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70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
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/* Test that tininess.h is correct for this architecture.
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Copyright (C) 2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <fenv.h>
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#include <float.h>
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#include <stdio.h>
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#include <tininess.h>
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volatile float a = 0x1.fffp-126;
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volatile float b = 0x1.0008p-1;
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volatile float c;
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volatile float m = FLT_MIN;
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volatile float mm;
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static int
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do_test (void)
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{
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int result = 0;
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#ifdef FE_UNDERFLOW
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feclearexcept (FE_ALL_EXCEPT);
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mm = m * m;
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if (!fetestexcept (FE_UNDERFLOW))
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{
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puts ("underflow exception not supported at runtime, cannot test");
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return 0;
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}
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feclearexcept (FE_ALL_EXCEPT);
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c = a * b;
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if (fetestexcept (FE_UNDERFLOW))
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{
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if (TININESS_AFTER_ROUNDING)
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{
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puts ("tininess.h says after rounding, "
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"but detected before rounding");
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result = 1;
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}
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}
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else
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{
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if (!TININESS_AFTER_ROUNDING)
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{
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puts ("tininess.h says before rounding, "
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"but detected after rounding");
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result = 1;
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}
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}
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#else
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puts ("underflow exception not supported at compile time, cannot test");
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#endif
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return result;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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