Make w_scalbln type-generic

This patch converts the wrapper scalbln (which set errno directly
rather than doing anything with __kernel_standard) to use the
type-generic template machinery, in the same way that has been done
for ldexp.

Tested for powerpc64le, s390, and x86_64.

1 files changed, 41 insertions, 0 deletions

diff --git a/math/w_scalbln_template.c b/math/w_scalbln_template.c
new file mode 100644
index 0000000000..11c9afe37d
--- /dev/null
+++ b/math/w_scalbln_template.c
@@ -0,0 +1,41 @@
+/* Wrapper for __scalbln handles setting errno.
+   Copyright (C) 2014-2016 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/>.  */
+
+#include <errno.h>
+#include <math.h>
+#include <math_private.h>
+
+FLOAT
+M_DECL_FUNC (__w_scalbln) (FLOAT x, long int n)
+{
+  if (!isfinite (x) || x == 0)
+    return x + x;
+
+  x = M_SUF (__scalbln) (x, n);
+
+  if (!isfinite (x) || x == 0)
+    __set_errno (ERANGE);
+
+  return x;
+}
+
+/* Define strong_alias to nothing because we don't want
+   declare_mgen_alias to create a strong alias for scalblnl.  */
+#undef strong_alias
+#define strong_alias(name, alias_name)
+declare_mgen_alias (__w_scalbln, scalbln)