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Diffstat (limited to 'math/test-femode.c')
| -rw-r--r-- | math/test-femode.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/math/test-femode.c b/math/test-femode.c new file mode 100644 index 0000000..1e80f32 --- /dev/null +++ b/math/test-femode.c @@ -0,0 +1,231 @@ +/* Test femode_t functions. + 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 <fenv.h> +#include <stdio.h> +#include <math-tests.h> + +static int +test_mmee (int mode1, int mode2, int exc1, int exc2) +{ + int result = 0; + printf ("testing %x %x %x %x\n", (unsigned int) mode1, (unsigned int) mode2, + (unsigned int) exc1, (unsigned int) exc2); + + feclearexcept (FE_ALL_EXCEPT); + int ret = fesetround (mode1); + if (ret != 0) + { + if (ROUNDING_TESTS (float, mode1)) + { + puts ("first fesetround failed unexpectedly"); + result = 1; + } + else + puts ("first fesetround failed, cannot test"); + return result; + } + ret = fesetexcept (exc1); + if (ret != 0) + { + if (EXCEPTION_TESTS (float) || exc1 == 0) + { + puts ("first fesetexcept failed unexpectedly"); + result = 1; + } + else + puts ("first fesetexcept failed, cannot test"); + return result; + } + femode_t saved; + ret = fegetmode (&saved); + if (ret != 0) + { + puts ("fegetmode failed"); + result = 1; + return result; + } + feclearexcept (FE_ALL_EXCEPT); + ret = fesetround (mode2); + if (ret != 0) + { + if (ROUNDING_TESTS (float, mode2)) + { + puts ("second fesetround failed unexpectedly"); + result = 1; + } + else + puts ("second fesetround failed, cannot test"); + return result; + } + ret = fesetexcept (exc2); + if (ret != 0) + { + if (EXCEPTION_TESTS (float) || exc2 == 0) + { + puts ("second fesetexcept failed unexpectedly"); + result = 1; + } + else + puts ("second fesetexcept failed, cannot test"); + return result; + } + ret = fesetmode (&saved); + if (ret != 0) + { + puts ("fesetmode failed"); + result = 1; + return result; + } + /* Verify that the rounding mode was restored but the exception + flags remain unchanged. */ + ret = fegetround (); + if (ret != mode1) + { + printf ("restored rounding mode %x not %x\n", (unsigned int) ret, + (unsigned int) mode1); + result = 1; + } + ret = fetestexcept (FE_ALL_EXCEPT); + if (ret != exc2) + { + printf ("exceptions %x not %x\n", (unsigned int) ret, + (unsigned int) exc2); + result = 1; + } + /* Likewise, with default modes. */ + ret = fesetmode (FE_DFL_MODE); + if (ret != 0) + { + puts ("fesetmode (FE_DFL_MODE) failed"); + result = 1; + return result; + } + ret = fegetround (); + if (ret != FE_TONEAREST) + { + printf ("FE_DFL_MODE rounding mode %x not %x\n", (unsigned int) ret, + (unsigned int) FE_TONEAREST); + result = 1; + } + ret = fetestexcept (FE_ALL_EXCEPT); + if (ret != exc2) + { + printf ("FE_DFL_MODE exceptions %x not %x\n", (unsigned int) ret, + (unsigned int) exc2); + result = 1; + } + return result; +} + +static int +test_mme (int mode1, int mode2, int exc1) +{ + int result = 0; + + result |= test_mmee (mode1, mode2, exc1, 0); + result |= test_mmee (mode1, mode2, exc1, FE_ALL_EXCEPT); +#ifdef FE_DIVBYZERO + result |= test_mmee (mode1, mode2, exc1, FE_DIVBYZERO); +#endif +#ifdef FE_INEXACT + result |= test_mmee (mode1, mode2, exc1, FE_INEXACT); +#endif +#ifdef FE_INVALID + result |= test_mmee (mode1, mode2, exc1, FE_INVALID); +#endif +#ifdef FE_OVERFLOW + result |= test_mmee (mode1, mode2, exc1, FE_OVERFLOW); +#endif +#ifdef FE_UNDERFLOW + result |= test_mmee (mode1, mode2, exc1, FE_UNDERFLOW); +#endif + + return result; +} + +static int +test_mm (int mode1, int mode2) +{ + int result = 0; + + result |= test_mme (mode1, mode2, 0); + result |= test_mme (mode1, mode2, FE_ALL_EXCEPT); +#ifdef FE_DIVBYZERO + result |= test_mme (mode1, mode2, FE_DIVBYZERO); +#endif +#ifdef FE_INEXACT + result |= test_mme (mode1, mode2, FE_INEXACT); +#endif +#ifdef FE_INVALID + result |= test_mme (mode1, mode2, FE_INVALID); +#endif +#ifdef FE_OVERFLOW + result |= test_mme (mode1, mode2, FE_OVERFLOW); +#endif +#ifdef FE_UNDERFLOW + result |= test_mme (mode1, mode2, FE_UNDERFLOW); +#endif + + return result; +} + +static int +test_m (int mode1) +{ + int result = 0; + +#ifdef FE_DOWNWARD + result |= test_mm (mode1, FE_DOWNWARD); +#endif +#ifdef FE_TONEAREST + result |= test_mm (mode1, FE_TONEAREST); +#endif +#ifdef FE_TOWARDZERO + result |= test_mm (mode1, FE_TOWARDZERO); +#endif +#ifdef FE_UPWARD + result |= test_mm (mode1, FE_UPWARD); +#endif + + return result; +} + +static int +do_test (void) +{ + int result = 0; + +#ifdef FE_DOWNWARD + result |= test_m (FE_DOWNWARD); +#endif +#ifdef FE_TONEAREST + result |= test_m (FE_TONEAREST); +#endif +#ifdef FE_TOWARDZERO + result |= test_m (FE_TOWARDZERO); +#endif +#ifdef FE_UPWARD + result |= test_m (FE_UPWARD); +#endif + + return result; +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |