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glibc-2.41
math/basic-test.c
221 строка
9 KB
Paul Eggert
Update copyright dates with scripts/update-copyrights
01 янв 2025, 22:22
01 янв 2025, 22:22
2642002
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/* Copyright (C) 1999-2025 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 <https://www.gnu.org/licenses/>. */ #include <math.h> #include <float.h> #include <stdio.h> #include <math-tests.h> static int errors = 0; static void check (const char *testname, int result) { if (!result) { printf ("Failure: %s\n", testname); errors++; } } #define TEST_FUNC(NAME, FLOAT, SUFFIX, EPSILON, HUGEVAL) \ static void \ NAME (void) \ { \ /* Variables are declared volatile to forbid some compiler \ optimizations. */ \ volatile FLOAT Inf_var, qNaN_var, zero_var, one_var; \ /* A sNaN is only guaranteed to be representable in variables with */ \ /* static (or thread-local) storage duration. */ \ static volatile FLOAT sNaN_var = __builtin_nans ## SUFFIX (""); \ static volatile FLOAT minus_sNaN_var = -__builtin_nans ## SUFFIX (""); \ FLOAT x1, x2; \ \ zero_var = 0.0; \ one_var = 1.0; \ qNaN_var = __builtin_nan ## SUFFIX (""); \ Inf_var = one_var / zero_var; \ \ (void) &zero_var; \ (void) &one_var; \ (void) &qNaN_var; \ (void) &sNaN_var; \ (void) &minus_sNaN_var; \ (void) &Inf_var; \ \ \ check (#FLOAT " isinf (inf) == 1", isinf (Inf_var) == 1); \ check (#FLOAT " isinf (-inf) == -1", isinf (-Inf_var) == -1); \ check (#FLOAT " !isinf (1)", !(isinf (one_var))); \ check (#FLOAT " !isinf (qNaN)", !(isinf (qNaN_var))); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " !isinf (sNaN)", !(isinf (sNaN_var))); \ \ check (#FLOAT " isnan (qNaN)", isnan (qNaN_var)); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " isnan (sNaN)", isnan (sNaN_var)); \ check (#FLOAT " isnan (-qNaN)", isnan (-qNaN_var)); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " isnan (-sNaN)", isnan (minus_sNaN_var)); \ check (#FLOAT " !isnan (1)", !(isnan (one_var))); \ check (#FLOAT " !isnan (inf)", !(isnan (Inf_var))); \ \ check (#FLOAT " !issignaling (qNaN)", !(issignaling (qNaN_var))); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " issignaling (sNaN)", issignaling (sNaN_var)); \ check (#FLOAT " !issignaling (-qNaN)", !(issignaling (-qNaN_var))); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " issignaling (-sNaN)", issignaling (minus_sNaN_var)); \ check (#FLOAT " !issignaling (1)", !(issignaling (one_var))); \ check (#FLOAT " !issignaling (inf)", !(issignaling (Inf_var))); \ \ check (#FLOAT " inf == inf", Inf_var == Inf_var); \ check (#FLOAT " -inf == -inf", -Inf_var == -Inf_var); \ check (#FLOAT " inf != -inf", Inf_var != -Inf_var); \ check (#FLOAT " qNaN != qNaN", qNaN_var != qNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " sNaN != sNaN", sNaN_var != sNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " qNaN != sNaN", qNaN_var != sNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " -sNaN != -sNaN", minus_sNaN_var != minus_sNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " sNaN != -sNaN", sNaN_var != minus_sNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " qNaN != -sNaN", qNaN_var != minus_sNaN_var); \ \ /* \ the same tests but this time with NAN from <bits/nan.h> \ NAN is a double const \ */ \ check (#FLOAT " isnan (NAN)", isnan (NAN)); \ check (#FLOAT " isnan (-NAN)", isnan (-NAN)); \ check (#FLOAT " !isinf (NAN)", !(isinf (NAN))); \ check (#FLOAT " !isinf (-NAN)", !