root / tcg / i386 / tcg-target.c @ 96b4cf38
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/*
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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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|
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static const int tcg_target_reg_alloc_order[] = { |
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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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TCG_REG_ECX, |
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TCG_REG_EDX, |
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TCG_REG_EAX, |
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}; |
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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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|
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static uint8_t *tb_ret_addr;
|
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|
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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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case R_386_PC8:
|
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value -= (long)code_ptr;
|
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if (value != (int8_t)value) {
|
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tcg_abort(); |
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} |
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*(uint8_t *)code_ptr = value; |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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#define P_EXT 0x100 /* 0x0f opcode prefix */ |
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#define P_DATA16 0x200 /* 0x66 opcode prefix */ |
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|
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#define OPC_ARITH_EvIz (0x81) |
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#define OPC_ARITH_EvIb (0x83) |
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#define OPC_ARITH_GvEv (0x03) /* ... plus (ARITH_FOO << 3) */ |
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#define OPC_ADD_GvEv (OPC_ARITH_GvEv | (ARITH_ADD << 3)) |
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#define OPC_BSWAP (0xc8 | P_EXT) |
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#define OPC_CALL_Jz (0xe8) |
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#define OPC_CMP_GvEv (OPC_ARITH_GvEv | (ARITH_CMP << 3)) |
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#define OPC_DEC_r32 (0x48) |
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#define OPC_IMUL_GvEv (0xaf | P_EXT) |
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#define OPC_IMUL_GvEvIb (0x6b) |
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#define OPC_IMUL_GvEvIz (0x69) |
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#define OPC_INC_r32 (0x40) |
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#define OPC_JCC_long (0x80 | P_EXT) /* ... plus condition code */ |
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#define OPC_JCC_short (0x70) /* ... plus condition code */ |
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#define OPC_JMP_long (0xe9) |
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#define OPC_JMP_short (0xeb) |
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#define OPC_LEA (0x8d) |
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#define OPC_MOVB_EvGv (0x88) /* stores, more or less */ |
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#define OPC_MOVL_EvGv (0x89) /* stores, more or less */ |
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#define OPC_MOVL_GvEv (0x8b) /* loads, more or less */ |
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#define OPC_MOVL_Iv (0xb8) |
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#define OPC_MOVSBL (0xbe | P_EXT) |
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#define OPC_MOVSWL (0xbf | P_EXT) |
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#define OPC_MOVZBL (0xb6 | P_EXT) |
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#define OPC_MOVZWL (0xb7 | P_EXT) |
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#define OPC_POP_r32 (0x58) |
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#define OPC_PUSH_r32 (0x50) |
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#define OPC_PUSH_Iv (0x68) |
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#define OPC_PUSH_Ib (0x6a) |
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#define OPC_RET (0xc3) |
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#define OPC_SETCC (0x90 | P_EXT) /* ... plus condition code */ |
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#define OPC_SHIFT_1 (0xd1) |
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#define OPC_SHIFT_Ib (0xc1) |
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#define OPC_SHIFT_cl (0xd3) |
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#define OPC_TESTL (0x85) |
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#define OPC_XCHG_ax_r32 (0x90) |
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|
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#define OPC_GRP3_Ev (0xf7) |
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#define OPC_GRP5 (0xff) |
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|
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/* Group 1 opcode extensions for 0x80-0x83.
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These are also used as modifiers for OPC_ARITH. */
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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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|
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/* Group 2 opcode extensions for 0xc0, 0xc1, 0xd0-0xd3. */
|
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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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|
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/* Group 3 opcode extensions for 0xf6, 0xf7. To be used with OPC_GRP3. */
|
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#define EXT3_NOT 2 |
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#define EXT3_NEG 3 |
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#define EXT3_MUL 4 |
