503 lines
13 KiB
C
503 lines
13 KiB
C
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/* $NetBSD: t_ldexp.c,v 1.10 2011/09/19 05:40:38 jruoho Exp $ */
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jukka Ruohonen.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: t_ldexp.c,v 1.10 2011/09/19 05:40:38 jruoho Exp $");
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#include <atf-c.h>
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#include <atf-c/config.h>
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#include <math.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#define SKIP 9999
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#define FORMAT "%23.23lg"
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static const int exps[] = { 0, 1, -1, 100, -100 };
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struct ldexp_test {
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double x;
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int exp1;
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int exp2;
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const char *result;
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};
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struct ldexp_test ldexp_basic[] = {
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{ 1.0, 5, SKIP, " 32" },
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{ 1.0, 1022, SKIP, "4.4942328371557897693233e+307" },
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{ 1.0, 1023, -1, "4.4942328371557897693233e+307" },
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{ 1.0, 1023, SKIP, "8.9884656743115795386465e+307" },
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{ 1.0, 1022, 1, "8.9884656743115795386465e+307" },
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{ 1.0, -1022, 2045, "8.9884656743115795386465e+307" },
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{ 1.0, -5, SKIP, " 0.03125" },
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{ 1.0, -1021, SKIP, "4.4501477170144027661805e-308" },
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{ 1.0, -1022, 1, "4.4501477170144027661805e-308" },
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{ 1.0, -1022, SKIP, "2.2250738585072013830902e-308" },
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{ 1.0, -1021, -1, "2.2250738585072013830902e-308" },
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{ 1.0, 1023, -2045, "2.2250738585072013830902e-308" },
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{ 1.0, 1023, -1023, " 1" },
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{ 1.0, -1022, 1022, " 1" },
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{ 0, 0, 0, NULL }
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};
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struct ldexp_test ldexp_zero[] = {
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{ 0.0, -1, SKIP, " 0" },
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{ 0.0, 0, SKIP, " 0" },
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{ 0.0, 1, SKIP, " 0" },
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{ 0.0, 1024, SKIP, " 0" },
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{ 0.0, 1025, SKIP, " 0" },
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{ 0.0, -1023, SKIP, " 0" },
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{ 0.0, -1024, SKIP, " 0" },
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{ 0, 0, 0, NULL }
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};
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struct ldexp_test ldexp_infinity[] = {
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{ 1.0, 1024, -1, " inf" },
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{ 1.0, 1024, 0, " inf" },
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{ 1.0, 1024, 1, " inf" },
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{ -1.0, 1024, -1, " -inf" },
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{ -1.0, 1024, 0, " -inf" },
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{ -1.0, 1024, 1, " -inf" },
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{ 0, 0, 0, NULL }
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};
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struct ldexp_test ldexp_overflow[] = {
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{ 1.0, 1024, SKIP, " inf" },
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{ 1.0, 1023, 1, " inf" },
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{ 1.0, -1022, 2046, " inf" },
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{ 1.0, 1025, SKIP, " inf" },
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{ -1.0, 1024, SKIP, " -inf" },
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{ -1.0, 1023, 1, " -inf" },
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{ -1.0, -1022, 2046, " -inf" },
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{ -1.0, 1025, SKIP, " -inf" },
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{ 0, 0, 0, NULL }
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};
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struct ldexp_test ldexp_denormal[] = {
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{ 1.0, -1023, SKIP, "1.1125369292536006915451e-308" },
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{ 1.0, -1022, -1, "1.1125369292536006915451e-308" },
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{ 1.0, 1023, -2046, "1.1125369292536006915451e-308" },
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{ 1.0, -1024, SKIP, "5.5626846462680034577256e-309" },
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{ 1.0, -1074, SKIP, "4.9406564584124654417657e-324" },
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{ -1.0, -1023, SKIP, "-1.1125369292536006915451e-308" },
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{ -1.0, -1022, -1, "-1.1125369292536006915451e-308" },
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{ -1.0, 1023, -2046, "-1.1125369292536006915451e-308" },
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{ -1.0, -1024, SKIP, "-5.5626846462680034577256e-309" },
