; else return 0; } #define ARITH_ADD 0 #define ARITH_OR 1 #define ARITH_ADC 2 #define ARITH_SBB 3 #define ARITH_AND 4 #define ARITH_SUB 5 #define ARITH_XOR 6 #define ARITH_CMP 7 #define SHIFT_SHL 4 #define SHIFT_SHR 5 #define SHIFT_SAR 7 #define JCC_JMP (-1) #define JCC_JO 0x0 #define JCC_JNO 0x1 #define JCC_JB 0x2 #define JCC_JAE 0x3 #define JCC_JE 0x4 #define JCC_JNE 0x5 #define JCC_JBE 0x6 #define JCC_JA 0x7 #define JCC_JS 0x8 #define JCC_JNS 0x9 #define JCC_JP 0xa #define JCC_JNP 0xb #define JCC_JL 0xc #define JCC_JGE 0xd #define JCC_JLE 0xe #define JCC_JG 0xf #define P_EXT 0x100 /* 0x0f opcode prefix */ static const uint8_t tcg_cond_to_jcc[10] = { [TCG_COND_EQ] = JCC_JE, [TCG_COND_NE] = JCC_JNE, [TCG_COND_LT] = JCC_JL, [TCG_COND_GE] = JCC_JGE, [TCG_COND_LE] = JCC_JLE, [TCG_COND_GT] = JCC_JG, [TCG_COND_LTU] = JCC_JB, [TCG_COND_GEU] = JCC_JAE, [TCG_COND_LEU] = JCC_JBE, [TCG_COND_GTU] = JCC_JA, }; static inline void tcg_out_opc(TCGContext *s, int opc) { if (opc & P_EXT) tcg_out8(s, 0x0f); tcg_out8(s, opc); } static inline void tcg_out_modrm(TCGContext *s, int opc, int r, int rm) { tcg_out_opc(s, opc); tcg_out8(s, 0xc0 | (r << 3) | rm); } /* rm == -1 means no register index */ static inline void tcg_out_modrm_offset(TCGContext *s, int opc, int r, int rm, int32_t offset) { tcg_out_opc(s, opc); if (rm == -1) { tcg_out8(s, 0x05 | (r << 3)); tcg_out32(s, offset); } else if (offset == 0 && rm != TCG_REG_EBP) { if (rm == TCG_REG_ESP) { tcg_out8(s, 0x04 | (r << 3)); tcg_out8(s, 0x24); } else { tcg_out8(s, 0x00 | (r << 3) | rm); } } else if ((int8_t)offset == offset) { if (rm == TCG_REG_ESP) { tcg_out8(s, 0x44 | (r << 3)); tcg_out8(s, 0x24); } else { tcg_out8(s, 0x40 | (r << 3) | rm); } tcg_out8(s, offset); } else { if (rm == TCG_REG_ESP) { tcg_out8(s, 0x84 | (r << 3)); tcg_out8(s, 0x24); } else { tcg_out8(s, 0x80 | (r << 3) | rm); } tcg_out32(s, offset); } } static inline void tcg_out_mov(TCGContext *s, int ret, int arg) { if (arg != ret) tcg_out_modrm(s, 0x8b, ret, arg); } static inline void tcg_out_movi(TCGContext *s, TCGType type, int ret, int32_t arg) { if (arg == 0) { /* xor r0,r0 */ tcg_out_modrm(s, 0x01 | (ARITH_XOR << 3), ret, ret); } else { tcg_out8(s, 0xb8 + ret); tcg_out32(s, arg); } } static inline void tcg_out_ld(TCGContext *s, TCGType type, int ret, int arg1, tcg_target_long arg2) { /* movl */ tcg_out_modrm_offset(s, 0x8b, ret, arg1, arg2); } static inline void tcg_out_st(TCGContext *s, TCGType type, int arg, int arg1, tcg_target_long arg2) { /* movl */ tcg_out_modrm_offset(s, 0x89, arg, arg1, arg2); } static inline void tgen_arithi(TCGContext *s, int c, int r0, int32_t val) { if (val == (int8_t)val) { tcg_out_modrm(s, 0x83, c, r0); tcg_out8(s, val); } else { tcg_out_modrm(s, 0x81, c, r0); tcg_out32(s, val); } } void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val) { if (val != 0) tgen_arithi(s, ARITH_ADD, reg, val); } static void tcg_out_jxx(TCGContext *s, int opc, int label_index) { int32_t val, val1; TCGLabel *l = &s->labels[label_index]; if (l->has_value) { val = l->u.value - (tcg_target_long)s->code_ptr; val1 = val - 2; if ((int8_t)val1 == val1) { if (opc == -1) tcg_out8(s, 0xeb); else tcg_out8(s, 0x70 + opc); tcg_out8(s, val1); } else { if (opc == -1) { tcg_out8(s, 0xe9); tcg_out32(s, val - 5); } else { tcg_out8(s, 0x0f); tcg_out8(s, 0x80 + opc); tcg_out32(s, val - 6); } } } else { if (opc == -1) { tcg_out8(s, 0xe9); } else { tcg_out8(s, 0x0f); tcg_out8(s, 0x80 + opc); } tcg_out_reloc(s, s->code_ptr, R_386_PC32, label_index, -4); s->code_ptr += 4; } } static void tcg_out_brcond(TCGContext *s, int cond, TCGArg arg1, TCGArg arg2, int const_arg2, int label_index) { int c; if (const_arg2) { if (arg2 == 0) { /* use test */ switch(cond) { case TCG_COND_EQ: c = JCC_JE; break; case TCG_COND_NE: c = JCC_JNE; break; case TCG_COND_LT: c = JCC_JS; break; case TCG_COND_GE: c = JCC_JNS; break; default: goto do_cmpi; } /* test r, r */ tcg_out_modrm(s, 0x85, arg1, arg1); tcg_out_jxx(s, c, label_index); } else { do_cmpi: tgen_arithi(s, ARITH_CMP, arg1, arg2); tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index); } } else { tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3), arg2, arg1); tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index); } } /* XXX: we implement it at the target level to avoid having to handle cross basic blocks temporaries */ static void tcg_out_brcond2(TCGContext *s, const TCGArg *args, const int *const_args) { int label_next; label_next = gen_new_label(); switch(args[4]) { case TCG_COND_EQ: tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], label_next); tcg_out_brcond(s, TCG_COND_EQ, args[1], args[3], const_args[3], args[5]); break; case TCG_COND_NE: tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], args[5]); break; case TCG_COND_LT: tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_LT, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_LE: tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_LE, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GT: tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_GT, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GE: tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_GE, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_LTU: tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_LEU: tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GTU: tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GEU: tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]); tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], args[5]); break; default: tcg_abort(); } tcg_out_label(s, label_next, (tcg_target_long)s->code_ptr); } #if defined(CONFIG_SOFTMMU) extern void __ldb_mmu(void); extern void __ldw_mmu(void); extern void __ldl_mmu(void); extern void __ldq_mmu(void); extern void __stb_mmu(void); extern void __stw_mmu(void); extern void __stl_mmu(void); extern void __stq_mmu(void); static void *qemu_ld_helpers[4] = { __ldb_mmu, __ldw_mmu, __ldl_mmu, __ldq_mmu, }; static void *qemu_st_helpers[4] = { __stb_mmu, __stw_mmu, __stl_mmu, __stq_mmu, }; #endif /* XXX: qemu_ld and qemu_st could be modified to clobber only EDX and EAX. It will be useful once fixed registers globals are less common. */ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc) { int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap; #if defined(CONFIG_SOFTMMU) uint8_t *label1_ptr, *label2_ptr; #endif #if TARGET_LONG_BITS == 64 #if defined(CONFIG_SOFTMMU) uint8_t *label3_ptr; #endif int addr_reg2; #endif data_reg = *args++; if (opc == 3) data_reg2 = *args++; else data_reg2 = 0; addr_reg = *args++; #if TARGET_LONG_BITS == 64 addr_reg2 = *args++; #endif mem_index = *args; s_bits = opc & 3; r0 = TCG_REG_EAX; r1 = TCG_REG_EDX; #if defined(CONFIG_SOFTMMU) tcg_out_mov(s, r1, addr_reg); tcg_out_mov(s, r0, addr_reg); tcg_out_modrm(s, 0xc1, 5, r1); /* shr $x, r1 */ tcg_out8(s, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); tcg_out_modrm(s, 0x81, 4, r0); /* andl $x, r0 */ tcg_out32(s, TARGET_PAGE_MASK | ((1 << s_bits) - 1)); tcg_out_modrm(s, 0x81, 4, r1); /* andl $x, r1 */ tcg_out32(s, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS); tcg_out_opc(s, 0x8d); /* lea offset(r1, %ebp), r1 */ tcg_out8(s, 0x80 | (r1 << 3) | 0x04); tcg_out8(s, (5 << 3) | r1); tcg_out32(s, offsetof(CPUState, tlb_table[mem_index][0].addr_read)); /* cmp 0(r1), r0 */ tcg_out_modrm_offset(s, 0x3b, r0, r1, 0); tcg_out_mov(s, r0, addr_reg); #if TARGET_LONG_BITS == 32 /* je label1 */ tcg_out8(s, 0x70 + JCC_JE); label1_ptr = s->code_ptr; s->code_ptr++; #else /* jne label3 */ tcg_out8(s, 0x70 + JCC_JNE); label3_ptr = s->code_ptr; s->code_ptr++; /* cmp 4(r1), addr_reg2 */ tcg_out_modrm_offset(s, 0x3b, addr_reg2, r1, 4); /* je label1 */ tcg_out8(s, 0x70 + JCC_JE); label1_ptr = s->code_ptr; s->code_ptr++; /* label3: */ *label3_ptr = s->code_ptr - label3_ptr - 1; #endif /* XXX: move that code at the end of the TB */ #if TARGET_LONG_BITS == 32 tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_EDX, mem_index); #else tcg_out_mov(s, TCG_REG_EDX, addr_reg2); tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index); #endif tcg_out8(s, 0xe8); tcg_out32(s, (tcg_target_long)qemu_ld_helpers[s_bits] - (tcg_target_long)s->code_ptr - 4); switch(opc) { case 0 | 4: /* movsbl */ tcg_out_modrm(s, 0xbe | P_EXT, data_reg, TCG_REG_EAX); break; case 1 | 4: /* movswl */ tcg_out_modrm(s, 0xbf | P_EXT, data_reg, TCG_REG_EAX); break; case 0: case 1: case 2: default: tcg_out_mov(s, data_reg, TCG_REG_EAX); break; case 3: if (data_reg == TCG_REG_EDX) { tcg_out_opc(s, 0x90 + TCG_REG_EDX); /* xchg %edx, %eax */ tcg_out_mov(s, data_reg2, TCG_REG_EAX); } else { tcg_out_mov(s, data_reg, TCG_REG_EAX); tcg_out_mov(s, data_reg2, TCG_REG_EDX); } break; } /* jmp label2 */ tcg_out8(s, 0xeb); label2_ptr = s->code_ptr; s->code_ptr++; /* label1: */ *label1_ptr = s->code_ptr - label1_ptr - 1; /* add x(r1), r0 */ tcg_out_modrm_offset(s, 0x03, r0, r1, offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read)); #else r0 = addr_reg; #endif #ifdef TARGET_WORDS_BIGENDIAN bswap = 1; #else bswap = 0; #endif switch(opc) { case 0: /* movzbl */ tcg_out_modrm_offset(s, 0xb6 | P_EXT, data_reg, r0, 0); break; case 0 | 4: /* movsbl */ tcg_out_modrm_offset(s, 0xbe | P_EXT, data_reg, r0, 0); break; case 1: /* movzwl */ tcg_out_modrm_offset(s, 0xb7 | P_EXT, data_reg, r0, 0); if (bswap) { /* rolw $8, data_reg */ tcg_out8(s, 0x66); tcg_out_modrm(s, 0xc1, 0, data_reg); tcg_out8(s, 8); } break; case 1 | 4: /* movswl */ tcg_out_modrm_offset(s, 0xbf | P_EXT, data_reg, r0, 0); if (bswap) { /* rolw $8, data_reg */ tcg_out8(s, 