mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
6a145a9262
- Add hierarchical auto-completion to redbean's repl - Fetch latest localtime() and strftime() from Eggert - Shave a few milliseconds off redbean start latency - Fix redbean repl with multi-line statements - Make the Lua unix module code more elegant - Harden Lua data structure serialization
87 lines
3.4 KiB
C
87 lines
3.4 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 2021 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/calls/strace.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/asan.internal.h"
|
|
#include "libc/macros.internal.h"
|
|
#include "libc/nexgen32e/bsr.h"
|
|
#include "libc/nexgen32e/x86feature.h"
|
|
#include "libc/runtime/runtime.h"
|
|
|
|
forceinline void longsorter(long *x, size_t n, size_t t) {
|
|
long a, b, c;
|
|
size_t i, p, q;
|
|
for (p = t; p > 0; p >>= 1) {
|
|
for (i = 0; i < n - p; ++i) {
|
|
if (!(i & p)) {
|
|
a = x[i + 0];
|
|
b = x[i + p];
|
|
if (a > b) c = a, a = b, b = c;
|
|
x[i + 0] = a;
|
|
x[i + p] = b;
|
|
}
|
|
}
|
|
for (q = t; q > p; q >>= 1) {
|
|
for (i = 0; i < n - q; ++i) {
|
|
if (!(i & p)) {
|
|
a = x[i + p];
|
|
b = x[i + q];
|
|
if (a > b) c = a, a = b, b = c;
|
|
x[i + p] = a;
|
|
x[i + q] = b;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static microarchitecture("avx2") optimizespeed noasan
|
|
void longsort_avx2(long *x, size_t n, size_t t) {
|
|
longsorter(x, n, t);
|
|
}
|
|
|
|
static optimizesize noasan void longsort_pure(long *x, size_t n, size_t t) {
|
|
longsorter(x, n, t);
|
|
}
|
|
|
|
/**
|
|
* Sorting algorithm for longs that doesn't take long.
|
|
*
|
|
* "What disorder is this? Give me my long sort!"
|
|
* -Lord Capulet
|
|
*
|
|
*/
|
|
void longsort(long *x, size_t n) {
|
|
size_t t, m;
|
|
if (IsAsan()) {
|
|
if (__builtin_mul_overflow(n, sizeof(long), &m)) m = -1;
|
|
__asan_verify(x, m);
|
|
}
|
|
if (n > 1) {
|
|
t = 1ul << bsrl(n - 1);
|
|
if (!IsTiny() && X86_HAVE(AVX2)) {
|
|
longsort_avx2(x, n, t);
|
|
} else {
|
|
longsort_pure(x, n, t);
|
|
}
|
|
}
|
|
if (n > 1000) {
|
|
STRACE("longsort(%p, %'zu)", x, n);
|
|
}
|
|
}
|