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cosmopolitan/libc/intrin/mpsadbw.c

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Initial import
2020-06-15 14:18:57 +00:00
/*-*- 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 │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
Make improvements - Emulator can now test the αcτµαlly pδrταblε εxεcµταblε bootloader - Whipped up a webserver named redbean. It services 150k requests per second on a single core. Bundling assets inside zip enables extremely fast serving for two reasons. The first is that zip central directory lookups go faster than stat() system calls. The second is that both zip and gzip content-encoding use DEFLATE, therefore, compressed responses can be served via the sendfile() system call which does an in-kernel copy directly from the zip executable structure. Also note that red bean zip executables can be deployed easily to all platforms, since these native executables work on Linux, Mac, BSD, and Windows. - Address sanitizer now works very well
2020-09-07 04:39:00 +00:00
#include "libc/intrin/mpsadbw.h"
#include "libc/macros.h"
#include "libc/str/str.h"
Initial import
2020-06-15 14:18:57 +00:00
Make improvements - Emulator can now test the αcτµαlly pδrταblε εxεcµταblε bootloader - Whipped up a webserver named redbean. It services 150k requests per second on a single core. Bundling assets inside zip enables extremely fast serving for two reasons. The first is that zip central directory lookups go faster than stat() system calls. The second is that both zip and gzip content-encoding use DEFLATE, therefore, compressed responses can be served via the sendfile() system call which does an in-kernel copy directly from the zip executable structure. Also note that red bean zip executables can be deployed easily to all platforms, since these native executables work on Linux, Mac, BSD, and Windows. - Address sanitizer now works very well
2020-09-07 04:39:00 +00:00
/**
* Computes multiple sum of absolute differences.
*
* This appears to be intended for video encoding motion estimation. It
* can be combined with phminposuw. That allows us to search for an int
* overlapping inside 𝑏 that's nearest to an aligned int in 𝑎.
*
* @note goes fast w/ sse4 cf. core c. 2006 cf. bulldozer c. 2011
* @mayalias
*/
void(mpsadbw)(uint16_t c[8], const uint8_t b[16], const uint8_t a[16],
uint8_t control) {
unsigned i, j;
uint16_t r[8];
for (i = 0; i < 8; ++i) {
r[i] = 0;
for (j = 0; j < 4; ++j) {
r[i] += ABS(b[(control & 4) + i + j] - a[(control & 3) * 4 + j]);
}
Initial import
2020-06-15 14:18:57 +00:00
}
Make improvements - Emulator can now test the αcτµαlly pδrταblε εxεcµταblε bootloader - Whipped up a webserver named redbean. It services 150k requests per second on a single core. Bundling assets inside zip enables extremely fast serving for two reasons. The first is that zip central directory lookups go faster than stat() system calls. The second is that both zip and gzip content-encoding use DEFLATE, therefore, compressed responses can be served via the sendfile() system call which does an in-kernel copy directly from the zip executable structure. Also note that red bean zip executables can be deployed easily to all platforms, since these native executables work on Linux, Mac, BSD, and Windows. - Address sanitizer now works very well
2020-09-07 04:39:00 +00:00
memcpy(c, r, 16);
Initial import
2020-06-15 14:18:57 +00:00
}