src/amalgam/ssse3.c

// 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 <immintrin.h>

#include <xnnpack/common.h>
#include <xnnpack/dwconv.h>
#include <xnnpack/math.h>
#include <xnnpack/unaligned.h>
#include <xnnpack/vcvt.h>
#include <xnnpack/vlrelu.h>


void xnn_f32_dwconv2d_chw_ukernel_3x3p1__ssse3_2x4_acc2(
    size_t input_height,
    size_t input_width,
    const float* input,
    const float* weights,
    const float* zero,
    float* output,
    uint32_t padding_top,
    const union xnn_f32_chw_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(input_height != 0);
  assert(input_width != 0);
  assert(input_width % sizeof(float) == 0);
  assert(padding_top == 1);

  const __m128 vmask = _mm_load_ps((const float*) params->sse.mask);
  const __m128 vmax = _mm_load_ps(params->sse.max);
  const __m128 vmin = _mm_load_ps(params->sse.min);

  const __m128 vbias = _mm_load1_ps(weights);
  const __m128 vk00 = _mm_load1_ps(weights + 1);
  const __m128 vk01 = _mm_load1_ps(weights + 2);
  const __m128 vk02 = _mm_load1_ps(weights + 3);
  const __m128 vk10 = _mm_load1_ps(weights + 4);
  const __m128 vk11 = _mm_load1_ps(weights + 5);
  const __m128 vk12 = _mm_load1_ps(weights + 6);
  const __m128 vk20 = _mm_load1_ps(weights + 7);
  const __m128 vk21 = _mm_load1_ps(weights + 8);
  const __m128 vk22 = _mm_load1_ps(weights + 9);

  const size_t input_decrement = round_up_po2(input_width, 4 * sizeof(float));

  const float* i0 = zero;
  const float* i1 = input;
  const float* i2 = (const float*) ((uintptr_t) i1 + input_width);
  const float* i3 = (const float*) ((uintptr_t) i2 + input_width);

  float* o0 = output;
  float* o1 = (float*) ((uintptr_t) o0 + input_width);

  size_t output_height = input_height;
  do {
    if XNN_UNPREDICTABLE(output_height < 2) {
      i2 = zero;
      o1 = o0;
    }
    if XNN_UNPREDICTABLE(output_height < 3) {
      i3 = zero;
    }

    __m128 vi0x0123 = _mm_setzero_ps();
    __m128 vi1x0123 = _mm_setzero_ps();
    __m128 vi2x0123 = _mm_setzero_ps();
    __m128 vi3x0123 = _mm_setzero_ps();

    __m128 vi0x4567 = _mm_loadu_ps(i0);
    i0 += 4;
    __m128 vi1x4567 = _mm_loadu_ps(i1);
    i1 += 4;
    __m128 vi2x4567 = _mm_loadu_ps(i2);
    i2 += 4;
    __m128 vi3x4567 = _mm_loadu_ps(i3);
    i3 += 4;

    size_t w = input_width;
    for (; w > 4 * sizeof(float); w -= 4 * sizeof(float)) {
      const __m128 vi0x89AB = _mm_loadu_ps(i0);
      i0 += 4;
      const __m128 vi1x89AB = _mm_loadu_ps(i1);
      i1 += 4;
      const __m128 vi2x89AB = _mm_loadu_ps(i2);
      i2 += 4;
      const __m128 vi3x89AB = _mm_loadu_ps(i3);
      i3 += 4;

      __m128 vo0p0 = _mm_add_ps(vbias, _mm_mul_ps(vi0x4567, vk01));
      __m128 vo1p0 = _mm_add_ps(vbias, _mm_mul_ps(vi1x4567, vk01));
      __m128 vo0p1 = _mm_mul_ps(vi1x4567, vk11);
      __m128 vo1p1 = _mm_mul_ps(vi2x4567, vk11);
      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi2x4567, vk21));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi3x4567, vk21));

      const __m128 vi0x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi0x4567), _mm_castps_si128(vi0x0123), 12));
      const __m128 vi1x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi1x4567), _mm_castps_si128(vi1x0123), 12));
      const __m128 vi2x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi2x4567), _mm_castps_si128(vi2x0123), 12));
      const __m128 vi3x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi3x4567), _mm_castps_si128(vi3x0123), 12));

