1244 lines
35 KiB
C
1244 lines
35 KiB
C
/*
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* Tiny Code Generator for QEMU
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*
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* Copyright (c) 2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef NDEBUG
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static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
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"%eax",
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"%ecx",
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"%edx",
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"%ebx",
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"%esp",
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"%ebp",
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"%esi",
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"%edi",
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};
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#endif
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static const int tcg_target_reg_alloc_order[] = {
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TCG_REG_EAX,
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TCG_REG_EDX,
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TCG_REG_ECX,
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TCG_REG_EBX,
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TCG_REG_ESI,
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TCG_REG_EDI,
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TCG_REG_EBP,
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};
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static const int tcg_target_call_iarg_regs[3] = { TCG_REG_EAX, TCG_REG_EDX, TCG_REG_ECX };
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static const int tcg_target_call_oarg_regs[2] = { TCG_REG_EAX, TCG_REG_EDX };
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static uint8_t *tb_ret_addr;
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static void patch_reloc(uint8_t *code_ptr, int type,
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tcg_target_long value, tcg_target_long addend)
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{
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value += addend;
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switch(type) {
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case R_386_32:
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*(uint32_t *)code_ptr = value;
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break;
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case R_386_PC32:
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*(uint32_t *)code_ptr = value - (long)code_ptr;
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break;
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default:
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tcg_abort();
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}
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}
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/* maximum number of register used for input function arguments */
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static inline int tcg_target_get_call_iarg_regs_count(int flags)
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{
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flags &= TCG_CALL_TYPE_MASK;
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switch(flags) {
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case TCG_CALL_TYPE_STD:
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return 0;
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case TCG_CALL_TYPE_REGPARM_1:
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case TCG_CALL_TYPE_REGPARM_2:
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case TCG_CALL_TYPE_REGPARM:
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return flags - TCG_CALL_TYPE_REGPARM_1 + 1;
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default:
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tcg_abort();
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}
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}
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/* parse target specific constraints */
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static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
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{
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const char *ct_str;
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ct_str = *pct_str;
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switch(ct_str[0]) {
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case 'a':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set_reg(ct->u.regs, TCG_REG_EAX);
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break;
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case 'b':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set_reg(ct->u.regs, TCG_REG_EBX);
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break;
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case 'c':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set_reg(ct->u.regs, TCG_REG_ECX);
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break;
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case 'd':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set_reg(ct->u.regs, TCG_REG_EDX);
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break;
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case 'S':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set_reg(ct->u.regs, TCG_REG_ESI);
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break;
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case 'D':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set_reg(ct->u.regs, TCG_REG_EDI);
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break;
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case 'q':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set32(ct->u.regs, 0, 0xf);
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break;
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case 'r':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set32(ct->u.regs, 0, 0xff);
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break;
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/* qemu_ld/st address constraint */
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case 'L':
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ct->ct |= TCG_CT_REG;
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tcg_regset_set32(ct->u.regs, 0, 0xff);
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tcg_regset_reset_reg(ct->u.regs, TCG_REG_EAX);
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tcg_regset_reset_reg(ct->u.regs, TCG_REG_EDX);
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break;
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default:
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return -1;
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}
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ct_str++;
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*pct_str = ct_str;
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return 0;
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}
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/* test if a constant matches the constraint */
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static inline int tcg_target_const_match(tcg_target_long val,
