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NetBSD/tests/include/sys/t_bitops.c

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/* $NetBSD: t_bitops.c,v 1.19 2015/03/21 05:50:19 isaki Exp $ */
/*-
* Copyright (c) 2011, 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas and Jukka Ruohonen.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
__RCSID("$NetBSD: t_bitops.c,v 1.19 2015/03/21 05:50:19 isaki Exp $");
#include <atf-c.h>
#include <sys/cdefs.h>
#include <sys/bitops.h>
#include <math.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
static const struct {
uint32_t val;
int ffs;
int fls;
} bits[] = {
{ 0x00, 0, 0 }, { 0x01, 1, 1 }, { 0x02, 2, 2 }, { 0x03, 1, 2 },
{ 0x04, 3, 3 }, { 0x05, 1, 3 }, { 0x06, 2, 3 }, { 0x07, 1, 3 },
{ 0x08, 4, 4 }, { 0x09, 1, 4 }, { 0x0A, 2, 4 }, { 0x0B, 1, 4 },
{ 0x0C, 3, 4 }, { 0x0D, 1, 4 }, { 0x0E, 2, 4 }, { 0x0F, 1, 4 },
{ 0x10, 5, 5 }, { 0x11, 1, 5 }, { 0x12, 2, 5 }, { 0x13, 1, 5 },
{ 0x14, 3, 5 }, { 0x15, 1, 5 }, { 0x16, 2, 5 }, { 0x17, 1, 5 },
{ 0x18, 4, 5 }, { 0x19, 1, 5 }, { 0x1A, 2, 5 }, { 0x1B, 1, 5 },
{ 0x1C, 3, 5 }, { 0x1D, 1, 5 }, { 0x1E, 2, 5 }, { 0x1F, 1, 5 },
{ 0xF0, 5, 8 }, { 0xF1, 1, 8 }, { 0xF2, 2, 8 }, { 0xF3, 1, 8 },
{ 0xF4, 3, 8 }, { 0xF5, 1, 8 }, { 0xF6, 2, 8 }, { 0xF7, 1, 8 },
{ 0xF8, 4, 8 }, { 0xF9, 1, 8 }, { 0xFA, 2, 8 }, { 0xFB, 1, 8 },
{ 0xFC, 3, 8 }, { 0xFD, 1, 8 }, { 0xFE, 2, 8 }, { 0xFF, 1, 8 },
};
ATF_TC(bitmap_basic);
ATF_TC_HEAD(bitmap_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic test of __BITMAP_*");
}
ATF_TC_BODY(bitmap_basic, tc)
{
__BITMAP_TYPE(, uint32_t, 65536) bm;
__BITMAP_ZERO(&bm);
ATF_REQUIRE(__BITMAP_SIZE(uint32_t, 65536) == 2048);
ATF_REQUIRE(__BITMAP_SHIFT(uint32_t) == 5);
ATF_REQUIRE(__BITMAP_MASK(uint32_t) == 31);
for (size_t i = 0; i < 65536; i += 2)
__BITMAP_SET(i, &bm);
for (size_t i = 0; i < 2048; i++)
ATF_REQUIRE(bm._b[i] == 0x55555555);
for (size_t i = 0; i < 65536; i++)
if (i & 1)
ATF_REQUIRE(!__BITMAP_ISSET(i, &bm));
else {
ATF_REQUIRE(__BITMAP_ISSET(i, &bm));
__BITMAP_CLR(i, &bm);
}
for (size_t i = 0; i < 65536; i += 2)
ATF_REQUIRE(!__BITMAP_ISSET(i, &bm));
}
ATF_TC(fast_divide32);
ATF_TC_HEAD(fast_divide32, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic test of fast_divide32(3)");
}
ATF_TC_BODY(fast_divide32, tc)
{
uint32_t a, b, q, r, m;
uint8_t i, s1, s2;
a = 0xFFFF;
b = 0x000F;
fast_divide32_prepare(b, &m, &s1, &s2);
q = fast_divide32(a, b, m, s1, s2);
r = fast_remainder32(a, b, m, s1, s2);
ATF_REQUIRE(q == 0x1111 && r == 0);
for (i = 1; i < __arraycount(bits); i++) {
a = bits[i].val;
b = bits[i].ffs;
fast_divide32_prepare(b, &m, &s1, &s2);
q = fast_divide32(a, b, m, s1, s2);
r = fast_remainder32(a, b, m, s1, s2);
ATF_REQUIRE(q == a / b);
ATF_REQUIRE(r == a % b);
}
}
ATF_TC(ffsfls);
ATF_TC_HEAD(ffsfls, tc)
