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[Qemu-devel] [PATCH 2/5] tcg-x86_64: Implement setcond.
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 2/5] tcg-x86_64: Implement setcond. |
Date: |
Sat, 19 Dec 2009 08:50:19 -0800 |
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/x86_64/tcg-target.c | 38 +++++++++++++++++++++++++++++++++-----
1 files changed, 33 insertions(+), 5 deletions(-)
diff --git a/tcg/x86_64/tcg-target.c b/tcg/x86_64/tcg-target.c
index 2339091..33dc452 100644
--- a/tcg/x86_64/tcg-target.c
+++ b/tcg/x86_64/tcg-target.c
@@ -491,26 +491,42 @@ static void tcg_out_jxx(TCGContext *s, int opc, int
label_index)
}
}
-static void tcg_out_brcond(TCGContext *s, int cond,
- TCGArg arg1, TCGArg arg2, int const_arg2,
- int label_index, int rexw)
+static void tcg_out_cmp(TCGContext *s, TCGArg arg1, TCGArg arg2,
+ int const_arg2, int rexw)
{
if (const_arg2) {
if (arg2 == 0) {
/* test r, r */
tcg_out_modrm(s, 0x85 | rexw, arg1, arg1);
} else {
- if (rexw)
+ if (rexw) {
tgen_arithi64(s, ARITH_CMP, arg1, arg2);
- else
+ } else {
tgen_arithi32(s, ARITH_CMP, arg1, arg2);
+ }
}
} else {
tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3) | rexw, arg2, arg1);
}
+}
+
+static void tcg_out_brcond(TCGContext *s, int cond,
+ TCGArg arg1, TCGArg arg2, int const_arg2,
+ int label_index, int rexw)
+{
+ tcg_out_cmp(s, arg1, arg2, const_arg2, rexw);
tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
}
+static void tcg_out_setcond(TCGContext *s, int cond, TCGArg dest,
+ TCGArg arg1, TCGArg arg2, int const_arg2, int rexw)
+{
+ tcg_out_cmp(s, arg1, arg2, const_arg2, rexw);
+ /* setcc */
+ tcg_out_modrm(s, 0x90 | tcg_cond_to_jcc[cond] | P_EXT | P_REXB, 0, dest);
+ tgen_arithi32(s, ARITH_AND, dest, 0xff);
+}
+
#if defined(CONFIG_SOFTMMU)
#include "../../softmmu_defs.h"
@@ -1197,6 +1213,15 @@ static inline void tcg_out_op(TCGContext *s, int opc,
const TCGArg *args,
tcg_out_modrm(s, 0x8b, args[0], args[1]);
break;
+ case INDEX_op_setcond_i32:
+ tcg_out_setcond(s, args[3], args[0], args[1], args[2],
+ const_args[2], 0);
+ break;
+ case INDEX_op_setcond_i64:
+ tcg_out_setcond(s, args[3], args[0], args[1], args[2],
+ const_args[2], P_REXW);
+ break;
+
case INDEX_op_qemu_ld8u:
tcg_out_qemu_ld(s, args, 0);
break;
@@ -1376,6 +1401,9 @@ static const TCGTargetOpDef x86_64_op_defs[] = {
{ INDEX_op_ext16u_i64, { "r", "r"} },
{ INDEX_op_ext32u_i64, { "r", "r"} },
+ { INDEX_op_setcond_i32, { "r", "r", "ri" } },
+ { INDEX_op_setcond_i64, { "r", "r", "re" } },
+
{ INDEX_op_qemu_ld8u, { "r", "L" } },
{ INDEX_op_qemu_ld8s, { "r", "L" } },
{ INDEX_op_qemu_ld16u, { "r", "L" } },
--
1.6.5.2