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const TCGArgConstraint *arg_ct)
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{
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int ct;
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ct = arg_ct->ct;
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if (ct & TCG_CT_CONST)
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return 1;
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else
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return 0;
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}
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#define ARITH_ADD 0
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#define ARITH_OR 1
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#define ARITH_ADC 2
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#define ARITH_SBB 3
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#define ARITH_AND 4
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#define ARITH_SUB 5
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#define ARITH_XOR 6
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#define ARITH_CMP 7
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#define SHIFT_ROL 0
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#define SHIFT_ROR 1
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#define SHIFT_SHL 4
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#define SHIFT_SHR 5
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#define SHIFT_SAR 7
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#define JCC_JMP (-1)
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#define JCC_JO 0x0
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#define JCC_JNO 0x1
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#define JCC_JB 0x2
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#define JCC_JAE 0x3
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#define JCC_JE 0x4
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#define JCC_JNE 0x5
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#define JCC_JBE 0x6
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#define JCC_JA 0x7
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#define JCC_JS 0x8
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#define JCC_JNS 0x9
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#define JCC_JP 0xa
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#define JCC_JNP 0xb
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#define JCC_JL 0xc
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#define JCC_JGE 0xd
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#define JCC_JLE 0xe
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#define JCC_JG 0xf
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#define P_EXT 0x100 /* 0x0f opcode prefix */
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static const uint8_t tcg_cond_to_jcc[10] = {
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[TCG_COND_EQ] = JCC_JE,
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[TCG_COND_NE] = JCC_JNE,
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[TCG_COND_LT] = JCC_JL,
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[TCG_COND_GE] = JCC_JGE,
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[TCG_COND_LE] = JCC_JLE,
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[TCG_COND_GT] = JCC_JG,
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[TCG_COND_LTU] = JCC_JB,
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[TCG_COND_GEU] = JCC_JAE,
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[TCG_COND_LEU] = JCC_JBE,
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[TCG_COND_GTU] = JCC_JA,
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};
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static inline void tcg_out_opc(TCGContext *s, int opc)
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{
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if (opc & P_EXT)
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tcg_out8(s, 0x0f);
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tcg_out8(s, opc);
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}
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static inline void tcg_out_modrm(TCGContext *s, int opc, int r, int rm)
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{
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tcg_out_opc(s, opc);
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tcg_out8(s, 0xc0 | (r << 3) | rm);
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}
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/* rm == -1 means no register index */
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static inline void tcg_out_modrm_offset(TCGContext *s, int opc, int r, int rm,
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int32_t offset)
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{
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tcg_out_opc(s, opc);
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if (rm == -1) {
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tcg_out8(s, 0x05 | (r << 3));
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tcg_out32(s, offset);
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} else if (offset == 0 && rm != TCG_REG_EBP) {
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if (rm == TCG_REG_ESP) {
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tcg_out8(s, 0x04 | (r << 3));
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tcg_out8(s, 0x24);
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} else {
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tcg_out8(s, 0x00 | (r << 3) | rm);
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}
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} else if ((int8_t)offset == offset) {
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if (rm == TCG_REG_ESP) {
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tcg_out8(s, 0x44 | (r << 3));
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tcg_out8(s, 0x24);
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} else {
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tcg_out8(s, 0x40 | (r << 3) | rm);
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}
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tcg_out8(s, offset);
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} else {
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if (rm == TCG_REG_ESP) {
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tcg_out8(s, 0x84 | (r << 3));
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tcg_out8(s, 0x24);
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} else {
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tcg_out8(s, 0x80 | (r << 3) | rm);
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}
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tcg_out32(s, offset);
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}
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}
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static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
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{
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if (arg != ret)
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tcg_out_modrm(s, 0x8b, ret, arg);
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}
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static inline void tcg_out_movi(TCGContext *s, TCGType type,
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int ret, int32_t arg)