{
atf_tc_set_md_var(tc, "descr", "Test ffs32(3)-family for correctness");
}
ATF_TC_BODY(ffsfls, tc)
{
uint8_t i;
ATF_REQUIRE(ffs32(0) == 0x00);
ATF_REQUIRE(fls32(0) == 0x00);
ATF_REQUIRE(ffs64(0) == 0x00);
ATF_REQUIRE(fls64(0) == 0x00);
ATF_REQUIRE(ffs32(UINT32_MAX) == 0x01);
ATF_REQUIRE(fls32(UINT32_MAX) == 0x20);
ATF_REQUIRE(ffs64(UINT64_MAX) == 0x01);
ATF_REQUIRE(fls64(UINT64_MAX) == 0x40);
for (i = 1; i < __arraycount(bits); i++) {
ATF_REQUIRE(ffs32(bits[i].val) == bits[i].ffs);
ATF_REQUIRE(fls32(bits[i].val) == bits[i].fls);
ATF_REQUIRE(ffs64(bits[i].val) == bits[i].ffs);
ATF_REQUIRE(fls64(bits[i].val) == bits[i].fls);
ATF_REQUIRE(ffs32(bits[i].val << 1) == bits[i].ffs + 1);
ATF_REQUIRE(fls32(bits[i].val << 1) == bits[i].fls + 1);
ATF_REQUIRE(ffs64(bits[i].val << 1) == bits[i].ffs + 1);
ATF_REQUIRE(fls64(bits[i].val << 1) == bits[i].fls + 1);
ATF_REQUIRE(ffs32(bits[i].val << 9) == bits[i].ffs + 9);
ATF_REQUIRE(fls32(bits[i].val << 9) == bits[i].fls + 9);
ATF_REQUIRE(ffs64(bits[i].val << 9) == bits[i].ffs + 9);
ATF_REQUIRE(fls64(bits[i].val << 9) == bits[i].fls + 9);
}
}
ATF_TC(ilog2_32bit);
ATF_TC_HEAD(ilog2_32bit, tc)
{
atf_tc_set_md_var(tc, "descr", "Test ilog2(3) for 32bit variable");
}
ATF_TC_BODY(ilog2_32bit, tc)
{
int i;
uint32_t x;
for (i = 0; i < 32; i++) {
x = 1 << i;
ATF_REQUIRE(ilog2(x) == i);
}
}
ATF_TC(ilog2_64bit);
ATF_TC_HEAD(ilog2_64bit, tc)
{
atf_tc_set_md_var(tc, "descr", "Test ilog2(3) for 64bit variable");
}
ATF_TC_BODY(ilog2_64bit, tc)
{
int i;
uint64_t x;
for (i = 0; i < 64; i++) {
x = ((uint64_t)1) << i;
ATF_REQUIRE(ilog2(x) == i);
}
}
ATF_TC(ilog2_const);
ATF_TC_HEAD(ilog2_const, tc)
{
atf_tc_set_md_var(tc, "descr", "Test ilog2(3) for constant");
}
ATF_TC_BODY(ilog2_const, tc)
{
/*
* These inlines test __builtin_constant_p() part of ilog2()
* at compile time, so don't change it to loop. PR lib/49745
*/
ATF_REQUIRE(ilog2(0x0000000000000001ULL) == 0);
ATF_REQUIRE(ilog2(0x0000000000000002ULL) == 1);
ATF_REQUIRE(ilog2(0x0000000000000004ULL) == 2);
ATF_REQUIRE(ilog2(0x0000000000000008ULL) == 3);
ATF_REQUIRE(ilog2(0x0000000000000010ULL) == 4);
ATF_REQUIRE(ilog2(0x0000000000000020ULL) == 5);
ATF_REQUIRE(ilog2(0x0000000000000040ULL) == 6);
ATF_REQUIRE(ilog2(0x0000000000000080ULL) == 7);
ATF_REQUIRE(ilog2(0x0000000000000100ULL) == 8);
ATF_REQUIRE(ilog2(0x0000000000000200ULL) == 9);
ATF_REQUIRE(ilog2(0x0000000000000400ULL) == 10);
ATF_REQUIRE(ilog2(0x0000000000000800ULL) == 11);
ATF_REQUIRE(ilog2(0x0000000000001000ULL) == 12);
ATF_REQUIRE(ilog2(0x0000000000002000ULL) == 13);
ATF_REQUIRE(ilog2(0x0000000000004000ULL) == 14);
ATF_REQUIRE(ilog2(0x0000000000008000ULL) == 15);
ATF_REQUIRE(ilog2(0x0000000000010000ULL) == 16);
ATF_REQUIRE(ilog2(0x0000000000020000ULL) == 17);
ATF_REQUIRE(ilog2(0x0000000000040000ULL) == 18);
