implement in terms of fpclassify()

4 files changed, 4 insertions, 21 deletions

diff --git a/src/math/isfinite.c b/src/math/isfinite.c
index dab650c0..04978b68 100644
--- a/src/math/isfinite.c
+++ b/src/math/isfinite.c
@@ -1,10 +1,6 @@
 #include <math.h>
-                                int __isfinitef(float x);
-                               int __isfinited(double x);
-                          int __isfinitel(long double x);
 
-#define isfinite(x)        ((sizeof (x) == sizeof (float)) ? __isfinitef(x) : \
-	(sizeof (x) == sizeof (double)) ? __isfinited(x) :  __isfinitel(x))
+#define isfinite(x)                              (fp_classify(x) != FP_INFINITE)
 
 /*
 STDC(199901)
diff --git a/src/math/isinf.c b/src/math/isinf.c
index 9139197f..1a6b00ff 100644
--- a/src/math/isinf.c
+++ b/src/math/isinf.c
@@ -1,10 +1,6 @@
 #include <math.h>
-                                 int __isinff(float x);
-                                int __isinfd(double x);
-                           int __isinfl(long double x);
 
-#define isinf(x)              ((sizeof (x) == sizeof (float)) ? __isinff(x) : \
-	(sizeof (x) == sizeof (double)) ? __isinfd(x) : __isinfl(x))
+#define isinf(x)                                  (fpclassify(x) == FP_INFINITE)
 
 /*
 STDC(199901)
diff --git a/src/math/isnan.c b/src/math/isnan.c
index 963b7021..e3e0160a 100644
--- a/src/math/isnan.c
+++ b/src/math/isnan.c
@@ -1,10 +1,5 @@
 #include <math.h>
-                             int __isnanf(float x);
-                            int __isnand(double x);
-                       int __isnanl(long double x);
-
-#define isnan(x)              ((sizeof (x) == sizeof (float)) ? __isnanf(x) : \
-	(sizeof (x) == sizeof (double)) ? __isnand(x) : __isnanl(x))
+#define isnan(x)                                       (fpclassify(x) == FP_NAN)
 
 /*
 STDC(199901)
diff --git a/src/math/isnormal.c b/src/math/isnormal.c
index 5702fc94..868c7ea2 100644
--- a/src/math/isnormal.c
+++ b/src/math/isnormal.c
@@ -1,10 +1,6 @@
 #include <math.h>
-                                    int __isnormalf(float x);
-                                   int __isnormald(double x);
-                              int __isnormall(long double x);
 
-#define isnormal(x)        ((sizeof (x) == sizeof (float)) ? __isnormalf(x) : \
-	(sizeof (x) == sizeof (double)) ? __isnormald(x) : __isnormall(x))
+#define isnormal(x)                                 (fpclassify(x) == FP_NORMAL)
 
 /*
 STDC(199901)