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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_j1.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_j1.c')
-rw-r--r--math/w_j1.c105
1 files changed, 46 insertions, 59 deletions
diff --git a/math/w_j1.c b/math/w_j1.c
index 7bb3208..09cacb8 100644
--- a/math/w_j1.c
+++ b/math/w_j1.c
@@ -1,76 +1,63 @@
-/* @(#)w_j1.c 5.1 93/09/24 */
-/*
- * ====================================================
- * 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.
- * ====================================================
- */
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: w_j1.c,v 1.6 1995/05/10 20:49:15 jtc Exp $";
-#endif
+ 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.
-/*
- * wrapper of j1,y1
- */
+ 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 <fenv.h>
#include <math.h>
#include <math_private.h>
-#ifdef __STDC__
- double j1(double x) /* wrapper j1 */
-#else
- double j1(x) /* wrapper j1 */
- double x;
-#endif
+
+/* wrapper j1 */
+double
+j1 (double x)
{
-#ifdef _IEEE_LIBM
- return __ieee754_j1(x);
-#else
- double z;
- z = __ieee754_j1(x);
- if(_LIB_VERSION == _IEEE_ || __isnan(x) ) return z;
- if(fabs(x)>X_TLOSS) {
- return __kernel_standard(x,x,36); /* j1(|x|>X_TLOSS) */
- } else
- return z;
-#endif
+ if (__builtin_expect (fabs (x) > X_TLOSS, 0) && _LIB_VERSION != _IEEE_)
+ /* j1(|x|>X_TLOSS) */
+ return __kernel_standard (x, x, 36);
+
+ return __ieee754_j1 (x);
}
#ifdef NO_LONG_DOUBLE
strong_alias (j1, j1l)
#endif
-#ifdef __STDC__
- double y1(double x) /* wrapper y1 */
-#else
- double y1(x) /* wrapper y1 */
- double x;
-#endif
+/* wrapper y1 */
+double
+y1 (double x)
{
-#ifdef _IEEE_LIBM
- return __ieee754_y1(x);
-#else
- double z;
- z = __ieee754_y1(x);
- if(_LIB_VERSION == _IEEE_ || __isnan(x) ) return z;
- if(x <= 0.0){
- if(x==0.0)
- /* d= -one/(x-x); */
- return __kernel_standard(x,x,10);
- else
- /* d = zero/(x-x); */
- return __kernel_standard(x,x,11);
- }
- if(x>X_TLOSS) {
- return __kernel_standard(x,x,37); /* y1(x>X_TLOSS) */
- } else
- return z;
-#endif
+ if (__builtin_expect (x <= 0.0 || x > X_TLOSS, 0) && _LIB_VERSION != _IEEE_)
+ {
+ if (x < 0.0)
+ {
+ /* d = zero/(x-x) */
+ feraiseexcept (FE_INVALID);
+ return __kernel_standard (x, x, 11);
+ }
+ else if (x == 0.0)
+ /* d = -one/(x-x) */
+ return __kernel_standard (x, x, 10);
+ else
+ /* y1(x>X_TLOSS) */
+ return __kernel_standard (x, x, 37);
+ }
+
+ return __ieee754_y1 (x);
}
#ifdef NO_LONG_DOUBLE
strong_alias (y1, y1l)