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https://github.com/freebsd/freebsd-src
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156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
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* Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/gsb_crc32.h>
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#include <stdint.h>
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#include <atf-c.h>
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#if defined(__amd64__) || defined(__i386__)
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#include <machine/cpufunc.h>
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#include <machine/specialreg.h>
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static bool
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have_sse42(void)
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{
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u_int cpu_registers[4];
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do_cpuid(1, cpu_registers);
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return ((cpu_registers[2] & CPUID2_SSE42) != 0);
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}
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#endif
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static void
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check_crc32c(uint32_t expected, uint32_t crc32c, const void *buffer,
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size_t length)
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{
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uint32_t act;
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#if defined(__amd64__) || defined(__i386__)
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if (have_sse42()) {
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act = sse42_crc32c(crc32c, buffer, length);
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ATF_CHECK_EQ_MSG(expected, act,
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"sse42_crc32c expected 0x%08x, got 0x%08x", expected, act);
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}
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#elif defined(__aarch64__)
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act = armv8_crc32c(crc32c, buffer, length);
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ATF_CHECK_EQ_MSG(expected, act,
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"armv8_crc32c expected 0x%08x, got 0x%08x", expected, act);
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#endif
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act = singletable_crc32c(crc32c, buffer, length);
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ATF_CHECK_EQ_MSG(expected, act,
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"singletable_crc32c expected 0x%08x, got 0x%08x", expected, act);
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act = multitable_crc32c(crc32c, buffer, length);
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ATF_CHECK_EQ_MSG(expected, act,
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"multitable_crc32c expected 0x%08x, got 0x%08x", expected, act);
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}
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ATF_TC_WITHOUT_HEAD(crc32c_basic_correctness);
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ATF_TC_BODY(crc32c_basic_correctness, tc)
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{
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const uint64_t inputs[] = {
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0xf408c634b3a9142,
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0x80539e8c7c352e2b,
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0x62e9121db6e4d649,
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0x899345850ed0a286,
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0x2302df11b4a43b15,
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0xe943de7b3d35d70,
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0xdf1ff2bf41abf56b,
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0x9bc138abae315de2,
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0x31cc82e56234f0ff,
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0xce63c0cd6988e847,
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0x3e42f6b78ee352fa,
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0xfa4085436078cfa6,
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0x53349558bf670a4b,
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0x2714e10e7d722c61,
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0xc0d3261addfc6908,
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0xd1567c3181d3a1bf,
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};
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const uint32_t results[] = {
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0x2ce33ede,
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0xc49cc573,
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0xb8683c96,
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0x6918660d,
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0xa904e522,
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0x52dbc42c,
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0x98863c22,
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0x894d5d2c,
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0xb003745d,
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0xfc496dbd,
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0x97d2fbb5,
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0x3c062ef1,
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0xcc2eff18,
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0x6a9b09f6,
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0x420242c1,
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0xfd562dc3,
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};
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size_t i;
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ATF_REQUIRE(nitems(inputs) == nitems(results));
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for (i = 0; i < nitems(inputs); i++) {
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check_crc32c(results[i], ~0u, &inputs[i], sizeof(inputs[0]));
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}
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}
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ATF_TC_WITHOUT_HEAD(crc32c_alignment);
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ATF_TC_BODY(crc32c_alignment, tc)
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{
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const uint64_t input = 0xf408c634b3a9142;
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const uint32_t result = 0x2ce33ede;
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unsigned char buf[15];
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size_t i;
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for (i = 1; i < 8; i++) {
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memcpy(&buf[i], &input, sizeof(input));
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check_crc32c(result, ~0u, &buf[i], sizeof(input));
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}
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}
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ATF_TC_WITHOUT_HEAD(crc32c_trailing_bytes);
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ATF_TC_BODY(crc32c_trailing_bytes, tc)
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{
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const unsigned char input[] = {
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0x87, 0x54, 0x74, 0xd2, 0xb, 0x9b, 0xdd, 0xf6, 0x68, 0x37,
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0xd4, 0x4, 0x5e, 0xa9, 0xb3
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};
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const uint32_t result = 0xec638d62;
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check_crc32c(result, ~0u, input, sizeof(input));
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, crc32c_basic_correctness);
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ATF_TP_ADD_TC(tp, crc32c_alignment);
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ATF_TP_ADD_TC(tp, crc32c_trailing_bytes);
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return (atf_no_error());
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}
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