mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
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 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/bits/bits.h"
|
|
#include "libc/testlib/ezbench.h"
|
|
#include "libc/testlib/testlib.h"
|
|
|
|
#define L(x) ((int64_t)(x))
|
|
#define S(x) ((int128_t)(x))
|
|
#define U(x) ((uint128_t)(x))
|
|
|
|
TEST(division, testUnsigned) {
|
|
volatile uint128_t x;
|
|
x = U(1000000000123123123);
|
|
EXPECT_EQ(U(20769187431582143), (U(1125899906842624) << 64) / x);
|
|
x = U(42);
|
|
EXPECT_EQ((U(26807140639110) << 64) | U(1756832768924719201),
|
|
(U(1125899906842624) << 64) / x);
|
|
}
|
|
|
|
TEST(division, testSigned) {
|
|
volatile int128_t x;
|
|
x = S(1000000000123123123);
|
|
EXPECT_EQ(S(20769187431582143), (S(1125899906842624) << 64) / x);
|
|
x = S(42);
|
|
EXPECT_EQ(S(26807140639110) << 64 | S(1756832768924719201),
|
|
(S(1125899906842624) << 64) / x);
|
|
}
|