/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#include <emmintrin.h>  // SSE2

#include "./aom_dsp_rtcd.h"
#include "aom_dsp/x86/synonyms.h"
#include "aom_ports/mem.h"
#include "aom_ports/emmintrin_compat.h"

static INLINE __m128i abs_diff(__m128i a, __m128i b) {
  return _mm_or_si128(_mm_subs_epu8(a, b), _mm_subs_epu8(b, a));
}

// filter_mask and hev_mask
#define FILTER_HEV_MASK4                                                      \
  do {                                                                        \
    /* (abs(q1 - q0), abs(p1 - p0) */                                         \
    __m128i flat = abs_diff(q1p1, q0p0);                                      \
    /* abs(p1 - q1), abs(p0 - q0) */                                          \
    const __m128i abs_p1q1p0q0 = abs_diff(p1p0, q1q0);                        \
    __m128i abs_p0q0, abs_p1q1;                                               \
                                                                              \
    /* const uint8_t hev = hev_mask(thresh, *op1, *op0, *oq0, *oq1); */       \
    hev =                                                                     \
        _mm_unpacklo_epi8(_mm_max_epu8(flat, _mm_srli_si128(flat, 8)), zero); \
    hev = _mm_cmpgt_epi16(hev, thresh);                                       \
    hev = _mm_packs_epi16(hev, hev);                                          \
                                                                              \
    /* const int8_t mask = filter_mask2(*limit, *blimit, */                   \
    /*                                  p1, p0, q0, q1); */                   \
    abs_p0q0 =                                                                \
        _mm_adds_epu8(abs_p1q1p0q0, abs_p1q1p0q0); /* abs(p0 - q0) * 2 */     \
    abs_p1q1 =                                                                \
        _mm_unpackhi_epi8(abs_p1q1p0q0, abs_p1q1p0q0); /* abs(p1 - q1) */     \
    abs_p1q1 = _mm_srli_epi16(abs_p1q1, 9);                                   \
    abs_p1q1 = _mm_packs_epi16(abs_p1q1, abs_p1q1); /* abs(p1 - q1) / 2 */    \
    /* abs(p0 - q0) * 2 + abs(p1 - q1) / 2 */                                 \
    mask = _mm_adds_epu8(abs_p0q0, abs_p1q1);                                 \
    flat = _mm_max_epu8(flat, _mm_srli_si128(flat, 8));                       \
    mask = _mm_unpacklo_epi64(mask, flat);                                    \
    mask = _mm_subs_epu8(mask, limit);                                        \
    mask = _mm_cmpeq_epi8(mask, zero);                                        \
    mask = _mm_and_si128(mask, _mm_srli_si128(mask, 8));                      \
  } while (0)

// filter_mask and hev_mask
#define FILTER_HEV_MASK                                                       \
  do {                                                                        \
    /* (abs(q1 - q0), abs(p1 - p0) */                                         \
    __m128i flat = abs_diff(q1p1, q0p0);                                      \
    /* abs(p1 - q1), abs(p0 - q0) */                                          \
    const __m128i abs_p1q1p0q0 = abs_diff(p1p0, q1q0);                        \
    __m128i abs_p0q0, abs_p1q1, work;                                         \
                                                                              \
    /* const uint8_t hev = hev_mask(thresh, *op1, *op0, *oq0, *oq1); */       \
    hev =                                                                     \
        _mm_unpacklo_epi8(_mm_max_epu8(flat, _mm_srli_si128(flat, 8)), zero); \
    hev = _mm_cmpgt_epi16(hev, thresh);                                       \
    hev = _mm_packs_epi16(hev, hev);                                          \
                                                                              \
    /* const int8_t mask = filter_mask(*limit, *blimit, */                    \
    /*                                 p3, p2, p1, p0, q0, q1, q2, q3); */    \
    abs_p0q0 =                                                                \
        _mm_adds_epu8(abs_p1q1p0q0, abs_p1q1p0q0); /* abs(p0 - q0) * 2 */     \
    abs_p1q1 =                                                                \
        _mm_unpackhi_epi8(abs_p1q1p0q0, abs_p1q1p0q0); /* abs(p1 - q1) */     \
    abs_p1q1 = _mm_srli_epi16(abs_p1q1, 9);                                   \
    abs_p1q1 = _mm_packs_epi16(abs_p1q1, abs_p1q1); /* abs(p1 - q1) / 2 */    \
    /* abs(p0 - q0) * 2 + abs(p1 - q1) / 2 */                                 \
    mask = _mm_adds_epu8(abs_p0q0, abs_p1q1);                                 \
    /* abs(p3 - p2), abs(p2 - p1) */                                          \
    work = abs_diff(p3p2, p2p1);                                              \
    flat = _mm_max_epu8(work, flat);                                          \
    /* abs(q3 - q2), abs(q2 - q1) */                                          \
    work = abs_diff(q3q2, q2q1);                                              \
    flat = _mm_max_epu8(work, flat);                                          \
    flat = _mm_max_epu8(flat, _mm_srli_si128(flat, 8));                       \
    mask = _mm_unpacklo_epi64(mask, flat);                                    \
    mask = _mm_subs_epu8(mask, limit);                                        \
    mask = _mm_cmpeq_epi8(mask, zero);                                        \
    mask = _mm_and_si128(mask, _mm_srli_si128(mask, 8));                      \
  } while (0)