0x66); tcg_out_modrm(s, 0xc1, 0, data_reg); tcg_out8(s, 8); /* movswl data_reg, data_reg */ tcg_out_modrm(s, 0xbf | P_EXT, data_reg, data_reg); } break; case 2: /* movl (r0), data_reg */ tcg_out_modrm_offset(s, 0x8b, data_reg, r0, 0); if (bswap) { /* bswap */ tcg_out_opc(s, (0xc8 + data_reg) | P_EXT); } break; case 3: /* XXX: could be nicer */ if (r0 == data_reg) { r1 = TCG_REG_EDX; if (r1 == data_reg) r1 = TCG_REG_EAX; tcg_out_mov(s, r1, r0); r0 = r1; } if (!bswap) { tcg_out_modrm_offset(s, 0x8b, data_reg, r0, 0); tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, 4); } else { tcg_out_modrm_offset(s, 0x8b, data_reg, r0, 4); tcg_out_opc(s, (0xc8 + data_reg) | P_EXT); tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, 0); /* bswap */ tcg_out_opc(s, (0xc8 + data_reg2) | P_EXT); } break; default: tcg_abort(); } #if defined(CONFIG_SOFTMMU) /* label2: */ *label2_ptr = s->code_ptr - label2_ptr - 1; #endif } static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc) { int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap; #if defined(CONFIG_SOFTMMU) uint8_t *label1_ptr, *label2_ptr; #endif #if TARGET_LONG_BITS == 64 #if defined(CONFIG_SOFTMMU) uint8_t *label3_ptr; #endif int addr_reg2; #endif data_reg = *args++; if (opc == 3) data_reg2 = *args++; else data_reg2 = 0; addr_reg = *args++; #if TARGET_LONG_BITS == 64 addr_reg2 = *args++; #endif mem_index = *args; s_bits = opc; r0 = TCG_REG_EAX; r1 = TCG_REG_EDX; #if defined(CONFIG_SOFTMMU) tcg_out_mov(s, r1, addr_reg); tcg_out_mov(s, r0, addr_reg); tcg_out_modrm(s, 0xc1, 5, r1); /* shr $x, r1 */ tcg_out8(s, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); tcg_out_modrm(s, 0x81, 4, r0); /* andl $x, r0 */ tcg_out32(s, TARGET_PAGE_MASK | ((1 << s_bits) - 1)); tcg_out_modrm(s, 0x81, 4, r1); /* andl $x, r1 */ tcg_out32(s, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS); tcg_out_opc(s, 0x8d); /* lea offset(r1, %ebp), r1 */ tcg_out8(s, 0x80 | (r1 << 3) | 0x04); tcg_out8(s, (5 << 3) | r1); tcg_out32(s, offsetof(CPUState, tlb_table[mem_index][0].addr_write)); /* cmp 0(r1), r0 */ tcg_out_modrm_offset(s, 0x3b, r0, r1, 0); tcg_out_mov(s, r0, addr_reg); #if TARGET_LONG_BITS == 32 /* je label1 */ tcg_out8(s, 0x70 + JCC_JE); label1_ptr = s->code_ptr; s->code_ptr++; #else /* jne label3 */ tcg_out8(s, 0x70 + JCC_JNE); label3_ptr = s->code_ptr; s->code_ptr++; /* cmp 4(r1), addr_reg2 */ tcg_out_modrm_offset(s, 0x3b, addr_reg2, r1, 4); /* je label1 */ tcg_out8(s, 0x70 + JCC_JE); label1_ptr = s->code_ptr; s->code_ptr++; /* label3: */ *label3_ptr = s->code_ptr - label3_ptr - 1; #endif /* XXX: move that code at the end of the TB */ #if TARGET_LONG_BITS == 32 if (opc == 3) { tcg_out_mov(s, TCG_REG_EDX, data_reg); tcg_out_mov(s, TCG_REG_ECX, data_reg2); tcg_out8(s, 0x6a); /* push Ib */ tcg_out8(s, mem_index); tcg_out8(s, 0xe8); tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - (tcg_target_long)s->code_ptr - 4); tcg_out_addi(s, TCG_REG_ESP, 4); } else { switch(opc) { case 0: /* movzbl */ tcg_out_modrm(s, 0xb6 | P_EXT, TCG_REG_EDX, data_reg); break; case 1: /* movzwl */ tcg_out_modrm(s, 0xb7 | P_EXT, TCG_REG_EDX, data_reg); break; case 2: tcg_out_mov(s, TCG_REG_EDX, data_reg); break; } tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index); tcg_out8(s, 