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[Qemu-devel] [PATCH 6/6] target-ppc: Implement correct NaN propagation r
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH 6/6] target-ppc: Implement correct NaN propagation rules |
Date: |
Mon, 3 Jan 2011 15:34:33 +0100 |
Implement the correct NaN propagation rules for ARM targets by
providing an appropriate pickNaN function.
Also fix the #ifdef tests for default NaN definition, the correct name
is TARGET_PPC instead of TARGET_POWERPC.
Cc: Alexander Graf <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
fpu/softfloat-specialize.h | 19 +++++++++++++++++--
1 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h
index 150500b..0f6dbd0 100644
--- a/fpu/softfloat-specialize.h
+++ b/fpu/softfloat-specialize.h
@@ -61,7 +61,7 @@ typedef struct {
*----------------------------------------------------------------------------*/
#if defined(TARGET_SPARC)
#define float32_default_nan make_float32(0x7FFFFFFF)
-#elif defined(TARGET_POWERPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
+#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
#define float32_default_nan make_float32(0x7FC00000)
#elif SNAN_BIT_IS_ONE
#define float32_default_nan make_float32(0x7FBFFFFF)
@@ -214,6 +214,21 @@ static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag
bIsQNaN, flag bIsSNaN,
return 1;
}
}
+#elif defined(TARGET_PPC)
+static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,
+ flag aIsLargerSignificand)
+{
+ /* PowerPC propagation rules:
+ * 1. A if it sNaN or qNaN
+ * 2. B if it sNaN or qNaN
+ * A signaling NaN is always quietened before returning it.
+ */
+ if (aIsSNaN || aIsQNaN) {
+ return 0;
+ } else {
+ return 1;
+ }
+}
#else
static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,
flag aIsLargerSignificand)
@@ -292,7 +307,7 @@ static float32 propagateFloat32NaN( float32 a, float32 b
STATUS_PARAM)
*----------------------------------------------------------------------------*/
#if defined(TARGET_SPARC)
#define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
-#elif defined(TARGET_POWERPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
+#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
#define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
#elif SNAN_BIT_IS_ONE
#define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
--
1.7.2.3
- Re: [Qemu-devel] [PATCH 1/6] softfloat: remove HPPA specific code, (continued)
- [Qemu-devel] [PATCH 2/6] softfloat: fix float{32, 64}_maybe_silence_nan() for MIPS, Aurelien Jarno, 2011/01/03
- [Qemu-devel] [PATCH 4/6] softfloat: use float{32, 64, x80, 128}_maybe_silence_nan(), Aurelien Jarno, 2011/01/03
- [Qemu-devel] [PATCH 3/6] softfloat: add float{x80, 128}_maybe_silence_nan(), Aurelien Jarno, 2011/01/03
- [Qemu-devel] [PATCH 5/6] target-mips: Implement correct NaN propagation rules, Aurelien Jarno, 2011/01/03
- [Qemu-devel] [PATCH 6/6] target-ppc: Implement correct NaN propagation rules,
Aurelien Jarno <=