AOM_FORCE_INLINE void filter4_sse2(__m128i *p1p0, __m128i *q1q0, __m128i *hev,
                                   __m128i *mask, __m128i *qs1qs0,
                                   __m128i *ps1ps0) {
  const __m128i t3t4 =
      _mm_set_epi8(3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4);
  const __m128i t80 = _mm_set1_epi8(0x80);
  __m128i filter, filter2filter1, work;
  __m128i ps1ps0_work, qs1qs0_work;
  const __m128i ff = _mm_cmpeq_epi8(t80, t80);

  ps1ps0_work = _mm_xor_si128(*p1p0, t80); /* ^ 0x80 */
  qs1qs0_work = _mm_xor_si128(*q1q0, t80);

  /* int8_t filter = signed_char_clamp(ps1 - qs1) & hev; */
  work = _mm_subs_epi8(ps1ps0_work, qs1qs0_work);
  filter = _mm_and_si128(_mm_srli_si128(work, 8), *hev);
  /* filter = signed_char_clamp(filter + 3 * (qs0 - ps0)) & mask; */
  filter = _mm_subs_epi8(filter, work);
  filter = _mm_subs_epi8(filter, work);
  filter = _mm_subs_epi8(filter, work);  /* + 3 * (qs0 - ps0) */
  filter = _mm_and_si128(filter, *mask); /* & mask */
  filter = _mm_unpacklo_epi64(filter, filter);

  /* filter1 = signed_char_clamp(filter + 4) >> 3; */
  /* filter2 = signed_char_clamp(filter + 3) >> 3; */
  filter2filter1 = _mm_adds_epi8(filter, t3t4); /* signed_char_clamp */
  filter = _mm_unpackhi_epi8(filter2filter1, filter2filter1);
  filter2filter1 = _mm_unpacklo_epi8(filter2filter1, filter2filter1);
  filter2filter1 = _mm_srai_epi16(filter2filter1, 11); /* >> 3 */
  filter = _mm_srai_epi16(filter, 11);                 /* >> 3 */
  filter2filter1 = _mm_packs_epi16(filter2filter1, filter);

  /* filter = ROUND_POWER_OF_TWO(filter1, 1) & ~hev; */
  filter = _mm_subs_epi8(filter2filter1, ff); /* + 1 */
  filter = _mm_unpacklo_epi8(filter, filter);
  filter = _mm_srai_epi16(filter, 9); /* round */
  filter = _mm_packs_epi16(filter, filter);
  filter = _mm_andnot_si128(*hev, filter);

  *hev = _mm_unpackhi_epi64(filter2filter1, filter);
  filter2filter1 = _mm_unpacklo_epi64(filter2filter1, filter);

  /* signed_char_clamp(qs1 - filter), signed_char_clamp(qs0 - filter1) */
  qs1qs0_work = _mm_subs_epi8(qs1qs0_work, filter2filter1);
  /* signed_char_clamp(ps1 + filter), signed_char_clamp(ps0 + filter2) */
  ps1ps0_work = _mm_adds_epi8(ps1ps0_work, *hev);
  *qs1qs0 = _mm_xor_si128(qs1qs0_work, t80); /* ^ 0x80 */
  *ps1ps0 = _mm_xor_si128(ps1ps0_work, t80); /* ^ 0x80 */
}

