New <math.h> macro named issignaling to check for a signaling NaN (sNaN).

It is based on draft TS 18661 and currently enabled as a GNU extension.

1 files changed, 26 insertions, 0 deletions

diff --git a/sysdeps/powerpc/math-tests.h b/sysdeps/powerpc/math-tests.h
new file mode 100644
index 0000000000..0f09610eea
--- /dev/null
+++ b/sysdeps/powerpc/math-tests.h
@@ -0,0 +1,26 @@
+/* Configuration for math tests.  PowerPC version.
+   Copyright (C) 2013 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/>.  */
+
+/* On PowerPC, in versions of GCC up to at least 4.7.2, a type cast -- which is
+   a IEEE 754-2008 general-computational convertFormat operation (IEEE
+   754-2008, 5.4.2) -- does not turn a sNaN into a qNaN (whilst raising an
+   INVALID exception), which is contrary to IEEE 754-2008 5.1 and 7.2.  This
+   renders certain tests infeasible in this scenario.  */
+#define SNAN_TESTS_TYPE_CAST	0
+
+#include_next <math-tests.h>