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authorGabriel F. T. Gomes <gftg@linux.vnet.ibm.com>2016-12-09 17:08:14 -0200
committerGabriel F. T. Gomes <gftg@linux.vnet.ibm.com>2016-12-16 08:44:19 -0200
commite4d6a83565479c533aabae9046377a59712a5b22 (patch)
treec941a9ff0c4e409fc1848cd0ce1befbd396b4140 /math/w_scalbln_template.c
parent0a2546cdaa4284cc6ed6af06835fd858ba341838 (diff)
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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.
Diffstat (limited to 'math/w_scalbln_template.c')
-rw-r--r--math/w_scalbln_template.c41
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)