void aom_lpf_horizontal_4_sse2(uint8_t *s, int p /* pitch */,
                               const uint8_t *_blimit, const uint8_t *_limit,
                               const uint8_t *_thresh) {
  const __m128i zero = _mm_setzero_si128();
  const __m128i limit =
      _mm_unpacklo_epi64(_mm_loadl_epi64((const __m128i *)_blimit),
                         _mm_loadl_epi64((const __m128i *)_limit));
  const __m128i thresh =
      _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)_thresh), zero);
  __m128i q1p1, q0p0, p1p0, q1q0, ps1ps0, qs1qs0;
  __m128i mask, hev;
  q1p1 = _mm_unpacklo_epi64(_mm_loadl_epi64((__m128i *)(s - 2 * p)),
                            _mm_loadl_epi64((__m128i *)(s + 1 * p)));
  q0p0 = _mm_unpacklo_epi64(_mm_loadl_epi64((__m128i *)(s - 1 * p)),
                            _mm_loadl_epi64((__m128i *)(s + 0 * p)));
  p1p0 = _mm_unpacklo_epi64(q0p0, q1p1);
  q1q0 = _mm_unpackhi_epi64(q0p0, q1p1);
  FILTER_HEV_MASK4;
  filter4_sse2(&p1p0, &q1q0, &hev, &mask, &qs1qs0, &ps1ps0);

  xx_storel_32(s - 1 * p, ps1ps0);
  xx_storel_32(s - 2 * p, _mm_srli_si128(ps1ps0, 8));
  xx_storel_32(s + 0 * p, qs1qs0);
  xx_storel_32(s + 1 * p, _mm_srli_si128(qs1qs0, 8));
}

void aom_lpf_vertical_4_sse2(uint8_t *s, int p /* pitch */,
                             const uint8_t *_blimit, const uint8_t *_limit,
                             const uint8_t *_thresh) {
  const __m128i zero = _mm_setzero_si128();
  const __m128i limit =
      _mm_unpacklo_epi64(_mm_loadl_epi64((const __m128i *)_blimit),
                         _mm_loadl_epi64((const __m128i *)_limit));
  const __m128i thresh =
      _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)_thresh), zero);

  __m128i x0, x1, x2, x3;
  __m128i q1p1, q0p0, p1p0, q1q0, ps1ps0, qs1qs0;
  __m128i mask, hev;

  // 00 10 01 11 02 12 03 13 04 14 05 15 06 16 07 17
  q1q0 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(s + 0 * p - 4)),
                           _mm_loadl_epi64((__m128i *)(s + 1 * p - 4)));

  // 20 30 21 31 22 32 23 33 24 34 25 35 26 36 27 37
  x1 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(s + 2 * p - 4)),
                         _mm_loadl_epi64((__m128i *)(s + 3 * p - 4)));

  // 40 50 41 51 42 52 43 53 44 54 45 55 46 56 47 57
  x2 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(s + 4 * p - 4)),
                         _mm_loadl_epi64((__m128i *)(s + 5 * p - 4)));

  // 60 70 61 71 62 72 63 73 64 74 65 75 66 76 67 77
  x3 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(s + 6 * p - 4)),
                         _mm_loadl_epi64((__m128i *)(s + 7 * p - 4)));

  // Transpose 8x8
  // 00 10 20 30 01 11 21 31  02 12 22 32 03 13 23 33
  p1p0 = _mm_unpacklo_epi16(q1q0, x1);
  // 40 50 60 70 41 51 61 71  42 52 62 72 43 53 63 73
  x0 = _mm_unpacklo_epi16(x2, x3);
  // 02 12 22 32 42 52 62 72  03 13 23 33 43 53 63 73
  p1p0 = _mm_unpackhi_epi32(p1p0, x0);
  p1p0 = _mm_unpackhi_epi64(p1p0, _mm_slli_si128(p1p0, 8));  // swap lo and high

  // 04 14 24 34 05 15 25 35  06 16 26 36 07 17 27 37
  q1q0 = _mm_unpackhi_epi16(q1q0, x1);
  // 44 54 64 74 45 55 65 75  46 56 66 76 47 57 67 77
  x2 = _mm_unpackhi_epi16(x2, x3);
  // 04 14 24 34 44 54 64 74  05 15 25 35 45 55 65 75
  q1q0 = _mm_unpacklo_epi32(q1q0, x2);

  q0p0 = _mm_unpacklo_epi64(p1p0, q1q0);
  q1p1 = _mm_unpackhi_epi64(p1p0, q1q0);
  p1p0 = _mm_unpacklo_epi64(q0p0, q1p1);
  FILTER_HEV_MASK4;
  filter4_sse2(&p1p0, &q1q0, &hev, &mask, &qs1qs0, &ps1ps0);

  // Transpose 8x4 to 4x8
  // qs1qs0: 20 21 22 23 24 25 26 27  30 31 32 33 34 34 36 37
  // ps1ps0: 10 11 12 13 14 15 16 17  00 01 02 03 04 05 06 07
  // 00 01 02 03 04 05 06 07  10 11 12 13 14 15 16 17
  ps1ps0 = _mm_unpackhi_epi64(ps1ps0, _mm_slli_si128(ps1ps0, 8));
  // 10 30 11 31 12 32 13 33  14 34 15 35 16 36 17 37
  x0 = _mm_unpackhi_epi8(ps1ps0, qs1qs0);
  // 00 20 01 21 02 22 03 23  04 24 05 25 06 26 07 27
  ps1ps0 = _mm_unpacklo_epi8(ps1ps0, qs1qs0);
  // 00 10 20 30 01 11 21 31  02 12 22 32 03 13 23 33
  ps1ps0 = _mm_unpacklo_epi8(ps1ps0, x0);

  xx_storel_32(s + 0 * p - 2, ps1ps0);
  xx_storel_32(s + 1 * p - 2, _mm_srli_si128(ps1ps0, 4));
  xx_storel_32(s + 2 * p - 2, _mm_srli_si128(ps1ps0, 8));
  xx_storel_32(s + 3 * p - 2, _mm_srli_si128(ps1ps0, 12));
}

static INLINE void store_buffer_horz_8(__m128i x, int p, int num, uint8_t *s) {
  xx_storel_32(s - (num + 1) * p, x);
  xx_storel_32(s + num * p, _mm_srli_si128(x, 8));
}

void aom_lpf_horizontal_14_sse2(unsigned char *s, int p,
                                const unsigned char *_blimit,
                                const unsigned char *_limit,
                                const unsigned char *_thresh) {
  const __m128i zero = _mm_setzero_si128();
  const __m128i one = _mm_set1_epi8(1);
  const __m128i blimit = _mm_load_si128((const __m128i *)_blimit);
  const __m128i limit = _mm_load_si128((const __m128i *)_limit);
  const __m128i thresh = _mm_load_si128((const __m128i *)_thresh);
  __m128i mask, hev, flat, flat2;
  __m128i q6p6, q5p5, q4p4, q3p3, q2p2, q1p1, q0p0, p0q0, p1q1;
  __m128i abs_p1p0;

  q4p4 = _mm_loadl_epi64((__m128i *)(s - 5 * p));
  q4p4 = _mm_castps_si128(
      _mm_loadh_pi(_mm_castsi128_ps(q4p4), (__m64 *)(s + 4 * p)));
  q3p3 = _mm_loadl_epi64((__m128i *)(s - 4 * p));
  q3p3 = _mm_castps_si128(
      _mm_loadh_pi(_mm_castsi128_ps(q3p3), (__m64 *)(s + 3 * p)));
  q2p2 = _mm_loadl_epi64((__m128i *)(s - 3 * p));
  q2p2 = _mm_castps_si128(
      _mm_loadh_pi(_mm_castsi128_ps(q2p2), (__m64 *)(s + 2 * p)));
  q1p1 = _mm_loadl_epi64((__m128i *)(s - 2 * p));
  q1p1 = _mm_castps_si128(
      _mm_loadh_pi(_mm_castsi128_ps(q1p1), (__m64 *)(s + 1 * p)));
  p1q1 = _mm_shuffle_epi32(q1p1, 78);
  q0p0 = _mm_loadl_epi64((__m128i *)(s - 1 * p));
  q0p0 = _mm_castps_si128(
      _mm_loadh_pi(_mm_castsi128_ps(q0p0), (__m64 *)(s - 0 * p)));
  p0q0 = _mm_shuffle_epi32(q0p0, 78);

  {
    __m128i abs_p1q1, abs_p0q0, abs_q1q0, fe, ff, work;
    abs_p1p0 = abs_diff(q1p1, q0p0);
    abs_q1q0 = _mm_srli_si128(abs_p1p0, 8);
    fe = _mm_set1_epi8(0xfe);
    ff = _mm_cmpeq_epi8(abs_p1p0, abs_p1p0);
    abs_p0q0 = abs_diff(q0p0, p0q0);
    abs_p1q1 = abs_diff(q1p1, p1q1);
    flat = _mm_max_epu8(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu8(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi8(hev, zero), ff);

    abs_p0q0 = _mm_adds_epu8(abs_p0q0, abs_p0q0);
    abs_p1q1 = _mm_srli_epi16(_mm_and_si128(abs_p1q1, fe), 1);
    mask = _mm_subs_epu8(_mm_adds_epu8(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi8(mask, zero), ff);
    // mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;
    mask = _mm_max_epu8(abs_p1p0, mask);
    // mask |= (abs(p1 - p0) > limit) * -1;
    // mask |= (abs(q1 - q0) > limit) * -1;

    work = _mm_max_epu8(abs_diff(q2p2, q1p1), abs_diff(q3p3, q2p2));
    mask = _mm_max_epu8(work, mask);
    mask = _mm_max_epu8(mask, _mm_srli_si128(mask, 8));
    mask = _mm_subs_epu8(mask, limit);
    mask = _mm_cmpeq_epi8(mask, zero);
  }

