X-Git-Url: http://nsz.repo.hu/git/?p=libm;a=blobdiff_plain;f=include%2Fmath.h;h=143dba37360627b16a8f194a0b0acc7f1ee200e7;hp=67810a0830f438fed4076dc111e4f6049465077d;hb=ac61b47cfea9e60d895816cac7fc8ca3d0b42fd3;hpb=0498709e07bf9dd0546a61220cd2a27fcd186ce0

diff --git a/include/math.h b/include/math.h
index 67810a0..143dba3 100644
--- a/include/math.h
+++ b/include/math.h
@@ -12,7 +12,9 @@ extern "C" {
 #define __NEED___uint64_t
 #include <bits/alltypes.h>
 
-#define __MAKE_FLOAT(i) (((union { int __i; float __f; }){ .__i = i }).__f)
+#define __MAKE_FLOAT(i) (((union { __uint32_t __i; float __f; }){ i }).__f)
+#define __FLOAT_BITS(f) (((union { float __f; __uint32_t __i; }){ f }).__i)
+#define __DOUBLE_BITS(f) (((union { double __f; __uint64_t __i; }){ f }).__i)
 
 #define NAN       __MAKE_FLOAT(0x7fc00000)
 #define INFINITY  __MAKE_FLOAT(0x7f800000)
@@ -21,8 +23,6 @@ extern "C" {
 #define HUGE_VAL  ((double)INFINITY)
 #define HUGE_VALL ((long double)INFINITY)
 
-#define MAXFLOAT  __MAKE_FLOAT(0x7f7fffff)
-
 #define MATH_ERRNO  1
 #define MATH_EXCEPT 2
 #define math_errhandling 2
@@ -45,18 +45,33 @@ int __fpclassifyl(long double);
 	sizeof(x) == sizeof(double) ? __fpclassify(x) : \
 	__fpclassifyl(x) )
 
-#define isinf(x)    (fpclassify(x) == FP_INFINITE)
-#define isnan(x)    (fpclassify(x) == FP_NAN)
-#define isnormal(x) (fpclassify(x) == FP_NORMAL)
-#define isfinite(x) (fpclassify(x) > FP_INFINITE)
+#define isinf(x) ( \
+	sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) == 0x7f800000 : \
+	sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & ~((__uint64_t)1<<63)) == (__uint64_t)0x7ff<<52 : \
+	__fpclassifyl(x) == FP_INFINITE)
+
+#define isnan(x) ( \
+	sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) > 0x7f800000 : \
+	sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & ~((__uint64_t)1<<63)) > (__uint64_t)0x7ff<<52 : \
+	__fpclassifyl(x) == FP_NAN)
+
+#define isnormal(x) ( \
+	sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x)+0x00800000 & 0x7fffffff) >= 0x01000000 : \
+	sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x)+((__uint64_t)1<<52) & ~((__uint64_t)1<<63)) >= (__uint64_t)1<<53 : \
+	__fpclassifyl(x) == FP_NORMAL)
+
+#define isfinite(x) ( \
+	sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) < 0x7f800000 : \
+	sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & ~((__uint64_t)1<<63)) < (__uint64_t)0x7ff<<52 : \
+	__fpclassifyl(x) > FP_INFINITE)
 
 int __signbit(double);
 int __signbitf(float);
 int __signbitl(long double);
 
 #define signbit(x) ( \
-	sizeof(x) == sizeof(float) ? __signbitf(x) : \
-	sizeof(x) == sizeof(double) ? __signbit(x) : \
+	sizeof(x) == sizeof(float) ? __FLOAT_BITS(x) & 0x80000000 : \
+	sizeof(x) == sizeof(double) ? __DOUBLE_BITS(x) & (__uint64_t)1<<63 : \
 	__signbitl(x) )
 
 #define isunordered(x,y) (isnan((x)) ? ((void)(y),1) : isnan((y)))
@@ -305,6 +320,7 @@ float       truncf(float);
 long double truncl(long double);
 
 #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+#define MAXFLOAT        __MAKE_FLOAT(0x7f7fffff)
 #define M_E             2.7182818284590452354   /* e */
 #define M_LOG2E         1.4426950408889634074   /* log_2 e */
 #define M_LOG10E        0.43429448190325182765  /* log_10 e */