      vo0p1 = _mm_add_ps(vo0p1, _mm_mul_ps(vi0x3456, vk00));
      vo1p1 = _mm_add_ps(vo1p1, _mm_mul_ps(vi1x3456, vk00));
      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi1x3456, vk10));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi2x3456, vk10));
      vo0p1 = _mm_add_ps(vo0p1, _mm_mul_ps(vi2x3456, vk20));
      vo1p1 = _mm_add_ps(vo1p1, _mm_mul_ps(vi3x3456, vk20));

      vi0x0123 = vi0x4567;
      vi1x0123 = vi1x4567;
      vi2x0123 = vi2x4567;
      vi3x0123 = vi3x4567;

      const __m128 vi0x5678 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi0x89AB), _mm_castps_si128(vi0x4567), 4));
      const __m128 vi1x5678 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi1x89AB), _mm_castps_si128(vi1x4567), 4));
      const __m128 vi2x5678 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi2x89AB), _mm_castps_si128(vi2x4567), 4));
      const __m128 vi3x5678 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi3x89AB), _mm_castps_si128(vi3x4567), 4));

      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi0x5678, vk02));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi1x5678, vk02));
      vo0p1 = _mm_add_ps(vo0p1, _mm_mul_ps(vi1x5678, vk12));
      vo1p1 = _mm_add_ps(vo1p1, _mm_mul_ps(vi2x5678, vk12));
      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi2x5678, vk22));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi3x5678, vk22));

      vi0x4567 = vi0x89AB;
      vi1x4567 = vi1x89AB;
      vi2x4567 = vi2x89AB;
      vi3x4567 = vi3x89AB;

      vo0p0 = _mm_add_ps(vo0p0, vo0p1);
      vo1p0 = _mm_add_ps(vo1p0, vo1p1);

      __m128 vo0 = _mm_max_ps(vo0p0, vmin);
      __m128 vo1 = _mm_max_ps(vo1p0, vmin);

      vo0 = _mm_min_ps(vo0, vmax);
      vo1 = _mm_min_ps(vo1, vmax);

      _mm_storeu_ps(o1, vo1);
      o1 += 4;
      _mm_storeu_ps(o0, vo0);
      o0 += 4;
    }
    // Always process the last block of 1..4 pixels.
    assert(w >= 1 * sizeof(float));
    assert(w <= 4 * sizeof(float));
    {
      vi0x4567 = _mm_and_ps(vmask, vi0x4567);
      vi1x4567 = _mm_and_ps(vmask, vi1x4567);
      vi2x4567 = _mm_and_ps(vmask, vi2x4567);
      vi3x4567 = _mm_and_ps(vmask, vi3x4567);

      __m128 vo0p0 = _mm_add_ps(vbias, _mm_mul_ps(vi0x4567, vk01));
      __m128 vo1p0 = _mm_add_ps(vbias, _mm_mul_ps(vi1x4567, vk01));
      __m128 vo0p1 = _mm_mul_ps(vi1x4567, vk11);
      __m128 vo1p1 = _mm_mul_ps(vi2x4567, vk11);
      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi2x4567, vk21));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi3x4567, vk21));

      const __m128 vi0x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi0x4567), _mm_castps_si128(vi0x0123), 12));
      const __m128 vi1x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi1x4567), _mm_castps_si128(vi1x0123), 12));
      const __m128 vi2x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi2x4567), _mm_castps_si128(vi2x0123), 12));
      const __m128 vi3x3456 = _mm_castsi128_ps(_mm_alignr_epi8(_mm_castps_si128(vi3x4567), _mm_castps_si128(vi3x0123), 12));

      vo0p1 = _mm_add_ps(vo0p1, _mm_mul_ps(vi0x3456, vk00));
      vo1p1 = _mm_add_ps(vo1p1, _mm_mul_ps(vi1x3456, vk00));
      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi1x3456, vk10));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi2x3456, vk10));
      vo0p1 = _mm_add_ps(vo0p1, _mm_mul_ps(vi2x3456, vk20));
      vo1p1 = _mm_add_ps(vo1p1, _mm_mul_ps(vi3x3456, vk20));

