| /* |
| * 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, |
| }; |
| |
| 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 uint8_t *tb_ret_addr; |
| |
| 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) |
| { |
| if (const_arg2) { |
| if (arg2 == 0) { |
| /* test r, r */ |
| tcg_out_modrm(s, 0x85, arg1, arg1); |
| } else { |
| tgen_arithi(s, ARITH_CMP, arg1, arg2); |
| } |
| } 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_jxx(s, JCC_JNE, label_next); |
| tcg_out_brcond(s, TCG_COND_LTU, 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_jxx(s, JCC_JNE, label_next); |
| tcg_out_brcond(s, TCG_COND_LEU, 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_jxx(s, JCC_JNE, label_next); |
| tcg_out_brcond(s, TCG_COND_GTU, 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_jxx(s, JCC_JNE, label_next); |
| tcg_out_brcond(s, TCG_COND_GEU, 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_jxx(s, JCC_JNE, 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_jxx(s, JCC_JNE, 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_jxx(s, JCC_JNE, 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_jxx(s, JCC_JNE, 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) |
| |
| #include "../../softmmu_defs.h" |
| |
| 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, 0xe9); /* jmp tb_ret_addr */ |
| tcg_out32(s, tb_ret_addr - s->code_ptr - 4); |
| 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 }, |
| }; |
| |
| static int tcg_target_callee_save_regs[] = { |
| /* TCG_REG_EBP, */ /* currently used for the global env, so no |
| need to save */ |
| TCG_REG_EBX, |
| TCG_REG_ESI, |
| TCG_REG_EDI, |
| }; |
| |
| static inline void tcg_out_push(TCGContext *s, int reg) |
| { |
| tcg_out_opc(s, 0x50 + reg); |
| } |
| |
| static inline void tcg_out_pop(TCGContext *s, int reg) |
| { |
| tcg_out_opc(s, 0x58 + reg); |
| } |
| |
| /* Generate global QEMU prologue and epilogue code */ |
| void tcg_target_qemu_prologue(TCGContext *s) |
| { |
| int i, frame_size, push_size, stack_addend; |
| |
| /* TB prologue */ |
| /* save all callee saved registers */ |
| for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { |
| tcg_out_push(s, tcg_target_callee_save_regs[i]); |
| } |
| /* reserve some stack space */ |
| push_size = 4 + ARRAY_SIZE(tcg_target_callee_save_regs) * 4; |
| frame_size = push_size + TCG_STATIC_CALL_ARGS_SIZE; |
| frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) & |
| ~(TCG_TARGET_STACK_ALIGN - 1); |
| stack_addend = frame_size - push_size; |
| tcg_out_addi(s, TCG_REG_ESP, -stack_addend); |
| |
| tcg_out_modrm(s, 0xff, 4, TCG_REG_EAX); /* jmp *%eax */ |
| |
| /* TB epilogue */ |
| tb_ret_addr = s->code_ptr; |
| tcg_out_addi(s, TCG_REG_ESP, stack_addend); |
| for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) { |
| tcg_out_pop(s, tcg_target_callee_save_regs[i]); |
| } |
| tcg_out8(s, 0xc3); /* ret */ |
| } |
| |
| 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); |
| } |
