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
  27 #include <sys/param.h>
  28 #include <sys/gsb_crc32.h>
  29
  30 #include <stdint.h>
  31
  32 #include <atf-c.h>
  33
  34 #if defined(__amd64__) || defined(__i386__)
  35 #include <machine/cpufunc.h>
  36 #include <machine/specialreg.h>
  37
  38 static bool
  39 have_sse42(void)
  40 {
  41         u_int cpu_registers[4];
  42
  43         do_cpuid(1, cpu_registers);
  44
  45         return ((cpu_registers[2] & CPUID2_SSE42) != 0);
  46 }
  47 #endif
  48
  49 static void
  50 check_crc32c(uint32_t expected, uint32_t crc32c, const void *buffer,
  51     size_t length)
  52 {
  53         uint32_t act;
  54
  55 #if defined(__amd64__) || defined(__i386__)
  56         if (have_sse42()) {
  57                 act = sse42_crc32c(crc32c, buffer, length);
  58                 ATF_CHECK_EQ_MSG(expected, act,
  59                     "sse42_crc32c expected 0x%08x, got 0x%08x", expected, act);
  60         }
  61 #elif defined(__aarch64__)
  62         act = armv8_crc32c(crc32c, buffer, length);
  63         ATF_CHECK_EQ_MSG(expected, act,
  64             "armv8_crc32c expected 0x%08x, got 0x%08x", expected, act);
  65 #endif
  66         act = singletable_crc32c(crc32c, buffer, length);
  67         ATF_CHECK_EQ_MSG(expected, act,
  68             "singletable_crc32c expected 0x%08x, got 0x%08x", expected, act);
  69         act = multitable_crc32c(crc32c, buffer, length);
  70         ATF_CHECK_EQ_MSG(expected, act,
  71             "multitable_crc32c expected 0x%08x, got 0x%08x", expected, act);
  72 }
  73
  74 ATF_TC_WITHOUT_HEAD(crc32c_basic_correctness);
  75 ATF_TC_BODY(crc32c_basic_correctness, tc)
  76 {
  77         const uint64_t inputs[] = {
  78                 0xf408c634b3a9142,
  79                 0x80539e8c7c352e2b,
  80                 0x62e9121db6e4d649,
  81                 0x899345850ed0a286,
  82                 0x2302df11b4a43b15,
  83                 0xe943de7b3d35d70,
  84                 0xdf1ff2bf41abf56b,
  85                 0x9bc138abae315de2,
  86                 0x31cc82e56234f0ff,
  87                 0xce63c0cd6988e847,
  88                 0x3e42f6b78ee352fa,
  89                 0xfa4085436078cfa6,
  90                 0x53349558bf670a4b,
  91                 0x2714e10e7d722c61,
  92                 0xc0d3261addfc6908,
  93                 0xd1567c3181d3a1bf,
  94         };
  95         const uint32_t results[] = {
  96                 0x2ce33ede,
  97                 0xc49cc573,
  98                 0xb8683c96,
  99                 0x6918660d,
 100                 0xa904e522,
 101                 0x52dbc42c,
 102                 0x98863c22,
 103                 0x894d5d2c,
 104                 0xb003745d,
 105                 0xfc496dbd,
 106                 0x97d2fbb5,
 107                 0x3c062ef1,
 108                 0xcc2eff18,
 109                 0x6a9b09f6,
 110                 0x420242c1,
 111                 0xfd562dc3,
 112         };
 113         size_t i;
 114
 115         ATF_REQUIRE(nitems(inputs) == nitems(results));
 116
 117         for (i = 0; i < nitems(inputs); i++) {
 118                 check_crc32c(results[i], ~0u, &inputs[i], sizeof(inputs[0]));
 119         }
 120 }
 121
 122 ATF_TC_WITHOUT_HEAD(crc32c_alignment);
 123 ATF_TC_BODY(crc32c_alignment, tc)
 124 {
 125         const uint64_t input = 0xf408c634b3a9142;
 126         const uint32_t result = 0x2ce33ede;
 127         unsigned char buf[15];
 128         size_t i;
 129
 130         for (i = 1; i < 8; i++) {
 131                 memcpy(&buf[i], &input, sizeof(input));
 132                 check_crc32c(result, ~0u, &buf[i], sizeof(input));
 133         }
 134 }
 135
 136 ATF_TC_WITHOUT_HEAD(crc32c_trailing_bytes);
 137 ATF_TC_BODY(crc32c_trailing_bytes, tc)
 138 {
 139         const unsigned char input[] = {
 140                 0x87, 0x54, 0x74, 0xd2, 0xb, 0x9b, 0xdd, 0xf6, 0x68, 0x37,
 141                 0xd4, 0x4, 0x5e, 0xa9, 0xb3
 142         };
 143         const uint32_t result = 0xec638d62;
 144
 145         check_crc32c(result, ~0u, input, sizeof(input));
 146 }
 147
 148 ATF_TP_ADD_TCS(tp)
 149 {
 150
 151         ATF_TP_ADD_TC(tp, crc32c_basic_correctness);
 152         ATF_TP_ADD_TC(tp, crc32c_alignment);
 153         ATF_TP_ADD_TC(tp, crc32c_trailing_bytes);
 154         return (atf_no_error());
 155 }