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#define EXT3_IMUL 5 |
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#define EXT3_DIV 6 |
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#define EXT3_IDIV 7 |
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|
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/* Group 5 opcode extensions for 0xff. To be used with OPC_GRP5. */
|
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#define EXT5_CALLN_Ev 2 |
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#define EXT5_JMPN_Ev 4 |
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|
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/* Condition codes to be added to OPC_JCC_{long,short}. */
|
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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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|
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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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|
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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_DATA16) {
|
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tcg_out8(s, 0x66);
|
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} |
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if (opc & P_EXT) {
|
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tcg_out8(s, 0x0f);
|
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} |
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tcg_out8(s, opc); |
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} |
| 274 |
|
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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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} |
| 280 |
|
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/* Output an opcode with a full "rm + (index<<shift) + offset" address mode.
|
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We handle either RM and INDEX missing with a -1 value. */
|
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|
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static void tcg_out_modrm_sib_offset(TCGContext *s, int opc, int r, int rm, |
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int index, int shift, int32_t offset) |
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{
|
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int mod, len;
|
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|
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if (index == -1 && rm == -1) { |
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/* Absolute address. */
|
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tcg_out_opc(s, opc); |
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tcg_out8(s, (r << 3) | 5); |
| 293 |
tcg_out32(s, offset); |
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return;
|
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} |
| 296 |
|
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tcg_out_opc(s, opc); |
| 298 |
|
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/* Find the length of the immediate addend. Note that the encoding
|
| 300 |
that would be used for (%ebp) indicates absolute addressing. */
|
| 301 |
if (rm == -1) { |
| 302 |
mod = 0, len = 4, rm = 5; |
| 303 |
} else if (offset == 0 && rm != TCG_REG_EBP) { |
| 304 |
mod = 0, len = 0; |
| 305 |
} else if (offset == (int8_t)offset) { |
| 306 |
mod = 0x40, len = 1; |
| 307 |
} else {
|
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mod = 0x80, len = 4; |
| 309 |
} |
| 310 |
|
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/* Use a single byte MODRM format if possible. Note that the encoding
|
| 312 |
that would be used for %esp is the escape to the two byte form. */
|
| 313 |
if (index == -1 && rm != TCG_REG_ESP) { |
| 314 |
/* Single byte MODRM format. */
|
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tcg_out8(s, mod | (r << 3) | rm);
|
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} else {
|
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/* Two byte MODRM+SIB format. */
|
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|
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/* Note that the encoding that would place %esp into the index
|
| 320 |
field indicates no index register. */
|
| 321 |
if (index == -1) { |
| 322 |
index = 4;
|
| 323 |
} else {
|
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assert(index != TCG_REG_ESP); |
| 325 |
} |
| 326 |
|
| 327 |
tcg_out8(s, mod | (r << 3) | 4); |
| 328 |
tcg_out8(s, (shift << 6) | (index << 3) | rm); |
| 329 |
} |
| 330 |
|
| 331 |
if (len == 1) { |
| 332 |
tcg_out8(s, offset); |
| 333 |
} else if (len == 4) { |
| 334 |
tcg_out32(s, offset); |
| 335 |
} |
| 336 |
} |
| 337 |
|
| 338 |
/* rm == -1 means no register index */
|
| 339 |
static inline void tcg_out_modrm_offset(TCGContext *s, int opc, int r, int rm, |
| 340 |
int32_t offset) |
| 341 |
{
|
| 342 |
tcg_out_modrm_sib_offset(s, opc, r, rm, -1, 0, offset); |
| 343 |
} |
| 344 |
|
| 345 |
/* Generate dest op= src. Uses the same ARITH_* codes as tgen_arithi. */
|
| 346 |
static inline void tgen_arithr(TCGContext *s, int subop, int dest, int src) |
| 347 |
{
|
| 348 |
tcg_out_modrm(s, OPC_ARITH_GvEv + (subop << 3), dest, src);
|
| 349 |
} |
| 350 |
|
| 351 |
static inline void tcg_out_mov(TCGContext *s, int ret, int arg) |
| 352 |
{
|
| 353 |
if (arg != ret) {
|
| 354 |
tcg_out_modrm(s, OPC_MOVL_GvEv, ret, arg); |
| 355 |
} |
| 356 |
} |
| 357 |
|
| 358 |
static inline void tcg_out_movi(TCGContext *s, TCGType type, |
| 359 |
int ret, int32_t arg)
|
| 360 |
{
|
| 361 |
if (arg == 0) { |
| 362 |
tgen_arithr(s, ARITH_XOR, ret, ret); |
| 363 |
} else {
|
| 364 |
tcg_out8(s, OPC_MOVL_Iv + ret); |
| 365 |
tcg_out32(s, arg); |
| 366 |
} |
| 367 |
} |
| 368 |
|
| 369 |
static inline void tcg_out_pushi(TCGContext *s, tcg_target_long val) |
| 370 |
{
|
| 371 |
if (val == (int8_t)val) {
|
| 372 |
tcg_out_opc(s, OPC_PUSH_Ib); |
| 373 |
tcg_out8(s, val); |
| 374 |
} else {
|
| 375 |
tcg_out_opc(s, OPC_PUSH_Iv); |
| 376 |
tcg_out32(s, val); |
| 377 |
} |
| 378 |
} |
| 379 |
|
| 380 |
static inline void tcg_out_push(TCGContext *s, int reg) |
| 381 |
{
|
| 382 |
tcg_out_opc(s, OPC_PUSH_r32 + reg); |
| 383 |
} |
| 384 |
|
| 385 |
