[Qemu-devel] [6050] fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()

[Aurelien Jarno]

Revision: 6050
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6050
Author:   aurel32
Date:     2008-12-15 17:14:20 +0000 (Mon, 15 Dec 2008)

Log Message:
-----------
fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()

Signed-off-by: Aurelien Jarno <address@hidden>

Modified Paths:
--------------
    trunk/fpu/softfloat-native.h
    trunk/fpu/softfloat.h

Modified: trunk/fpu/softfloat-native.h
===================================================================
--- trunk/fpu/softfloat-native.h        2008-12-15 17:14:12 UTC (rev 6049)
+++ trunk/fpu/softfloat-native.h        2008-12-15 17:14:20 UTC (rev 6050)
@@ -258,6 +258,21 @@
     return -a;
 }
 
+INLINE float32 float32_is_infinity(float32 a)
+{
+    return fpclassify(a) == FP_INFINITE;
+}
+
+INLINE float32 float32_is_neg(float32 a)
+{
+    return a < 0.0;
+}
+
+INLINE float32 float32_is_zero(float32 a)
+{
+    return fpclassify(a) == FP_ZERO;
+}
+
 INLINE float32 float32_scalbn(float32 a, int n)
 {
     return scalbnf(a, n);
@@ -350,6 +365,21 @@
     return -a;
 }
 
+INLINE float64 float64_is_infinity(float64 a)
+{
+    return fpclassify(a) == FP_INFINITE;
+}
+
+INLINE float64 float64_is_neg(float64 a)
+{
+    return a < 0.0;
+}
+
+INLINE float64 float64_is_zero(float64 a)
+{
+    return fpclassify(a) == FP_ZERO;
+}
+
 INLINE float64 float64_scalbn(float64 a, int n)
 {
     return scalbn(a, n);
@@ -437,6 +467,21 @@
     return -a;
 }
 
+INLINE floatx80 floatx80_is_infinity(floatx80 a)
+{
+    return fpclassify(a) == FP_INFINITE;
+}
+
+INLINE floatx80 floatx80_is_neg(floatx80 a)
+{
+    return a < 0.0;
+}
+
+INLINE floatx80 floatx80_is_zero(floatx80 a)
+{
+    return fpclassify(a) == FP_ZERO;
+}
+
 INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
 {
     return scalbnl(a, n);

Modified: trunk/fpu/softfloat.h
===================================================================
--- trunk/fpu/softfloat.h       2008-12-15 17:14:12 UTC (rev 6049)
+++ trunk/fpu/softfloat.h       2008-12-15 17:14:20 UTC (rev 6050)
@@ -281,6 +281,21 @@
     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 @@
     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 @@
     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 @@
     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 */