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