static inline void tcg_out_pop(TCGContext *s, int reg) |
| 386 |
{
|
| 387 |
tcg_out_opc(s, OPC_POP_r32 + reg); |
| 388 |
} |
| 389 |
|
| 390 |
static inline void tcg_out_ld(TCGContext *s, TCGType type, int ret, |
| 391 |
int arg1, tcg_target_long arg2)
|
| 392 |
{
|
| 393 |
tcg_out_modrm_offset(s, OPC_MOVL_GvEv, ret, arg1, arg2); |
| 394 |
} |
| 395 |
|
| 396 |
static inline void tcg_out_st(TCGContext *s, TCGType type, int arg, |
| 397 |
int arg1, tcg_target_long arg2)
|
| 398 |
{
|
| 399 |
tcg_out_modrm_offset(s, OPC_MOVL_EvGv, arg, arg1, arg2); |
| 400 |
} |
| 401 |
|
| 402 |
static void tcg_out_shifti(TCGContext *s, int subopc, int reg, int count) |
| 403 |
{
|
| 404 |
/* Propagate an opcode prefix, such as P_DATA16. */
|
| 405 |
int ext = subopc & ~0x7; |
| 406 |
subopc &= 0x7;
|
| 407 |
|
| 408 |
if (count == 1) { |
| 409 |
tcg_out_modrm(s, OPC_SHIFT_1 | ext, subopc, reg); |
| 410 |
} else {
|
| 411 |
tcg_out_modrm(s, OPC_SHIFT_Ib | ext, subopc, reg); |
| 412 |
tcg_out8(s, count); |
| 413 |
} |
| 414 |
} |
| 415 |
|
| 416 |
static inline void tcg_out_bswap32(TCGContext *s, int reg) |
| 417 |
{
|
| 418 |
tcg_out_opc(s, OPC_BSWAP + reg); |
| 419 |
} |
| 420 |
|
| 421 |
static inline void tcg_out_rolw_8(TCGContext *s, int reg) |
| 422 |
{
|
| 423 |
tcg_out_shifti(s, SHIFT_ROL | P_DATA16, reg, 8);
|
| 424 |
} |
| 425 |
|
| 426 |
static inline void tcg_out_ext8u(TCGContext *s, int dest, int src) |
| 427 |
{
|
| 428 |
/* movzbl */
|
| 429 |
assert(src < 4);
|
| 430 |
tcg_out_modrm(s, OPC_MOVZBL, dest, src); |
| 431 |
} |
| 432 |
|
| 433 |
static void tcg_out_ext8s(TCGContext *s, int dest, int src) |
| 434 |
{
|
| 435 |
/* movsbl */
|
| 436 |
assert(src < 4);
|
| 437 |
tcg_out_modrm(s, OPC_MOVSBL, dest, src); |
| 438 |
} |
| 439 |
|
| 440 |
static inline void tcg_out_ext16u(TCGContext *s, int dest, int src) |
| 441 |
{
|
| 442 |
/* movzwl */
|
| 443 |
tcg_out_modrm(s, OPC_MOVZWL, dest, src); |
| 444 |
} |
| 445 |
|
| 446 |
static inline void tcg_out_ext16s(TCGContext *s, int dest, int src) |
| 447 |
{
|
| 448 |
/* movswl */
|
| 449 |
tcg_out_modrm(s, OPC_MOVSWL, dest, src); |
| 450 |
} |
| 451 |
|
| 452 |
static inline void tgen_arithi(TCGContext *s, int c, int r0, |
| 453 |
int32_t val, int cf)
|
| 454 |
{
|
| 455 |
/* ??? While INC is 2 bytes shorter than ADDL $1, they also induce
|
| 456 |
partial flags update stalls on Pentium4 and are not recommended
|
| 457 |
by current Intel optimization manuals. */
|
| 458 |
if (!cf && (c == ARITH_ADD || c == ARITH_SUB) && (val == 1 || val == -1)) { |
| 459 |
int opc = ((c == ARITH_ADD) ^ (val < 0) ? OPC_INC_r32 : OPC_DEC_r32); |
| 460 |
tcg_out_opc(s, opc + r0); |
| 461 |
} else if (val == (int8_t)val) { |
| 462 |
tcg_out_modrm(s, OPC_ARITH_EvIb, c, r0); |
| 463 |
tcg_out8(s, val); |
| 464 |
} else if (c == ARITH_AND && val == 0xffu && r0 < 4) { |
| 465 |
tcg_out_ext8u(s, r0, r0); |
| 466 |
} else if (c == ARITH_AND && val == 0xffffu) { |
| 467 |
tcg_out_ext16u(s, r0, r0); |
| 468 |
} else {
|
| 469 |
tcg_out_modrm(s, OPC_ARITH_EvIz, c, r0); |
| 470 |
tcg_out32(s, val); |
| 471 |
} |
| 472 |
} |
| 473 |
|
| 474 |
static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val) |
| 475 |
{
|
| 476 |
if (val != 0) |
| 477 |
tgen_arithi(s, ARITH_ADD, reg, val, 0);
|
| 478 |
} |
| 479 |
|
| 480 |
/* Use SMALL != 0 to force a short forward branch. */
|
| 481 |
static void tcg_out_jxx(TCGContext *s, int opc, int label_index, int small) |
| 482 |
{
|
| 483 |
int32_t val, val1; |
| 484 |
TCGLabel *l = &s->labels[label_index]; |
| 485 |
|
| 486 |
if (l->has_value) {
|
| 487 |
val = l->u.value - (tcg_target_long)s->code_ptr; |
| 488 |
val1 = val - 2;
|
| 489 |
if ((int8_t)val1 == val1) {
|
| 490 |
if (opc == -1) { |
| 491 |
tcg_out8(s, OPC_JMP_short); |
| 492 |
} else {
|
| 493 |
tcg_out8(s, OPC_JCC_short + opc); |
| 494 |
} |
| 495 |
tcg_out8(s, val1); |
| 496 |
} else {
|
| 497 |
if (small) {
|
| 498 |
tcg_abort(); |
| 499 |
} |
| 500 |
if (opc == -1) { |
| 501 |
tcg_out8(s, OPC_JMP_long); |
| 502 |
tcg_out32(s, val - 5);
|
| 503 |
} else {
|
| 504 |
tcg_out_opc(s, OPC_JCC_long + opc); |
| 505 |
tcg_out32(s, val - 6);
|
| 506 |
} |
| 507 |
} |
| 508 |
} else if (small) { |
| 509 |
if (opc == -1) { |
| 510 |
tcg_out8(s, OPC_JMP_short); |
| 511 |
} else {
|
| 512 |
tcg_out8(s, OPC_JCC_short + opc); |
| 513 |
} |
| 514 |
tcg_out_reloc(s, s->code_ptr, R_386_PC8, label_index, -1);
|
| 515 |
s->code_ptr += 1;
|
| 516 |
} else {
|
| 517 |
if (opc == -1) { |
| 518 |
tcg_out8(s, OPC_JMP_long); |
| 519 |
} else {
|
| 520 |
tcg_out_opc(s, OPC_JCC_long + opc); |
| 521 |
} |
| 522 |
tcg_out_reloc(s, s->code_ptr, R_386_PC32, label_index, -4);
|
| 523 |
s->code_ptr += 4;
|
| 524 |
} |
| 525 |
} |
| 526 |
|
| 527 |
static void tcg_out_cmp(TCGContext *s, TCGArg arg1, TCGArg arg2, |
| 528 |
int const_arg2)
|
| 529 |
{
|
| 530 |
if (const_arg2) {
|
| 531 |
if (arg2 == 0) { |
| 532 |
/* test r, r */
|
| 533 |
tcg_out_modrm(s, OPC_TESTL, arg1, arg1); |
| 534 |
} else {
|
| 535 |
tgen_arithi(s, ARITH_CMP, arg1, arg2, 0);
|
| 536 |
} |
| 537 |
} else {
|
| 538 |
tgen_arithr(s, ARITH_CMP, arg1, arg2); |
| 539 |
} |
| 540 |
} |
| 541 |
|
| 542 |
static void tcg_out_brcond(TCGContext *s, TCGCond cond, |
| 543 |
TCGArg arg1, TCGArg arg2, int const_arg2,
|
| 544 |
int label_index, int small) |
| 545 |
{
|
| 546 |
tcg_out_cmp(s, arg1, arg2, const_arg2); |
| 547 |
tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index, small); |
| 548 |
} |
| 549 |
|
| 550 |
/* XXX: we implement it at the target level to avoid having to
|
| 551 |
handle cross basic blocks temporaries */
|
| 552 |
static void tcg_out_brcond2(TCGContext *s, const TCGArg *args, |
| 553 |
const int *const_args, int small) |
| 554 |
{
|
| 555 |
int label_next;
|
| 556 |
label_next = gen_new_label(); |
| 557 |
switch(args[4]) { |
| 558 |
case TCG_COND_EQ:
|
| 559 |
tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], |
| 560 |
label_next, 1);
|
| 561 |
tcg_out_brcond(s, TCG_COND_EQ, args[1], args[3], const_args[3], |
| 562 |
args[5], small);
|
| 563 |
break;
|
| 564 |
case TCG_COND_NE:
|
| 565 |
tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], |
| 566 |
args[5], small);
|
| 567 |
tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], |
| 568 |
args[5], small);
|
| 569 |
break;
|
| 570 |
case TCG_COND_LT:
|
| 571 |
tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], |
| 572 |
args[5], small);
|
