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tcg-i386: Tidy push/pop. 

Move tcg_out_push/pop up in the file so that they can be used
by qemu_ld/st.  Define a tcg_out_pushi to be used as well.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-05-21 08:30:26 -07:00 committed by Aurelien Jarno
parent ef10b106b6
commit 6858614e6c
1 changed files with 30 additions and 18 deletions
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48
tcg/i386/tcg-target.c
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@ -178,6 +178,10 @@ static inline int tcg_target_const_match(tcg_target_long val,
#define OPC_MOVSWL (0xbf | P_EXT)
#define OPC_MOVZBL (0xb6 | P_EXT)
#define OPC_MOVZWL (0xb7 | P_EXT)
#define OPC_POP_r32 (0x58)
#define OPC_PUSH_r32 (0x50)
#define OPC_PUSH_Iv (0x68)
#define OPC_PUSH_Ib (0x6a)
#define OPC_SHIFT_1 (0xd1)
#define OPC_SHIFT_Ib (0xc1)
#define OPC_SHIFT_cl (0xd3)
@ -306,6 +310,27 @@ static inline void tcg_out_movi(TCGContext *s, TCGType type,
}
}
static inline void tcg_out_pushi(TCGContext *s, tcg_target_long val)
{
if (val == (int8_t)val) {
tcg_out_opc(s, OPC_PUSH_Ib);
tcg_out8(s, val);
} else {
tcg_out_opc(s, OPC_PUSH_Iv);
tcg_out32(s, val);
}
}
static inline void tcg_out_push(TCGContext *s, int reg)
{
tcg_out_opc(s, OPC_PUSH_r32 + reg);
}
static inline void tcg_out_pop(TCGContext *s, int reg)
{
tcg_out_opc(s, OPC_POP_r32 + reg);
}
static inline void tcg_out_ld(TCGContext *s, TCGType type, int ret,
int arg1, tcg_target_long arg2)
{
@ -891,8 +916,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
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_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);
@ -917,10 +941,9 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
#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_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);
@ -938,8 +961,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
tcg_out_mov(s, TCG_REG_ECX, data_reg);
break;
}
tcg_out8(s, 0x6a); /* push Ib */
tcg_out8(s, mem_index);
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);
@ -1352,16 +1374,6 @@ static int tcg_target_callee_save_regs[] = {
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)
{