kc3-lang/gnulib/tests/test-fenv-except-tracking-1.c
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Hash : 7b089321
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Date : 2025-01-01T09:24:36
maint: run 'make update-copyright'
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tests/test-fenv-except-tracking-1.c
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/* Test of tracking of floating-point exceptions. 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" /* On *BSD/powerpc systems, raising FE_INVALID also sets FE_VXSOFT. */ #ifndef FE_VXSOFT # define FE_VXSOFT 0 #endif #ifndef FE_VXZDZ # define FE_VXZDZ 0 #endif static volatile double a, b, c; int main () { /* Test setting all exception flags. */ if (feraiseexcept (FE_ALL_EXCEPT) != 0) { fputs ("Skipping test: floating-point exceptions are not supported on this machine.\n", stderr); return 77; } ASSERT (/* with the libc's feraiseexcept(): */ fetestexcept (FE_ALL_EXCEPT) == FE_ALL_EXCEPT || /* with gnulib's feraiseexcept(): */ (fetestexcept (FE_ALL_EXCEPT) & ~FE_VXSOFT) == (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)); ASSERT (fetestexcept (FE_INVALID) == FE_INVALID); ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW); ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW); ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT); /* Test clearing all exception flags. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); ASSERT (fetestexcept (FE_ALL_EXCEPT) == 0); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == 0); /* Test setting just one exception flag: FE_INVALID. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); ASSERT (feraiseexcept (FE_INVALID) == 0); ASSERT ((fetestexcept (FE_ALL_EXCEPT) & ~FE_VXSOFT) == FE_INVALID); ASSERT (fetestexcept (FE_INVALID) == FE_INVALID); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == 0); /* Test setting just one exception flag: FE_DIVBYZERO. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); ASSERT (feraiseexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == 0); /* Test setting just one exception flag: FE_OVERFLOW. On many architectures, this has the side-effect of also setting FE_INEXACT: arm64, arm, alpha, hppa, ia64, loongarch64, s390, sh, sparc. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); ASSERT (feraiseexcept (FE_OVERFLOW) == 0); ASSERT ((fetestexcept (FE_ALL_EXCEPT) & ~FE_INEXACT) == FE_OVERFLOW); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); /* Test setting just one exception flag: FE_UNDERFLOW. On many architectures, this has the side-effect of also setting FE_INEXACT: arm64, arm, alpha, hppa, ia64, loongarch64, s390, sh, sparc. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); ASSERT (feraiseexcept (FE_UNDERFLOW) == 0); ASSERT ((fetestexcept (FE_ALL_EXCEPT) & ~FE_INEXACT) == FE_UNDERFLOW); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW); /* Test setting just one exception flag: FE_INEXACT. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); ASSERT (feraiseexcept (FE_INEXACT) == 0); ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_INEXACT); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT); /* Test clearing just one exception flag: FE_INVALID. */ ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0); ASSERT (feclearexcept (FE_INVALID) == 0); ASSERT (/* with the libc's feraiseexcept(): */ fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_INVALID) || /* with gnulib's feraiseexcept(): */ fetestexcept (FE_ALL_EXCEPT) == (FE_DIVBYZERO | FE_INEXACT | FE_OVERFLOW | FE_UNDERFLOW)); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW); ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW); ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT); /* Test clearing just one exception flag: FE_DIVBYZERO. */ ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0); ASSERT (feclearexcept (FE_DIVBYZERO) == 0); ASSERT (/* with the libc's feraiseexcept(): */ fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_DIVBYZERO) || /* with gnulib's feraiseexcept(): */ (fetestexcept (FE_ALL_EXCEPT) & ~FE_VXSOFT) == (FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)); ASSERT (fetestexcept (FE_INVALID) == FE_INVALID); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW); ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW); ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT); /* Test clearing just one exception flag: FE_OVERFLOW. */ ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0); ASSERT (feclearexcept (FE_OVERFLOW) == 0); ASSERT (/* with the libc's feraiseexcept(): */ fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_OVERFLOW) || /* with gnulib's feraiseexcept(): */ (fetestexcept (FE_ALL_EXCEPT) & ~FE_VXSOFT) == (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_UNDERFLOW)); ASSERT (fetestexcept (FE_INVALID) == FE_INVALID); ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW); ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT); /* Test clearing just one exception flag: FE_UNDERFLOW. */ ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0); ASSERT (feclearexcept (FE_UNDERFLOW) == 0); ASSERT (/* with the libc's feraiseexcept(): */ fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_UNDERFLOW) || /* with gnulib's feraiseexcept(): */ (fetestexcept (FE_ALL_EXCEPT) & ~FE_VXSOFT) == (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW)); ASSERT (fetestexcept (FE_INVALID) == FE_INVALID); ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT); /* Test clearing just one exception flag: FE_INEXACT. */ ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0); ASSERT (feclearexcept (FE_INEXACT) == 0); ASSERT (/* with the libc's feraiseexcept(): */ fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_INEXACT) || /* with gnulib's feraiseexcept(): */ (fetestexcept (FE_ALL_EXCEPT) & ~FE_VXSOFT) == (FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)); ASSERT (fetestexcept (FE_INVALID) == FE_INVALID); ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW); ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW); ASSERT (fetestexcept (FE_INEXACT) == 0); #if !(defined __arm__ && defined __SOFTFP__) /* Test the effects of an operation that produces FE_INVALID. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); a = 0; b = 0; c = a / b; ASSERT ((fetestexcept (FE_ALL_EXCEPT) & ~FE_VXZDZ) == FE_INVALID); ASSERT (fetestexcept (FE_INVALID) == FE_INVALID); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == 0); /* Test the effects of an operation that produces FE_DIVBYZERO. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); a = 3; b = 0; c = a / b; ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == 0); /* Test the effects of an operation that produces FE_OVERFLOW. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); a = 1; for (int i = 0; i < 800; i++) a = 2.0 * a; b = 1; for (int i = 0; i < 700; i++) b = 2.0 * b; c = a * b; { int exc = fetestexcept (FE_ALL_EXCEPT); ASSERT ((FE_OVERFLOW & ~exc) == 0); ASSERT ((exc & ~(FE_OVERFLOW | FE_INEXACT)) == 0); } ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); /* Test the effects of an operation that produces FE_UNDERFLOW. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); a = 1; for (int i = 0; i < 800; i++) a = 0.5 * a; b = 1; for (int i = 0; i < 700; i++) b = 0.5 * b; c = a * b; { int exc = fetestexcept (FE_ALL_EXCEPT); ASSERT ((FE_UNDERFLOW & ~exc) == 0); ASSERT ((exc & ~(FE_UNDERFLOW | FE_INEXACT)) == 0); } ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW); /* On alpha, this test works only when compiled with the GCC option '-mieee-with-inexact'. */ # if !defined __alpha /* Test the effects of an operation that produces FE_INEXACT. */ ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0); a = 1; b = 3; c = a / b; ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_INEXACT); ASSERT (fetestexcept (FE_INVALID) == 0); ASSERT (fetestexcept (FE_DIVBYZERO) == 0); ASSERT (fetestexcept (FE_OVERFLOW) == 0); ASSERT (fetestexcept (FE_UNDERFLOW) == 0); ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT); # endif #endif return test_exit_status; }