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authorUlrich Drepper <drepper@gmail.com>2011-10-12 11:27:51 -0400
committerUlrich Drepper <drepper@gmail.com>2011-10-12 11:27:51 -0400
commit0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch)
treef9d26c8abc0de39d18d4c13e70f6022cdc6b461f /math/w_exp10f.c
parenta843a204a3e8a0dd53584dad3668771abaec84ac (diff)
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Optimize libm
libm is now somewhat integrated with gcc's -ffinite-math-only option and lots of the wrapper functions have been optimized.
Diffstat (limited to 'math/w_exp10f.c')
-rw-r--r--math/w_exp10f.c61
1 files changed, 28 insertions, 33 deletions
diff --git a/math/w_exp10f.c b/math/w_exp10f.c
index dcc8dc768e..6fd52f9a3e 100644
--- a/math/w_exp10f.c
+++ b/math/w_exp10f.c
@@ -1,45 +1,40 @@
-/* w_exp10f.c -- float version of w_exp10.c.
- * Conversion to exp10 by Ulrich Drepper <drepper@cygnus.com>.
- */
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
-/*
- * ====================================================
- * 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 expf10(x)
+ * wrapper exp10f(x)
*/
#include <math.h>
#include <math_private.h>
-#ifdef __STDC__
- float __exp10f(float x) /* wrapper exp10f */
-#else
- float __exp10f(x) /* wrapper exp10f */
- float x;
-#endif
+float
+__exp10f (float x)
{
-#ifdef _IEEE_LIBM
- return __ieee754_exp10f(x);
-#else
- float z;
- z = __ieee754_exp10f(x);
- if(_LIB_VERSION == _IEEE_) return z;
- if(!__finitef(z) && __finitef(x)) {
- /* exp10f overflow (146) if x > 0, underflow (147) if x < 0. */
- return (float)__kernel_standard((double) x, (double) x,
- 146+!!__signbitf(x));
- }
- return z;
-#endif
+ float z = __ieee754_exp10f (x);
+ if (__builtin_expect (!__finitef (z), 0)
+ && __finitef (x) && _LIB_VERSION != _IEEE_)
+ /* exp10f overflow (146) if x > 0, underflow (147) if x < 0. */
+ return __kernel_standard_f (x, x, 146 + !!__signbitf (x));
+
+ return z;
}
weak_alias (__exp10f, exp10f)
strong_alias (__exp10f, __pow10f)