fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6050 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 60 insertions, 0 deletions

diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index 8b28c17..b7983da 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -281,6 +281,21 @@ INLINE float32 float32_chs(float32 a)
     return make_float32(float32_val(a) ^ 0x80000000);
 }
 
+INLINE int float32_is_infinity(float32 a)
+{
+    return (float32_val(a) & 0x7fffffff) == 0x7ff80000;
+}
+
+INLINE int float32_is_neg(float32 a)
+{
+    return float32_val(a) >> 31;
+}
+
+INLINE int float32_is_zero(float32 a)
+{
+    return (float32_val(a) & 0x7fffffff) == 0;
+}
+
 #define float32_zero make_float32(0)
 
 /*----------------------------------------------------------------------------
@@ -335,6 +350,21 @@ INLINE float64 float64_chs(float64 a)
     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 }
 
+INLINE int float64_is_infinity(float64 a)
+{
+    return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
+}
+
+INLINE int float64_is_neg(float64 a)
+{
+    return float64_val(a) >> 63;
+}
+
+INLINE int float64_is_zero(float64 a)
+{
+    return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
+}
+
 #define float64_zero make_float64(0)
 
 #ifdef FLOATX80
@@ -384,6 +414,21 @@ INLINE floatx80 floatx80_chs(floatx80 a)
     return a;
 }
 
+INLINE int floatx80_is_infinity(floatx80 a)
+{
+    return (a.high & 0x7fff) == 0x7fff && a.low == 0;
+}
+
+INLINE int floatx80_is_neg(floatx80 a)
+{
+    return a.high >> 15;
+}
+
+INLINE int floatx80_is_zero(floatx80 a)
+{
+    return (a.high & 0x7fff) == 0 && a.low == 0;
+}
+
 #endif
 
 #ifdef FLOAT128
@@ -435,6 +480,21 @@ INLINE float128 float128_chs(float128 a)
     return a;
 }
 
+INLINE int float128_is_infinity(float128 a)
+{
+    return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
+}
+
+INLINE int float128_is_neg(float128 a)
+{
+    return a.high >> 63;
+}
+
+INLINE int float128_is_zero(float128 a)
+{
+    return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
+}
+
 #endif
 
 #else /* CONFIG_SOFTFLOAT */