  // lp filter
  {
    const __m128i t4 = _mm_set1_epi8(4);
    const __m128i t3 = _mm_set1_epi8(3);
    const __m128i t80 = _mm_set1_epi8(0x80);
    const __m128i t1 = _mm_set1_epi16(0x1);
    __m128i qs1ps1 = _mm_xor_si128(q1p1, t80);
    __m128i qs0ps0 = _mm_xor_si128(q0p0, t80);
    __m128i qs0 = _mm_xor_si128(p0q0, t80);
    __m128i qs1 = _mm_xor_si128(p1q1, t80);
    __m128i filt;
    __m128i work_a;
    __m128i filter1, filter2;
    __m128i flat2_q5p5, flat2_q4p4, flat2_q3p3, flat2_q2p2;
    __m128i flat2_q1p1, flat2_q0p0, flat_q2p2, flat_q1p1, flat_q0p0;

    filt = _mm_and_si128(_mm_subs_epi8(qs1ps1, qs1), hev);
    work_a = _mm_subs_epi8(qs0, qs0ps0);
    filt = _mm_adds_epi8(filt, work_a);
    filt = _mm_adds_epi8(filt, work_a);
    filt = _mm_adds_epi8(filt, work_a);
    // (aom_filter + 3 * (qs0 - ps0)) & mask
    filt = _mm_and_si128(filt, mask);

    filter1 = _mm_adds_epi8(filt, t4);
    filter2 = _mm_adds_epi8(filt, t3);

    filter1 = _mm_unpacklo_epi8(zero, filter1);
    filter1 = _mm_srai_epi16(filter1, 0xB);
    filter2 = _mm_unpacklo_epi8(zero, filter2);
    filter2 = _mm_srai_epi16(filter2, 0xB);

    // Filter1 >> 3
    filt = _mm_packs_epi16(filter2, _mm_subs_epi16(zero, filter1));
    qs0ps0 = _mm_xor_si128(_mm_adds_epi8(qs0ps0, filt), t80);

    // filt >> 1
    filt = _mm_adds_epi16(filter1, t1);
    filt = _mm_srai_epi16(filt, 1);
    filt = _mm_andnot_si128(_mm_srai_epi16(_mm_unpacklo_epi8(zero, hev), 0x8),
                            filt);
    filt = _mm_packs_epi16(filt, _mm_subs_epi16(zero, filt));
    qs1ps1 = _mm_xor_si128(_mm_adds_epi8(qs1ps1, filt), t80);
    // loopfilter done

    {
      __m128i work;
      flat = _mm_max_epu8(abs_diff(q2p2, q0p0), abs_diff(q3p3, q0p0));
      flat = _mm_max_epu8(abs_p1p0, flat);
      flat = _mm_max_epu8(flat, _mm_srli_si128(flat, 8));
      flat = _mm_subs_epu8(flat, one);
      flat = _mm_cmpeq_epi8(flat, zero);
      flat = _mm_and_si128(flat, mask);

      q5p5 = _mm_loadl_epi64((__m128i *)(s - 6 * p));
      q5p5 = _mm_castps_si128(
          _mm_loadh_pi(_mm_castsi128_ps(q5p5), (__m64 *)(s + 5 * p)));

      q6p6 = _mm_loadl_epi64((__m128i *)(s - 7 * p));
      q6p6 = _mm_castps_si128(
          _mm_loadh_pi(_mm_castsi128_ps(q6p6), (__m64 *)(s + 6 * p)));
      flat2 = _mm_max_epu8(abs_diff(q4p4, q0p0), abs_diff(q5p5, q0p0));
      work = abs_diff(q6p6, q0p0);
      flat2 = _mm_max_epu8(work, flat2);
      flat2 = _mm_max_epu8(flat2, _mm_srli_si128(flat2, 8));
      flat2 = _mm_subs_epu8(flat2, one);
      flat2 = _mm_cmpeq_epi8(flat2, zero);
      flat2 = _mm_and_si128(flat2, flat);  // flat2 & flat & mask
    }
    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    // flat and wide flat calculations
    {
      const __m128i eight = _mm_set1_epi16(8);
      const __m128i four = _mm_set1_epi16(4);
      __m128i p6_16, p5_16, p4_16, p3_16, p2_16, p1_16, p0_16;
      __m128i q6_16, q5_16, q4_16, q3_16, q2_16, q1_16, q0_16;
      __m128i pixelFilter_p, pixelFilter_q;
      __m128i pixetFilter_p2p1p0, pixetFilter_q2q1q0;
      __m128i sum_p6, sum_q6;
      __m128i sum_p3, sum_q3, res_p, res_q;

