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
have_sse42(void)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
check_crc32c(uint32_t expected,uint32_t crc32c,const void * buffer,size_t length)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);
ATF_TC_BODY(crc32c_basic_correctness,tc)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);
ATF_TC_BODY(crc32c_alignment,tc)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);
ATF_TC_BODY(crc32c_trailing_bytes,tc)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
ATF_TP_ADD_TCS(tp)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