      const __m128i vzero = _mm_setzero_si128();
      const __m128 vi0x5678 = _mm_castsi128_ps(_mm_alignr_epi8(vzero, _mm_castps_si128(vi0x4567), 4));
      const __m128 vi1x5678 = _mm_castsi128_ps(_mm_alignr_epi8(vzero, _mm_castps_si128(vi1x4567), 4));
      const __m128 vi2x5678 = _mm_castsi128_ps(_mm_alignr_epi8(vzero, _mm_castps_si128(vi2x4567), 4));
      const __m128 vi3x5678 = _mm_castsi128_ps(_mm_alignr_epi8(vzero, _mm_castps_si128(vi3x4567), 4));

      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi0x5678, vk02));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi1x5678, vk02));
      vo0p1 = _mm_add_ps(vo0p1, _mm_mul_ps(vi1x5678, vk12));
      vo1p1 = _mm_add_ps(vo1p1, _mm_mul_ps(vi2x5678, vk12));
      vo0p0 = _mm_add_ps(vo0p0, _mm_mul_ps(vi2x5678, vk22));
      vo1p0 = _mm_add_ps(vo1p0, _mm_mul_ps(vi3x5678, vk22));

      vo0p0 = _mm_add_ps(vo0p0, vo0p1);
      vo1p0 = _mm_add_ps(vo1p0, vo1p1);

      __m128 vo0 = _mm_max_ps(vo0p0, vmin);
      __m128 vo1 = _mm_max_ps(vo1p0, vmin);

      vo0 = _mm_min_ps(vo0, vmax);
      vo1 = _mm_min_ps(vo1, vmax);

      if XNN_LIKELY(w == 4 * sizeof(float)) {
        _mm_storeu_ps(o1, vo1);
        o1 += 4;
        _mm_storeu_ps(o0, vo0);
        o0 += 4;
      } else {
        if (w & (2 * sizeof(float))) {
          _mm_storel_pi((__m64*) o1, vo1);
          o1 += 2;
          _mm_storel_pi((__m64*) o0, vo0);
          o0 += 2;

          vo0 = _mm_movehl_ps(vo0, vo0);
          vo1 = _mm_movehl_ps(vo1, vo1);
        }
        if (w & (1 * sizeof(float))) {
          _mm_store_ss(o1, vo1);
          o1 += 1;
          _mm_store_ss(o0, vo0);
          o0 += 1;
        }
      }
    }

    i0 = (const float*) ((uintptr_t) i2 - input_decrement);
    i1 = (const float*) ((uintptr_t) i3 - input_decrement);
    i2 = (const float*) ((uintptr_t) i1 + input_width);
    i3 = (const float*) ((uintptr_t) i2 + input_width);

    o0 = o1;
    o1 = (float*) ((uintptr_t) o0 + input_width);

    output_height = doz(output_height, 2);
  } while (output_height != 0);
}

void xnn_qs8_vcvt_ukernel__ssse3_x32(
    size_t n,
    const int8_t* x,
    int8_t* y,
    const union xnn_qs8_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(n != 0);
  assert(n % sizeof(int8_t) == 0);
  assert(x != NULL);
  assert(y != NULL);

  const __m128i vinput_zero_point = _mm_load_si128((const __m128i*) params->ssse3.input_zero_point);
  const __m128i vmultiplier = _mm_load_si128((const __m128i*) params->ssse3.multiplier);
  const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->ssse3.output_zero_point);
  for (; n >= 32 * sizeof(int8_t); n -= 32 * sizeof(int8_t)) {
    const __m128i vx0 = _mm_loadu_si128((const __m128i*) x);
    const __m128i vx1 = _mm_loadu_si128((const __m128i*) (x + 16));
    x += 32;

    const __m128i vm0 = _mm_cmpgt_epi8(_mm_setzero_si128(), vx0);
    __m128i vacc0 = _mm_unpacklo_epi8(vx0, vm0);
    __m128i vacc1 = _mm_unpackhi_epi8(vx0, vm0);
    const __m128i vm1 = _mm_cmpgt_epi8(_mm_setzero_si128(), vx1);
    __m128i vacc2 = _mm_unpacklo_epi8(vx1, vm1);
    __m128i vacc3 = _mm_unpackhi_epi8(vx1, vm1);

