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* 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>
This commit is contained in:
Ulrich Drepper
2000-12-05 06:36:53 +00:00
parent 2aa1543085
commit 6d0c49145e
8 changed files with 76 additions and 8 deletions
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49
math/test-misc.c
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@ -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;