X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=tests%2Ftest-frexpl.c;h=f1446fe07d4663a6110847474372f3dcb1c42611;hb=fb7fde6f658ac18b7ab7ca61dca9a290cc8c3348;hp=447c3b9a7a98dd89a411be78465e33dca21c144b;hpb=cdaeb6bb213d6042df46e0b3584718ede9f18511;p=gnulib.git

diff --git a/tests/test-frexpl.c b/tests/test-frexpl.c
index 447c3b9a7..f1446fe07 100644
--- a/tests/test-frexpl.c
+++ b/tests/test-frexpl.c
@@ -22,11 +22,35 @@
 #include <math.h>
 
 #include <float.h>
+#include <stdio.h>
 #include <stdlib.h>
 
 #include "fpucw.h"
-
-#define ASSERT(expr) if (!(expr)) abort ();
+#include "isnanl-nolibm.h"
+
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
+
+/* On MIPS IRIX machines, LDBL_MIN_EXP is -1021, but the smallest reliable
+   exponent for 'long double' is -964.  Similarly, on PowerPC machines,
+   LDBL_MIN_EXP is -1021, but the smallest reliable exponent for 'long double'
+   is -968.  For exponents below that, the precision may be truncated to the
+   precision used for 'double'.  */
+#ifdef __sgi
+# define MIN_NORMAL_EXP (LDBL_MIN_EXP + 57)
+#elif defined __ppc || defined __ppc__ || defined __powerpc || defined __powerpc__
+# define MIN_NORMAL_EXP (LDBL_MIN_EXP + 53)
+#else
+# define MIN_NORMAL_EXP LDBL_MIN_EXP
+#endif
 
 static long double
 my_ldexp (long double x, int d)
@@ -52,7 +76,7 @@ main ()
     long double mantissa;
     x = 0.0L / 0.0L;
     mantissa = frexpl (x, &exp);
-    ASSERT (mantissa != mantissa);
+    ASSERT (isnanl (mantissa));
   }
 
   { /* Positive infinity.  */
@@ -78,6 +102,7 @@ main ()
     mantissa = frexpl (x, &exp);
     ASSERT (exp == 0);
     ASSERT (mantissa == x);
+    ASSERT (!signbit (mantissa));
   }
 
   { /* Negative zero.  */
@@ -87,6 +112,7 @@ main ()
     mantissa = frexpl (x, &exp);
     ASSERT (exp == 0);
     ASSERT (mantissa == x);
+    ASSERT (signbit (mantissa));
   }
 
   for (i = 1, x = 1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
@@ -96,7 +122,7 @@ main ()
       ASSERT (exp == i);
       ASSERT (mantissa == 0.5L);
     }
-  for (i = 1, x = 1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+  for (i = 1, x = 1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
     {
       int exp = -9999;
       long double mantissa = frexpl (x, &exp);
@@ -118,7 +144,7 @@ main ()
       ASSERT (exp == i);
       ASSERT (mantissa == -0.5L);
     }
-  for (i = 1, x = -1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+  for (i = 1, x = -1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
     {
       int exp = -9999;
       long double mantissa = frexpl (x, &exp);
@@ -140,7 +166,7 @@ main ()
       ASSERT (exp == i);
       ASSERT (mantissa == 0.505L);
     }
-  for (i = 1, x = 1.01L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+  for (i = 1, x = 1.01L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
     {
       int exp = -9999;
       long double mantissa = frexpl (x, &exp);
@@ -164,7 +190,7 @@ main ()
       ASSERT (exp == i);
       ASSERT (mantissa == 0.866025L);
     }
-  for (i = 1, x = 1.73205L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+  for (i = 1, x = 1.73205L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
     {
       int exp = -9999;
       long double mantissa = frexpl (x, &exp);