    vacc0 = _mm_sub_epi16(vinput_zero_point, vacc0);
    vacc1 = _mm_sub_epi16(vinput_zero_point, vacc1);
    vacc2 = _mm_sub_epi16(vinput_zero_point, vacc2);
    vacc3 = _mm_sub_epi16(vinput_zero_point, vacc3);

    vacc0 = _mm_slli_epi16(vacc0, 7);
    vacc1 = _mm_slli_epi16(vacc1, 7);
    vacc2 = _mm_slli_epi16(vacc2, 7);
    vacc3 = _mm_slli_epi16(vacc3, 7);

    vacc0 = _mm_mulhrs_epi16(vacc0, vmultiplier);
    vacc1 = _mm_mulhrs_epi16(vacc1, vmultiplier);
    vacc2 = _mm_mulhrs_epi16(vacc2, vmultiplier);
    vacc3 = _mm_mulhrs_epi16(vacc3, vmultiplier);

    vacc0 = _mm_adds_epi16(vacc0, voutput_zero_point);
    vacc1 = _mm_adds_epi16(vacc1, voutput_zero_point);
    vacc2 = _mm_adds_epi16(vacc2, voutput_zero_point);
    vacc3 = _mm_adds_epi16(vacc3, voutput_zero_point);

    const __m128i vy0 = _mm_packs_epi16(vacc0, vacc1);
    const __m128i vy1 = _mm_packs_epi16(vacc2, vacc3);

    _mm_storeu_si128((__m128i*) y, vy0);
    _mm_storeu_si128((__m128i*) (y + 16), vy1);
    y += 32;
  }
  for (; n >= 16 * sizeof(int8_t); n -= 16 * sizeof(int8_t)) {
    const __m128i vx = _mm_loadu_si128((const __m128i*) x);
    x += 16;

    const __m128i vm = _mm_cmpgt_epi8(_mm_setzero_si128(), vx);
    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vm);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vm);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    const __m128i vy = _mm_packs_epi16(vacc_lo, vacc_hi);
    _mm_storeu_si128((__m128i*) y, vy);
    y += 16;
  }
  if XNN_UNLIKELY(n != 0) {
    assert(n >= 1 * sizeof(int8_t));
    assert(n <= 15 * sizeof(int8_t));

    const __m128i vx = _mm_loadu_si128((const __m128i*) x);

    const __m128i vm = _mm_cmpgt_epi8(_mm_setzero_si128(), vx);
    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vm);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vm);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    __m128i vy = _mm_packs_epi16(vacc_lo, vacc_hi);
    if (n & (8 * sizeof(int8_t))) {
      _mm_storel_epi64((__m128i*) y, vy);
      vy = _mm_unpackhi_epi64(vy, vy);
      y += 8;
    }
    if (n & (4 * sizeof(int8_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(int8_t))) {
      unaligned_store_u16(y, (uint16_t) vy_lo);
      vy_lo >>= 16;
      y += 2;
    }
    if (n & (1 * sizeof(int8_t))) {
      *y = (int8_t) vy_lo;
    }
  }
}

void xnn_qs8_vlrelu_ukernel__ssse3_x32(
    size_t n,
    const int8_t* x,
    int8_t* y,
    const union xnn_qs8_lrelu_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(n != 0);
  assert(n % sizeof(int8_t) == 0);
  assert(x != NULL);
  assert(y != NULL);

  const __m128i vinput_zero_point = _mm_load_si128((const __m128i*) params->sse2.input_zero_point);
  const __m128i vmultiplier_diff = _mm_load_si128((const __m128i*) params->sse2.multiplier_diff);
  const __m128i vmultiplier_base = _mm_load_si128((const __m128i*) params->sse2.multiplier_base);
  const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->sse2.output_zero_point);
  for (; n >= 32 * sizeof(int8_t); n -= 32 * sizeof(int8_t)) {
    const __m128i vx0 = _mm_loadu_si128((const __m128i*) x);
    const __m128i vx1 = _mm_loadu_si128((const __m128i*) (x + 16));
    x += 32;

    const __m128i vm0 = _mm_cmpgt_epi8(_mm_setzero_si128(), vx0);
    __m128i vacc0 = _mm_unpacklo_epi8(vx0, vm0);
    __m128i vacc1 = _mm_unpackhi_epi8(vx0, vm0);
    const __m128i vm1 = _mm_cmpgt_epi8(_mm_setzero_si128(), vx1);
    __m128i vacc2 = _mm_unpacklo_epi8(vx1, vm1);
    __m128i vacc3 = _mm_unpackhi_epi8(vx1, vm1);