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{ -1.0, -1074, SKIP, "-4.9406564584124654417657e-324" },
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{ 0, 0, 0, NULL }
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};
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struct ldexp_test ldexp_underflow[] = {
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{ 1.0, -1075, SKIP, " 0" },
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{ 1.0, -1074, -1, " 0" },
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{ 1.0, 1023, -2098, " 0" },
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{ 1.0, -1076, SKIP, " 0" },
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{ -1.0, -1075, SKIP, " -0" },
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{ -1.0, -1074, -1, " -0" },
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{ -1.0, 1023, -2098, " -0" },
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{ -1.0, -1076, SKIP, " -0" },
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{ 0, 0, 0, NULL }
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};
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struct ldexp_test ldexp_denormal_large[] = {
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{ 1.0, -1028, 1024, " 0.0625" },
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{ 1.0, -1028, 1025, " 0.125" },
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{ 1.0, -1028, 1026, " 0.25" },
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{ 1.0, -1028, 1027, " 0.5" },
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{ 1.0, -1028, 1028, " 1" },
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{ 1.0, -1028, 1029, " 2" },
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{ 1.0, -1028, 1030, " 4" },
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{ 1.0, -1028, 1040, " 4096" },
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{ 1.0, -1028, 1050, " 4194304" },
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{ 1.0, -1028, 1060, " 4294967296" },
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{ 1.0, -1028, 1100, " 4722366482869645213696" },
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{ 1.0, -1028, 1200, "5.9863107065073783529623e+51" },
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{ 1.0, -1028, 1300, "7.5885503602567541832791e+81" },
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{ 1.0, -1028, 1400, "9.6196304190416209014353e+111" },
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{ 1.0, -1028, 1500, "1.2194330274671844653834e+142" },
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{ 1.0, -1028, 1600, "1.5458150092069033378781e+172" },
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{ 1.0, -1028, 1700, "1.9595533242629369747791e+202" },
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{ 1.0, -1028, 1800, "2.4840289476811342962384e+232" },
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{ 1.0, -1028, 1900, "3.1488807865122869393369e+262" },
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{ 1.0, -1028, 2000, "3.9916806190694396233127e+292" },
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{ 1.0, -1028, 2046, "2.808895523222368605827e+306" },
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{ 1.0, -1028, 2047, "5.6177910464447372116541e+306" },
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{ 1.0, -1028, 2048, "1.1235582092889474423308e+307" },
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{ 1.0, -1028, 2049, "2.2471164185778948846616e+307" },
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{ 1.0, -1028, 2050, "4.4942328371557897693233e+307" },
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{ 1.0, -1028, 2051, "8.9884656743115795386465e+307" },
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{ 0, 0, 0, NULL }
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};
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static void
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run_test(struct ldexp_test *table)
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{
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char outbuf[64];
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size_t i;
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double v;
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for (i = 0; table->result != NULL; table++, i++) {
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v = ldexp(table->x, table->exp1);
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if (table->exp2 == SKIP)
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continue;
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v = ldexp(v, table->exp2);
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(void)snprintf(outbuf, sizeof(outbuf), FORMAT, v);
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ATF_CHECK_STREQ_MSG(table->result, outbuf,
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"Entry %zu:\n\tExp: \"%s\"\n\tAct: \"%s\"",
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i, table->result, outbuf);
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}
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}
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/*
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* ldexp(3)
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*/
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ATF_TC(ldexp_exp2);
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ATF_TC_HEAD(ldexp_exp2, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test ldexp(x, n) == x * exp2(n)");
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}
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ATF_TC_BODY(ldexp_exp2, tc)
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{
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#ifndef __vax__
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const double n[] = { 1, 2, 3, 10, 50, 100 };
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const double eps = 1.0e-40;
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const double x = 12.0;
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double y;
