diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/i386/tcg-target.c | 49 |
1 files changed, 27 insertions, 22 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index 5557f8cc8c..efc2a82dbf 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -163,6 +163,7 @@ static inline int tcg_target_const_match(tcg_target_long val, #define OPC_ARITH_GvEv (0x03) /* ... plus (ARITH_FOO << 3) */ #define OPC_ADD_GvEv (OPC_ARITH_GvEv | (ARITH_ADD << 3)) #define OPC_BSWAP (0xc8 | P_EXT) +#define OPC_CALL_Jz (0xe8) #define OPC_CMP_GvEv (OPC_ARITH_GvEv | (ARITH_CMP << 3)) #define OPC_DEC_r32 (0x48) #define OPC_INC_r32 (0x40) @@ -205,6 +206,7 @@ static inline int tcg_target_const_match(tcg_target_long val, #define SHIFT_SAR 7 /* Group 5 opcode extensions for 0xff. */ +#define EXT_CALLN_Ev 2 #define EXT_JMPN_Ev 4 /* Condition codes to be added to OPC_JCC_{long,short}. */ @@ -621,6 +623,12 @@ static void tcg_out_setcond2(TCGContext *s, const TCGArg *args, } } +static void tcg_out_calli(TCGContext *s, tcg_target_long dest) +{ + tcg_out_opc(s, OPC_CALL_Jz); + tcg_out32(s, dest - (tcg_target_long)s->code_ptr - 4); +} + #if defined(CONFIG_SOFTMMU) #include "../../softmmu_defs.h" @@ -725,9 +733,7 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, 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); + tcg_out_calli(s, (tcg_target_long)qemu_ld_helpers[s_bits]); switch(opc) { case 0 | 4: @@ -844,6 +850,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, { int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap; #if defined(CONFIG_SOFTMMU) + int stack_adjust; uint8_t *label1_ptr, *label2_ptr; #endif #if TARGET_LONG_BITS == 64 @@ -917,10 +924,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, tcg_out_mov(s, TCG_REG_EDX, data_reg); tcg_out_mov(s, TCG_REG_ECX, data_reg2); tcg_out_pushi(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); + stack_adjust = 4; } else { switch(opc) { case 0: @@ -934,9 +938,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, 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); + stack_adjust = 0; } #else if (opc == 3) { @@ -944,10 +946,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, tcg_out_pushi(s, mem_index); tcg_out_push(s, data_reg2); tcg_out_push(s, data_reg); - 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); + stack_adjust = 12; } else { tcg_out_mov(s, TCG_REG_EDX, addr_reg2); switch(opc) { @@ -962,13 +961,19 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, break; } tcg_out_pushi(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); + stack_adjust = 4; } #endif - + + tcg_out_calli(s, (tcg_target_long)qemu_st_helpers[s_bits]); + + if (stack_adjust == 4) { + /* Pop and discard. This is 2 bytes smaller than the add. */ + tcg_out_pop(s, TCG_REG_ECX); + } else if (stack_adjust != 0) { + tcg_out_addi(s, TCG_REG_ESP, stack_adjust); + } + /* jmp label2 */ tcg_out8(s, OPC_JMP_short); label2_ptr = s->code_ptr; @@ -1061,10 +1066,10 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, 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); + tcg_out_calli(s, args[0]); } else { - tcg_out_modrm(s, 0xff, 2, args[0]); + /* call *reg */ + tcg_out_modrm(s, 0xff, EXT_CALLN_Ev, args[0]); } break; case INDEX_op_jmp: |