    __m128i vmultiplier0 = _mm_cmpgt_epi16(vacc0, vinput_zero_point);
    vacc0 = _mm_sub_epi16(vinput_zero_point, vacc0);
    __m128i vmultiplier1 = _mm_cmpgt_epi16(vacc1, vinput_zero_point);
    vacc1 = _mm_sub_epi16(vinput_zero_point, vacc1);
    __m128i vmultiplier2 = _mm_cmpgt_epi16(vacc2, vinput_zero_point);
    vacc2 = _mm_sub_epi16(vinput_zero_point, vacc2);
    __m128i vmultiplier3 = _mm_cmpgt_epi16(vacc3, vinput_zero_point);
    vacc3 = _mm_sub_epi16(vinput_zero_point, vacc3);

    vmultiplier0 = _mm_and_si128(vmultiplier0, vmultiplier_diff);
    vacc0 = _mm_slli_epi16(vacc0, 7);
    vmultiplier0 = _mm_xor_si128(vmultiplier0, vmultiplier_base);
    vmultiplier1 = _mm_and_si128(vmultiplier1, vmultiplier_diff);
    vacc1 = _mm_slli_epi16(vacc1, 7);
    vmultiplier1 = _mm_xor_si128(vmultiplier1, vmultiplier_base);
    vmultiplier2 = _mm_and_si128(vmultiplier2, vmultiplier_diff);
    vacc2 = _mm_slli_epi16(vacc2, 7);
    vmultiplier2 = _mm_xor_si128(vmultiplier2, vmultiplier_base);
    vmultiplier3 = _mm_and_si128(vmultiplier3, vmultiplier_diff);
    vacc3 = _mm_slli_epi16(vacc3, 7);
    vmultiplier3 = _mm_xor_si128(vmultiplier3, vmultiplier_base);

    vacc0 = _mm_mulhrs_epi16(vacc0, vmultiplier0);
    vacc1 = _mm_mulhrs_epi16(vacc1, vmultiplier1);
    vacc2 = _mm_mulhrs_epi16(vacc2, vmultiplier2);
    vacc3 = _mm_mulhrs_epi16(vacc3, vmultiplier3);

    vacc0 = _mm_adds_epi16(vacc0, voutput_zero_point);
    vacc1 = _mm_adds_epi16(vacc1, voutput_zero_point);
    vacc2 = _mm_adds_epi16(vacc2, voutput_zero_point);
    vacc3 = _mm_adds_epi16(vacc3, voutput_zero_point);

    const __m128i vy0 = _mm_packs_epi16(vacc0, vacc1);
    const __m128i vy1 = _mm_packs_epi16(vacc2, vacc3);

    _mm_storeu_si128((__m128i*) y, vy0);
    _mm_storeu_si128((__m128i*) (y + 16), vy1);
    y += 32;
  }
  for (; n >= 16 * sizeof(int8_t); n -= 16 * sizeof(int8_t)) {
    const __m128i vx = _mm_loadu_si128((const __m128i*) x);
    x += 16;

    const __m128i vm = _mm_cmpgt_epi8(_mm_setzero_si128(), vx);
    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vm);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vm);
    __m128i vmultiplier_lo = _mm_cmpgt_epi16(vacc_lo, vinput_zero_point);
    __m128i vmultiplier_hi = _mm_cmpgt_epi16(vacc_hi, vinput_zero_point);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vmultiplier_lo = _mm_and_si128(vmultiplier_lo, vmultiplier_diff);
    vmultiplier_hi = _mm_and_si128(vmultiplier_hi, vmultiplier_diff);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vmultiplier_lo = _mm_xor_si128(vmultiplier_lo, vmultiplier_base);
    vmultiplier_hi = _mm_xor_si128(vmultiplier_hi, vmultiplier_base);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier_lo);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier_hi);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    const __m128i vy = _mm_packs_epi16(vacc_lo, vacc_hi);
    _mm_storeu_si128((__m128i*) y, vy);
    y += 16;
  }
  if XNN_UNLIKELY(n != 0) {
    assert(n >= 1 * sizeof(int8_t));
    assert(n <= 15 * sizeof(int8_t));

