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

// Auto-generated file. Do not edit!
//   Template: src/x8-lut/scalar.c.in
//   Generator: tools/xngen
//
// Copyright 2021 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/lut.h>
#include <xnnpack/common.h>


void xnn_x8_lut_ukernel__scalar_x4(
    size_t n,
    const uint8_t* x,
    uint8_t* y,
    const uint8_t t[restrict XNN_MIN_ELEMENTS(256)])
{
  assert(n != 0);
  assert(x != NULL);
  assert(y != NULL);

  for (; n >= 4 * sizeof(uint8_t); n -= 4 * sizeof(uint8_t)) {
    const size_t vx0 = (size_t) x[0];
    const size_t vx1 = (size_t) x[1];
    const size_t vx2 = (size_t) x[2];
    const size_t vx3 = (size_t) x[3];
    x += 4;

    const uint32_t vt0 = (uint32_t) t[vx0];
    const uint32_t vt1 = (uint32_t) t[vx1];
    const uint32_t vt2 = (uint32_t) t[vx2];
    const uint32_t vt3 = (uint32_t) t[vx3];

    y[0] = (uint8_t) vt0;
    y[1] = (uint8_t) vt1;
    y[2] = (uint8_t) vt2;
    y[3] = (uint8_t) vt3;
    y += 4;
  }
  if XNN_UNLIKELY(n != 0) {
    do {
      const size_t vx = (size_t) *x++;
      const uint32_t vt = (uint32_t) t[vx];
      *y++ = (uint8_t) vt;
      n -= sizeof(uint8_t);
    } while (n != 0);
  }
}