| 573 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 574 |
tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], |
| 575 |
args[5], small);
|
| 576 |
break;
|
| 577 |
case TCG_COND_LE:
|
| 578 |
tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], |
| 579 |
args[5], small);
|
| 580 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 581 |
tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], |
| 582 |
args[5], small);
|
| 583 |
break;
|
| 584 |
case TCG_COND_GT:
|
| 585 |
tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], |
| 586 |
args[5], small);
|
| 587 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 588 |
tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], |
| 589 |
args[5], small);
|
| 590 |
break;
|
| 591 |
case TCG_COND_GE:
|
| 592 |
tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], |
| 593 |
args[5], small);
|
| 594 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 595 |
tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], |
| 596 |
args[5], small);
|
| 597 |
break;
|
| 598 |
case TCG_COND_LTU:
|
| 599 |
tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], |
| 600 |
args[5], small);
|
| 601 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 602 |
tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], |
| 603 |
args[5], small);
|
| 604 |
break;
|
| 605 |
case TCG_COND_LEU:
|
| 606 |
tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], |
| 607 |
args[5], small);
|
| 608 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 609 |
tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], |
| 610 |
args[5], small);
|
| 611 |
break;
|
| 612 |
case TCG_COND_GTU:
|
| 613 |
tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], |
| 614 |
args[5], small);
|
| 615 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 616 |
tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], |
| 617 |
args[5], small);
|
| 618 |
break;
|
| 619 |
case TCG_COND_GEU:
|
| 620 |
tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], |
| 621 |
args[5], small);
|
| 622 |
tcg_out_jxx(s, JCC_JNE, label_next, 1);
|
| 623 |
tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], |
| 624 |
args[5], small);
|
| 625 |
break;
|
| 626 |
default:
|
| 627 |
tcg_abort(); |
| 628 |
} |
| 629 |
tcg_out_label(s, label_next, (tcg_target_long)s->code_ptr); |
| 630 |
} |
| 631 |
|
| 632 |
static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGArg dest, |
| 633 |
TCGArg arg1, TCGArg arg2, int const_arg2)
|
| 634 |
{
|
| 635 |
tcg_out_cmp(s, arg1, arg2, const_arg2); |
| 636 |
tcg_out_modrm(s, OPC_SETCC | tcg_cond_to_jcc[cond], 0, dest);
|
| 637 |
tcg_out_ext8u(s, dest, dest); |
| 638 |
} |
| 639 |
|
| 640 |
static void tcg_out_setcond2(TCGContext *s, const TCGArg *args, |
| 641 |
const int *const_args) |
| 642 |
{
|
| 643 |
TCGArg new_args[6];
|
| 644 |
int label_true, label_over;
|
| 645 |
|
| 646 |
memcpy(new_args, args+1, 5*sizeof(TCGArg)); |
| 647 |
|
| 648 |
if (args[0] == args[1] || args[0] == args[2] |
| 649 |
|| (!const_args[3] && args[0] == args[3]) |
| 650 |
|| (!const_args[4] && args[0] == args[4])) { |
| 651 |
/* When the destination overlaps with one of the argument
|
| 652 |
registers, don't do anything tricky. */
|
| 653 |
label_true = gen_new_label(); |
| 654 |
label_over = gen_new_label(); |
| 655 |
|
| 656 |
new_args[5] = label_true;
|
| 657 |
tcg_out_brcond2(s, new_args, const_args+1, 1); |
| 658 |
|
| 659 |
tcg_out_movi(s, TCG_TYPE_I32, args[0], 0); |
| 660 |
tcg_out_jxx(s, JCC_JMP, label_over, 1);
|
| 661 |
tcg_out_label(s, label_true, (tcg_target_long)s->code_ptr); |
| 662 |
|
| 663 |
tcg_out_movi(s, TCG_TYPE_I32, args[0], 1); |
| 664 |
tcg_out_label(s, label_over, (tcg_target_long)s->code_ptr); |
| 665 |
} else {
|
| 666 |
/* When the destination does not overlap one of the arguments,
|
| 667 |
clear the destination first, jump if cond false, and emit an
|
| 668 |
increment in the true case. This results in smaller code. */
|
| 669 |
|
| 670 |
tcg_out_movi(s, TCG_TYPE_I32, args[0], 0); |
| 671 |
|
| 672 |
label_over = gen_new_label(); |
| 673 |
new_args[4] = tcg_invert_cond(new_args[4]); |
| 674 |
new_args[5] = label_over;
|
| 675 |
tcg_out_brcond2(s, new_args, const_args+1, 1); |
| 676 |
|
| 677 |
tgen_arithi(s, ARITH_ADD, args[0], 1, 0); |
| 678 |
tcg_out_label(s, label_over, (tcg_target_long)s->code_ptr); |
| 679 |
} |
| 680 |
} |
| 681 |
|
| 682 |
static void tcg_out_calli(TCGContext *s, tcg_target_long dest) |
| 683 |
{
|
| 684 |
tcg_out_opc(s, OPC_CALL_Jz); |
| 685 |
tcg_out32(s, dest - (tcg_target_long)s->code_ptr - 4);
|
| 686 |
} |
| 687 |
|
| 688 |
#if defined(CONFIG_SOFTMMU)
|
| 689 |
|
| 690 |
#include "../../softmmu_defs.h" |
| 691 |
|
| 692 |
static void *qemu_ld_helpers[4] = { |
| 693 |
__ldb_mmu, |
| 694 |
__ldw_mmu, |
| 695 |
__ldl_mmu, |
| 696 |
__ldq_mmu, |
| 697 |
}; |
| 698 |
|
| 699 |
static void *qemu_st_helpers[4] = { |
| 700 |
__stb_mmu, |
| 701 |
__stw_mmu, |
| 702 |
__stl_mmu, |
| 703 |
__stq_mmu, |
| 704 |
}; |
| 705 |
#endif
|
| 706 |
|
| 707 |
#ifndef CONFIG_USER_ONLY
|
| 708 |
#define GUEST_BASE 0 |
| 709 |
#endif
|
| 710 |
|
| 711 |
/* XXX: qemu_ld and qemu_st could be modified to clobber only EDX and
|
| 712 |
EAX. It will be useful once fixed registers globals are less
|
| 713 |
common. */
|
| 714 |
static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, |
| 715 |
int opc)
|
| 716 |
{
|
| 717 |
int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap;
|
| 718 |
#if defined(CONFIG_SOFTMMU)
|
| 719 |
uint8_t *label1_ptr, *label2_ptr; |
| 720 |
#endif
|
| 721 |
#if TARGET_LONG_BITS == 64 |
| 722 |
#if defined(CONFIG_SOFTMMU)
|
| 723 |
uint8_t *label3_ptr; |
| 724 |
#endif
|
| 725 |
int addr_reg2;
|
| 726 |
#endif
|
| 727 |
|
| 728 |
data_reg = *args++; |
| 729 |
if (opc == 3) |
| 730 |
data_reg2 = *args++; |
| 731 |
else
|
| 732 |
data_reg2 = 0;
|
| 733 |
addr_reg = *args++; |
| 734 |
#if TARGET_LONG_BITS == 64 |
| 735 |
addr_reg2 = *args++; |
| 736 |
#endif
|
| 737 |
mem_index = *args; |
| 738 |
s_bits = opc & 3;
|
| 739 |
|
| 740 |
r0 = TCG_REG_EAX; |
| 741 |
r1 = TCG_REG_EDX; |
| 742 |
|
| 743 |
#if defined(CONFIG_SOFTMMU)
|
| 744 |
tcg_out_mov(s, r1, addr_reg); |
| 745 |
tcg_out_mov(s, r0, addr_reg); |
| 746 |
|
| 747 |
tcg_out_shifti(s, SHIFT_SHR, r1, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); |
| 748 |
|
| 749 |
tgen_arithi(s, ARITH_AND, r0, TARGET_PAGE_MASK | ((1 << s_bits) - 1), 0); |
| 750 |