      p6_16 = _mm_unpacklo_epi8(q6p6, zero);
      p5_16 = _mm_unpacklo_epi8(q5p5, zero);
      p4_16 = _mm_unpacklo_epi8(q4p4, zero);
      p3_16 = _mm_unpacklo_epi8(q3p3, zero);
      p2_16 = _mm_unpacklo_epi8(q2p2, zero);
      p1_16 = _mm_unpacklo_epi8(q1p1, zero);
      p0_16 = _mm_unpacklo_epi8(q0p0, zero);
      q0_16 = _mm_unpackhi_epi8(q0p0, zero);
      q1_16 = _mm_unpackhi_epi8(q1p1, zero);
      q2_16 = _mm_unpackhi_epi8(q2p2, zero);
      q3_16 = _mm_unpackhi_epi8(q3p3, zero);
      q4_16 = _mm_unpackhi_epi8(q4p4, zero);
      q5_16 = _mm_unpackhi_epi8(q5p5, zero);
      q6_16 = _mm_unpackhi_epi8(q6p6, zero);
      pixelFilter_p = _mm_add_epi16(p5_16, _mm_add_epi16(p4_16, p3_16));
      pixelFilter_q = _mm_add_epi16(q5_16, _mm_add_epi16(q4_16, q3_16));

      pixetFilter_p2p1p0 = _mm_add_epi16(p0_16, _mm_add_epi16(p2_16, p1_16));
      pixelFilter_p = _mm_add_epi16(pixelFilter_p, pixetFilter_p2p1p0);

      pixetFilter_q2q1q0 = _mm_add_epi16(q0_16, _mm_add_epi16(q2_16, q1_16));
      pixelFilter_q = _mm_add_epi16(pixelFilter_q, pixetFilter_q2q1q0);
      pixelFilter_p =
          _mm_add_epi16(eight, _mm_add_epi16(pixelFilter_p, pixelFilter_q));
      pixetFilter_p2p1p0 = _mm_add_epi16(
          four, _mm_add_epi16(pixetFilter_p2p1p0, pixetFilter_q2q1q0));
      res_p = _mm_srli_epi16(
          _mm_add_epi16(pixelFilter_p,
                        _mm_add_epi16(_mm_add_epi16(p6_16, p0_16),
                                      _mm_add_epi16(p1_16, q0_16))),
          4);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(pixelFilter_p,
                        _mm_add_epi16(_mm_add_epi16(q6_16, q0_16),
                                      _mm_add_epi16(p0_16, q1_16))),
          4);
      flat2_q0p0 = _mm_packus_epi16(res_p, res_q);

      res_p = _mm_srli_epi16(
          _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(p3_16, p0_16)), 3);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(q3_16, q0_16)), 3);

      flat_q0p0 = _mm_packus_epi16(res_p, res_q);

      sum_p6 = _mm_add_epi16(p6_16, p6_16);
      sum_q6 = _mm_add_epi16(q6_16, q6_16);
      sum_p3 = _mm_add_epi16(p3_16, p3_16);
      sum_q3 = _mm_add_epi16(q3_16, q3_16);

      pixelFilter_q = _mm_sub_epi16(pixelFilter_p, p5_16);
      pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q5_16);

      res_p = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_p,
              _mm_add_epi16(sum_p6,
                            _mm_add_epi16(p1_16, _mm_add_epi16(p2_16, p0_16)))),
          4);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_q,
              _mm_add_epi16(sum_q6,
                            _mm_add_epi16(q1_16, _mm_add_epi16(q0_16, q2_16)))),
          4);
      flat2_q1p1 = _mm_packus_epi16(res_p, res_q);

      pixetFilter_q2q1q0 = _mm_sub_epi16(pixetFilter_p2p1p0, p2_16);
      pixetFilter_p2p1p0 = _mm_sub_epi16(pixetFilter_p2p1p0, q2_16);
      res_p = _mm_srli_epi16(
          _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(sum_p3, p1_16)), 3);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(pixetFilter_q2q1q0, _mm_add_epi16(sum_q3, q1_16)), 3);
      flat_q1p1 = _mm_packus_epi16(res_p, res_q);

      sum_p6 = _mm_add_epi16(sum_p6, p6_16);
      sum_q6 = _mm_add_epi16(sum_q6, q6_16);
      sum_p3 = _mm_add_epi16(sum_p3, p3_16);
      sum_q3 = _mm_add_epi16(sum_q3, q3_16);

      pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q4_16);
      pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p4_16);

      res_p = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_p,
              _mm_add_epi16(sum_p6,
                            _mm_add_epi16(p2_16, _mm_add_epi16(p3_16, p1_16)))),
          4);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_q,
              _mm_add_epi16(sum_q6,
                            _mm_add_epi16(q2_16, _mm_add_epi16(q1_16, q3_16)))),
          4);
      flat2_q2p2 = _mm_packus_epi16(res_p, res_q);

      pixetFilter_p2p1p0 = _mm_sub_epi16(pixetFilter_p2p1p0, q1_16);
      pixetFilter_q2q1q0 = _mm_sub_epi16(pixetFilter_q2q1q0, p1_16);

      res_p = _mm_srli_epi16(
          _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(sum_p3, p2_16)), 3);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(pixetFilter_q2q1q0, _mm_add_epi16(sum_q3, q2_16)), 3);
      flat_q2p2 = _mm_packus_epi16(res_p, res_q);

      sum_p6 = _mm_add_epi16(sum_p6, p6_16);
      sum_q6 = _mm_add_epi16(sum_q6, q6_16);

      pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q3_16);
      pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p3_16);

      res_p = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_p,
              _mm_add_epi16(sum_p6,
                            _mm_add_epi16(p3_16, _mm_add_epi16(p4_16, p2_16)))),
          4);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_q,
              _mm_add_epi16(sum_q6,
                            _mm_add_epi16(q3_16, _mm_add_epi16(q2_16, q4_16)))),
          4);
      flat2_q3p3 = _mm_packus_epi16(res_p, res_q);

      sum_p6 = _mm_add_epi16(sum_p6, p6_16);
      sum_q6 = _mm_add_epi16(sum_q6, q6_16);

      pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q2_16);
      pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p2_16);

      res_p = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_p,
              _mm_add_epi16(sum_p6,
                            _mm_add_epi16(p4_16, _mm_add_epi16(p5_16, p3_16)))),
          4);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_q,
              _mm_add_epi16(sum_q6,
                            _mm_add_epi16(q4_16, _mm_add_epi16(q3_16, q5_16)))),
          4);
      flat2_q4p4 = _mm_packus_epi16(res_p, res_q);

      sum_p6 = _mm_add_epi16(sum_p6, p6_16);
      sum_q6 = _mm_add_epi16(sum_q6, q6_16);
      pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q1_16);
      pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p1_16);

      res_p = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_p,
              _mm_add_epi16(sum_p6,
                            _mm_add_epi16(p5_16, _mm_add_epi16(p6_16, p4_16)))),
          4);
      res_q = _mm_srli_epi16(
          _mm_add_epi16(
              pixelFilter_q,
              _mm_add_epi16(sum_q6,
                            _mm_add_epi16(q5_16, _mm_add_epi16(q6_16, q4_16)))),
          4);
      flat2_q5p5 = _mm_packus_epi16(res_p, res_q);
    }
    // wide flat
    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    flat = _mm_shuffle_epi32(flat, 68);
    flat2 = _mm_shuffle_epi32(flat2, 68);

    q2p2 = _mm_andnot_si128(flat, q2p2);
    flat_q2p2 = _mm_and_si128(flat, flat_q2p2);
    q2p2 = _mm_or_si128(q2p2, flat_q2p2);

    qs1ps1 = _mm_andnot_si128(flat, qs1ps1);
    flat_q1p1 = _mm_and_si128(flat, flat_q1p1);
    q1p1 = _mm_or_si128(qs1ps1, flat_q1p1);

    qs0ps0 = _mm_andnot_si128(flat, qs0ps0);
    flat_q0p0 = _mm_and_si128(flat, flat_q0p0);
    q0p0 = _mm_or_si128(qs0ps0, flat_q0p0);

    q5p5 = _mm_andnot_si128(flat2, q5p5);
    flat2_q5p5 = _mm_and_si128(flat2, flat2_q5p5);
    q5p5 = _mm_or_si128(q5p5, flat2_q5p5);
    store_buffer_horz_8(q5p5, p, 5, s);

    q4p4 = _mm_andnot_si128(flat2, q4p4);
    flat2_q4p4 = _mm_and_si128(flat2, flat2_q4p4);
    q4p4 = _mm_or_si128(q4p4, flat2_q4p4);
    store_buffer_horz_8(q4p4, p, 4, s);

