xref: /aosp_15_r20/external/XNNPACK/src/x8-lut/gen/lut-ssse3-x16.c (revision 4bdc94577ba0e567308109d787f7fec7b531ce36)

// Auto-generated file. Do not edit!
//   Template: src/x8-lut/ssse3.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 <tmmintrin.h>

#include <xnnpack/common.h>
#include <xnnpack/lut.h>
#include <xnnpack/unaligned.h>


void xnn_x8_lut_ukernel__ssse3_x16(
    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);

  const __m128i vt0 = _mm_load_si128((const __m128i*) t);
  const __m128i vt1 = _mm_load_si128((const __m128i*) (t + 16));
  const __m128i vt2 = _mm_load_si128((const __m128i*) (t + 32));
  const __m128i vt3 = _mm_load_si128((const __m128i*) (t + 48));
  const __m128i vt4 = _mm_load_si128((const __m128i*) (t + 64));
  const __m128i vt5 = _mm_load_si128((const __m128i*) (t + 80));
  const __m128i vt6 = _mm_load_si128((const __m128i*) (t + 96));
  const __m128i vt7 = _mm_load_si128((const __m128i*) (t + 112));
  const __m128i vt8 = _mm_load_si128((const __m128i*) (t + 128));
  const __m128i vt9 = _mm_load_si128((const __m128i*) (t + 144));
  const __m128i vtA = _mm_load_si128((const __m128i*) (t + 160));
  const __m128i vtB = _mm_load_si128((const __m128i*) (t + 176));
  const __m128i vtC = _mm_load_si128((const __m128i*) (t + 192));
  const __m128i vtD = _mm_load_si128((const __m128i*) (t + 208));
  const __m128i vtE = _mm_load_si128((const __m128i*) (t + 224));
  const __m128i vtF = _mm_load_si128((const __m128i*) (t + 240));

  const __m128i vtable0 = vt0;
  const __m128i vtable1 = _mm_xor_si128(vt0, vt1);
  const __m128i vtable2 = _mm_xor_si128(vt1, vt2);
  const __m128i vtable3 = _mm_xor_si128(vt2, vt3);
  const __m128i vtable4 = _mm_xor_si128(vt3, vt4);
  const __m128i vtable5 = _mm_xor_si128(vt4, vt5);
  const __m128i vtable6 = _mm_xor_si128(vt5, vt6);
  const __m128i vtable7 = _mm_xor_si128(vt6, vt7);
  const __m128i vtable8 = _mm_xor_si128(_mm_xor_si128(vt7, vt8), vtable0);
  const __m128i vtable9 = _mm_xor_si128(_mm_xor_si128(vt8, vt9), vtable1);
  const __m128i vtableA = _mm_xor_si128(_mm_xor_si128(vt9, vtA), vtable2);
  const __m128i vtableB = _mm_xor_si128(_mm_xor_si128(vtA, vtB), vtable3);
  const __m128i vtableC = _mm_xor_si128(_mm_xor_si128(vtB, vtC), vtable4);
  const __m128i vtableD = _mm_xor_si128(_mm_xor_si128(vtC, vtD), vtable5);
  const __m128i vtableE = _mm_xor_si128(_mm_xor_si128(vtD, vtE), vtable6);
  const __m128i vtableF = _mm_xor_si128(_mm_xor_si128(vtE, vtF), vtable7);

  const __m128i voffset = _mm_set1_epi8(16);
  for (; n >= 16 * sizeof(uint8_t); n -= 16 * sizeof(uint8_t)) {
    __m128i vx = _mm_loadu_si128((const __m128i*) x);
    x += 16;

    __m128i vy = _mm_shuffle_epi8(vtable0, vx);

    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable1, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable2, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable3, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable4, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable5, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable6, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable7, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable8, vx));

    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable9, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableA, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableB, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableC, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableD, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableE, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableF, vx));

    _mm_storeu_si128((__m128i*) y, vy);
    y += 16;
  }
  if XNN_UNLIKELY(n != 0) {
    __m128i vx = _mm_loadu_si128((const __m128i*) x);

    __m128i vy = _mm_shuffle_epi8(vtable0, vx);

    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable1, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable2, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable3, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable4, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable5, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable6, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable7, vx));
    vx = _mm_sub_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable8, vx));

    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtable9, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableA, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableB, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableC, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableD, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableE, vx));
    vx = _mm_subs_epi8(vx, voffset);
    vy = _mm_xor_si128(vy, _mm_shuffle_epi8(vtableF, vx));

    if (n & (8 * sizeof(uint8_t))) {
      _mm_storel_epi64((__m128i*) y, vy);
      vy = _mm_unpackhi_epi64(vy, vy);
      y += 8;
    }
    if (n & (4 * sizeof(uint8_t))) {
      unaligned_store_u32(y, (uint32_t) _mm_cvtsi128_si32(vy));
      vy = _mm_srli_epi64(vy, 32);
      y += 4;
    }
    uint32_t vy_lo = (uint32_t) _mm_cvtsi128_si32(vy);
    if (n & (2 * sizeof(uint8_t))) {
      unaligned_store_u16(y, (uint16_t) vy_lo);
      vy_lo >>= 16;
      y += 2;
    }
    if (n & (1 * sizeof(uint8_t))) {
      *y = (uint8_t) vy_lo;
    }
  }
}