2362N/A * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 0N/A/* __ieee754_acosh(x) 0N/A * acosh(x) = log [ x + sqrt(x*x-1) ] 0N/A * acosh(x) := log(x)+ln2, if x is large; else 0N/A * acosh(x) := log(2x-1/(sqrt(x*x-1)+x)) if x>2; else 0N/A * acosh(x) := log1p(t+sqrt(2.0*t+t*t)); where t=x-1. 0N/A * acosh(x) is NaN with signal if x<1. 0N/A * acosh(NaN) is NaN without signal. 0N/Aln2 =
6.93147180559945286227e-01;
/* 0x3FE62E42, 0xFEFA39EF */ 0N/A if(
hx<
0x3ff00000) {
/* x < 1 */ 0N/A }
else if(
hx >=
0x41b00000) {
/* x > 2**28 */ 0N/A if(
hx >=
0x7ff00000) {
/* x is inf of NaN */ 0N/A return 0.0;
/* acosh(1) = 0 */ 0N/A }
else if (
hx >
0x40000000) {
/* 2**28 > x > 2 */ 0N/A }
else {
/* 1<x<2 */