    const __m128i vx = _mm_loadu_si128((const __m128i*) x);

    const __m128i vm = _mm_cmpgt_epi8(_mm_setzero_si128(), vx);
    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vm);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vm);
    __m128i vmultiplier_lo = _mm_cmpgt_epi16(vacc_lo, vinput_zero_point);
    __m128i vmultiplier_hi = _mm_cmpgt_epi16(vacc_hi, vinput_zero_point);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vmultiplier_lo = _mm_and_si128(vmultiplier_lo, vmultiplier_diff);
    vmultiplier_hi = _mm_and_si128(vmultiplier_hi, vmultiplier_diff);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vmultiplier_lo = _mm_xor_si128(vmultiplier_lo, vmultiplier_base);
    vmultiplier_hi = _mm_xor_si128(vmultiplier_hi, vmultiplier_base);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier_lo);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier_hi);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    __m128i vy = _mm_packs_epi16(vacc_lo, vacc_hi);
    if (n & (8 * sizeof(int8_t))) {
      _mm_storel_epi64((__m128i*) y, vy);
      vy = _mm_unpackhi_epi64(vy, vy);
      y += 8;
    }
    if (n & (4 * sizeof(int8_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(int8_t))) {
      unaligned_store_u16(y, (uint16_t) vy_lo);
      vy_lo >>= 16;
      y += 2;
    }
    if (n & (1 * sizeof(int8_t))) {
      *y = (int8_t) vy_lo;
    }
  }
}

void xnn_qu8_vcvt_ukernel__ssse3_x32(
    size_t n,
    const uint8_t* x,
    uint8_t* y,
    const union xnn_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(n != 0);
  assert(n % sizeof(uint8_t) == 0);
  assert(x != NULL);
  assert(y != NULL);

  const __m128i vinput_zero_point = _mm_load_si128((const __m128i*) params->ssse3.input_zero_point);
  const __m128i vmultiplier = _mm_load_si128((const __m128i*) params->ssse3.multiplier);
  const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->ssse3.output_zero_point);
  const __m128i vzero = _mm_setzero_si128();
  for (; n >= 32 * sizeof(uint8_t); n -= 32 * sizeof(uint8_t)) {
    const __m128i vx0 = _mm_loadu_si128((const __m128i*) x);
    const __m128i vx1 = _mm_loadu_si128((const __m128i*) (x + 16));
    x += 32;

    __m128i vacc0 = _mm_unpacklo_epi8(vx0, vzero);
    __m128i vacc1 = _mm_unpackhi_epi8(vx0, vzero);
    __m128i vacc2 = _mm_unpacklo_epi8(vx1, vzero);
    __m128i vacc3 = _mm_unpackhi_epi8(vx1, vzero);

    vacc0 = _mm_sub_epi16(vinput_zero_point, vacc0);
    vacc1 = _mm_sub_epi16(vinput_zero_point, vacc1);
    vacc2 = _mm_sub_epi16(vinput_zero_point, vacc2);
    vacc3 = _mm_sub_epi16(vinput_zero_point, vacc3);

    vacc0 = _mm_slli_epi16(vacc0, 7);
    vacc1 = _mm_slli_epi16(vacc1, 7);
    vacc2 = _mm_slli_epi16(vacc2, 7);
    vacc3 = _mm_slli_epi16(vacc3, 7);

    vacc0 = _mm_mulhrs_epi16(vacc0, vmultiplier);
    vacc1 = _mm_mulhrs_epi16(vacc1, vmultiplier);
    vacc2 = _mm_mulhrs_epi16(vacc2, vmultiplier);
    vacc3 = _mm_mulhrs_epi16(vacc3, vmultiplier);

    vacc0 = _mm_adds_epi16(vacc0, voutput_zero_point);
    vacc1 = _mm_adds_epi16(vacc1, voutput_zero_point);
    vacc2 = _mm_adds_epi16(vacc2, voutput_zero_point);
    vacc3 = _mm_adds_epi16(vacc3, voutput_zero_point);

    const __m128i vy0 = _mm_packus_epi16(vacc0, vacc1);
    const __m128i vy1 = _mm_packus_epi16(vacc2, vacc3);

