[Qemu-devel] [PATCH 2/4] softfloat: add float32_set_sign(), float32_infinity, float64_half, float64_256 and float64_512.

[Christophe Lyon <christophe.lyon@st.com>]

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 <christophe.lyon@st.com>
---
 fpu/softfloat.h |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index f34a938..9bd4a50 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -379,9 +379,15 @@ 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_infinity make_float32(0x7f800000)
 
 
 /*----------------------------------------------------------------------------
@@ -482,6 +488,9 @@ INLINE int float64_is_any_nan(float64 a)
 #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_256 make_float64(0x4070000000000000LL)
+#define float64_512 make_float64(0x4080000000000000LL)
 
 /*----------------------------------------------------------------------------
 | The pattern for a default generated double-precision NaN.
-- 
1.7.2.3