tgen_arithi(s, ARITH_AND, r1, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS, 0); |
| 751 |
|
| 752 |
tcg_out_modrm_sib_offset(s, OPC_LEA, r1, TCG_AREG0, r1, 0,
|
| 753 |
offsetof(CPUState, |
| 754 |
tlb_table[mem_index][0].addr_read));
|
| 755 |
|
| 756 |
/* cmp 0(r1), r0 */
|
| 757 |
tcg_out_modrm_offset(s, OPC_CMP_GvEv, r0, r1, 0);
|
| 758 |
|
| 759 |
tcg_out_mov(s, r0, addr_reg); |
| 760 |
|
| 761 |
#if TARGET_LONG_BITS == 32 |
| 762 |
/* je label1 */
|
| 763 |
tcg_out8(s, OPC_JCC_short + JCC_JE); |
| 764 |
label1_ptr = s->code_ptr; |
| 765 |
s->code_ptr++; |
| 766 |
#else
|
| 767 |
/* jne label3 */
|
| 768 |
tcg_out8(s, OPC_JCC_short + JCC_JNE); |
| 769 |
label3_ptr = s->code_ptr; |
| 770 |
s->code_ptr++; |
| 771 |
|
| 772 |
/* cmp 4(r1), addr_reg2 */
|
| 773 |
tcg_out_modrm_offset(s, OPC_CMP_GvEv, addr_reg2, r1, 4);
|
| 774 |
|
| 775 |
/* je label1 */
|
| 776 |
tcg_out8(s, OPC_JCC_short + JCC_JE); |
| 777 |
label1_ptr = s->code_ptr; |
| 778 |
s->code_ptr++; |
| 779 |
|
| 780 |
/* label3: */
|
| 781 |
*label3_ptr = s->code_ptr - label3_ptr - 1;
|
| 782 |
#endif
|
| 783 |
|
| 784 |
/* XXX: move that code at the end of the TB */
|
| 785 |
#if TARGET_LONG_BITS == 32 |
| 786 |
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_EDX, mem_index); |
| 787 |
#else
|
| 788 |
tcg_out_mov(s, TCG_REG_EDX, addr_reg2); |
| 789 |
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index); |
| 790 |
#endif
|
| 791 |
tcg_out_calli(s, (tcg_target_long)qemu_ld_helpers[s_bits]); |
| 792 |
|
| 793 |
switch(opc) {
|
| 794 |
case 0 | 4: |
| 795 |
tcg_out_ext8s(s, data_reg, TCG_REG_EAX); |
| 796 |
break;
|
| 797 |
case 1 | 4: |
| 798 |
tcg_out_ext16s(s, data_reg, TCG_REG_EAX); |
| 799 |
break;
|
| 800 |
case 0: |
| 801 |
tcg_out_ext8u(s, data_reg, TCG_REG_EAX); |
| 802 |
break;
|
| 803 |
case 1: |
| 804 |
tcg_out_ext16u(s, data_reg, TCG_REG_EAX); |
| 805 |
break;
|
| 806 |
case 2: |
| 807 |
default:
|
| 808 |
tcg_out_mov(s, data_reg, TCG_REG_EAX); |
| 809 |
break;
|
| 810 |
case 3: |
| 811 |
if (data_reg == TCG_REG_EDX) {
|
| 812 |
/* xchg %edx, %eax */
|
| 813 |
tcg_out_opc(s, OPC_XCHG_ax_r32 + TCG_REG_EDX); |
| 814 |
tcg_out_mov(s, data_reg2, TCG_REG_EAX); |
| 815 |
} else {
|
| 816 |
tcg_out_mov(s, data_reg, TCG_REG_EAX); |
| 817 |
tcg_out_mov(s, data_reg2, TCG_REG_EDX); |
| 818 |
} |
| 819 |
break;
|
| 820 |
} |
| 821 |
|
| 822 |
/* jmp label2 */
|
| 823 |
tcg_out8(s, OPC_JMP_short); |
| 824 |
label2_ptr = s->code_ptr; |
| 825 |
s->code_ptr++; |
| 826 |
|
| 827 |
/* label1: */
|
| 828 |
*label1_ptr = s->code_ptr - label1_ptr - 1;
|
| 829 |
|
| 830 |
/* add x(r1), r0 */
|
| 831 |
tcg_out_modrm_offset(s, OPC_ADD_GvEv, r0, r1, |
| 832 |
offsetof(CPUTLBEntry, addend) - |
| 833 |
offsetof(CPUTLBEntry, addr_read)); |
| 834 |
#else
|
| 835 |
r0 = addr_reg; |
| 836 |
#endif
|
| 837 |
|
| 838 |
#ifdef TARGET_WORDS_BIGENDIAN
|
| 839 |
bswap = 1;
|
| 840 |
#else
|
| 841 |
bswap = 0;
|
| 842 |
#endif
|
| 843 |
switch(opc) {
|
| 844 |
case 0: |
| 845 |
/* movzbl */
|
| 846 |
tcg_out_modrm_offset(s, OPC_MOVZBL, data_reg, r0, GUEST_BASE); |
| 847 |
break;
|
| 848 |
case 0 | 4: |
| 849 |
/* movsbl */
|
| 850 |
tcg_out_modrm_offset(s, OPC_MOVSBL, data_reg, r0, GUEST_BASE); |
| 851 |
break;
|
| 852 |
case 1: |
| 853 |
/* movzwl */
|
| 854 |
tcg_out_modrm_offset(s, OPC_MOVZWL, data_reg, r0, GUEST_BASE); |
| 855 |
if (bswap) {
|
| 856 |
tcg_out_rolw_8(s, data_reg); |
| 857 |
} |
| 858 |
break;
|
| 859 |
case 1 | 4: |
| 860 |
/* movswl */
|
| 861 |
tcg_out_modrm_offset(s, OPC_MOVSWL, data_reg, r0, GUEST_BASE); |
| 862 |
if (bswap) {
|
| 863 |
tcg_out_rolw_8(s, data_reg); |
| 864 |
|
| 865 |
/* movswl data_reg, data_reg */
|
| 866 |
tcg_out_modrm(s, OPC_MOVSWL, data_reg, data_reg); |
| 867 |
} |
| 868 |
break;
|
| 869 |
case 2: |
| 870 |
tcg_out_ld(s, TCG_TYPE_I32, data_reg, r0, GUEST_BASE); |
| 871 |
if (bswap) {
|
| 872 |
tcg_out_bswap32(s, data_reg); |
| 873 |
} |
| 874 |
break;
|
| 875 |
case 3: |
| 876 |
if (bswap) {
|
| 877 |
int t = data_reg;
|
| 878 |
data_reg = data_reg2; |
| 879 |
data_reg2 = t; |
| 880 |
} |
| 881 |
if (r0 != data_reg) {
|
| 882 |
tcg_out_ld(s, TCG_TYPE_I32, data_reg, r0, GUEST_BASE); |
| 883 |
tcg_out_ld(s, TCG_TYPE_I32, data_reg2, r0, GUEST_BASE + 4);
|
| 884 |
} else {
|
| 885 |
tcg_out_ld(s, TCG_TYPE_I32, data_reg2, r0, GUEST_BASE + 4);
|
| 886 |
tcg_out_ld(s, TCG_TYPE_I32, data_reg, r0, GUEST_BASE); |
| 887 |
} |
| 888 |
if (bswap) {
|
| 889 |
tcg_out_bswap32(s, data_reg); |
| 890 |
tcg_out_bswap32(s, data_reg2); |
| 891 |
} |
| 892 |
break;
|
| 893 |
default:
|
| 894 |
tcg_abort(); |
| 895 |
} |
| 896 |
|
| 897 |
#if defined(CONFIG_SOFTMMU)
|
| 898 |
/* label2: */
|
| 899 |
*label2_ptr = s->code_ptr - label2_ptr - 1;
|
| 900 |
#endif
|
| 901 |
} |
| 902 |
|
| 903 |
|
| 904 |
static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, |
| 905 |
int opc)
|
| 906 |
{
|
| 907 |
int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap;
|
| 908 |
#if defined(CONFIG_SOFTMMU)
|
| 909 |
int stack_adjust;
|
| 910 |
uint8_t *label1_ptr, *label2_ptr; |
| 911 |
#endif
|
| 912 |
#if TARGET_LONG_BITS == 64 |
| 913 |
#if defined(CONFIG_SOFTMMU)
|
| 914 |
uint8_t *label3_ptr; |
| 915 |
#endif
|
| 916 |
int addr_reg2;
|
| 917 |
#endif
|
| 918 |
|
| 919 |
data_reg = *args++; |
| 920 |
if (opc == 3) |
| 921 |
data_reg2 = *args++; |
| 922 |
else
|
| 923 |
data_reg2 = 0;
|
| 924 |
addr_reg = *args++; |
| 925 |
#if TARGET_LONG_BITS == 64 |
| 926 |
addr_reg2 = *args++; |
| 927 |
#endif
|
| 928 |
mem_index = *args; |
| 929 |
|
| 930 |
s_bits = opc; |
| 931 |
|
| 932 |
r0 = TCG_REG_EAX; |
| 933 |
r1 = TCG_REG_EDX; |
| 934 |
|
| 935 |
#if defined(CONFIG_SOFTMMU)
|
| 936 |
tcg_out_mov(s, r1, addr_reg); |
| 937 |
tcg_out_mov(s, r0, addr_reg); |
| 938 |
|
| 939 |
tcg_out_shifti(s, SHIFT_SHR, r1, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); |
| 940 |
|
| 941 |
tgen_arithi(s, ARITH_AND, r0, TARGET_PAGE_MASK | ((1 << s_bits) - 1), 0); |
| 942 |
tgen_arithi(s, ARITH_AND, r1, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS, 0); |
| 943 |
|
| 944 |
tcg_out_modrm_sib_offset(s, OPC_LEA, r1, TCG_AREG0, r1, 0,
|
| 945 |
offsetof(CPUState, |
| 946 |
tlb_table[mem_index][0].addr_write));
|
| 947 |
|
| 948 |
/* cmp 0(r1), r0 */
|
| 949 |
tcg_out_modrm_offset(s, OPC_CMP_GvEv, r0, r1, 0);
|
| 950 |
|
| 951 |
tcg_out_mov(s, r0, addr_reg); |
| 952 |
|
| 953 |
#if TARGET_LONG_BITS == 32 |
| 954 |
/* je label1 */
|
| 955 |
tcg_out8(s, OPC_JCC_short + JCC_JE); |
