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43 lines
2.5 KiB
C
43 lines
2.5 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/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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#define L(x) ((int64_t)(x))
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#define S(x) ((int128_t)(x))
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#define U(x) ((uint128_t)(x))
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TEST(division, testUnsigned) {
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volatile uint128_t x;
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x = U(1000000000123123123);
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EXPECT_EQ(U(20769187431582143), (U(1125899906842624) << 64) / x);
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x = U(42);
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EXPECT_EQ((U(26807140639110) << 64) | U(1756832768924719201),
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(U(1125899906842624) << 64) / x);
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}
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TEST(division, testSigned) {
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volatile int128_t x;
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x = S(1000000000123123123);
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EXPECT_EQ(S(20769187431582143), (S(1125899906842624) << 64) / x);
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x = S(42);
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EXPECT_EQ(S(26807140639110) << 64 | S(1756832768924719201),
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(S(1125899906842624) << 64) / x);
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}
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