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size_t i;
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for (i = 0; i < __arraycount(n); i++) {
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y = ldexp(x, n[i]);
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if (fabs(y - (x * exp2(n[i]))) > eps) {
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atf_tc_fail_nonfatal("ldexp(%0.01f, %0.01f) "
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"!= %0.01f * exp2(%0.01f)", x, n[i], x, n[i]);
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}
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}
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#endif
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}
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ATF_TC(ldexp_nan);
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ATF_TC_HEAD(ldexp_nan, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test ldexp(NaN) == NaN");
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}
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ATF_TC_BODY(ldexp_nan, tc)
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{
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#ifndef __vax__
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const double x = 0.0L / 0.0L;
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double y;
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size_t i;
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ATF_REQUIRE(isnan(x) != 0);
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for (i = 0; i < __arraycount(exps); i++) {
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y = ldexp(x, exps[i]);
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ATF_CHECK(isnan(y) != 0);
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}
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#endif
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}
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ATF_TC(ldexp_inf_neg);
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ATF_TC_HEAD(ldexp_inf_neg, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test ldexp(-Inf) == -Inf");
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}
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ATF_TC_BODY(ldexp_inf_neg, tc)
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{
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#ifndef __vax__
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const double x = -1.0L / 0.0L;
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size_t i;
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for (i = 0; i < __arraycount(exps); i++)
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ATF_CHECK(ldexp(x, exps[i]) == x);
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#endif
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}
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ATF_TC(ldexp_inf_pos);
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ATF_TC_HEAD(ldexp_inf_pos, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test ldexp(+Inf) == +Inf");
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}
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ATF_TC_BODY(ldexp_inf_pos, tc)
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{
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#ifndef __vax__
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const double x = 1.0L / 0.0L;
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size_t i;
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for (i = 0; i < __arraycount(exps); i++)
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ATF_CHECK(ldexp(x, exps[i]) == x);
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#endif
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}
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ATF_TC(ldexp_zero_neg);
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ATF_TC_HEAD(ldexp_zero_neg, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test ldexp(-0.0) == -0.0");
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}
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ATF_TC_BODY(ldexp_zero_neg, tc)
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{
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#ifndef __vax__
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const double x = -0.0L;
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double y;
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size_t i;
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ATF_REQUIRE(signbit(x) != 0);
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for (i = 0; i < __arraycount(exps); i++) {
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y = ldexp(x, exps[i]);
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ATF_CHECK(x == y);
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ATF_CHECK(signbit(y) != 0);
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}
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#endif
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}
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ATF_TC(ldexp_zero_pos);
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ATF_TC_HEAD(ldexp_zero_pos, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test ldexp(+0.0) == +0.0");
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}
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ATF_TC_BODY(ldexp_zero_pos, tc)
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{
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#ifndef __vax__
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const double x = 0.0L;
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double y;
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size_t i;
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ATF_REQUIRE(signbit(x) == 0);
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for (i = 0; i < __arraycount(exps); i++) {
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y = ldexp(x, exps[i]);
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ATF_CHECK(x == y);
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ATF_CHECK(signbit(y) == 0);
