8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse
2025-09-18 10:04:42 +02:00 · 2017-09-12 19:03:39 +02:00 · 2017-09-12 19:03:39 +02:00 · 3789983e89
commit 3789983e89
parent 270fe13182
56923 changed files with 3 additions and 15727 deletions
--- a/src/java.base/share/native/libfdlibm/s_tanh.c
+++ b/src/java.base/share/native/libfdlibm/s_tanh.c
@ -0,0 +1,94 @@
+/*
+ * 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.
+ */
+
+/* Tanh(x)
+ * Return the Hyperbolic Tangent of x
+ *
+ * Method :
+ *                                     x    -x
+ *                                    e  - e
+ *      0. tanh(x) is defined to be -----------
+ *                                     x    -x
+ *                                    e  + e
+ *      1. reduce x to non-negative by tanh(-x) = -tanh(x).
+ *      2.  0      <= x <= 2**-55 : tanh(x) := x*(one+x)
+ *                                              -t
+ *          2**-55 <  x <=  1     : tanh(x) := -----; t = expm1(-2x)
+ *                                             t + 2
+ *                                                   2
+ *          1      <= x <=  22.0  : tanh(x) := 1-  ----- ; t=expm1(2x)
+ *                                                 t + 2
+ *          22.0   <  x <= INF    : tanh(x) := 1.
+ *
+ * Special cases:
+ *      tanh(NaN) is NaN;
+ *      only tanh(0)=0 is exact for finite argument.
+ */
+
+#include "fdlibm.h"
+
+#ifdef __STDC__
+static const double one=1.0, two=2.0, tiny = 1.0e-300;
+#else
+static double one=1.0, two=2.0, tiny = 1.0e-300;
+#endif
+
+#ifdef __STDC__
+        double tanh(double x)
+#else
+        double tanh(x)
+        double x;
+#endif
+{
+        double t,z;
+        int jx,ix;
+
+    /* High word of |x|. */
+        jx = __HI(x);
+        ix = jx&0x7fffffff;
+
+    /* x is INF or NaN */
+        if(ix>=0x7ff00000) {
+            if (jx>=0) return one/x+one;    /* tanh(+-inf)=+-1 */
+            else       return one/x-one;    /* tanh(NaN) = NaN */
+        }
+
+    /* |x| < 22 */
+        if (ix < 0x40360000) {          /* |x|<22 */
+            if (ix<0x3c800000)          /* |x|<2**-55 */
+                return x*(one+x);       /* tanh(small) = small */
+            if (ix>=0x3ff00000) {       /* |x|>=1  */
+                t = expm1(two*fabs(x));
+                z = one - two/(t+two);
+            } else {
+                t = expm1(-two*fabs(x));
+                z= -t/(t+two);
+            }
+    /* |x| > 22, return +-1 */
+        } else {
+            z = one - tiny;             /* raised inexact flag */
+        }
+        return (jx>=0)? z: -z;
+}