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{
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if (arg == 0) {
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/* xor r0,r0 */
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tcg_out_modrm(s, 0x01 | (ARITH_XOR << 3), ret, ret);
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} else {
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tcg_out8(s, 0xb8 + ret);
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tcg_out32(s, arg);
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}
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}
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static inline void tcg_out_ld(TCGContext *s, TCGType type, int ret,
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int arg1, tcg_target_long arg2)
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{
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/* movl */
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tcg_out_modrm_offset(s, 0x8b, ret, arg1, arg2);
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}
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static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
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int arg1, tcg_target_long arg2)
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{
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/* movl */
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tcg_out_modrm_offset(s, 0x89, arg, arg1, arg2);
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}
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static inline void tgen_arithi(TCGContext *s, int c, int r0, int32_t val)
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{
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if (val == (int8_t)val) {
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tcg_out_modrm(s, 0x83, c, r0);
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tcg_out8(s, val);
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} else {
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tcg_out_modrm(s, 0x81, c, r0);
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tcg_out32(s, val);
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}
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}
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static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
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{
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if (val != 0)
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tgen_arithi(s, ARITH_ADD, reg, val);
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}
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static void tcg_out_jxx(TCGContext *s, int opc, int label_index)
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{
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int32_t val, val1;
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TCGLabel *l = &s->labels[label_index];
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if (l->has_value) {
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val = l->u.value - (tcg_target_long)s->code_ptr;
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val1 = val - 2;
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if ((int8_t)val1 == val1) {
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if (opc == -1)
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tcg_out8(s, 0xeb);
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else
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tcg_out8(s, 0x70 + opc);
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tcg_out8(s, val1);
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} else {
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if (opc == -1) {
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tcg_out8(s, 0xe9);
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tcg_out32(s, val - 5);
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} else {
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tcg_out8(s, 0x0f);
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tcg_out8(s, 0x80 + opc);
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tcg_out32(s, val - 6);
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}
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}
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} else {
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if (opc == -1) {
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tcg_out8(s, 0xe9);
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} else {
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tcg_out8(s, 0x0f);
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tcg_out8(s, 0x80 + opc);
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}
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tcg_out_reloc(s, s->code_ptr, R_386_PC32, label_index, -4);
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s->code_ptr += 4;
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}
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}
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static void tcg_out_brcond(TCGContext *s, int cond,
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TCGArg arg1, TCGArg arg2, int const_arg2,
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int label_index)
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{
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if (const_arg2) {
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if (arg2 == 0) {
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/* test r, r */
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tcg_out_modrm(s, 0x85, arg1, arg1);
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} else {
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tgen_arithi(s, ARITH_CMP, arg1, arg2);
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}
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} else {
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tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3), arg2, arg1);
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}
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tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
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}
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/* XXX: we implement it at the target level to avoid having to
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handle cross basic blocks temporaries */
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static void tcg_out_brcond2(TCGContext *s,
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const TCGArg *args, const int *const_args)
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{
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int label_next;
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label_next = gen_new_label();
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switch(args[4]) {
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case TCG_COND_EQ:
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tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], label_next);
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tcg_out_brcond(s, TCG_COND_EQ, args[1], args[3], const_args[3], args[5]);
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break;
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case TCG_COND_NE:
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tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], args[5]);
