cosmopolitan/test/libc/nexgen32e/crc32_test.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ This program is free software; you can redistribute it and/or modify         │
│ it under the terms of the GNU General Public License as published by         │
│ the Free Software Foundation; version 2 of the License.                      │
│                                                                              │
│ This program is distributed in the hope that it will be useful, but          │
│ WITHOUT ANY WARRANTY; without even the implied warranty of                   │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU             │
│ General Public License for more details.                                     │
│                                                                              │
│ You should have received a copy of the GNU General Public License            │
│ along with this program; if not, write to the Free Software                  │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
│ 02110-1301 USA                                                               │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
#include "libc/nexgen32e/crc32.h"
#include "libc/nexgen32e/x86feature.h"
#include "libc/str/knuthmultiplicativehash.internal.h"
#include "libc/str/str.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/hyperion.h"
#include "libc/testlib/testlib.h"
#include "third_party/zlib/zlib.h"

TEST(crc32, testBigText) {
  size_t size;
  void *hyperion;
  size = kHyperionSize;
  hyperion = kHyperion;
  EXPECT_EQ(0xe9ded8e6, crc32(0, hyperion, size));
  EXPECT_EQ(0xe9ded8e6, crc32_z(0, hyperion, size));
  if (X86_HAVE(PCLMUL)) {
    size = ROUNDDOWN(size, 64);
    EXPECT_EQ(0xc7adc04f, crc32(0, hyperion, size));
    EXPECT_EQ(0xc7adc04f, crc32_z(0, hyperion, size));
    EXPECT_EQ(0xc7adc04f,
              0xffffffffu ^ crc32$pclmul(0 ^ 0xffffffffu, hyperion, size));
  }
}

#define TESTSTR "libc/calls/typedef/sighandler_t.h"

BENCH(crc32c, bench) {
  EZBENCH2("crc32c", donothing,
           EXPROPRIATE(crc32c(0, VEIL("r", TESTSTR), sizeof(TESTSTR) - 1)));
}

BENCH(KnuthMultiplicativeHash32, bench) {
  EZBENCH2("KMP", donothing,
           EXPROPRIATE(KnuthMultiplicativeHash32(VEIL("r", TESTSTR),
                                                 sizeof(TESTSTR) - 1)));
}