| 956 |
label1_ptr = s->code_ptr; |
| 957 |
s->code_ptr++; |
| 958 |
#else
|
| 959 |
/* jne label3 */
|
| 960 |
tcg_out8(s, OPC_JCC_short + JCC_JNE); |
| 961 |
label3_ptr = s->code_ptr; |
| 962 |
s->code_ptr++; |
| 963 |
|
| 964 |
/* cmp 4(r1), addr_reg2 */
|
| 965 |
tcg_out_modrm_offset(s, OPC_CMP_GvEv, addr_reg2, r1, 4);
|
| 966 |
|
| 967 |
/* je label1 */
|
| 968 |
tcg_out8(s, OPC_JCC_short + JCC_JE); |
| 969 |
label1_ptr = s->code_ptr; |
| 970 |
s->code_ptr++; |
| 971 |
|
| 972 |
/* label3: */
|
| 973 |
*label3_ptr = s->code_ptr - label3_ptr - 1;
|
| 974 |
#endif
|
| 975 |
|
| 976 |
/* XXX: move that code at the end of the TB */
|
| 977 |
#if TARGET_LONG_BITS == 32 |
| 978 |
if (opc == 3) { |
| 979 |
tcg_out_mov(s, TCG_REG_EDX, data_reg); |
| 980 |
tcg_out_mov(s, TCG_REG_ECX, data_reg2); |
| 981 |
tcg_out_pushi(s, mem_index); |
| 982 |
stack_adjust = 4;
|
| 983 |
} else {
|
| 984 |
switch(opc) {
|
| 985 |
case 0: |
| 986 |
tcg_out_ext8u(s, TCG_REG_EDX, data_reg); |
| 987 |
break;
|
| 988 |
case 1: |
| 989 |
tcg_out_ext16u(s, TCG_REG_EDX, data_reg); |
| 990 |
break;
|
| 991 |
case 2: |
| 992 |
tcg_out_mov(s, TCG_REG_EDX, data_reg); |
| 993 |
break;
|
| 994 |
} |
| 995 |
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index); |
| 996 |
stack_adjust = 0;
|
| 997 |
} |
| 998 |
#else
|
| 999 |
if (opc == 3) { |
| 1000 |
tcg_out_mov(s, TCG_REG_EDX, addr_reg2); |
| 1001 |
tcg_out_pushi(s, mem_index); |
| 1002 |
tcg_out_push(s, data_reg2); |
| 1003 |
tcg_out_push(s, data_reg); |
| 1004 |
stack_adjust = 12;
|
| 1005 |
} else {
|
| 1006 |
tcg_out_mov(s, TCG_REG_EDX, addr_reg2); |
| 1007 |
switch(opc) {
|
| 1008 |
case 0: |
| 1009 |
tcg_out_ext8u(s, TCG_REG_ECX, data_reg); |
| 1010 |
break;
|
| 1011 |
case 1: |
| 1012 |
tcg_out_ext16u(s, TCG_REG_ECX, data_reg); |
| 1013 |
break;
|
| 1014 |
case 2: |
| 1015 |
tcg_out_mov(s, TCG_REG_ECX, data_reg); |
| 1016 |
break;
|
| 1017 |
} |
| 1018 |
tcg_out_pushi(s, mem_index); |
| 1019 |
stack_adjust = 4;
|
| 1020 |
} |
| 1021 |
#endif
|
| 1022 |
|
| 1023 |
tcg_out_calli(s, (tcg_target_long)qemu_st_helpers[s_bits]); |
| 1024 |
|
| 1025 |
if (stack_adjust == 4) { |
| 1026 |
/* Pop and discard. This is 2 bytes smaller than the add. */
|
| 1027 |
tcg_out_pop(s, TCG_REG_ECX); |
| 1028 |
} else if (stack_adjust != 0) { |
| 1029 |
tcg_out_addi(s, TCG_REG_ESP, stack_adjust); |
| 1030 |
} |
| 1031 |
|
| 1032 |
/* jmp label2 */
|
| 1033 |
tcg_out8(s, OPC_JMP_short); |
| 1034 |
label2_ptr = s->code_ptr; |
| 1035 |
s->code_ptr++; |
| 1036 |
|
| 1037 |
/* label1: */
|
| 1038 |
*label1_ptr = s->code_ptr - label1_ptr - 1;
|
| 1039 |
|
| 1040 |
/* add x(r1), r0 */
|
| 1041 |
tcg_out_modrm_offset(s, OPC_ADD_GvEv, r0, r1, |
| 1042 |
offsetof(CPUTLBEntry, addend) - |
| 1043 |
offsetof(CPUTLBEntry, addr_write)); |
| 1044 |
#else
|
| 1045 |
r0 = addr_reg; |
| 1046 |
#endif
|
| 1047 |
|
| 1048 |
#ifdef TARGET_WORDS_BIGENDIAN
|
| 1049 |
bswap = 1;
|
| 1050 |
#else
|
| 1051 |
bswap = 0;
|
| 1052 |
#endif
|
| 1053 |
switch(opc) {
|
| 1054 |
case 0: |
| 1055 |
tcg_out_modrm_offset(s, OPC_MOVB_EvGv, data_reg, r0, GUEST_BASE); |
| 1056 |
break;
|
| 1057 |
case 1: |
| 1058 |
if (bswap) {
|
| 1059 |
tcg_out_mov(s, r1, data_reg); |
| 1060 |
tcg_out_rolw_8(s, r1); |
| 1061 |
data_reg = r1; |
| 1062 |
} |
| 1063 |
/* movw */
|
| 1064 |
tcg_out_modrm_offset(s, OPC_MOVL_EvGv | P_DATA16, |
| 1065 |
data_reg, r0, GUEST_BASE); |
| 1066 |
break;
|
| 1067 |
case 2: |
| 1068 |
if (bswap) {
|
| 1069 |
tcg_out_mov(s, r1, data_reg); |
| 1070 |
tcg_out_bswap32(s, r1); |
| 1071 |
data_reg = r1; |
| 1072 |
} |
| 1073 |
tcg_out_st(s, TCG_TYPE_I32, data_reg, r0, GUEST_BASE); |
| 1074 |
break;
|
| 1075 |
case 3: |
| 1076 |
if (bswap) {
|
| 1077 |
tcg_out_mov(s, r1, data_reg2); |
| 1078 |
tcg_out_bswap32(s, r1); |
| 1079 |
tcg_out_st(s, TCG_TYPE_I32, r1, r0, GUEST_BASE); |
| 1080 |
tcg_out_mov(s, r1, data_reg); |
| 1081 |
tcg_out_bswap32(s, r1); |
| 1082 |
tcg_out_st(s, TCG_TYPE_I32, r1, r0, GUEST_BASE + 4);
|
| 1083 |
} else {
|
| 1084 |
tcg_out_st(s, TCG_TYPE_I32, data_reg, r0, GUEST_BASE); |
| 1085 |
tcg_out_st(s, TCG_TYPE_I32, data_reg2, r0, GUEST_BASE + 4);
|
| 1086 |
} |
| 1087 |
break;
|
| 1088 |
default:
|
| 1089 |
tcg_abort(); |
| 1090 |
} |
| 1091 |
|
| 1092 |
#if defined(CONFIG_SOFTMMU)
|
| 1093 |
/* label2: */
|
| 1094 |
*label2_ptr = s->code_ptr - label2_ptr - 1;
|
| 1095 |
#endif
|
| 1096 |
} |
| 1097 |
|
| 1098 |
static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, |
| 1099 |
const TCGArg *args, const int *const_args) |
| 1100 |
{
|
| 1101 |
int c;
|
| 1102 |
|
| 1103 |
switch(opc) {
|
| 1104 |
case INDEX_op_exit_tb:
|
| 1105 |
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_EAX, args[0]);
|
| 1106 |
tcg_out8(s, OPC_JMP_long); /* jmp tb_ret_addr */
|
| 1107 |
tcg_out32(s, tb_ret_addr - s->code_ptr - 4);
|
| 1108 |
break;
|
| 1109 |
case INDEX_op_goto_tb:
|
| 1110 |
if (s->tb_jmp_offset) {
|
| 1111 |
/* direct jump method */
|
| 1112 |
tcg_out8(s, OPC_JMP_long); /* jmp im */
|
| 1113 |
s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
|
| 1114 |
tcg_out32(s, 0);
|
| 1115 |
} else {
|
| 1116 |
/* indirect jump method */
|
| 1117 |
tcg_out_modrm_offset(s, OPC_GRP5, EXT5_JMPN_Ev, -1,
|
| 1118 |
(tcg_target_long)(s->tb_next + args[0]));
|
| 1119 |
} |
| 1120 |
s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
|
| 1121 |
break;
|
| 1122 |
case INDEX_op_call:
|
| 1123 |
if (const_args[0]) { |
| 1124 |
tcg_out_calli(s, args[0]);
|
| 1125 |
} else {
|
| 1126 |
/* call *reg */
|
| 1127 |
tcg_out_modrm(s, OPC_GRP5, EXT5_CALLN_Ev, args[0]);
|
| 1128 |
} |
| 1129 |
break;
|
| 1130 |
case INDEX_op_jmp:
|
| 1131 |
if (const_args[0]) { |
| 1132 |
tcg_out8(s, OPC_JMP_long); |
| 1133 |
tcg_out32(s, args[0] - (tcg_target_long)s->code_ptr - 4); |
| 1134 |
} else {
|
| 1135 |
/* jmp *reg */
|
| 1136 |
tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, args[0]);
|
| 1137 |
} |
| 1138 |
break;
|
| 1139 |
case INDEX_op_br:
|
| 1140 |
tcg_out_jxx(s, JCC_JMP, args[0], 0); |
| 1141 |
break;
|
| 1142 |
case INDEX_op_movi_i32:
|
| 1143 |
tcg_out_movi(s, TCG_TYPE_I32, args[0], args[1]); |
| 1144 |
break;
|
| 1145 |
case INDEX_op_ld8u_i32:
|
| 1146 |
/* movzbl */
|
| 1147 |
tcg_out_modrm_offset(s, OPC_MOVZBL, args[0], args[1], args[2]); |
| 1148 |
break;
|
| 1149 |
case INDEX_op_ld8s_i32:
|
| 1150 |
/* movsbl */
|
| 1151 |
tcg_out_modrm_offset(s, OPC_MOVSBL, args[0], args[1], args[2]); |
