kc3-lang/gnulib/tests/test-fenv-round.c
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Hash : a0d10f43
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Date : 2025-10-20T20:50:21
fenv-rounding tests: Avoid test failure on Android. * tests/test-fenv-round.c (test_towardzero, test_upward) (test_downward): Disable tests that are known to fail. * doc/posix-functions/fesetround.texi: Update list of platforms.
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tests/test-fenv-round.c
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/* Test of floating-point rounding direction. Copyright (C) 2023-2025 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* Written by Bruno Haible <bruno@clisp.org>, 2023. */ #include <config.h> /* Specification. */ #include <fenv.h> #include "macros.h" /* Check the FE_TOWARDZERO rounding direction. */ _GL_UNUSED static void test_towardzero () { { float volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p < a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p > a); } { double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p < a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p > a); } #if !(((defined __FreeBSD__ || defined __OpenBSD__ || defined __ANDROID__) && defined __aarch64__) || (defined __NetBSD__ && defined __sparcv9 /* sparc64 */) || (defined __OpenBSD__ && defined __mips64)) { long double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p < a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p > a); } #endif } /* Check the FE_UPWARD rounding direction. */ _GL_UNUSED static void test_upward () { { float volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p > a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p > a); } { double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p > a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p > a); } #if !(((defined __FreeBSD__ || defined __OpenBSD__ || defined __ANDROID__) && defined __aarch64__) || (defined __NetBSD__ && defined __sparcv9 /* sparc64 */) || (defined __OpenBSD__ && defined __mips64)) { long double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p > a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p > a); } #endif } /* Check the FE_DOWNWARD rounding direction. */ _GL_UNUSED static void test_downward () { { float volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p < a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p < a); } { double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p < a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p < a); } #if !(((defined __FreeBSD__ || defined __OpenBSD__ || defined __ANDROID__) && defined __aarch64__) || (defined __NetBSD__ && defined __sparcv9 /* sparc64 */) || (defined __OpenBSD__ && defined __mips64)) { long double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p < a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p < a); } #endif } /* Check the FE_TONEAREST rounding direction. */ static void test_tonearest () { { float volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p == a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p == a); } { double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p == a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p == a); } { long double volatile a, b, q, p; a = 1; b = 3; q = a / b; p = b * q; ASSERT (p == a); a = -1; b = 3; q = a / b; p = b * q; ASSERT (p == a); } } int main () { /* Check that the default rounding direction is FE_TONEAREST. */ test_tonearest (); /* On alpha, this test works only when compiled with the GCC option '-mfp-rounding-mode=d'. */ #if !((defined __arm__ && defined __SOFTFP__) || defined __alpha) # if defined FE_TOWARDZERO ASSERT (fesetround (FE_TOWARDZERO) == 0); test_towardzero (); ASSERT (fegetround () == FE_TOWARDZERO); # endif # if defined FE_UPWARD ASSERT (fesetround (FE_UPWARD) == 0); test_upward (); ASSERT (fegetround () == FE_UPWARD); # endif # if defined FE_DOWNWARD ASSERT (fesetround (FE_DOWNWARD) == 0); test_downward (); ASSERT (fegetround () == FE_DOWNWARD); # endif #endif ASSERT (fesetround (FE_TONEAREST) == 0); test_tonearest (); ASSERT (fegetround () == FE_TONEAREST); return test_exit_status; }