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[Qemu-devel] [PATCH 2/5] softfloat: add _set_sign(), _infinity and _half
From: |
Christophe Lyon |
Subject: |
[Qemu-devel] [PATCH 2/5] softfloat: add _set_sign(), _infinity and _half for 32 and 64 bits floats. |
Date: |
Mon, 21 Feb 2011 17:38:45 +0100 |
These constants and utility function are needed to implement some
helpers. Defining constants avoids the need to re-compute them at
runtime.
Signed-off-by: Christophe Lyon <address@hidden>
---
fpu/softfloat.h | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index f34a938..fd61dc4 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -379,9 +379,16 @@ INLINE int float32_is_zero_or_denormal(float32 a)
return (float32_val(a) & 0x7f800000) == 0;
}
+INLINE float32 float32_set_sign(float32 a, int sign)
+{
+ return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
+}
+
#define float32_zero make_float32(0)
#define float32_one make_float32(0x3f800000)
#define float32_ln2 make_float32(0x3f317218)
+#define float32_half make_float32(0x3f000000)
+#define float32_infinity make_float32(0x7f800000)
/*----------------------------------------------------------------------------
@@ -479,9 +486,17 @@ INLINE int float64_is_any_nan(float64 a)
return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
}
+INLINE float64 float64_set_sign(float64 a, int sign)
+{
+ return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
+ | ((int64_t)sign << 63));
+}
+
#define float64_zero make_float64(0)
#define float64_one make_float64(0x3ff0000000000000LL)
#define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
+#define float64_half make_float64(0x3fe0000000000000LL)
+#define float64_infinity make_float64(0x7ff0000000000000LL)
/*----------------------------------------------------------------------------
| The pattern for a default generated double-precision NaN.
--
1.7.2.3
- [Qemu-devel] [PATCH v6 0/5] ARM: fix Neon VRECPE and VRSQRTE instructions., Christophe Lyon, 2011/02/21
- [Qemu-devel] [PATCH 3/5] target-arm: Introduce float64_256 and float64_512 constants., Christophe Lyon, 2011/02/21
- [Qemu-devel] [PATCH 4/5] target-arm: fix support for VRECPE., Christophe Lyon, 2011/02/21
- [Qemu-devel] [PATCH 2/5] softfloat: add _set_sign(), _infinity and _half for 32 and 64 bits floats.,
Christophe Lyon <=
- [Qemu-devel] [PATCH 1/5] softfloat: move all default NaN definitions to softfloat.h., Christophe Lyon, 2011/02/21
- [Qemu-devel] [PATCH 5/5] target-arm: fix support for VRSQRTE., Christophe Lyon, 2011/02/21
- Re: [Qemu-devel] [PATCH v6 0/5] ARM: fix Neon VRECPE and VRSQRTE instructions., Aurelien Jarno, 2011/02/24