+2016-09-28 Joseph Myers <joseph@codesourcery.com>
+
+ * math/math.h
+ [__GLIBC_USE (IEC_60559_BFP_EXT) && !__SUPPORT_SNAN__] (iszero):
+ Cast argument to its own type.
+ * math/test-iszero-excess-precision.c: New file.
+ * math/Makefile (tests): Add test-iszero-excess-precision.
+ (CFLAGS-test-iszero-excess-precision.c): New variable.
+
2016-09-28 Rasmus Villemoes <rv@rasmusvillemoes.dk>
* sysdeps/unix/sysv/linux/spawni.c (posix_spawn_args): Remove pipe
test-signgam-ullong-init test-nan-overflow test-nan-payload \
test-fexcept test-fexcept-traps test-fesetexcept \
test-fesetexcept-traps test-fetestexceptflag test-femode \
- test-femode-traps $(tests-static)
+ test-femode-traps test-iszero-excess-precision $(tests-static)
tests-static = test-fpucw-static test-fpucw-ieee-static \
test-signgam-uchar-static test-signgam-uchar-init-static \
test-signgam-uint-static test-signgam-uint-init-static \
CFLAGS-test-math-isinff.cc = -std=gnu++11
+CFLAGS-test-iszero-excess-precision.c = -fexcess-precision=standard
+
# The -lieee module sets the _LIB_VERSION_ switch to IEEE mode
# for error handling in the -lm functions.
install-lib += libieee.a
--- /dev/null
+/* Test iszero with excess precision.
+ 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 <float.h>
+#include <math.h>
+#include <stdio.h>
+
+#define TEST(TYPE, TRUE_MIN) \
+ do \
+ { \
+ if (iszero (TRUE_MIN / 2)) \
+ puts ("iszero removes excess precision for " #TYPE); \
+ else \
+ { \
+ puts ("iszero fails to remove excess precision for " #TYPE); \
+ result = 1; \
+ } \
+ } \
+ while (0)
+
+static int
+do_test (void)
+{
+ int result = 0;
+
+ TEST (float, FLT_TRUE_MIN);
+ TEST (double, DBL_TRUE_MIN);
+ TEST (long double, LDBL_TRUE_MIN);
+
+ return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"