--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/runtime/sharedRuntimeMath.hpp	Tue Apr 07 14:58:49 2015 +0200
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2014, 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.
+ *
+ * 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.
+ *
+ */
+
+#ifndef SHARE_VM_RUNTIME_SHAREDRUNTIMEMATH_HPP
+#define SHARE_VM_RUNTIME_SHAREDRUNTIMEMATH_HPP
+
+#include <math.h>
+
+// Used to access the lower/higher 32 bits of a double
+typedef union {
+    double d;
+    struct {
+#ifdef VM_LITTLE_ENDIAN
+      int lo;
+      int hi;
+#else
+      int hi;
+      int lo;
+#endif
+    } split;
+} DoubleIntConv;
+
+static inline int high(double d) {
+  DoubleIntConv x;
+  x.d = d;
+  return x.split.hi;
+}
+
+static inline int low(double d) {
+  DoubleIntConv x;
+  x.d = d;
+  return x.split.lo;
+}
+
+static inline void set_high(double* d, int high) {
+  DoubleIntConv conv;
+  conv.d = *d;
+  conv.split.hi = high;
+  *d = conv.d;
+}
+
+static inline void set_low(double* d, int low) {
+  DoubleIntConv conv;
+  conv.d = *d;
+  conv.split.lo = low;
+  *d = conv.d;
+}
+
+static double copysignA(double x, double y) {
+  DoubleIntConv convX;
+  convX.d = x;
+  convX.split.hi = (convX.split.hi & 0x7fffffff) | (high(y) & 0x80000000);
+  return convX.d;
+}
+
+/*
+ * ====================================================
+ * Copyright (c) 1998 Oracle and/or its affiliates. All rights reserved.
+ *
+ * Developed at SunSoft, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * scalbn (double x, int n)
+ * scalbn(x,n) returns x* 2**n  computed by  exponent
+ * manipulation rather than by actually performing an
+ * exponentiation or a multiplication.
+ */
+
+static const double
+two54   =  1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
+twom54  =  5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */
+hugeX  = 1.0e+300,
+tiny   = 1.0e-300;
+
+static double scalbnA(double x, int n) {
+  int  k,hx,lx;
+  hx = high(x);
+  lx = low(x);
+  k = (hx&0x7ff00000)>>20;              /* extract exponent */
+  if (k==0) {                           /* 0 or subnormal x */
+    if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */
+    x *= two54;
+    hx = high(x);
+    k = ((hx&0x7ff00000)>>20) - 54;
+    if (n< -50000) return tiny*x;       /*underflow*/
+  }
+  if (k==0x7ff) return x+x;             /* NaN or Inf */
+  k = k+n;
+  if (k > 0x7fe) return hugeX*copysignA(hugeX,x); /* overflow  */
+  if (k > 0) {                          /* normal result */
+    set_high(&x, (hx&0x800fffff)|(k<<20));
+    return x;
+  }
+  if (k <= -54) {
+    if (n > 50000)      /* in case integer overflow in n+k */
+      return hugeX*copysignA(hugeX,x);  /*overflow*/
+    else return tiny*copysignA(tiny,x); /*underflow*/
+  }
+  k += 54;                              /* subnormal result */
+  set_high(&x, (hx&0x800fffff)|(k<<20));
+  return x*twom54;
+}
+
+#endif // SHARE_VM_RUNTIME_SHAREDRUNTIMEMATH_HPP