| 1152 |
break;
|
| 1153 |
case INDEX_op_ld16u_i32:
|
| 1154 |
/* movzwl */
|
| 1155 |
tcg_out_modrm_offset(s, OPC_MOVZWL, args[0], args[1], args[2]); |
| 1156 |
break;
|
| 1157 |
case INDEX_op_ld16s_i32:
|
| 1158 |
/* movswl */
|
| 1159 |
tcg_out_modrm_offset(s, OPC_MOVSWL, args[0], args[1], args[2]); |
| 1160 |
break;
|
| 1161 |
case INDEX_op_ld_i32:
|
| 1162 |
tcg_out_ld(s, TCG_TYPE_I32, args[0], args[1], args[2]); |
| 1163 |
break;
|
| 1164 |
case INDEX_op_st8_i32:
|
| 1165 |
/* movb */
|
| 1166 |
tcg_out_modrm_offset(s, OPC_MOVB_EvGv, args[0], args[1], args[2]); |
| 1167 |
break;
|
| 1168 |
case INDEX_op_st16_i32:
|
| 1169 |
/* movw */
|
| 1170 |
tcg_out_modrm_offset(s, OPC_MOVL_EvGv | P_DATA16, |
| 1171 |
args[0], args[1], args[2]); |
| 1172 |
break;
|
| 1173 |
case INDEX_op_st_i32:
|
| 1174 |
tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); |
| 1175 |
break;
|
| 1176 |
case INDEX_op_add_i32:
|
| 1177 |
/* For 3-operand addition, use LEA. */
|
| 1178 |
if (args[0] != args[1]) { |
| 1179 |
TCGArg a0 = args[0], a1 = args[1], a2 = args[2], c3 = 0; |
| 1180 |
|
| 1181 |
if (const_args[2]) { |
| 1182 |
c3 = a2, a2 = -1;
|
| 1183 |
} else if (a0 == a2) { |
| 1184 |
/* Watch out for dest = src + dest, since we've removed
|
| 1185 |
the matching constraint on the add. */
|
| 1186 |
tgen_arithr(s, ARITH_ADD, a0, a1); |
| 1187 |
break;
|
| 1188 |
} |
| 1189 |
|
| 1190 |
tcg_out_modrm_sib_offset(s, OPC_LEA, a0, a1, a2, 0, c3);
|
| 1191 |
break;
|
| 1192 |
} |
| 1193 |
c = ARITH_ADD; |
| 1194 |
goto gen_arith;
|
| 1195 |
case INDEX_op_sub_i32:
|
| 1196 |
c = ARITH_SUB; |
| 1197 |
goto gen_arith;
|
| 1198 |
case INDEX_op_and_i32:
|
| 1199 |
c = ARITH_AND; |
| 1200 |
goto gen_arith;
|
| 1201 |
case INDEX_op_or_i32:
|
| 1202 |
c = ARITH_OR; |
| 1203 |
goto gen_arith;
|
| 1204 |
case INDEX_op_xor_i32:
|
| 1205 |
c = ARITH_XOR; |
| 1206 |
goto gen_arith;
|
| 1207 |
gen_arith:
|
| 1208 |
if (const_args[2]) { |
| 1209 |
tgen_arithi(s, c, args[0], args[2], 0); |
| 1210 |
} else {
|
| 1211 |
tgen_arithr(s, c, args[0], args[2]); |
| 1212 |
} |
| 1213 |
break;
|
| 1214 |
case INDEX_op_mul_i32:
|
| 1215 |
if (const_args[2]) { |
| 1216 |
int32_t val; |
| 1217 |
val = args[2];
|
| 1218 |
if (val == (int8_t)val) {
|
| 1219 |
tcg_out_modrm(s, OPC_IMUL_GvEvIb, args[0], args[0]); |
| 1220 |
tcg_out8(s, val); |
| 1221 |
} else {
|
| 1222 |
tcg_out_modrm(s, OPC_IMUL_GvEvIz, args[0], args[0]); |
| 1223 |
tcg_out32(s, val); |
| 1224 |
} |
| 1225 |
} else {
|
| 1226 |
tcg_out_modrm(s, OPC_IMUL_GvEv, args[0], args[2]); |
| 1227 |
} |
| 1228 |
break;
|
| 1229 |
case INDEX_op_mulu2_i32:
|
| 1230 |
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_MUL, args[3]);
|
| 1231 |
break;
|
| 1232 |
case INDEX_op_div2_i32:
|
| 1233 |
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_IDIV, args[4]);
|
| 1234 |
break;
|
| 1235 |
case INDEX_op_divu2_i32:
|
| 1236 |
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_DIV, args[4]);
|
| 1237 |
break;
|
| 1238 |
case INDEX_op_shl_i32:
|
| 1239 |
c = SHIFT_SHL; |
| 1240 |
gen_shift32:
|
| 1241 |
if (const_args[2]) { |
| 1242 |
tcg_out_shifti(s, c, args[0], args[2]); |
| 1243 |
} else {
|
| 1244 |
tcg_out_modrm(s, OPC_SHIFT_cl, c, args[0]);
|
| 1245 |
} |
| 1246 |
break;
|
| 1247 |
case INDEX_op_shr_i32:
|
| 1248 |
c = SHIFT_SHR; |
| 1249 |
goto gen_shift32;
|
| 1250 |
case INDEX_op_sar_i32:
|
| 1251 |
c = SHIFT_SAR; |
| 1252 |
goto gen_shift32;
|
| 1253 |
case INDEX_op_rotl_i32:
|
| 1254 |
c = SHIFT_ROL; |
| 1255 |
goto gen_shift32;
|
| 1256 |
case INDEX_op_rotr_i32:
|
| 1257 |
c = SHIFT_ROR; |
| 1258 |
goto gen_shift32;
|
| 1259 |
|
| 1260 |
case INDEX_op_add2_i32:
|
| 1261 |
if (const_args[4]) { |
| 1262 |
tgen_arithi(s, ARITH_ADD, args[0], args[4], 1); |
| 1263 |
} else {
|
| 1264 |
tgen_arithr(s, ARITH_ADD, args[0], args[4]); |
| 1265 |
} |
| 1266 |
if (const_args[5]) { |
| 1267 |
tgen_arithi(s, ARITH_ADC, args[1], args[5], 1); |
| 1268 |
} else {
|
| 1269 |
tgen_arithr(s, ARITH_ADC, args[1], args[5]); |
| 1270 |
} |
| 1271 |
break;
|
| 1272 |
case INDEX_op_sub2_i32:
|
| 1273 |
if (const_args[4]) { |
| 1274 |
tgen_arithi(s, ARITH_SUB, args[0], args[4], 1); |
| 1275 |
} else {
|
| 1276 |
tgen_arithr(s, ARITH_SUB, args[0], args[4]); |
| 1277 |
} |
| 1278 |
if (const_args[5]) { |
| 1279 |
tgen_arithi(s, ARITH_SBB, args[1], args[5], 1); |
| 1280 |
} else {
|
| 1281 |
tgen_arithr(s, ARITH_SBB, args[1], args[5]); |
| 1282 |
} |
| 1283 |
break;
|
| 1284 |
case INDEX_op_brcond_i32:
|
| 1285 |
tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], |
| 1286 |
args[3], 0); |
| 1287 |
break;
|
| 1288 |
case INDEX_op_brcond2_i32:
|
| 1289 |
tcg_out_brcond2(s, args, const_args, 0);
|
| 1290 |
break;
|
| 1291 |
|
| 1292 |
case INDEX_op_bswap16_i32:
|
| 1293 |
tcg_out_rolw_8(s, args[0]);
|
| 1294 |
break;
|
| 1295 |
case INDEX_op_bswap32_i32:
|
| 1296 |
tcg_out_bswap32(s, args[0]);
|
| 1297 |
break;
|
| 1298 |
|
| 1299 |
case INDEX_op_neg_i32:
|
| 1300 |
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_NEG, args[0]);
|
| 1301 |
break;
|
| 1302 |
|
| 1303 |
case INDEX_op_not_i32:
|
| 1304 |
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_NOT, args[0]);
|
| 1305 |
break;
|
| 1306 |
|
| 1307 |
case INDEX_op_ext8s_i32:
|
| 1308 |
tcg_out_ext8s(s, args[0], args[1]); |
| 1309 |
break;
|
| 1310 |
case INDEX_op_ext16s_i32:
|
| 1311 |
tcg_out_ext16s(s, args[0], args[1]); |
| 1312 |
break;
|
| 1313 |
case INDEX_op_ext8u_i32:
|
| 1314 |
tcg_out_ext8u(s, args[0], args[1]); |
| 1315 |
break;
|
| 1316 |
case INDEX_op_ext16u_i32:
|
| 1317 |
tcg_out_ext16u(s, args[0], args[1]); |
| 1318 |
break;
|
| 1319 |
|
| 1320 |
case INDEX_op_setcond_i32:
|
| 1321 |
tcg_out_setcond(s, args[3], args[0], args[1], args[2], const_args[2]); |
| 1322 |
break;
|
| 1323 |
case INDEX_op_setcond2_i32:
|
| 1324 |
tcg_out_setcond2(s, args, const_args); |
| 1325 |
break;
|
| 1326 |
|
| 1327 |
case INDEX_op_qemu_ld8u:
|
| 1328 |
tcg_out_qemu_ld(s, args, 0);
|
| 1329 |
break;
|
| 1330 |
case INDEX_op_qemu_ld8s:
|
| 1331 |
tcg_out_qemu_ld(s, args, 0 | 4); |
| 1332 |
break;
|
| 1333 |
case INDEX_op_qemu_ld16u:
|
| 1334 |
tcg_out_qemu_ld(s, args, 1);
|
| 1335 |
break;
|
| 1336 |
case INDEX_op_qemu_ld16s:
|
| 1337 |
tcg_out_qemu_ld(s, args, 1 | 4); |
| 1338 |
break;
|
| 1339 |
case INDEX_op_qemu_ld32:
|
| 1340 |
tcg_out_qemu_ld(s, args, 2);
|
| 1341 |
break;
|
| 1342 |
case INDEX_op_qemu_ld64:
|
| 1343 |
