1 files changed, 72 insertions, 0 deletions
diff --git a/winsup/cygwin/math/expm1.def.h b/winsup/cygwin/math/expm1.def.h
new file mode 100644
index 000000000..5a2b6f498
--- /dev/null
+++ b/winsup/cygwin/math/expm1.def.h
@@ -0,0 +1,72 @@
+/*
+ This Software is provided under the Zope Public License (ZPL) Version 2.1.
+
+ Copyright (c) 2009, 2010 by the mingw-w64 project
+
+ See the AUTHORS file for the list of contributors to the mingw-w64 project.
+
+ This license has been certified as open source. It has also been designated
+ as GPL compatible by the Free Software Foundation (FSF).
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions in source code must retain the accompanying copyright
+      notice, this list of conditions, and the following disclaimer.
+   2. Redistributions in binary form must reproduce the accompanying
+      copyright notice, this list of conditions, and the following disclaimer
+      in the documentation and/or other materials provided with the
+      distribution.
+   3. Names of the copyright holders must not be used to endorse or promote
+      products derived from this software without prior written permission
+      from the copyright holders.
+   4. The right to distribute this software or to use it for any purpose does
+      not give you the right to use Servicemarks (sm) or Trademarks (tm) of
+      the copyright holders.  Use of them is covered by separate agreement
+      with the copyright holders.
+   5. If any files are modified, you must cause the modified files to carry
+      prominent notices stating that you changed the files and the date of
+      any change.
+
+ Disclaimer
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESSED
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
+ OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "complex_internal.h"
+#include <errno.h>
+
+__FLT_TYPE
+__FLT_ABI(expm1) (__FLT_TYPE x)
+{
+  int x_class = fpclassify (x);
+  if (x_class == FP_NAN)
+  {
+    __FLT_RPT_DOMAIN ("expm1", x, 0.0, x);
+    return x;
+  }
+  else if (x_class == FP_INFINITE)
+  {
+    return (signbit (x) ? -__FLT_CST(1.0) : __FLT_HUGE_VAL);
+  }
+  else if (x_class == FP_ZERO)
+  {
+    return x;
+  }
+  if (__FLT_ABI (fabs) (x) < __FLT_LOGE2)
+    {
+      x /= __FLT_LOGE2;
+      __asm__ __volatile__ ("f2xm1" : "=t" (x) : "0" (x));
+      return x;
+    }
+  return __FLT_ABI (exp) (x) - __FLT_CST (1.0);
+}