    _mm_storeu_si128((__m128i*) y, vy0);
    _mm_storeu_si128((__m128i*) (y + 16), vy1);
    y += 32;
  }
  for (; n >= 16 * sizeof(uint8_t); n -= 16 * sizeof(uint8_t)) {
    const __m128i vx = _mm_loadu_si128((const __m128i*) x);
    x += 16;

    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vzero);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vzero);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    const __m128i vy = _mm_packus_epi16(vacc_lo, vacc_hi);
    _mm_storeu_si128((__m128i*) y, vy);
    y += 16;
  }
  if XNN_UNLIKELY(n != 0) {
    assert(n >= 1 * sizeof(uint8_t));
    assert(n <= 15 * sizeof(uint8_t));

    const __m128i vx = _mm_loadu_si128((const __m128i*) x);

    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vzero);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vzero);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    __m128i vy = _mm_packus_epi16(vacc_lo, vacc_hi);
    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;
    }
  }
}

void xnn_qu8_vlrelu_ukernel__ssse3_x32(
    size_t n,
    const uint8_t* x,
    uint8_t* y,
    const union xnn_qu8_lrelu_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(n != 0);
  assert(n % sizeof(uint8_t) == 0);
  assert(x != NULL);
  assert(y != NULL);

  const __m128i vinput_zero_point = _mm_load_si128((const __m128i*) params->sse2.input_zero_point);
  const __m128i vmultiplier_diff = _mm_load_si128((const __m128i*) params->sse2.multiplier_diff);
  const __m128i vmultiplier_base = _mm_load_si128((const __m128i*) params->sse2.multiplier_base);
  const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->sse2.output_zero_point);
  const __m128i vzero = _mm_setzero_si128();
  for (; n >= 32 * sizeof(uint8_t); n -= 32 * sizeof(uint8_t)) {
    const __m128i vx0 = _mm_loadu_si128((const __m128i*) x);
    const __m128i vx1 = _mm_loadu_si128((const __m128i*) (x + 16));
    x += 32;

    __m128i vacc0 = _mm_unpacklo_epi8(vx0, vzero);
    __m128i vacc1 = _mm_unpackhi_epi8(vx0, vzero);
    __m128i vacc2 = _mm_unpacklo_epi8(vx1, vzero);
    __m128i vacc3 = _mm_unpackhi_epi8(vx1, vzero);

    __m128i vmultiplier0 = _mm_cmpgt_epi16(vacc0, vinput_zero_point);
    vacc0 = _mm_sub_epi16(vinput_zero_point, vacc0);
    __m128i vmultiplier1 = _mm_cmpgt_epi16(vacc1, vinput_zero_point);
    vacc1 = _mm_sub_epi16(vinput_zero_point, vacc1);
    __m128i vmultiplier2 = _mm_cmpgt_epi16(vacc2, vinput_zero_point);
    vacc2 = _mm_sub_epi16(vinput_zero_point, vacc2);
    __m128i vmultiplier3 = _mm_cmpgt_epi16(vacc3, vinput_zero_point);
    vacc3 = _mm_sub_epi16(vinput_zero_point, vacc3);

    vmultiplier0 = _mm_and_si128(vmultiplier0, vmultiplier_diff);
    vacc0 = _mm_slli_epi16(vacc0, 7);
    vmultiplier0 = _mm_xor_si128(vmultiplier0, vmultiplier_base);
    vmultiplier1 = _mm_and_si128(vmultiplier1, vmultiplier_diff);
    vacc1 = _mm_slli_epi16(vacc1, 7);
    vmultiplier1 = _mm_xor_si128(vmultiplier1, vmultiplier_base);
    vmultiplier2 = _mm_and_si128(vmultiplier2, vmultiplier_diff);
    vacc2 = _mm_slli_epi16(vacc2, 7);
    vmultiplier2 = _mm_xor_si128(vmultiplier2, vmultiplier_base);
    vmultiplier3 = _mm_and_si128(vmultiplier3, vmultiplier_diff);
    vacc3 = _mm_slli_epi16(vacc3, 7);
    vmultiplier3 = _mm_xor_si128(vmultiplier3, vmultiplier_base);

