Optimize libm

[thirdparty/glibc.git] / math / w_remainderf.c

diff --git a/math/w_remainderf.c b/math/w_remainderf.c
index 39d01b3fa0e6127602a20fe39411070217927ac8..9bddf6f619da97357aa338f27f11f488297aed36 100644 (file)
--- a/math/w_remainderf.c
+++ b/math/w_remainderf.c
@@ -1,47 +1,35 @@
-/* w_remainderf.c -- float version of w_remainder.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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.
 
-/*
- * ====================================================
- * 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.
- * ====================================================
- */
+   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.
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: w_remainderf.c,v 1.3 1995/05/10 20:49:46 jtc Exp $";
-#endif
+   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.
 
-/*
- * wrapper remainderf(x,p)
- */
+   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.  */
 
 #include <math.h>
 #include <math_private.h>
 
-#ifdef __STDC__
-       float __remainderf(float x, float y)    /* wrapper remainder */
-#else
-       float __remainderf(x,y)                 /* wrapper remainder */
-       float x,y;
-#endif
+
+/* wrapper remainderf */
+float
+__remainderf (float x, float y)
 {
-#ifdef _IEEE_LIBM
-       return __ieee754_remainderf(x,y);
-#else
-       float z;
-       z = __ieee754_remainderf(x,y);
-       if(_LIB_VERSION == _IEEE_ || __isnanf(y) || __isnanf(x)) return z;
-       if(y==(float)0.0 || __isinf_nsf(x))
-           /* remainder(x,0) */
-           return (float)__kernel_standard((double)x,(double)y,128);
-       else
-           return z;
-#endif
+  if (((__builtin_expect (y == 0.0f, 0) && ! __isnanf (x))
+       || (__builtin_expect (__isinf_nsf (x), 0) && ! __isnanf (y)))
+      && _LIB_VERSION != _IEEE_)
+    return __kernel_standard_f (x, y, 128); /* remainder domain */
+
+  return __ieee754_remainderf (x, y);
 }
 weak_alias (__remainderf, remainderf)