1 /*- 2 * Copyright (c) 2023 The FreeBSD Foundation 3 * 4 * This software was developed by Robert Clausecker <fuz@FreeBSD.org> 5 * under sponsorship from the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ''AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE 27 */ 28 29 #include <atf-c.h> 30 #include <limits.h> 31 #include <stdint.h> 32 #include <strings.h> 33 34 #ifndef FFS 35 # define FFS ffs 36 # define TYPE int 37 # define TYPE_MIN INT_MIN 38 #endif 39 40 ATF_TC_WITHOUT_HEAD(zero); ATF_TC_BODY(zero,tc)41 ATF_TC_BODY(zero, tc) 42 { 43 ATF_CHECK_EQ((TYPE)0, FFS(0)); 44 } 45 46 ATF_TC_WITHOUT_HEAD(twobit); ATF_TC_BODY(twobit,tc)47 ATF_TC_BODY(twobit, tc) 48 { 49 const TYPE one = 1; 50 TYPE x; 51 const int n = sizeof(TYPE) * CHAR_BIT; 52 int i, j; 53 54 for (i = 0; i < n - 1; i++) 55 for (j = 0; j <= i; j++) { 56 x = one << i | one << j; 57 ATF_CHECK_EQ_MSG(j + 1, FFS(x), 58 "%s(%#jx) == %d != %d", __STRING(FFS), (intmax_t)x, FFS(x), j + 1); 59 } 60 } 61 62 ATF_TC_WITHOUT_HEAD(twobitneg); ATF_TC_BODY(twobitneg,tc)63 ATF_TC_BODY(twobitneg, tc) 64 { 65 const TYPE one = 1; 66 TYPE x; 67 const int n = sizeof(TYPE) * CHAR_BIT; 68 int i, j; 69 70 for (i = 0; i < n - 1; i++) 71 for (j = 0; j <= i; j++) { 72 x = one << i | one << j | TYPE_MIN; 73 ATF_CHECK_EQ_MSG(j + 1, FFS(x), 74 "%s(%#jx) == %d != %d", __STRING(FFS), (intmax_t)x, FFS(x), j + 1); 75 } 76 } 77 78 ATF_TP_ADD_TCS(tp)79 ATF_TP_ADD_TCS(tp) 80 { 81 82 ATF_TP_ADD_TC(tp, zero); 83 ATF_TP_ADD_TC(tp, twobit); 84 ATF_TP_ADD_TC(tp, twobitneg); 85 86 return (atf_no_error()); 87 } 88