/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
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â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
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â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
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#include "libc/intrin/punpckhdq.h"

/**
 * Interleaves high doublewords.
 *
 *          0    1    2    3
 *       B  aaaa bbbb CCCC DDDD
 *       C  eeee ffff GGGG HHHH
 *                    ââ¬ââ âââ¬â
 *                ââââââ     â
 *          âââââââ´ââ ââââââââ´â
 *     â A  CCCC GGGG DDDD HHHH
 *
 * @param ð [w/o] receives reduced ð and ð interleaved
 * @param ð [r/o] supplies four doublewords
 * @param ð [r/o] supplies four doublewords
 * @mayalias
 */
void(punpckhdq)(uint32_t a[4], const uint32_t b[4], const uint32_t c[4]) {
  a[0] = b[2];
  a[1] = c[2];
  a[2] = b[3];
  a[3] = c[3];
}
