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authorUlrich Drepper <drepper@redhat.com>1997-03-17 04:09:18 +0000
committerUlrich Drepper <drepper@redhat.com>1997-03-17 04:09:18 +0000
commitcf2b29bfe0ec906d455d2d9bfdbc1478de5ea90f (patch)
treee404ab18b796c899634bcb69cf25b6ed4d35a983
parent98e994340ad8990c5bf95a9736be1b41d7440f22 (diff)
Distinguish error cases for x is +0 or -0.
-rw-r--r--sysdeps/libm-ieee754/w_pow.c5
-rw-r--r--sysdeps/libm-ieee754/w_powf.c17
-rw-r--r--sysdeps/libm-ieee754/w_powl.c5
3 files changed, 18 insertions, 9 deletions
diff --git a/sysdeps/libm-ieee754/w_pow.c b/sysdeps/libm-ieee754/w_pow.c
index ea19e1f554..1711d71bda 100644
--- a/sysdeps/libm-ieee754/w_pow.c
+++ b/sysdeps/libm-ieee754/w_pow.c
@@ -43,7 +43,10 @@
if(y==0.0)
return __kernel_standard(x,y,20); /* pow(0.0,0.0) */
if(__finite(y)&&y<0.0)
- return __kernel_standard(x,y,23); /* pow(0.0,negative) */
+ if (signbit (x) && signbit (z))
+ return __kernel_standard(x,y,23); /* pow(-0.0,negative) */
+ else
+ return __kernel_standard(x,y,43); /* pow(+0.0,negative) */
return z;
}
if(!__finite(z)) {
diff --git a/sysdeps/libm-ieee754/w_powf.c b/sysdeps/libm-ieee754/w_powf.c
index 3f9d5c8d5f..0b20822be8 100644
--- a/sysdeps/libm-ieee754/w_powf.c
+++ b/sysdeps/libm-ieee754/w_powf.c
@@ -8,7 +8,7 @@
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
+ * software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
@@ -17,7 +17,7 @@
static char rcsid[] = "$NetBSD: w_powf.c,v 1.3 1995/05/10 20:49:41 jtc Exp $";
#endif
-/*
+/*
* wrapper powf(x,y) return x**y
*/
@@ -39,19 +39,22 @@ static char rcsid[] = "$NetBSD: w_powf.c,v 1.3 1995/05/10 20:49:41 jtc Exp $";
z=__ieee754_powf(x,y);
if(_LIB_VERSION == _IEEE_|| __isnanf(y)) return z;
if(__isnanf(x)) {
- if(y==(float)0.0)
+ if(y==(float)0.0)
/* powf(NaN,0.0) */
return (float)__kernel_standard((double)x,(double)y,142);
- else
+ else
return z;
}
- if(x==(float)0.0){
+ if(x==(float)0.0){
if(y==(float)0.0)
/* powf(0.0,0.0) */
return (float)__kernel_standard((double)x,(double)y,120);
if(__finitef(y)&&y<(float)0.0)
+ if (signbit (x) && signbit (z))
/* powf(0.0,negative) */
return (float)__kernel_standard((double)x,(double)y,123);
+ else
+ return (float)__kernel_standard((double)x,(double)y,143);
return z;
}
if(!__finitef(z)) {
@@ -59,11 +62,11 @@ static char rcsid[] = "$NetBSD: w_powf.c,v 1.3 1995/05/10 20:49:41 jtc Exp $";
if(__isnanf(z))
/* powf neg**non-int */
return (float)__kernel_standard((double)x,(double)y,124);
- else
+ else
/* powf overflow */
return (float)__kernel_standard((double)x,(double)y,121);
}
- }
+ }
if(z==(float)0.0&&__finitef(x)&&__finitef(y))
/* powf underflow */
return (float)__kernel_standard((double)x,(double)y,122);
diff --git a/sysdeps/libm-ieee754/w_powl.c b/sysdeps/libm-ieee754/w_powl.c
index 019664e0f1..aea572d905 100644
--- a/sysdeps/libm-ieee754/w_powl.c
+++ b/sysdeps/libm-ieee754/w_powl.c
@@ -45,7 +45,10 @@
if(y==0.0)
return __kernel_standard(x,y,220); /* pow(0.0,0.0) */
if(__finite(y)&&y<0.0)
- return __kernel_standard(x,y,223); /* pow(0.0,negative) */
+ if (signbit (x) && signbit (z))
+ return __kernel_standard(x,y,223); /* pow(-0.0,negative) */
+ else
+ return __kernel_standard(x,y,243); /* pow(+0.0,negative) */
return z;
}
if(!__finitel(z)) {