--- a/jdk/src/share/native/java/lang/fdlibm/src/e_acosh.c	Fri Aug 12 09:48:09 2011 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,77 +0,0 @@
-
-/*
- * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code 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 General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-/* __ieee754_acosh(x)
- * Method :
- *      Based on
- *              acosh(x) = log [ x + sqrt(x*x-1) ]
- *      we have
- *              acosh(x) := log(x)+ln2, if x is large; else
- *              acosh(x) := log(2x-1/(sqrt(x*x-1)+x)) if x>2; else
- *              acosh(x) := log1p(t+sqrt(2.0*t+t*t)); where t=x-1.
- *
- * Special cases:
- *      acosh(x) is NaN with signal if x<1.
- *      acosh(NaN) is NaN without signal.
- */
-
-#include "fdlibm.h"
-
-#ifdef __STDC__
-static const double
-#else
-static double
-#endif
-one     = 1.0,
-ln2     = 6.93147180559945286227e-01;  /* 0x3FE62E42, 0xFEFA39EF */
-
-#ifdef __STDC__
-        double __ieee754_acosh(double x)
-#else
-        double __ieee754_acosh(x)
-        double x;
-#endif
-{
-        double t;
-        int hx;
-        hx = __HI(x);
-        if(hx<0x3ff00000) {             /* x < 1 */
-            return (x-x)/(x-x);
-        } else if(hx >=0x41b00000) {    /* x > 2**28 */
-            if(hx >=0x7ff00000) {       /* x is inf of NaN */
-                return x+x;
-            } else
-                return __ieee754_log(x)+ln2;    /* acosh(huge)=log(2x) */
-        } else if(((hx-0x3ff00000)|__LO(x))==0) {
-            return 0.0;                 /* acosh(1) = 0 */
-        } else if (hx > 0x40000000) {   /* 2**28 > x > 2 */
-            t=x*x;
-            return __ieee754_log(2.0*x-one/(x+sqrt(t-one)));
-        } else {                        /* 1<x<2 */
-            t = x-one;
-            return log1p(t+sqrt(2.0*t+t*t));
-        }
-}