61 lines
3.3 KiB
C
61 lines
3.3 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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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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