mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
91 lines
4.4 KiB
C
91 lines
4.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dce.h"
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#include "libc/mem/gc.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/nexgen32e/crc32.h"
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#include "libc/nexgen32e/x86feature.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/hyperion.h"
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#include "libc/testlib/testlib.h"
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#include "third_party/zlib/zlib.h"
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#define FANATICS "Fanatics"
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static const char hyperion[] =
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FANATICS " have their dreams, wherewith they weave / "
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"A paradise for a sect; the savage too / "
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"From forth the loftiest fashion of his sleep / "
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"...";
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TEST(crc32c, test) {
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EXPECT_EQ(0, crc32c(0, "", 0));
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EXPECT_EQ(crc32c(0, "hello", 5), crc32c(0, "hello", 5));
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EXPECT_EQ(0xe3069283, crc32c(0, "123456789", 9));
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EXPECT_EQ(0x6d6eefba, crc32c(0, hyperion, strlen(hyperion)));
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EXPECT_EQ(0x6d6eefba, crc32c(crc32c(0, FANATICS, strlen(FANATICS)),
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hyperion + strlen(FANATICS),
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strlen(hyperion) - strlen(FANATICS)));
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EXPECT_EQ(0xf372f045, crc32c(0, hyperion + 1, strlen(hyperion) - 1));
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EXPECT_EQ(0x5aaad5f8, crc32c(0, hyperion + 7, strlen(hyperion) - 7));
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EXPECT_EQ(0xf8e51ea6, crc32c(0, hyperion + 7, strlen(hyperion) - 8));
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EXPECT_EQ(0xecc9871d, crc32c(0, kHyperion, kHyperionSize));
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}
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dontinline uint64_t fnv_hash(char *s, int len) {
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uint64_t hash = 0xcbf29ce484222325;
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for (int i = 0; i < len; i++) {
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hash *= 0x100000001b3;
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hash ^= (unsigned char)s[i];
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}
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return hash;
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}
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static unsigned KMH(const void *p, unsigned long n) {
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unsigned h, i;
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for (h = i = 0; i < n; i++) {
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h += ((unsigned char *)p)[i];
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h *= 0x9e3779b1;
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}
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return MAX(1, h);
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}
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BENCH(crc32c, bench) {
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for (int i = 1; i < 256; i *= 2) {
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EZBENCH_N("crc32c", i, __expropriate(crc32c(0, kHyperion, i)));
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EZBENCH_N("crc32_z", i, __expropriate(crc32_z(0, kHyperion, i)));
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EZBENCH_N("fnv_hash", i,
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__expropriate(fnv_hash(__veil("r", kHyperion), __veil("r", i))));
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EZBENCH_N("KMH", i,
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__expropriate(KMH(__veil("r", kHyperion), __veil("r", i))));
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fprintf(stderr, "\n");
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}
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EZBENCH_N("crc32c", kHyperionSize,
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__expropriate(crc32c(0, kHyperion, kHyperionSize)));
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EZBENCH_N("crc32_z", kHyperionSize,
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__expropriate(crc32_z(0, kHyperion, kHyperionSize)));
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EZBENCH_N("fnv_hash", kHyperionSize,
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__expropriate(
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fnv_hash(__veil("r", kHyperion), __veil("r", kHyperionSize))));
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EZBENCH_N(
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"KMH", kHyperionSize,
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__expropriate(KMH(__veil("r", kHyperion), __veil("r", kHyperionSize))));
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}
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