xref: /aosp_15_r20/external/XNNPACK/src/x8-zip/x4-scalar.c (revision 4bdc94577ba0e567308109d787f7fec7b531ce36)

// Copyright 2019 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.

#include <assert.h>

#include <xnnpack/zip.h>


void xnn_x8_zip_x4_ukernel__scalar(
    size_t n,
    const uint8_t* input,
    uint8_t* output)
{
  assert(n != 0);

  const uint8_t* x = input;
  const uint8_t* y = (const uint8_t*) ((uintptr_t) x + n);
  const uint8_t* z = (const uint8_t*) ((uintptr_t) y + n);
  const uint8_t* w = (const uint8_t*) ((uintptr_t) z + n);
  uint8_t* o = output;

  do {
    const uint8_t vx = *x++;
    const uint8_t vy = *y++;
    const uint8_t vz = *z++;
    const uint8_t vw = *w++;
    o[0] = vx;
    o[1] = vy;
    o[2] = vz;
    o[3] = vw;
    o += 4;

    n -= sizeof(uint8_t);
  } while (n != 0);
}