ATF_REQUIRE(ilog2(0x0000000000080000ULL) == 19);
ATF_REQUIRE(ilog2(0x0000000000100000ULL) == 20);
ATF_REQUIRE(ilog2(0x0000000000200000ULL) == 21);
ATF_REQUIRE(ilog2(0x0000000000400000ULL) == 22);
ATF_REQUIRE(ilog2(0x0000000000800000ULL) == 23);
ATF_REQUIRE(ilog2(0x0000000001000000ULL) == 24);
ATF_REQUIRE(ilog2(0x0000000002000000ULL) == 25);
ATF_REQUIRE(ilog2(0x0000000004000000ULL) == 26);
ATF_REQUIRE(ilog2(0x0000000008000000ULL) == 27);
ATF_REQUIRE(ilog2(0x0000000010000000ULL) == 28);
ATF_REQUIRE(ilog2(0x0000000020000000ULL) == 29);
ATF_REQUIRE(ilog2(0x0000000040000000ULL) == 30);
ATF_REQUIRE(ilog2(0x0000000080000000ULL) == 31);
ATF_REQUIRE(ilog2(0x0000000100000000ULL) == 32);
ATF_REQUIRE(ilog2(0x0000000200000000ULL) == 33);
ATF_REQUIRE(ilog2(0x0000000400000000ULL) == 34);
ATF_REQUIRE(ilog2(0x0000000800000000ULL) == 35);
ATF_REQUIRE(ilog2(0x0000001000000000ULL) == 36);
ATF_REQUIRE(ilog2(0x0000002000000000ULL) == 37);
ATF_REQUIRE(ilog2(0x0000004000000000ULL) == 38);
ATF_REQUIRE(ilog2(0x0000008000000000ULL) == 39);
ATF_REQUIRE(ilog2(0x0000010000000000ULL) == 40);
ATF_REQUIRE(ilog2(0x0000020000000000ULL) == 41);
ATF_REQUIRE(ilog2(0x0000040000000000ULL) == 42);
ATF_REQUIRE(ilog2(0x0000080000000000ULL) == 43);
ATF_REQUIRE(ilog2(0x0000100000000000ULL) == 44);
ATF_REQUIRE(ilog2(0x0000200000000000ULL) == 45);
ATF_REQUIRE(ilog2(0x0000400000000000ULL) == 46);
ATF_REQUIRE(ilog2(0x0000800000000000ULL) == 47);
ATF_REQUIRE(ilog2(0x0001000000000000ULL) == 48);
ATF_REQUIRE(ilog2(0x0002000000000000ULL) == 49);
ATF_REQUIRE(ilog2(0x0004000000000000ULL) == 50);
ATF_REQUIRE(ilog2(0x0008000000000000ULL) == 51);
ATF_REQUIRE(ilog2(0x0010000000000000ULL) == 52);
ATF_REQUIRE(ilog2(0x0020000000000000ULL) == 53);
ATF_REQUIRE(ilog2(0x0040000000000000ULL) == 54);
ATF_REQUIRE(ilog2(0x0080000000000000ULL) == 55);
ATF_REQUIRE(ilog2(0x0100000000000000ULL) == 56);
ATF_REQUIRE(ilog2(0x0200000000000000ULL) == 57);
ATF_REQUIRE(ilog2(0x0400000000000000ULL) == 58);
ATF_REQUIRE(ilog2(0x0800000000000000ULL) == 59);
ATF_REQUIRE(ilog2(0x1000000000000000ULL) == 60);
ATF_REQUIRE(ilog2(0x2000000000000000ULL) == 61);
ATF_REQUIRE(ilog2(0x4000000000000000ULL) == 62);
ATF_REQUIRE(ilog2(0x8000000000000000ULL) == 63);
ATF_REQUIRE(ilog2(0x0000000000000003ULL) == 1);
ATF_REQUIRE(ilog2(0x0000000000000007ULL) == 2);
ATF_REQUIRE(ilog2(0x000000000000000fULL) == 3);
ATF_REQUIRE(ilog2(0x000000000000001fULL) == 4);
ATF_REQUIRE(ilog2(0x000000000000003fULL) == 5);
ATF_REQUIRE(ilog2(0x000000000000007fULL) == 6);
ATF_REQUIRE(ilog2(0x00000000000000ffULL) == 7);
ATF_REQUIRE(ilog2(0x00000000000001ffULL) == 8);
ATF_REQUIRE(ilog2(0x00000000000003ffULL) == 9);
ATF_REQUIRE(ilog2(0x00000000000007ffULL) == 10);
ATF_REQUIRE(ilog2(0x0000000000000fffULL) == 11);
ATF_REQUIRE(ilog2(0x0000000000001fffULL) == 12);
