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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
48 lines
2.6 KiB
C
48 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/punpcklwd.h"
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/**
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* Interleaves low words.
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*
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* 0 1 2 3 4 5 6 7
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* B AA BB CC DD ee ff gg hh
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* C II JJ KK LL mm nn oo pp
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* ├┘ ├┘ ├┘ ├┘
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* │ │ │ └────────┐
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* │ │ └─────┐ │
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* │ └──┐ │ │
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* ├───┐ ├───┐ ├───┐ ├───┐
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* → A AA II BB JJ CC KK DD LL
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*
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* @param 𝑎 [w/o] receives reduced 𝑏 and 𝑐 interleaved
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* @param 𝑏 [r/o] supplies eight words
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* @param 𝑐 [r/o] supplies eight words
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* @mayalias
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*/
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void(punpcklwd)(uint16_t a[8], const uint16_t b[8], const uint16_t c[8]) {
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a[7] = c[3];
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a[6] = b[3];
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a[5] = c[2];
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a[4] = b[2];
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a[3] = c[1];
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a[2] = b[1];
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a[1] = c[0];
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a[0] = b[0];
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}
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