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Diffstat (limited to 'ext/fputils/tests/fp80_cvfd.c')
| -rw-r--r-- | ext/fputils/tests/fp80_cvfd.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/ext/fputils/tests/fp80_cvfd.c b/ext/fputils/tests/fp80_cvfd.c new file mode 100644 index 000000000..d4980287a --- /dev/null +++ b/ext/fputils/tests/fp80_cvfd.c @@ -0,0 +1,120 @@ +/* + * Copyright (c) 2013, Andreas Sandberg + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <fputils/fp80.h> + +#include "test_helper.h" + +#include <assert.h> +#include <math.h> +#include <stdio.h> +#include <stdlib.h> + +static void +test_cvfd_class(const char *name, double fin) +{ + test_diag("converting '%e' -> fp80...", fin); + fp80_t v = fp80_cvfd(fin); + int class_ok; + int fp64_class = fpclassify(fin); + int class = fp64_class == FP_SUBNORMAL ? FP_NORMAL : fp64_class; + int fp80_class = fp80_classify(v); + + printf("# "); + fp80_debug_dump(stdout, v); + test_diag("isnan: %i, isinf: %i, iszero: %i, isnormal: %i, issubnormal: %i", + fp80_isnan(v), fp80_isinf(v), fp80_iszero(v), + fp80_isnormal(v), fp80_issubnormal(v)); + test_diag("class(fp64): %i, expected class: %i, class(fp80): %i", + fp64_class, class, fp80_classify(v)); + switch (class) { + case FP_NAN: + class_ok = fp80_isnan(v) && !fp80_isinf(v) && !fp80_iszero(v) && + !fp80_isnormal(v) && !fp80_issubnormal(v); + break; + + case FP_INFINITE: + class_ok = !fp80_isnan(v) && fp80_isinf(v) && !fp80_iszero(v) && + !fp80_isnormal(v) && !fp80_issubnormal(v); + break; + case FP_ZERO: + class_ok = !fp80_isnan(v) && !fp80_isinf(v) && fp80_iszero(v) && + !fp80_isnormal(v) && !fp80_issubnormal(v); + break; + + case FP_SUBNORMAL: + class_ok = !fp80_isnan(v) && !fp80_isinf(v) && !fp80_iszero(v) && + !fp80_isnormal(v) && fp80_issubnormal(v); + break; + + case FP_NORMAL: + class_ok = !fp80_isnan(v) && !fp80_isinf(v) && !fp80_iszero(v) && + fp80_isnormal(v) && !fp80_issubnormal(v); + break; + + default: + test_bail("unexpected FP class (%i)", class); + } + + if (!class_ok) { + test_diag("inconsistent classification"); + test_fail(name); + } else if (fp80_class != class) { + test_diag("class mismatch"); + test_fail(name); + } else { + test_ok(name); + } +} + +static void +test_cvfd_class_exp(const char *name, double x, int exp) +{ + double val = ldexp(x, exp); + test_cvfd_class(name, val); +} + +int +main(int argc, char *argv[]) +{ + test_init(9); + + test_cvfd_class("double->fp80 +inf", -INFINITY); + test_cvfd_class("double->fp80 -inf", INFINITY); + test_cvfd_class("double->fp80 +nan", NAN); + test_cvfd_class("double->fp80 -nan", -NAN); + test_cvfd_class("double->fp80 +0", 0); + test_cvfd_class("double->fp80 PI", M_PI); + + test_cvfd_class_exp("double->fp80 smallest normal", 1.0, -1022); + test_cvfd_class_exp("double->fp80 denormal1", 0.5, -1022); + test_cvfd_class_exp("double->fp80 denormal2", 0.25, -1022); + + test_exit(); +} |