ATF_REQUIRE(ilog2(0x0000000000003fffULL) == 13);
ATF_REQUIRE(ilog2(0x0000000000007fffULL) == 14);
ATF_REQUIRE(ilog2(0x000000000000ffffULL) == 15);
ATF_REQUIRE(ilog2(0x000000000001ffffULL) == 16);
ATF_REQUIRE(ilog2(0x000000000003ffffULL) == 17);
ATF_REQUIRE(ilog2(0x000000000007ffffULL) == 18);
ATF_REQUIRE(ilog2(0x00000000000fffffULL) == 19);
ATF_REQUIRE(ilog2(0x00000000001fffffULL) == 20);
ATF_REQUIRE(ilog2(0x00000000003fffffULL) == 21);
ATF_REQUIRE(ilog2(0x00000000007fffffULL) == 22);
ATF_REQUIRE(ilog2(0x0000000000ffffffULL) == 23);
ATF_REQUIRE(ilog2(0x0000000001ffffffULL) == 24);
ATF_REQUIRE(ilog2(0x0000000003ffffffULL) == 25);
ATF_REQUIRE(ilog2(0x0000000007ffffffULL) == 26);
ATF_REQUIRE(ilog2(0x000000000fffffffULL) == 27);
ATF_REQUIRE(ilog2(0x000000001fffffffULL) == 28);
ATF_REQUIRE(ilog2(0x000000003fffffffULL) == 29);
ATF_REQUIRE(ilog2(0x000000007fffffffULL) == 30);
ATF_REQUIRE(ilog2(0x00000000ffffffffULL) == 31);
ATF_REQUIRE(ilog2(0x00000001ffffffffULL) == 32);
ATF_REQUIRE(ilog2(0x00000003ffffffffULL) == 33);
ATF_REQUIRE(ilog2(0x00000007ffffffffULL) == 34);
ATF_REQUIRE(ilog2(0x0000000fffffffffULL) == 35);
ATF_REQUIRE(ilog2(0x0000001fffffffffULL) == 36);
ATF_REQUIRE(ilog2(0x0000003fffffffffULL) == 37);
ATF_REQUIRE(ilog2(0x0000007fffffffffULL) == 38);
ATF_REQUIRE(ilog2(0x000000ffffffffffULL) == 39);
ATF_REQUIRE(ilog2(0x000001ffffffffffULL) == 40);
ATF_REQUIRE(ilog2(0x000003ffffffffffULL) == 41);
ATF_REQUIRE(ilog2(0x000007ffffffffffULL) == 42);
ATF_REQUIRE(ilog2(0x00000fffffffffffULL) == 43);
ATF_REQUIRE(ilog2(0x00001fffffffffffULL) == 44);
ATF_REQUIRE(ilog2(0x00003fffffffffffULL) == 45);
ATF_REQUIRE(ilog2(0x00007fffffffffffULL) == 46);
ATF_REQUIRE(ilog2(0x0000ffffffffffffULL) == 47);
ATF_REQUIRE(ilog2(0x0001ffffffffffffULL) == 48);
ATF_REQUIRE(ilog2(0x0003ffffffffffffULL) == 49);
ATF_REQUIRE(ilog2(0x0007ffffffffffffULL) == 50);
ATF_REQUIRE(ilog2(0x000fffffffffffffULL) == 51);
ATF_REQUIRE(ilog2(0x001fffffffffffffULL) == 52);
ATF_REQUIRE(ilog2(0x003fffffffffffffULL) == 53);
ATF_REQUIRE(ilog2(0x007fffffffffffffULL) == 54);
ATF_REQUIRE(ilog2(0x00ffffffffffffffULL) == 55);
ATF_REQUIRE(ilog2(0x01ffffffffffffffULL) == 56);
ATF_REQUIRE(ilog2(0x03ffffffffffffffULL) == 57);
ATF_REQUIRE(ilog2(0x07ffffffffffffffULL) == 58);
ATF_REQUIRE(ilog2(0x0fffffffffffffffULL) == 59);
ATF_REQUIRE(ilog2(0x1fffffffffffffffULL) == 60);
ATF_REQUIRE(ilog2(0x3fffffffffffffffULL) == 61);
ATF_REQUIRE(ilog2(0x7fffffffffffffffULL) == 62);
ATF_REQUIRE(ilog2(0xffffffffffffffffULL) == 63);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, bitmap_basic);
ATF_TP_ADD_TC(tp, fast_divide32);
ATF_TP_ADD_TC(tp, ffsfls);
ATF_TP_ADD_TC(tp, ilog2_32bit);
ATF_TP_ADD_TC(tp, ilog2_64bit);
ATF_TP_ADD_TC(tp, ilog2_const);
return atf_no_error();
}
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