mirror of
https://github.com/jart/cosmopolitan.git
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59 lines
3.2 KiB
C
59 lines
3.2 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/bits/morton.h"
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#include "libc/nexgen32e/kcpuids.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/testlib.h"
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TEST(morton, test) {
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EXPECT_EQ(0, morton(0, 0));
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EXPECT_EQ(1, morton(0, 1));
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EXPECT_EQ(2, morton(1, 0));
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EXPECT_EQ(3, morton(1, 1));
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EXPECT_EQ(4, morton(0, 2));
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EXPECT_EQ(~0ul, morton(~0ul, ~0ul));
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EXPECT_EQ(0x7ffffffffffffffdul, morton(0x7ffffffeul, 0xfffffffful));
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EXPECT_EQ(0b1010101000010101010, morton(0b0000001111, 0b1111000000));
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}
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TEST(unmorton, test) {
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EXPECT_EQ(0, unmorton(0).ax);
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EXPECT_EQ(0, unmorton(0).dx);
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EXPECT_EQ(0, unmorton(1).ax);
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EXPECT_EQ(1, unmorton(1).dx);
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EXPECT_EQ(1, unmorton(2).ax);
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EXPECT_EQ(0, unmorton(2).dx);
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EXPECT_EQ(1, unmorton(3).ax);
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EXPECT_EQ(1, unmorton(3).dx);
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EXPECT_EQ(0, unmorton(4).ax);
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EXPECT_EQ(2, unmorton(4).dx);
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EXPECT_EQ(0xffffffffu, unmorton(~0ul).ax);
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EXPECT_EQ(0xffffffffu, unmorton(~0ul).dx);
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EXPECT_EQ(0x7ffffffeul, unmorton(0x7ffffffffffffffdul).ax);
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EXPECT_EQ(0xfffffffful, unmorton(0x7ffffffffffffffdul).dx);
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EXPECT_EQ(0b0000001111000000, unmorton(0b010101010000001010101).ax);
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EXPECT_EQ(0b0000000000001111, unmorton(0b010101010000001010101).dx);
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}
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BENCH(morton, bench) {
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EZBENCH2("morton", donothing,
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EXPROPRIATE(morton(CONCEAL("r", 123), CONCEAL("r", 123))));
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EZBENCH2("unmorton", donothing, EXPROPRIATE(unmorton(CONCEAL("r", 123))));
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}
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