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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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11
ChangeLog
View File

@ -1,3 +1,14 @@
2000-12-04 Ulrich Drepper <drepper@redhat.com>
* 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>
* configure.in: Define HAVE_ASM_GLOBAL_DOT_NAME for AIX.

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;

2
math/w_scalb.c
View File

@ -45,7 +45,7 @@ static char rcsid[] = "$NetBSD: w_scalb.c,v 1.6 1995/05/10 20:49:48 jtc Exp $";
#else
double z;
z = __ieee754_scalb(x,fn);
if(_LIB_VERSION == _IEEE_) return z;
if(_LIB_VERSION != _SVID_) return z;
if(!(__finite(z)||__isnan(z))&&__finite(x)) {
return __kernel_standard(x,(double)fn,32); /* scalb overflow */
}

2
math/w_scalbf.c
View File

@ -48,7 +48,7 @@ static char rcsid[] = "$NetBSD: w_scalbf.c,v 1.3 1995/05/10 20:49:50 jtc Exp $";
#else
float z;
z = __ieee754_scalbf(x,fn);
if(_LIB_VERSION == _IEEE_) return z;
if(_LIB_VERSION != _SVID_) return z;
if(!(__finitef(z)||__isnanf(z))&&__finitef(x)) {
/* scalbf overflow */
return (float)__kernel_standard((double)x,(double)fn,132);

2
math/w_scalbl.c
View File

@ -49,7 +49,7 @@ static char rcsid[] = "$NetBSD: $";
#else
long double z;
z = __ieee754_scalbl(x,fn);
if(_LIB_VERSION == _IEEE_) return z;
if(_LIB_VERSION != _SVID_) return z;
if(!(__finitel(z)||__isnanl(z))&&__finitel(x)) {
return __kernel_standard(x,(double)fn,232); /* scalb overflow */
}

6
sysdeps/i386/fpu/e_scalb.S
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@ -50,7 +50,7 @@ ENTRY(__ieee754_scalb)
fnstsw
andl $0x4500, %eax
cmpl $0x0100, %eax
je 2f
je 3f
fld %st(1)
frndint
fcomp %st(2)
@ -91,4 +91,8 @@ ENTRY(__ieee754_scalb)
#endif
fldl MO(nan)
ret
/* The first parameter is a NaN. Return it. */
3: fstp %st(1)
ret
END(__ieee754_scalb)

6
sysdeps/i386/fpu/e_scalbf.S
View File

@ -52,7 +52,7 @@ ENTRY(__ieee754_scalbf)
fnstsw
andl $0x4500, %eax
cmpl $0x0100, %eax
je 2f
je 3f
fld %st(1)
frndint
fcomp %st(2)
@ -93,4 +93,8 @@ ENTRY(__ieee754_scalbf)
#endif
fldl MO(nan)
ret
/* The first parameter is a NaN. Return it. */
3: fstp %st(1)
ret
END(__ieee754_scalbf)

6
sysdeps/i386/fpu/e_scalbl.S
View File

@ -52,7 +52,7 @@ ENTRY(__ieee754_scalbl)
fnstsw
andl $0x4500, %eax
cmpl $0x0100, %eax
je 2f
je 3f
fld %st(1)
frndint
fcomp %st(2)
@ -93,4 +93,8 @@ ENTRY(__ieee754_scalbl)
#endif
fldl MO(nan)
ret
/* The first parameter is a NaN. Return it. */
3: fstp %st(1)
ret
END(__ieee754_scalbl)