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49390697b9
Also supply CFLAGS+=-fno-builtin to ensure our unit tests actually test libc functions and not clang's builtins. Sponsored by: FreeBSD Foundation Approved by: kevans MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D40729
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/*-
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* Copyright (c) 2023 The FreeBSD Foundation
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*
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* This software was developed by Robert Clausecker <fuz@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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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 AUTHOR AND CONTRIBUTORS ''AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE
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*/
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#include <sys/cdefs.h>
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#include <atf-c.h>
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#include <limits.h>
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#include <stdint.h>
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#include <strings.h>
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#ifndef FLS
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# define FLS fls
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# define TYPE int
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# define TYPE_MIN INT_MIN
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#endif
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ATF_TC_WITHOUT_HEAD(zero);
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ATF_TC_BODY(zero, tc)
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{
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ATF_CHECK_EQ((TYPE)0, FLS(0));
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}
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ATF_TC_WITHOUT_HEAD(twobit);
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ATF_TC_BODY(twobit, tc)
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{
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const TYPE one = 1;
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TYPE x;
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const int n = sizeof(TYPE) * CHAR_BIT;
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int i, j;
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for (i = 0; i < n - 1; i++)
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for (j = 0; j <= i; j++) {
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x = one << i | one << j;
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ATF_CHECK_EQ_MSG(i + 1, FLS(x),
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"%s(%#jx) == %d != %d", __STRING(FLS), (intmax_t)x, FLS(x), i + 1);
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}
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}
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ATF_TC_WITHOUT_HEAD(twobitneg);
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ATF_TC_BODY(twobitneg, tc)
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{
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const TYPE one = 1;
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TYPE x;
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const int n = sizeof(TYPE) * CHAR_BIT;
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int i, j;
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for (i = 0; i < n - 1; i++)
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for (j = 0; j <= i; j++) {
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x = one << i | one << j | TYPE_MIN;
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ATF_CHECK_EQ_MSG(n, FLS(x),
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"%s(%#jx) == %d != %d", __STRING(FLS), (intmax_t)x, FLS(x), n);
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}
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, zero);
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ATF_TP_ADD_TC(tp, twobit);
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ATF_TP_ADD_TC(tp, twobitneg);
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return (atf_no_error());
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}
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