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-rw-r--r--stdlib/tst-tininess.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/stdlib/tst-tininess.c b/stdlib/tst-tininess.c
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+/* Test that tininess.h is correct for this architecture.
+ Copyright (C) 2012 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 <fenv.h>
+#include <float.h>
+#include <stdio.h>
+#include <tininess.h>
+
+volatile float a = 0x1.fffp-126;
+volatile float b = 0x1.0008p-1;
+volatile float c;
+volatile float m = FLT_MIN;
+volatile float mm;
+
+static int
+do_test (void)
+{
+ int result = 0;
+#ifdef FE_UNDERFLOW
+ feclearexcept (FE_ALL_EXCEPT);
+ mm = m * m;
+ if (!fetestexcept (FE_UNDERFLOW))
+ {
+ puts ("underflow exception not supported at runtime, cannot test");
+ return 0;
+ }
+ feclearexcept (FE_ALL_EXCEPT);
+ c = a * b;
+ if (fetestexcept (FE_UNDERFLOW))
+ {
+ if (TININESS_AFTER_ROUNDING)
+ {
+ puts ("tininess.h says after rounding, "
+ "but detected before rounding");
+ result = 1;
+ }
+ }
+ else
+ {
+ if (!TININESS_AFTER_ROUNDING)
+ {
+ puts ("tininess.h says before rounding, "
+ "but detected after rounding");
+ result = 1;
+ }
+ }
+#else
+ puts ("underflow exception not supported at compile time, cannot test");
+#endif
+ return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"