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 } 156