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authorUlrich Drepper <drepper@redhat.com>2000-12-05 06:36:53 +0000
committerUlrich Drepper <drepper@redhat.com>2000-12-05 06:36:53 +0000
commit6d0c49145e818f4f8417b61ddbe22c957825d5e9 (patch)
tree00927b9a1699f64c19e04832f4219489658b1c40 /math/test-misc.c
parent2aa15430850362f50b069e21598e9acc625d4c27 (diff)
downloadglibc-6d0c49145e818f4f8417b61ddbe22c957825d5e9.tar.gz
Update.
* sysdeps/i386/fpu/e_scalb.S: Handle NaN as first parameter correctly. * sysdeps/i386/fpu/e_scalbf.S: Likewise. * sysdeps/i386/fpu/e_scalbl.S: Likewise. * math/w_scalb.c: Don't use matherr except in SVID mode. * math/w_scalbf.c: Likewise. * math/w_scalbl.c: Likewise. * math/test-misc.c: Add test for NaN and scalbl. Reported by Fred J. Tydeman <tydeman@tybor.com>. 2000-12-04 Ulrich Drepper <drepper@redhat.com>
Diffstat (limited to 'math/test-misc.c')
-rw-r--r--math/test-misc.c49
1 files changed, 47 insertions, 2 deletions
diff --git a/math/test-misc.c b/math/test-misc.c
index 098695f73f..514035554c 100644
--- a/math/test-misc.c
+++ b/math/test-misc.c
@@ -19,6 +19,7 @@
#include <math.h>
#include <stdio.h>
+#include <string.h>
int
@@ -75,6 +76,26 @@ main (void)
}
}
# endif
+
+#if 0
+ {
+ int e;
+ long double r = frexpl (LDBL_MIN * LDBL_EPSILON, &e);
+
+ if (r != 0.5)
+ {
+ printf ("frexpl (LDBL_MIN * LDBL_EPSILON, ...): mantissa wrong: %Lg\n",
+ r);
+ result = 1;
+ }
+ else if (e != -16444)
+ {
+ printf ("frexpl (LDBL_MIN * LDBL_EPSILON, ...): exponent wrong: %d\n",
+ e);
+ result = 1;
+ }
+ }
+#endif
#endif
{
@@ -120,8 +141,9 @@ main (void)
}
if (fpclassify (nextafterl (LDBL_MIN, LDBL_MIN / 2.0)) != FP_SUBNORMAL)
{
- printf ("fpclassify (LDBL_MIN-epsilon) failed: %d\n",
- fpclassify (nextafterl (LDBL_MIN, LDBL_MIN / 2.0)));
+ printf ("fpclassify (LDBL_MIN-epsilon) failed: %d (%Lg)\n",
+ fpclassify (nextafterl (LDBL_MIN, LDBL_MIN / 2.0)),
+ nextafterl (LDBL_MIN, LDBL_MIN / 2.0));
result = 1;
}
#endif
@@ -161,6 +183,29 @@ main (void)
result = 1;
}
}
+
+ /* Special NaNs in x86 long double. Test for scalbl. */
+ {
+ union
+ {
+ char b[10];
+ long double d;
+ } u =
+ { .b = { 0, 1, 0, 0, 0, 0, 0, 0xc0, 0xff, 0x7f } };
+ long double r;
+
+ r = scalbl (u.d, 0.0);
+ if (!isnan (r))
+ {
+ puts ("scalbl(NaN, 0) does not return NaN");
+ result = 1;
+ }
+ else if (memcmp (&r, &u.d, sizeof (double)) != 0)
+ {
+ puts ("scalbl(NaN, 0) does not return the same NaN");
+ result = 1;
+ }
+ }
#endif
return result;