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[Qemu-devel] [PATCH 1/6] tcg-sparc: Implement neg.
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 1/6] tcg-sparc: Implement neg. |
Date: |
Tue, 16 Feb 2010 13:55:15 -0800 |
The fallback implementation of "ret = 0 - arg1" isn't ideal,
first because of the extra tcg op to load the zero, and second
because we fail to handle zero as %g0 for arg1 of the sub.
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/sparc/tcg-target.c | 13 +++++++++++++
tcg/sparc/tcg-target.h | 5 +++--
2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index dd7a598..9f0fd0b 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -1126,6 +1126,10 @@ static inline void tcg_out_op(TCGContext *s, int opc,
const TCGArg *args,
c = ARITH_UMUL;
goto gen_arith;
+ OP_32_64(neg):
+ c = ARITH_SUB;
+ goto gen_arith1;
+
case INDEX_op_div_i32:
tcg_out_div32(s, args[0], args[1], args[2], const_args[2], 0);
break;
@@ -1269,6 +1273,10 @@ static inline void tcg_out_op(TCGContext *s, int opc,
const TCGArg *args,
tcg_out_arithc(s, args[0], args[1], args[2], const_args[2], c);
break;
+ gen_arith1:
+ tcg_out_arithc(s, args[0], TCG_REG_G0, args[1], const_args[1], c);
+ break;
+
default:
fprintf(stderr, "unknown opcode 0x%x\n", opc);
tcg_abort();
@@ -1308,6 +1316,8 @@ static const TCGTargetOpDef sparc_op_defs[] = {
{ INDEX_op_shr_i32, { "r", "r", "rJ" } },
{ INDEX_op_sar_i32, { "r", "r", "rJ" } },
+ { INDEX_op_neg_i32, { "r", "rJ" } },
+
{ INDEX_op_brcond_i32, { "r", "rJ" } },
#if TCG_TARGET_REG_BITS == 32
{ INDEX_op_brcond2_i32, { "r", "r", "rJ", "rJ" } },
@@ -1358,6 +1368,9 @@ static const TCGTargetOpDef sparc_op_defs[] = {
{ INDEX_op_shl_i64, { "r", "r", "rJ" } },
{ INDEX_op_shr_i64, { "r", "r", "rJ" } },
{ INDEX_op_sar_i64, { "r", "r", "rJ" } },
+
+ { INDEX_op_neg_i64, { "r", "rJ" } },
+
{ INDEX_op_ext32s_i64, { "r", "ri" } },
{ INDEX_op_ext32u_i64, { "r", "ri" } },
diff --git a/tcg/sparc/tcg-target.h b/tcg/sparc/tcg-target.h
index d27ed5a..66031ba 100644
--- a/tcg/sparc/tcg-target.h
+++ b/tcg/sparc/tcg-target.h
@@ -91,15 +91,16 @@ enum {
#define TCG_TARGET_HAS_div_i32
#define TCG_TARGET_HAS_div_i64
+#define TCG_TARGET_HAS_neg_i32
+
#if TCG_TARGET_REG_BITS == 64
#define TCG_TARGET_HAS_ext32s_i64
#define TCG_TARGET_HAS_ext32u_i64
+#define TCG_TARGET_HAS_neg_i64
#endif
//#define TCG_TARGET_HAS_bswap32_i32
//#define TCG_TARGET_HAS_bswap64_i64
-//#define TCG_TARGET_HAS_neg_i32
-//#define TCG_TARGET_HAS_neg_i64
/* Note: must be synced with dyngen-exec.h and Makefile.target */
--
1.6.2.5
- [Qemu-devel] [PATCH 0/6] tcg-sparc improvements, Richard Henderson, 2010/02/16
- [Qemu-devel] [PATCH 2/6] tcg-sparc: Implement not., Richard Henderson, 2010/02/16
- [Qemu-devel] [PATCH 3/6] tcg: Optional target implementation of ANDC., Richard Henderson, 2010/02/16
- [Qemu-devel] [PATCH 6/6] tcg-sparc: Implement ORC., Richard Henderson, 2010/02/16
- [Qemu-devel] [PATCH 5/6] tcg-sparc: Implement ANDC., Richard Henderson, 2010/02/16
- [Qemu-devel] [PATCH 4/6] tcg: Optional target implementation of ORC., Richard Henderson, 2010/02/16
- [Qemu-devel] [PATCH 1/6] tcg-sparc: Implement neg.,
Richard Henderson <=
- [Qemu-devel] Re: [PATCH 0/6] tcg-sparc improvements, Blue Swirl, 2010/02/17