0xe8); tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - (tcg_target_long)s->code_ptr - 4); } #else if (opc == 3) { tcg_out_mov(s, TCG_REG_EDX, addr_reg2); tcg_out8(s, 0x6a); /* push Ib */ tcg_out8(s, mem_index); tcg_out_opc(s, 0x50 + data_reg2); /* push */ tcg_out_opc(s, 0x50 + data_reg); /* push */ tcg_out8(s, 0xe8); tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - (tcg_target_long)s->code_ptr - 4); tcg_out_addi(s, TCG_REG_ESP, 12); } else { tcg_out_mov(s, TCG_REG_EDX, addr_reg2); switch(opc) { case 0: /* movzbl */ tcg_out_modrm(s, 0xb6 | P_EXT, TCG_REG_ECX, data_reg); break; case 1: /* movzwl */ tcg_out_modrm(s, 0xb7 | P_EXT, TCG_REG_ECX, data_reg); break; case 2: tcg_out_mov(s, TCG_REG_ECX, data_reg); break; } tcg_out8(s, 0x6a); /* push Ib */ tcg_out8(s, mem_index); tcg_out8(s, 0xe8); tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - (tcg_target_long)s->code_ptr - 4); tcg_out_addi(s, TCG_REG_ESP, 4); } #endif /* jmp label2 */ tcg_out8(s, 0xeb); label2_ptr = s->code_ptr; s->code_ptr++; /* label1: */ *label1_ptr = s->code_ptr - label1_ptr - 1; /* add x(r1), r0 */ tcg_out_modrm_offset(s, 0x03, r0, r1, offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_write)); #else r0 = addr_reg; #endif #ifdef TARGET_WORDS_BIGENDIAN bswap = 1; #else bswap = 0; #endif switch(opc) { case 0: /* movb */ tcg_out_modrm_offset(s, 0x88, data_reg, r0, 0); break; case 1: if (bswap) { tcg_out_mov(s, r1, data_reg); tcg_out8(s, 0x66); /* rolw $8, %ecx */ tcg_out_modrm(s, 0xc1, 0, r1); tcg_out8(s, 8); data_reg = r1; } /* movw */ tcg_out8(s, 0x66); tcg_out_modrm_offset(s, 0x89, data_reg, r0, 0); break; case 2: if (bswap) { tcg_out_mov(s, r1, data_reg); /* bswap data_reg */ tcg_out_opc(s, (0xc8 + r1) | P_EXT); data_reg = r1; } /* movl */ tcg_out_modrm_offset(s, 0x89, data_reg, r0, 0); break; case 3: if (bswap) { tcg_out_mov(s, r1, data_reg2); /* bswap data_reg */ tcg_out_opc(s, (0xc8 + r1) | P_EXT); tcg_out_modrm_offset(s, 0x89, r1, r0, 0); tcg_out_mov(s, r1, data_reg); /* bswap data_reg */ tcg_out_opc(s, (0xc8 + r1) | P_EXT); tcg_out_modrm_offset(s, 0x89, r1, r0, 4); } else { tcg_out_modrm_offset(s, 0x89, data_reg, r0, 0); tcg_out_modrm_offset(s, 0x89, data_reg2, r0, 4); } break; default: tcg_abort(); } #if defined(CONFIG_SOFTMMU) /* label2: */ *label2_ptr = s->code_ptr - label2_ptr - 1; #endif } static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args, const int *const_args) { int c; switch(opc) { case INDEX_op_exit_tb: tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_EAX, args[0]); tcg_out8(s, 0xc3); /* ret */ break; case INDEX_op_goto_tb: if (s->tb_jmp_offset) { /* direct jump method */ tcg_out8(s, 0xe9); /* jmp im */ s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf; tcg_out32(s, 0); } else { /* indirect jump method */ /* jmp Ev */ tcg_out_modrm_offset(s, 0xff, 4, -1, (tcg_target_long)(s->tb_next + args[0])); } s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf; break; case INDEX_op_call: if (const_args[0]) { tcg_out8(s, 0xe8); tcg_out32(s, args[0] - (tcg_target_long)s->code_ptr - 4); } else { tcg_out_modrm(s, 0xff, 2, args[0]); } break; case INDEX_op_jmp: if (const_args[0]) { tcg_out8(s, 0xe9); tcg_out32(s, args[0] - (tcg_target_long)s->code_ptr - 4); } else { tcg_out_modrm(s, 0xff, 4, args[0]); } break; case INDEX_op_br: tcg_out_jxx(s, JCC_JMP, args[0]); break; case INDEX_op_movi_i32: tcg_out_movi(s, TCG_TYPE_I32, args[0], args[1]); break; case INDEX_op_ld8u_i32: /* movzbl */ tcg_out_modrm_offset(s, 0xb6 | P_EXT, args[0], args[1], args[2]); break; case INDEX_op_ld8s_i32: /* movsbl */ tcg_out_modrm_offset(s, 0xbe | P_EXT, args[0], args[1], args[2]); break; case INDEX_op_ld16u_i32: /* movzwl */ tcg_out_modrm_offset(s, 0xb7 | P_EXT, args[0], args[1], args[2]); break; case INDEX_op_ld16s_i32: /* movswl */ tcg_out_modrm_offset(s, 0xbf | P_EXT, args[0], args[1], args[2]); break; case INDEX_op_ld_i32: /* movl */ tcg_out_modrm_offset(s, 0x8b, args[0], args[1], args[2]); break; case INDEX_op_st8_i32: /* movb */ tcg_out_modrm_offset(s, 0x88, args[0], args[1], args[2]); break; case INDEX_op_st16_i32: /* movw */ tcg_out8(s, 0x66); tcg_out_modrm_offset(s, 0x89, args[0], args[1], args[2]); break; case INDEX_op_st_i32: /* movl */ tcg_out_modrm_offset(s, 0x89, args[0], args[1], args[2]); break; case INDEX_op_sub_i32: c = ARITH_SUB; goto gen_arith; case INDEX_op_and_i32: c = ARITH_AND; goto gen_arith; case INDEX_op_or_i32: c = ARITH_OR; goto gen_arith; case INDEX_op_xor_i32: c = ARITH_XOR; goto gen_arith; case INDEX_op_add_i32: c = ARITH_ADD; gen_arith: if (const_args[2]) { tgen_arithi(s, c, args[0], args[2]); } else { tcg_out_modrm(s, 0x01 | (c << 3), args[2], args[0]); } break; case INDEX_op_mul_i32: if (const_args[2]) { int32_t val; val = args[2]; if (val == (int8_t)val) { tcg_out_modrm(s, 0x6b, args[0], args[0]); tcg_out8(s, val); } else { tcg_out_modrm(s, 0x69, args[0], args[0]); tcg_out32(s, val); } } else { tcg_out_modrm(s, 0xaf | P_EXT, args[0], args[2]); } break; case INDEX_op_mulu2_i32: tcg_out_modrm(s, 0xf7, 4, args[3]); break; case INDEX_op_div2_i32: tcg_out_modrm(s, 0xf7, 7, args[4]); break; case INDEX_op_divu2_i32: tcg_out_modrm(s, 0xf7, 6, args[4]); break; case INDEX_op_shl_i32: c = SHIFT_SHL; gen_shift32: if (const_args[2]) { if (args[2] == 1) { tcg_out_modrm(s, 0xd1, c, args[0]); } else { tcg_out_modrm(s, 0xc1, c, args[0]); tcg_out8(s, args[2]); } } else { tcg_out_modrm(s, 0xd3, c, args[0]); } break; case INDEX_op_shr_i32: c = SHIFT_SHR; goto gen_shift32; case INDEX_op_sar_i32: c = SHIFT_SAR; goto gen_shift32; case INDEX_op_add2_i32: if (const_args[4]) tgen_arithi(s, ARITH_ADD, args[0], args[4]); else tcg_out_modrm(s, 0x01 | (ARITH_ADD << 3), args[4], args[0]); if (const_args[5]) tgen_arithi(s, ARITH_ADC, args[1], args[5]); else tcg_out_modrm(s, 0x01 | (ARITH_ADC << 3), args[5], args[1]); break; case INDEX_op_sub2_i32: if (const_args[4]) tgen_arithi(s, ARITH_SUB, args[0], args[4]); else tcg_out_modrm(s, 0x01 | (ARITH_SUB << 3), args[4], args[0]); if (const_args[5]) tgen_arithi(s, ARITH_SBB, args[1], args[5]); else tcg_out_modrm(s, 0x01 | (ARITH_SBB << 3), args[5], args[1]); break; case INDEX_op_brcond_i32: tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]); break; case INDEX_op_brcond2_i32: tcg_out_brcond2(s, args, const_args); break; case INDEX_op_qemu_ld8u: tcg_out_qemu_ld(s, args, 0); break; case