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}
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#endif
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}
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/*
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* ldexpf(3)
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*/
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ATF_TC(ldexpf_exp2f);
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ATF_TC_HEAD(ldexpf_exp2f, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test ldexpf(x, n) == x * exp2f(n)");
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}
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|
|
||
|
|
ATF_TC_BODY(ldexpf_exp2f, tc)
|
||
|
|
{
|
||
|
|
#ifndef __vax__
|
||
|
|
const float n[] = { 1, 2, 3, 10, 50, 100 };
|
||
|
|
const float eps = 1.0e-9;
|
||
|
|
const float x = 12.0;
|
||
|
|
float y;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
for (i = 0; i < __arraycount(n); i++) {
|
||
|
|
|
||
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|
y = ldexpf(x, n[i]);
|
||
|
|
|
||
|
|
if (fabsf(y - (x * exp2f(n[i]))) > eps) {
|
||
|
|
atf_tc_fail_nonfatal("ldexpf(%0.01f, %0.01f) "
|
||
|
|
"!= %0.01f * exp2f(%0.01f)", x, n[i], x, n[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC(ldexpf_nan);
|
||
|
|
ATF_TC_HEAD(ldexpf_nan, tc)
|
||
|
|
{
|
||
|
|
atf_tc_set_md_var(tc, "descr", "Test ldexpf(NaN) == NaN");
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC_BODY(ldexpf_nan, tc)
|
||
|
|
{
|
||
|
|
#ifndef __vax__
|
||
|
|
const float x = 0.0L / 0.0L;
|
||
|
|
float y;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
ATF_REQUIRE(isnan(x) != 0);
|
||
|
|
|
||
|
|
for (i = 0; i < __arraycount(exps); i++) {
|
||
|
|
y = ldexpf(x, exps[i]);
|
||
|
|
ATF_CHECK(isnan(y) != 0);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC(ldexpf_inf_neg);
|
||
|
|
ATF_TC_HEAD(ldexpf_inf_neg, tc)
|
||
|
|
{
|
||
|
|
atf_tc_set_md_var(tc, "descr", "Test ldexpf(-Inf) == -Inf");
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC_BODY(ldexpf_inf_neg, tc)
|
||
|
|
{
|
||
|
|
#ifndef __vax__
|
||
|
|
const float x = -1.0L / 0.0L;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
for (i = 0; i < __arraycount(exps); i++)
|
||
|
|
ATF_CHECK(ldexpf(x, exps[i]) == x);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC(ldexpf_inf_pos);
|
||
|
|
ATF_TC_HEAD(ldexpf_inf_pos, tc)
|
||
|
|
{
|
||
|
|
atf_tc_set_md_var(tc, "descr", "Test ldexpf(+Inf) == +Inf");
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC_BODY(ldexpf_inf_pos, tc)
|
||
|
|
{
|
||
|
|
#ifndef __vax__
|
||
|
|
const float x = 1.0L / 0.0L;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
for (i = 0; i < __arraycount(exps); i++)
|
||
|
|
ATF_CHECK(ldexpf(x, exps[i]) == x);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC(ldexpf_zero_neg);
|
||
|
|
ATF_TC_HEAD(ldexpf_zero_neg, tc)
|
||
|
|
{
|
||
|
|
atf_tc_set_md_var(tc, "descr", "Test ldexpf(-0.0) == -0.0");
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC_BODY(ldexpf_zero_neg, tc)
|
||
|
|
{
|
||
|
|
#ifndef __vax__
|
||
|
|
const float x = -0.0L;
|
||
|
|
float y;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
ATF_REQUIRE(signbit(x) != 0);
|
||
|
|
|
||
|
|
for (i = 0; i < __arraycount(exps); i++) {
|
||
|
|
y = ldexpf(x, exps[i]);
|
||
|
|
ATF_CHECK(x == y);
|
||
|
|
ATF_CHECK(signbit(y) != 0);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC(ldexpf_zero_pos);
|
||
|
|
ATF_TC_HEAD(ldexpf_zero_pos, tc)
|
||
|
|
{
|
||
|
|
atf_tc_set_md_var(tc, "descr", "Test ldexpf(+0.0) == +0.0");
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TC_BODY(ldexpf_zero_pos, tc)
|
||
|
|
{
|
||
|
|
#ifndef __vax__
|
||
|
|
const float x = 0.0L;
|
||
|
|
float y;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
ATF_REQUIRE(signbit(x) == 0);
|
||
|
|
|
||
|
|
for (i = 0; i < __arraycount(exps); i++) {
|
||
|
|
y = ldexpf(x, exps[i]);
|
||
|
|
ATF_CHECK(x == y);
|
||
|
|
ATF_CHECK(signbit(y) == 0);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#define TEST(name, desc) \
|
||
|
|
ATF_TC(name); \
|
||
|
|
ATF_TC_HEAD(name, tc) \
|
||
|
|
{ \
|
||
|
|
\
|
||
|
|
atf_tc_set_md_var(tc, "descr", \
|
||
|
|
"Test ldexp(3) for " ___STRING(desc)); \
|
||
|
|
} \
|
||
|
|
ATF_TC_BODY(name, tc) \
|
||
|
|
{ \
|
||
|
|
const char *machine; \
|
||
|
|
\
|
||
|
|
machine = atf_config_get("atf_machine"); \
|
||
|
|
if (strcmp("vax", machine) == 0) \
|
||
|
|
atf_tc_skip("Test not valid for %s", machine); \
|
||
|
|
run_test(name); \
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(ldexp_basic, basics)
|
||
|
|
TEST(ldexp_zero, zero)
|
||
|
|
TEST(ldexp_infinity, infinity)
|
||
|
|
TEST(ldexp_overflow, overflow)
|
||
|
|
TEST(ldexp_denormal, denormal)
|
||
|
|
TEST(ldexp_denormal_large, large)
|
||
|
|
TEST(ldexp_underflow, underflow)
|
||
|
|
|
||
|
|
ATF_TP_ADD_TCS(tp)
|
||
|
|
{
|
||
|
|
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_basic);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_zero);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_infinity);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_overflow);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_denormal);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_underflow);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_denormal_large);
|
||
|
|
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_exp2);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_nan);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_inf_neg);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_inf_pos);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_zero_neg);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexp_zero_pos);
|
||
|
|
|
||
|
|
ATF_TP_ADD_TC(tp, ldexpf_exp2f);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexpf_nan);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexpf_inf_neg);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexpf_inf_pos);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexpf_zero_neg);
|
||
|
|
ATF_TP_ADD_TC(tp, ldexpf_zero_pos);
|
||
|
|
|
||
|
|
return atf_no_error();
|
||
|
|
}
|