Make common nextdown implementation generic.

With the exception of those machines using the ldbl-opt in
an Implies file, this is a trivial transformation.

nextdownl is not subject to the non-trivial versioning rules
of the other generated functions, so to keep things simple,
it is handled as a one-off case in ldbl-opt to preserve the
existing behavior.

1 files changed, 29 insertions, 0 deletions

diff --git a/math/s_nextdown_template.c b/math/s_nextdown_template.c
new file mode 100644
index 0000000000..f286dfdaac
--- /dev/null
+++ b/math/s_nextdown_template.c
@@ -0,0 +1,29 @@
+/* Return the greatest floating-point number less than X.
+   Copyright (C) 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 <math.h>
+#include <math_private.h>
+
+/* Return the greatest floating-point number less than X.  */
+FLOAT
+M_DECL_FUNC (__nextdown) (FLOAT x)
+{
+  return -M_SUF (__nextup) (-x);
+}
+
+declare_mgen_alias (__nextdown, nextdown);