/*-*- 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/intrin/punpcklbw.h" /** * Interleaves low bytes. * * 0 1 2 3 4 5 6 7 8 9 A B C D E F * B A B C D E F G H i j k l m n o p * C Q R S T U V W X y z α σ π μ τ ε * │ │ │ │ │ │ │ │ * │ │ │ └─────┐ * │ │ └───┐ │ etc... * │ └─┐ │ │ * ├─┐ ├─┐ ├─┐ ├─┐ * → A A Q B R C S D T E U F V G W H X * * @param 𝑎 [w/o] receives reduced 𝑏 and 𝑐 interleaved * @param 𝑏 [r/o] supplies eight words * @param 𝑐 [r/o] supplies eight words * @mayalias */ void(punpcklbw)(uint8_t a[16], const uint8_t b[16], const uint8_t c[16]) { a[0xf] = c[7]; a[0xe] = b[7]; a[0xd] = c[6]; a[0xc] = b[6]; a[0xb] = c[5]; a[0xa] = b[5]; a[0x9] = c[4]; a[0x8] = b[4]; a[0x7] = c[3]; a[0x6] = b[3]; a[0x5] = c[2]; a[0x4] = b[2]; a[0x3] = c[1]; a[0x2] = b[1]; a[0x1] = c[0]; a[0x0] = b[0]; }