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tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], args[5]);
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break;
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case TCG_COND_LT:
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tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_LE:
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tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GT:
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tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GE:
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tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_LTU:
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tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_LEU:
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tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GTU:
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tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], args[5]);
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break;
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case TCG_COND_GEU:
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tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]);
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tcg_out_jxx(s, JCC_JNE, label_next);
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tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], args[5]);
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break;
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default:
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tcg_abort();
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}
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tcg_out_label(s, label_next, (tcg_target_long)s->code_ptr);
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}
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#if defined(CONFIG_SOFTMMU)
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#include "../../softmmu_defs.h"
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static void *qemu_ld_helpers[4] = {
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__ldb_mmu,
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__ldw_mmu,
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__ldl_mmu,
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__ldq_mmu,
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};
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static void *qemu_st_helpers[4] = {
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__stb_mmu,
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__stw_mmu,
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__stl_mmu,
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__stq_mmu,
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};
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#endif
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#ifndef CONFIG_USER_ONLY
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#define GUEST_BASE 0
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#endif
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/* XXX: qemu_ld and qemu_st could be modified to clobber only EDX and
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EAX. It will be useful once fixed registers globals are less
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common. */
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static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
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int opc)
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{
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int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap;
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#if defined(CONFIG_SOFTMMU)
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uint8_t *label1_ptr, *label2_ptr;
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#endif
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#if TARGET_LONG_BITS == 64
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#if defined(CONFIG_SOFTMMU)
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uint8_t *label3_ptr;
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#endif
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int addr_reg2;
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#endif
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data_reg = *args++;
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if (opc == 3)
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data_reg2 = *args++;
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else
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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:
|
|
/* movzbl */
|
|
tcg_out_modrm(s, 0xb6 | P_EXT, data_reg, TCG_REG_EAX);
|
|
break;
|
|
case 1:
|
|
/* movzwl */
|
|
tcg_out_modrm(s, 0xb7 | P_EXT, data_reg, TCG_REG_EAX);
|
|
break;
|
|
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, GUEST_BASE);
|
|
break;
|
|
case 0 | 4:
|
|
/* movsbl */
|
|
tcg_out_modrm_offset(s, 0xbe | P_EXT, data_reg, r0, GUEST_BASE);
|
|
break;
|
|
case 1:
|
|
/* movzwl */
|
|
tcg_out_modrm_offset(s, 0xb7 | P_EXT, data_reg, r0, GUEST_BASE);
|
|
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, GUEST_BASE);
|
|
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, GUEST_BASE);
|
|
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, GUEST_BASE);
|
|
tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, GUEST_BASE + 4);
|
|
} else {
|
|
tcg_out_modrm_offset(s, 0x8b, data_reg, r0, GUEST_BASE + 4);
|
|
tcg_out_opc(s, (0xc8 + data_reg) | P_EXT);
|
|
|
|
tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, GUEST_BASE);
|
|
/* 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, GUEST_BASE);
|
|
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, GUEST_BASE);
|
|
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, GUEST_BASE);
|
|
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, GUEST_BASE);
|
|
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, GUEST_BASE + 4);
|
|
} else {
|
|
tcg_out_modrm_offset(s, 0x89, data_reg, r0, GUEST_BASE);
|
|
tcg_out_modrm_offset(s, 0x89, data_reg2, r0, GUEST_BASE + 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_rotl_i32:
|
|
c = SHIFT_ROL;
|
|
goto gen_shift32;
|
|
case INDEX_op_rotr_i32:
|
|
c = SHIFT_ROR;
|
|
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_bswap16_i32:
|
|
tcg_out8(s, 0x66);
|
|
tcg_out_modrm(s, 0xc1, SHIFT_ROL, args[0]);
|
|
tcg_out8(s, 8);
|
|
break;
|
|
case INDEX_op_bswap32_i32:
|
|
tcg_out_opc(s, (0xc8 + args[0]) | P_EXT);
|
|
break;
|
|
|
|
case INDEX_op_neg_i32:
|
|
tcg_out_modrm(s, 0xf7, 3, args[0]);
|
|
break;
|
|
|
|
case INDEX_op_not_i32:
|
|
tcg_out_modrm(s, 0xf7, 2, args[0]);
|
|
break;
|
|
|
|
case INDEX_op_ext8s_i32:
|
|
tcg_out_modrm(s, 0xbe | P_EXT, args[0], args[1]);
|
|
break;
|
|
case INDEX_op_ext16s_i32:
|
|
tcg_out_modrm(s, 0xbf | P_EXT, args[0], args[1]);
|
|
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_sar_i32, { "r", "0", "ci" } },
|
|
{ INDEX_op_rotl_i32, { "r", "0", "ci" } },
|
|
{ INDEX_op_rotr_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" } },
|
|
|
|
{ INDEX_op_bswap16_i32, { "r", "0" } },
|
|
{ INDEX_op_bswap32_i32, { "r", "0" } },
|
|
|
|
{ INDEX_op_neg_i32, { "r", "0" } },
|
|
|
|
{ INDEX_op_not_i32, { "r", "0" } },
|
|
|
|
{ INDEX_op_ext8s_i32, { "r", "q" } },
|
|
{ INDEX_op_ext16s_i32, { "r", "r" } },
|
|
|
|
#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);
|
|
}
|