tcg_out_qemu_ld(s, args, 3);
|
| 1344 |
break;
|
| 1345 |
|
| 1346 |
case INDEX_op_qemu_st8:
|
| 1347 |
tcg_out_qemu_st(s, args, 0);
|
| 1348 |
break;
|
| 1349 |
case INDEX_op_qemu_st16:
|
| 1350 |
tcg_out_qemu_st(s, args, 1);
|
| 1351 |
break;
|
| 1352 |
case INDEX_op_qemu_st32:
|
| 1353 |
tcg_out_qemu_st(s, args, 2);
|
| 1354 |
break;
|
| 1355 |
case INDEX_op_qemu_st64:
|
| 1356 |
tcg_out_qemu_st(s, args, 3);
|
| 1357 |
break;
|
| 1358 |
|
| 1359 |
default:
|
| 1360 |
tcg_abort(); |
| 1361 |
} |
| 1362 |
} |
| 1363 |
|
| 1364 |
static const TCGTargetOpDef x86_op_defs[] = { |
| 1365 |
{ INDEX_op_exit_tb, { } },
|
| 1366 |
{ INDEX_op_goto_tb, { } },
|
| 1367 |
{ INDEX_op_call, { "ri" } },
|
| 1368 |
{ INDEX_op_jmp, { "ri" } },
|
| 1369 |
{ INDEX_op_br, { } },
|
| 1370 |
{ INDEX_op_mov_i32, { "r", "r" } },
|
| 1371 |
{ INDEX_op_movi_i32, { "r" } },
|
| 1372 |
{ INDEX_op_ld8u_i32, { "r", "r" } },
|
| 1373 |
{ INDEX_op_ld8s_i32, { "r", "r" } },
|
| 1374 |
{ INDEX_op_ld16u_i32, { "r", "r" } },
|
| 1375 |
{ INDEX_op_ld16s_i32, { "r", "r" } },
|
| 1376 |
{ INDEX_op_ld_i32, { "r", "r" } },
|
| 1377 |
{ INDEX_op_st8_i32, { "q", "r" } },
|
| 1378 |
{ INDEX_op_st16_i32, { "r", "r" } },
|
| 1379 |
{ INDEX_op_st_i32, { "r", "r" } },
|
| 1380 |
|
| 1381 |
{ INDEX_op_add_i32, { "r", "r", "ri" } },
|
| 1382 |
{ INDEX_op_sub_i32, { "r", "0", "ri" } },
|
| 1383 |
{ INDEX_op_mul_i32, { "r", "0", "ri" } },
|
| 1384 |
{ INDEX_op_mulu2_i32, { "a", "d", "a", "r" } },
|
| 1385 |
{ INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } },
|
| 1386 |
{ INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } },
|
| 1387 |
{ INDEX_op_and_i32, { "r", "0", "ri" } },
|
| 1388 |
{ INDEX_op_or_i32, { "r", "0", "ri" } },
|
| 1389 |
{ INDEX_op_xor_i32, { "r", "0", "ri" } },
|
| 1390 |
|
| 1391 |
{ INDEX_op_shl_i32, { "r", "0", "ci" } },
|
| 1392 |
{ INDEX_op_shr_i32, { "r", "0", "ci" } },
|
| 1393 |
{ INDEX_op_sar_i32, { "r", "0", "ci" } },
|
| 1394 |
{ INDEX_op_rotl_i32, { "r", "0", "ci" } },
|
| 1395 |
{ INDEX_op_rotr_i32, { "r", "0", "ci" } },
|
| 1396 |
|
| 1397 |
{ INDEX_op_brcond_i32, { "r", "ri" } },
|
| 1398 |
|
| 1399 |
{ INDEX_op_add2_i32, { "r", "r", "0", "1", "ri", "ri" } },
|
| 1400 |
{ INDEX_op_sub2_i32, { "r", "r", "0", "1", "ri", "ri" } },
|
| 1401 |
{ INDEX_op_brcond2_i32, { "r", "r", "ri", "ri" } },
|
| 1402 |
|
| 1403 |
{ INDEX_op_bswap16_i32, { "r", "0" } },
|
| 1404 |
{ INDEX_op_bswap32_i32, { "r", "0" } },
|
| 1405 |
|
| 1406 |
{ INDEX_op_neg_i32, { "r", "0" } },
|
| 1407 |
|
| 1408 |
{ INDEX_op_not_i32, { "r", "0" } },
|
| 1409 |
|
| 1410 |
{ INDEX_op_ext8s_i32, { "r", "q" } },
|
| 1411 |
{ INDEX_op_ext16s_i32, { "r", "r" } },
|
| 1412 |
{ INDEX_op_ext8u_i32, { "r", "q" } },
|
| 1413 |
{ INDEX_op_ext16u_i32, { "r", "r" } },
|
| 1414 |
|
| 1415 |
{ INDEX_op_setcond_i32, { "q", "r", "ri" } },
|
| 1416 |
{ INDEX_op_setcond2_i32, { "r", "r", "r", "ri", "ri" } },
|
| 1417 |
|
| 1418 |
#if TARGET_LONG_BITS == 32 |
| 1419 |
{ INDEX_op_qemu_ld8u, { "r", "L" } },
|
| 1420 |
{ INDEX_op_qemu_ld8s, { "r", "L" } },
|
| 1421 |
{ INDEX_op_qemu_ld16u, { "r", "L" } },
|
| 1422 |
{ INDEX_op_qemu_ld16s, { "r", "L" } },
|
| 1423 |
{ INDEX_op_qemu_ld32, { "r", "L" } },
|
| 1424 |
{ INDEX_op_qemu_ld64, { "r", "r", "L" } },
|
| 1425 |
|
| 1426 |
{ INDEX_op_qemu_st8, { "cb", "L" } },
|
| 1427 |
{ INDEX_op_qemu_st16, { "L", "L" } },
|
| 1428 |
{ INDEX_op_qemu_st32, { "L", "L" } },
|
| 1429 |
{ INDEX_op_qemu_st64, { "L", "L", "L" } },
|
| 1430 |
#else
|
| 1431 |
{ INDEX_op_qemu_ld8u, { "r", "L", "L" } },
|
| 1432 |
{ INDEX_op_qemu_ld8s, { "r", "L", "L" } },
|
| 1433 |
{ INDEX_op_qemu_ld16u, { "r", "L", "L" } },
|
| 1434 |
{ INDEX_op_qemu_ld16s, { "r", "L", "L" } },
|
| 1435 |
{ INDEX_op_qemu_ld32, { "r", "L", "L" } },
|
| 1436 |
{ INDEX_op_qemu_ld64, { "r", "r", "L", "L" } },
|
| 1437 |
|
| 1438 |
{ INDEX_op_qemu_st8, { "cb", "L", "L" } },
|
| 1439 |
{ INDEX_op_qemu_st16, { "L", "L", "L" } },
|
| 1440 |
{ INDEX_op_qemu_st32, { "L", "L", "L" } },
|
| 1441 |
{ INDEX_op_qemu_st64, { "L", "L", "L", "L" } },
|
| 1442 |
#endif
|
| 1443 |
{ -1 },
|
| 1444 |
}; |
| 1445 |
|
| 1446 |
static int tcg_target_callee_save_regs[] = { |
| 1447 |
/* TCG_REG_EBP, */ /* currently used for the global env, so no |
| 1448 |
need to save */
|
| 1449 |
TCG_REG_EBX, |
| 1450 |
TCG_REG_ESI, |
| 1451 |
TCG_REG_EDI, |
| 1452 |
}; |
| 1453 |
|
| 1454 |
/* Generate global QEMU prologue and epilogue code */
|
| 1455 |
void tcg_target_qemu_prologue(TCGContext *s)
|
| 1456 |
{
|
| 1457 |
int i, frame_size, push_size, stack_addend;
|
| 1458 |
|
| 1459 |
/* TB prologue */
|
| 1460 |
/* save all callee saved registers */
|
| 1461 |
for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { |
| 1462 |
tcg_out_push(s, tcg_target_callee_save_regs[i]); |
| 1463 |
} |
| 1464 |
/* reserve some stack space */
|
| 1465 |
push_size = 4 + ARRAY_SIZE(tcg_target_callee_save_regs) * 4; |
| 1466 |
frame_size = push_size + TCG_STATIC_CALL_ARGS_SIZE; |
| 1467 |
frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) &
|
| 1468 |
~(TCG_TARGET_STACK_ALIGN - 1);
|
| 1469 |
stack_addend = frame_size - push_size; |
| 1470 |
tcg_out_addi(s, TCG_REG_ESP, -stack_addend); |
| 1471 |
|
| 1472 |
tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, TCG_REG_EAX); /* jmp *%eax */
|
| 1473 |
|
| 1474 |
/* TB epilogue */
|
| 1475 |
tb_ret_addr = s->code_ptr; |
| 1476 |
tcg_out_addi(s, TCG_REG_ESP, stack_addend); |
| 1477 |
for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) { |
| 1478 |
tcg_out_pop(s, tcg_target_callee_save_regs[i]); |
| 1479 |
} |
| 1480 |
tcg_out_opc(s, OPC_RET); |
| 1481 |
} |
| 1482 |
|
| 1483 |
void tcg_target_init(TCGContext *s)
|
| 1484 |
{
|
| 1485 |
#if !defined(CONFIG_USER_ONLY)
|
| 1486 |
/* fail safe */
|
| 1487 |
if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry)) |
| 1488 |
tcg_abort(); |
| 1489 |
#endif
|
| 1490 |
|
| 1491 |
tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xff); |
| 1492 |
|
| 1493 |
tcg_regset_clear(tcg_target_call_clobber_regs); |
| 1494 |
tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EAX); |
| 1495 |
tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EDX); |
| 1496 |
tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_ECX); |
| 1497 |
|
| 1498 |
tcg_regset_clear(s->reserved_regs); |
| 1499 |
tcg_regset_set_reg(s->reserved_regs, TCG_REG_ESP); |
| 1500 |
|
| 1501 |
tcg_add_target_add_op_defs(x86_op_defs); |
| 1502 |
} |