    vacc0 = _mm_mulhrs_epi16(vacc0, vmultiplier0);
    vacc1 = _mm_mulhrs_epi16(vacc1, vmultiplier1);
    vacc2 = _mm_mulhrs_epi16(vacc2, vmultiplier2);
    vacc3 = _mm_mulhrs_epi16(vacc3, vmultiplier3);

    vacc0 = _mm_adds_epi16(vacc0, voutput_zero_point);
    vacc1 = _mm_adds_epi16(vacc1, voutput_zero_point);
    vacc2 = _mm_adds_epi16(vacc2, voutput_zero_point);
    vacc3 = _mm_adds_epi16(vacc3, voutput_zero_point);

    const __m128i vy0 = _mm_packus_epi16(vacc0, vacc1);
    const __m128i vy1 = _mm_packus_epi16(vacc2, vacc3);

    _mm_storeu_si128((__m128i*) y, vy0);
    _mm_storeu_si128((__m128i*) (y + 16), vy1);
    y += 32;
  }
  for (; n >= 16 * sizeof(uint8_t); n -= 16 * sizeof(uint8_t)) {
    const __m128i vx = _mm_loadu_si128((const __m128i*) x);
    x += 16;

    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vzero);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vzero);
    __m128i vmultiplier_lo = _mm_cmpgt_epi16(vacc_lo, vinput_zero_point);
    __m128i vmultiplier_hi = _mm_cmpgt_epi16(vacc_hi, vinput_zero_point);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vmultiplier_lo = _mm_and_si128(vmultiplier_lo, vmultiplier_diff);
    vmultiplier_hi = _mm_and_si128(vmultiplier_hi, vmultiplier_diff);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vmultiplier_lo = _mm_xor_si128(vmultiplier_lo, vmultiplier_base);
    vmultiplier_hi = _mm_xor_si128(vmultiplier_hi, vmultiplier_base);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier_lo);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier_hi);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    const __m128i vy = _mm_packus_epi16(vacc_lo, vacc_hi);
    _mm_storeu_si128((__m128i*) y, vy);
    y += 16;
  }
  if XNN_UNLIKELY(n != 0) {
    assert(n >= 1 * sizeof(uint8_t));
    assert(n <= 15 * sizeof(uint8_t));

    const __m128i vx = _mm_loadu_si128((const __m128i*) x);

    __m128i vacc_lo = _mm_unpacklo_epi8(vx, vzero);
    __m128i vacc_hi = _mm_unpackhi_epi8(vx, vzero);
    __m128i vmultiplier_lo = _mm_cmpgt_epi16(vacc_lo, vinput_zero_point);
    __m128i vmultiplier_hi = _mm_cmpgt_epi16(vacc_hi, vinput_zero_point);
    vacc_lo = _mm_sub_epi16(vinput_zero_point, vacc_lo);
    vacc_hi = _mm_sub_epi16(vinput_zero_point, vacc_hi);
    vmultiplier_lo = _mm_and_si128(vmultiplier_lo, vmultiplier_diff);
    vmultiplier_hi = _mm_and_si128(vmultiplier_hi, vmultiplier_diff);
    vacc_lo = _mm_slli_epi16(vacc_lo, 7);
    vacc_hi = _mm_slli_epi16(vacc_hi, 7);
    vmultiplier_lo = _mm_xor_si128(vmultiplier_lo, vmultiplier_base);
    vmultiplier_hi = _mm_xor_si128(vmultiplier_hi, vmultiplier_base);
    vacc_lo = _mm_mulhrs_epi16(vacc_lo, vmultiplier_lo);
    vacc_hi = _mm_mulhrs_epi16(vacc_hi, vmultiplier_hi);
    vacc_lo = _mm_adds_epi16(vacc_lo, voutput_zero_point);
    vacc_hi = _mm_adds_epi16(vacc_hi, voutput_zero_point);

    __m128i vy = _mm_packus_epi16(vacc_lo, vacc_hi);
    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;
    }
  }
}