1 files changed, 58 insertions, 0 deletions
diff --git a/ports/sysdeps/alpha/fpu/s_isnan.c b/ports/sysdeps/alpha/fpu/s_isnan.c
new file mode 100644
index 0000000000..b18c7bb5f1
--- /dev/null
+++ b/ports/sysdeps/alpha/fpu/s_isnan.c
@@ -0,0 +1,58 @@
+/* Return 1 if argument is a NaN, else 0.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Ugly kludge to avoid declarations.  */
+#define __isnanf	not___isnanf
+#define isnanf		not_isnanf
+#define __GI___isnanf	not__GI___isnanf
+
+#include <math.h>
+#include <math_ldbl_opt.h>
+
+#undef __isnanf
+#undef isnanf
+#undef __GI___isnanf
+
+/* The hidden_proto in include/math.h was obscured by the macro hackery.  */
+__typeof (__isnan) __isnanf;
+hidden_proto (__isnanf)
+
+
+int
+__isnan (double x)
+{
+  return isunordered (x, x);
+}
+
+hidden_def (__isnan)
+weak_alias (__isnan, isnan)
+
+/* It turns out that the 'double' version will also always work for
+   single-precision.  */
+strong_alias (__isnan, __isnanf)
+hidden_def (__isnanf)
+weak_alias (__isnanf, isnanf)
+
+#ifdef NO_LONG_DOUBLE
+strong_alias (__isnan, __isnanl)
+weak_alias (__isnan, isnanl)
+#endif
+#if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
+compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
+compat_symbol (libc, isnan, isnanl, GLIBC_2_0);
+#endif