tests/sys/kern/libkern_crc32.c

   1 /*
   2  * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD$
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/gsb_crc32.h>
  31
  32 #include <stdint.h>
  33
  34 #include <atf-c.h>
  35
  36 #if !defined(__amd64__) && !defined(__i386__) && !defined(__aarch64__)
  37 #error These tests are not supported on this platform
  38 #endif
  39
  40 ATF_TC_WITHOUT_HEAD(crc32c_basic_correctness);
  41 ATF_TC_BODY(crc32c_basic_correctness, tc)
  42 {
  43         const uint64_t inputs[] = {
  44                 0xf408c634b3a9142,
  45                 0x80539e8c7c352e2b,
  46                 0x62e9121db6e4d649,
  47                 0x899345850ed0a286,
  48                 0x2302df11b4a43b15,
  49                 0xe943de7b3d35d70,
  50                 0xdf1ff2bf41abf56b,
  51                 0x9bc138abae315de2,
  52                 0x31cc82e56234f0ff,
  53                 0xce63c0cd6988e847,
  54                 0x3e42f6b78ee352fa,
  55                 0xfa4085436078cfa6,
  56                 0x53349558bf670a4b,
  57                 0x2714e10e7d722c61,
  58                 0xc0d3261addfc6908,
  59                 0xd1567c3181d3a1bf,
  60         };
  61         const uint32_t results[] = {
  62                 0x2ce33ede,
  63                 0xc49cc573,
  64                 0xb8683c96,
  65                 0x6918660d,
  66                 0xa904e522,
  67                 0x52dbc42c,
  68                 0x98863c22,
  69                 0x894d5d2c,
  70                 0xb003745d,
  71                 0xfc496dbd,
  72                 0x97d2fbb5,
  73                 0x3c062ef1,
  74                 0xcc2eff18,
  75                 0x6a9b09f6,
  76                 0x420242c1,
  77                 0xfd562dc3,
  78         };
  79         size_t i;
  80         uint32_t act;
  81
  82         ATF_REQUIRE(nitems(inputs) == nitems(results));
  83
  84         for (i = 0; i < nitems(inputs); i++) {
  85 #if defined(__amd64__) || defined(__i386__)
  86                 act = sse42_crc32c(~0, (const void *)&inputs[i],
  87                     sizeof(inputs[0]));
  88 #else
  89                 act = armv8_crc32c(~0, (const void *)&inputs[i],
  90                     sizeof(inputs[0]));
  91 #endif
  92                 ATF_REQUIRE_MSG(act == results[i],
  93                     "crc32c(0x%jx) = 0x%08x, got 0x%08x", (uintmax_t)inputs[i],
  94                     results[i], act);
  95         }
  96 }
  97
  98 ATF_TC_WITHOUT_HEAD(crc32c_alignment);
  99 ATF_TC_BODY(crc32c_alignment, tc)
 100 {
 101         const uint64_t input = 0xf408c634b3a9142;
 102         const uint32_t result = 0x2ce33ede;
 103         unsigned char buf[15];
 104         size_t i;
 105         uint32_t act;
 106
 107
 108         for (i = 1; i < 8; i++) {
 109                 memcpy(&buf[i], &input, sizeof(input));
 110
 111 #if defined(__amd64__) || defined(__i386__)
 112                 act = sse42_crc32c(~0, (const void *)&buf[i], sizeof(input));
 113 #else
 114                 act = armv8_crc32c(~0, (const void *)&buf[i], sizeof(input));
 115 #endif
 116                 ATF_REQUIRE_MSG(act == result,
 117                     "crc32c(0x%jx) = 0x%08x, got 0x%08x", (uintmax_t)input,
 118                     result, act);
 119         }
 120 }
 121
 122 ATF_TC_WITHOUT_HEAD(crc32c_trailing_bytes);
 123 ATF_TC_BODY(crc32c_trailing_bytes, tc)
 124 {
 125         const unsigned char input[] = {
 126                 0x87, 0x54, 0x74, 0xd2, 0xb, 0x9b, 0xdd, 0xf6, 0x68, 0x37,
 127                 0xd4, 0x4, 0x5e, 0xa9, 0xb3
 128         };
 129         const uint32_t result = 0xec638d62;
 130         uint32_t act;
 131
 132 #if defined(__amd64__) || defined(__i386__)
 133         act = sse42_crc32c(~0, input, sizeof(input));
 134 #else
 135         act = armv8_crc32c(~0, input, sizeof(input));
 136 #endif
 137         ATF_REQUIRE_MSG(act == result, "expected 0x%08x, got 0x%08x", result,
 138             act);
 139 }
 140
 141 ATF_TP_ADD_TCS(tp)
 142 {
 143
 144         ATF_TP_ADD_TC(tp, crc32c_basic_correctness);
 145         ATF_TP_ADD_TC(tp, crc32c_alignment);
 146         ATF_TP_ADD_TC(tp, crc32c_trailing_bytes);
 147         return (atf_no_error());
 148 }