diff options
Diffstat (limited to 'tcg/i386/tcg-target.c')
| -rw-r--r-- | tcg/i386/tcg-target.c | 1185 |
1 files changed, 1185 insertions, 0 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c new file mode 100644 index 0000000..08bb783 --- /dev/null +++ b/tcg/i386/tcg-target.c @@ -0,0 +1,1185 @@ +/* + * 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); +} |