aboutsummaryrefslogtreecommitdiff
path: root/math/w_pow.c
diff options
context:
space:
mode:
authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /math/w_pow.c
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
downloadglibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.zip
glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.tar.gz
glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.tar.bz2
2.5-18.1
Diffstat (limited to 'math/w_pow.c')
-rw-r--r--math/w_pow.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/math/w_pow.c b/math/w_pow.c
new file mode 100644
index 0000000..707cffc
--- /dev/null
+++ b/math/w_pow.c
@@ -0,0 +1,70 @@
+
+
+/* @(#)w_pow.c 5.2 93/10/01 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * wrapper pow(x,y) return x**y
+ */
+
+#include <math.h>
+#include "math_private.h"
+
+
+#ifdef __STDC__
+ double __pow(double x, double y) /* wrapper pow */
+#else
+ double __pow(x,y) /* wrapper pow */
+ double x,y;
+#endif
+{
+#ifdef _IEEE_LIBM
+ return __ieee754_pow(x,y);
+#else
+ double z;
+ z=__ieee754_pow(x,y);
+ if(_LIB_VERSION == _IEEE_|| __isnan(y)) return z;
+ if(__isnan(x)) {
+ if(y==0.0)
+ return __kernel_standard(x,y,42); /* pow(NaN,0.0) */
+ else
+ return z;
+ }
+ if(x==0.0) {
+ if(y==0.0)
+ return __kernel_standard(x,y,20); /* pow(0.0,0.0) */
+ if(__finite(y)&&y<0.0) {
+ 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)) {
+ if(__finite(x)&&__finite(y)) {
+ if(__isnan(z))
+ return __kernel_standard(x,y,24); /* pow neg**non-int */
+ else
+ return __kernel_standard(x,y,21); /* pow overflow */
+ }
+ }
+ if(z==0.0&&__finite(x)&&__finite(y))
+ return __kernel_standard(x,y,22); /* pow underflow */
+ return z;
+#endif
+}
+weak_alias (__pow, pow)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__pow, __powl)
+weak_alias (__pow, powl)
+#endif