INDEX_op_qemu_ld8s: tcg_out_qemu_ld(s, args, 0 | 4); break; case INDEX_op_qemu_ld16u: tcg_out_qemu_ld(s, args, 1); break; case INDEX_op_qemu_ld16s: tcg_out_qemu_ld(s, args, 1 | 4); break; case INDEX_op_qemu_ld32u: tcg_out_qemu_ld(s, args, 2); break; case INDEX_op_qemu_ld64: tcg_out_qemu_ld(s, args, 3); break; case INDEX_op_qemu_st8: tcg_out_qemu_st(s, args, 0); break; case INDEX_op_qemu_st16: tcg_out_qemu_st(s, args, 1); break; case INDEX_op_qemu_st32: tcg_out_qemu_st(s, args, 2); break; case INDEX_op_qemu_st64: tcg_out_qemu_st(s, args, 3); break; default: tcg_abort(); } } static const TCGTargetOpDef x86_op_defs[] = { { INDEX_op_exit_tb, { } }, { INDEX_op_goto_tb, { } }, { INDEX_op_call, { "ri" } }, { INDEX_op_jmp, { "ri" } }, { INDEX_op_br, { } }, { INDEX_op_mov_i32, { "r", "r" } }, { INDEX_op_movi_i32, { "r" } }, { INDEX_op_ld8u_i32, { "r", "r" } }, { INDEX_op_ld8s_i32, { "r", "r" } }, { INDEX_op_ld16u_i32, { "r", "r" } }, { INDEX_op_ld16s_i32, { "r", "r" } }, { INDEX_op_ld_i32, { "r", "r" } }, { INDEX_op_st8_i32, { "q", "r" } }, { INDEX_op_st16_i32, { "r", "r" } }, { INDEX_op_st_i32, { "r", "r" } }, { INDEX_op_add_i32, { "r", "0", "ri" } }, { INDEX_op_sub_i32, { "r", "0", "ri" } }, { INDEX_op_mul_i32, { "r", "0", "ri" } }, { INDEX_op_mulu2_i32, { "a", "d", "a", "r" } }, { INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } }, { INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } }, { INDEX_op_and_i32, { "r", "0", "ri" } }, { INDEX_op_or_i32, { "r", "0", "ri" } }, { INDEX_op_xor_i32, { "r", "0", "ri" } }, { INDEX_op_shl_i32, { "r", "0", "ci" } }, { INDEX_op_shr_i32, { "r", "0", "ci" } }, { INDEX_op_sar_i32, { "r", "0", "ci" } }, { INDEX_op_brcond_i32, { "r", "ri" } }, { INDEX_op_add2_i32, { "r", "r", "0", "1", "ri", "ri" } }, { INDEX_op_sub2_i32, { "r", "r", "0", "1", "ri", "ri" } }, { INDEX_op_brcond2_i32, { "r", "r", "ri", "ri" } }, #if TARGET_LONG_BITS == 32 { INDEX_op_qemu_ld8u, { "r", "L" } }, { INDEX_op_qemu_ld8s, { "r", "L" } }, { INDEX_op_qemu_ld16u, { "r", "L" } }, { INDEX_op_qemu_ld16s, { "r", "L" } }, { INDEX_op_qemu_ld32u, { "r", "L" } }, { INDEX_op_qemu_ld64, { "r", "r", "L" } }, { INDEX_op_qemu_st8, { "cb", "L" } }, { INDEX_op_qemu_st16, { "L", "L" } }, { INDEX_op_qemu_st32, { "L", "L" } }, { INDEX_op_qemu_st64, { "L", "L", "L" } }, #else { INDEX_op_qemu_ld8u, { "r", "L", "L" } }, { INDEX_op_qemu_ld8s, { "r", "L", "L" } }, { INDEX_op_qemu_ld16u, { "r", "L", "L" } }, { INDEX_op_qemu_ld16s, { "r", "L", "L" } }, { INDEX_op_qemu_ld32u, { "r", "L", "L" } }, { INDEX_op_qemu_ld64, { "r", "r", "L", "L" } }, { INDEX_op_qemu_st8, { "cb", "L", "L" } }, { INDEX_op_qemu_st16, { "L", "L", "L" } }, { INDEX_op_qemu_st32, { "L", "L", "L" } }, { INDEX_op_qemu_st64, { "L", "L", "L", "L" } }, #endif { -1 }, }; void tcg_target_init(TCGContext *s) { /* fail safe */ if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry)) tcg_abort(); tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xff); tcg_regset_set32(tcg_target_call_clobber_regs, 0, (1 << TCG_REG_EAX) | (1 << TCG_REG_EDX) | (1 << TCG_REG_ECX)); tcg_regset_clear(s->reserved_regs); tcg_regset_set_reg(s->reserved_regs, TCG_REG_ESP); tcg_add_target_add_op_defs(x86_op_defs); }