(isinf (-NAN))); \ check (#FLOAT " NAN != NAN", NAN != NAN); \ check (#FLOAT " NAN != qNaN", NAN != qNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " NAN != sNaN", NAN != sNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " NAN != -sNaN", NAN != minus_sNaN_var); \ \ /* \ And again with the value returned by the `nan' function. \ */ \ check (#FLOAT " isnan (nan (\"\"))", isnan (nan ## SUFFIX (""))); \ check (#FLOAT " isnan (-nan (\"\"))", isnan (-nan ## SUFFIX (""))); \ check (#FLOAT " !isinf (nan (\"\"))", !(isinf (nan ## SUFFIX ("")))); \ check (#FLOAT " !isinf (-nan (\"\"))", !(isinf (-nan ## SUFFIX ("")))); \ check (#FLOAT " nan (\"\") != nan (\"\")", \ nan ## SUFFIX ("") != nan ## SUFFIX ("")); \ check (#FLOAT " nan (\"\") != qNaN", nan ## SUFFIX ("") != qNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " nan (\"\") != sNaN", nan ## SUFFIX ("") != sNaN_var); \ if (SNAN_TESTS (FLOAT)) \ check (#FLOAT " nan (\"\") != -sNaN", \ nan ## SUFFIX ("") != minus_sNaN_var); \ \ /* test if EPSILON is ok */ \ x1 = 1.0; \ x2 = x1 + EPSILON; \ check (#FLOAT " 1 != 1+EPSILON", x1 != x2); \ \ x1 = 1.0; \ x2 = x1 - EPSILON; \ check (#FLOAT " 1 != 1-EPSILON", x1 != x2); \ \ /* test if HUGE_VALx is ok */ \ x1 = HUGEVAL; \ check (#FLOAT " isinf (HUGE_VALx) == +1", isinf (x1) == +1); \ x1 = - HUGEVAL; \ check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1); \ } #define TEST_CONVERT(NAME, FLOAT, DOUBLE, SUFFIX) \ void \ NAME (void) \ { \ volatile DOUBLE Inf_var, qNaN_var, zero_var, one_var; \ /* A sNaN is only guaranteed to be representable in variables with */ \ /* static (or thread-local) storage duration. */ \ static volatile DOUBLE sNaN_var = __builtin_nans ## SUFFIX (""); \ FLOAT x1, x2; \ \ zero_var = 0.0; \ one_var = 1.0; \ qNaN_var = __builtin_nan ## SUFFIX (""); \ Inf_var = one_var / zero_var; \ \ (void) &qNaN_var; \ (void) &sNaN_var; \ (void) &Inf_var; \ \ x1 = (FLOAT) qNaN_var; \ check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") qNaN, isnan", isnan (x1)); \ check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") qNaN, !issignaling", \ !issignaling (x1)); \ if (SNAN_TESTS (FLOAT)) \ { \ x1 = (FLOAT) sNaN_var; \ check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") sNaN, isnan", isnan (x1)); \ if (SNAN_TESTS_TYPE_CAST) \ { \ /* Upon type conversion, a sNaN is converted into a qNaN plus an */ \ /* INVALID exception (not checked here). */ \ check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") sNaN, !issignaling", \ !issignaling (x1)); \ } \ } \ x2 = (FLOAT) Inf_var; \ check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") Inf", isinf (x2) != 0); \ } TEST_FUNC (float_test, float, f, FLT_EPSILON, HUGE_VALF) TEST_FUNC (double_test, double, , DBL_EPSILON, HUGE_VAL) TEST_CONVERT (convert_dfsf_test, float, double, ) TEST_CONVERT (convert_sfdf_test, double, float, f) #if LDBL_MANT_DIG > DBL_MANT_DIG TEST_FUNC (ldouble_test, long double, l, LDBL_EPSILON, HUGE_VALL) TEST_CONVERT (convert_tfsf_test, float, long double, l) TEST_CONVERT (convert_sftf_test, long double, float, f) TEST_CONVERT (convert_tfdf_test, double, long double, l) TEST_CONVERT (convert_dftf_test, long double, double, ) #endif int do_test (void) { float_test (); double_test (); convert_dfsf_test(); convert_sfdf_test(); #if LDBL_MANT_DIG > DBL_MANT_DIG ldouble_test (); convert_tfsf_test(); convert_sftf_test(); convert_tfdf_test(); convert_dftf_test(); #endif return errors != 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"