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-rw-r--r--tcg/i386/tcg-target.c96
1 files changed, 48 insertions, 48 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c
index 85c6b81..a87c8ba 100644
--- a/tcg/i386/tcg-target.c
+++ b/tcg/i386/tcg-target.c
@@ -88,6 +88,18 @@ static const int tcg_target_call_oarg_regs[] = {
#endif
};
+/* Registers used with L constraint, which are the first argument
+ registers on x86_64, and two random call clobbered registers on
+ i386. */
+#if TCG_TARGET_REG_BITS == 64
+# define TCG_REG_L0 tcg_target_call_iarg_regs[0]
+# define TCG_REG_L1 tcg_target_call_iarg_regs[1]
+# define TCG_REG_L2 tcg_target_call_iarg_regs[2]
+#else
+# define TCG_REG_L0 TCG_REG_EAX
+# define TCG_REG_L1 TCG_REG_EDX
+#endif
+
static uint8_t *tb_ret_addr;
static void patch_reloc(uint8_t *code_ptr, int type,
@@ -179,16 +191,16 @@ static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
/* qemu_ld/st address constraint */
case 'L':
ct->ct |= TCG_CT_REG;
- if (TCG_TARGET_REG_BITS == 64) {
+#if TCG_TARGET_REG_BITS == 64
tcg_regset_set32(ct->u.regs, 0, 0xffff);
- tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[0]);
- tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[1]);
- tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[2]);
- } else {
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_L0);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_L1);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_L2);
+#else
tcg_regset_set32(ct->u.regs, 0, 0xff);
- tcg_regset_reset_reg(ct->u.regs, TCG_REG_EAX);
- tcg_regset_reset_reg(ct->u.regs, TCG_REG_EDX);
- }
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_L0);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_L1);
+#endif
break;
case 'e':
@@ -1029,8 +1041,8 @@ static inline void tcg_out_tlb_load(TCGContext *s, int addrlo_idx,
uint8_t **label_ptr, int which)
{
const int addrlo = args[addrlo_idx];
- const int r0 = tcg_target_call_iarg_regs[0];
- const int r1 = tcg_target_call_iarg_regs[1];
+ const int r0 = TCG_REG_L0;
+ const int r1 = TCG_REG_L1;
TCGType type = TCG_TYPE_I32;
int rexw = 0;
@@ -1192,8 +1204,7 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
label_ptr, offsetof(CPUTLBEntry, addr_read));
/* TLB Hit. */
- tcg_out_qemu_ld_direct(s, data_reg, data_reg2,
- tcg_target_call_iarg_regs[0], 0, opc);
+ tcg_out_qemu_ld_direct(s, data_reg, data_reg2, TCG_REG_L0, 0, opc);
/* jmp label2 */
tcg_out8(s, OPC_JMP_short);
@@ -1226,14 +1237,10 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[arg_idx],
mem_index);
/* XXX/FIXME: suboptimal */
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[3],
- tcg_target_call_iarg_regs[2]);
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2],
- tcg_target_call_iarg_regs[1]);
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1],
- tcg_target_call_iarg_regs[0]);
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0],
- TCG_AREG0);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[3], TCG_REG_L2);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2], TCG_REG_L1);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1], TCG_REG_L0);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0], TCG_AREG0);
#endif
tcg_out_calli(s, (tcg_target_long)qemu_ld_helpers[s_bits]);
@@ -1299,11 +1306,9 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
use the ADDR32 prefix. For now, do nothing. */
if (offset != GUEST_BASE) {
- tcg_out_movi(s, TCG_TYPE_I64,
- tcg_target_call_iarg_regs[0], GUEST_BASE);
- tgen_arithr(s, ARITH_ADD + P_REXW,
- tcg_target_call_iarg_regs[0], base);
- base = tcg_target_call_iarg_regs[0];
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_L0, GUEST_BASE);
+ tgen_arithr(s, ARITH_ADD + P_REXW, TCG_REG_L0, base);
+ base = TCG_REG_L0;
offset = 0;
}
}
@@ -1324,8 +1329,8 @@ static void tcg_out_qemu_st_direct(TCGContext *s, int datalo, int datahi,
/* ??? Ideally we wouldn't need a scratch register. For user-only,
we could perform the bswap twice to restore the original value
instead of moving to the scratch. But as it is, the L constraint
- means that the second argument reg is definitely free here. */
- int scratch = tcg_target_call_iarg_regs[1];
+ means that TCG_REG_L1 is definitely free here. */
+ const int scratch = TCG_REG_L1;
switch (sizeop) {
case 0:
@@ -1398,8 +1403,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
label_ptr, offsetof(CPUTLBEntry, addr_write));
/* TLB Hit. */
- tcg_out_qemu_st_direct(s, data_reg, data_reg2,
- tcg_target_call_iarg_regs[0], 0, opc);
+ tcg_out_qemu_st_direct(s, data_reg, data_reg2, TCG_REG_L0, 0, opc);
/* jmp label2 */
tcg_out8(s, OPC_JMP_short);
@@ -1434,18 +1438,14 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
stack_adjust += 4;
#else
tcg_out_mov(s, (opc == 3 ? TCG_TYPE_I64 : TCG_TYPE_I32),
- tcg_target_call_iarg_regs[1], data_reg);
- tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[2], mem_index);
+ TCG_REG_L1, data_reg);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_L2, mem_index);
stack_adjust = 0;
/* XXX/FIXME: suboptimal */
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[3],
- tcg_target_call_iarg_regs[2]);
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2],
- tcg_target_call_iarg_regs[1]);
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1],
- tcg_target_call_iarg_regs[0]);
- tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0],
- TCG_AREG0);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[3], TCG_REG_L2);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2], TCG_REG_L1);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1], TCG_REG_L0);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0], TCG_AREG0);
#endif
tcg_out_calli(s, (tcg_target_long)qemu_st_helpers[s_bits]);
@@ -1472,11 +1472,9 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
use the ADDR32 prefix. For now, do nothing. */
if (offset != GUEST_BASE) {
- tcg_out_movi(s, TCG_TYPE_I64,
- tcg_target_call_iarg_regs[0], GUEST_BASE);
- tgen_arithr(s, ARITH_ADD + P_REXW,
- tcg_target_call_iarg_regs[0], base);
- base = tcg_target_call_iarg_regs[0];
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_L0, GUEST_BASE);
+ tgen_arithr(s, ARITH_ADD + P_REXW, TCG_REG_L0, base);
+ base = TCG_REG_L0;
offset = 0;
}
}
@@ -2061,15 +2059,17 @@ static void tcg_target_qemu_prologue(TCGContext *s)
#if TCG_TARGET_REG_BITS == 32
tcg_out_ld(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP,
(ARRAY_SIZE(tcg_target_callee_save_regs) + 1) * 4);
- tcg_out_ld(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[1], TCG_REG_ESP,
- (ARRAY_SIZE(tcg_target_callee_save_regs) + 2) * 4);
+ tcg_out_addi(s, TCG_REG_ESP, -stack_addend);
+ /* jmp *tb. */
+ tcg_out_modrm_offset(s, OPC_GRP5, EXT5_JMPN_Ev, TCG_REG_ESP,
+ (ARRAY_SIZE(tcg_target_callee_save_regs) + 2) * 4
+ + stack_addend);
#else
tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
-#endif
tcg_out_addi(s, TCG_REG_ESP, -stack_addend);
-
/* jmp *tb. */
tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, tcg_target_call_iarg_regs[1]);
+#endif
/* TB epilogue */
tb_ret_addr = s->code_ptr;