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https://github.com/jart/cosmopolitan.git
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49 lines
2.8 KiB
C
49 lines
2.8 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/intrin/bits.h"
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#include "libc/calls/calls.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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void SetUpOnce(void) {
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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}
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TEST(bitreverse, test) {
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EXPECT_EQ(0xde, BITREVERSE8(123));
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EXPECT_EQ(0xde, bitreverse8(123));
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EXPECT_EQ(0xde00, BITREVERSE16(123));
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EXPECT_EQ(0xde00, bitreverse16(123));
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EXPECT_EQ(0xde000000u, bitreverse32(123));
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EXPECT_EQ(0xde00000000000000ul, bitreverse64(123));
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EXPECT_EQ(0x482d96c305f7c697ul, bitreverse64(0xe963efa0c369b412));
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}
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BENCH(bitreverse, bench) {
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EZBENCH2("BITREVERSE8", donothing,
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EXPROPRIATE(BITREVERSE8(CONCEAL("r", 123))));
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EZBENCH2("bitreverse8", donothing,
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EXPROPRIATE(bitreverse8(CONCEAL("r", 123))));
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EZBENCH2("BITREVERSE16", donothing,
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EXPROPRIATE(BITREVERSE16(CONCEAL("r", 123))));
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EZBENCH2("bitreverse32", donothing,
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EXPROPRIATE(bitreverse32(CONCEAL("r", 123))));
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EZBENCH2("bitreverse64", donothing,
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EXPROPRIATE(bitreverse64(CONCEAL("r", 123))));
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}
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