    q3p3 = _mm_andnot_si128(flat2, q3p3);
    flat2_q3p3 = _mm_and_si128(flat2, flat2_q3p3);
    q3p3 = _mm_or_si128(q3p3, flat2_q3p3);
    store_buffer_horz_8(q3p3, p, 3, s);

    q2p2 = _mm_andnot_si128(flat2, q2p2);
    flat2_q2p2 = _mm_and_si128(flat2, flat2_q2p2);
    q2p2 = _mm_or_si128(q2p2, flat2_q2p2);
    store_buffer_horz_8(q2p2, p, 2, s);

    q1p1 = _mm_andnot_si128(flat2, q1p1);
    flat2_q1p1 = _mm_and_si128(flat2, flat2_q1p1);
    q1p1 = _mm_or_si128(q1p1, flat2_q1p1);
    store_buffer_horz_8(q1p1, p, 1, s);

    q0p0 = _mm_andnot_si128(flat2, q0p0);
    flat2_q0p0 = _mm_and_si128(flat2, flat2_q0p0);
    q0p0 = _mm_or_si128(q0p0, flat2_q0p0);
    store_buffer_horz_8(q0p0, p, 0, s);
  }
}

static INLINE __m128i filter_add2_sub2(const __m128i *const total,
                                       const __m128i *const a1,
                                       const __m128i *const a2,
                                       const __m128i *const s1,
                                       const __m128i *const s2) {
  __m128i x = _mm_add_epi16(*a1, *total);
  x = _mm_add_epi16(_mm_sub_epi16(x, _mm_add_epi16(*s1, *s2)), *a2);
  return x;
}

static INLINE __m128i filter8_mask(const __m128i *const flat,
                                   const __m128i *const other_filt,
                                   const __m128i *const f8_lo,
                                   const __m128i *const f8_hi) {
  const __m128i f8 =
      _mm_packus_epi16(_mm_srli_epi16(*f8_lo, 3), _mm_srli_epi16(*f8_hi, 3));
  const __m128i result = _mm_and_si128(*flat, f8);
  return _mm_or_si128(_mm_andnot_si128(*flat, *other_filt), result);
}

static INLINE __m128i filter16_mask(const __m128i *const flat,
                                    const __m128i *const other_filt,
                                    const __m128i *const f_lo,
                                    const __m128i *const f_hi) {
  const __m128i f =
      _mm_packus_epi16(_mm_srli_epi16(*f_lo, 4), _mm_srli_epi16(*f_hi, 4));
  const __m128i result = _mm_and_si128(*flat, f);
  return _mm_or_si128(_mm_andnot_si128(*flat, *other_filt), result);
}

static AOM_FORCE_INLINE void lpf_internal_6_sse2(
    __m128i *p2, __m128i *q2, __m128i *p1, __m128i *q1, __m128i *p0,
    __m128i *q0, __m128i *q1q0, __m128i *p1p0, const unsigned char *_blimit,
    const unsigned char *_limit, const unsigned char *_thresh) {
  const __m128i zero = _mm_setzero_si128();
  const __m128i blimit = _mm_load_si128((const __m128i *)_blimit);
  const __m128i limit = _mm_load_si128((const __m128i *)_limit);
  const __m128i thresh = _mm_load_si128((const __m128i *)_thresh);
  __m128i mask, hev, flat;
  __m128i q2p2, q1p1, q0p0, p1q1, p0q0, flat_p1p0, flat_q0q1;
  __m128i p2_16, q2_16, p1_16, q1_16, p0_16, q0_16;
  __m128i ps1ps0, qs1qs0;

  q2p2 = _mm_unpacklo_epi64(*p2, *q2);
  q1p1 = _mm_unpacklo_epi64(*p1, *q1);
  q0p0 = _mm_unpacklo_epi64(*p0, *q0);

  p1q1 = _mm_shuffle_epi32(q1p1, 78);
  p0q0 = _mm_shuffle_epi32(q0p0, 78);

  const __m128i one = _mm_set1_epi8(1);
  const __m128i fe = _mm_set1_epi8(0xfe);
  const __m128i ff = _mm_cmpeq_epi8(fe, fe);
  {
    // filter_mask and hev_mask
    __m128i abs_p1q1, abs_p0q0, abs_q1q0, abs_p1p0, work;
    abs_p1p0 = abs_diff(q1p1, q0p0);
    abs_q1q0 = _mm_srli_si128(abs_p1p0, 8);

    abs_p0q0 = abs_diff(q0p0, p0q0);
    abs_p1q1 = abs_diff(q1p1, p1q1);

    // considering sse doesn't have unsigned elements comparison the idea is
    // to find at least one case when X > limit, it means the corresponding
    // mask bit is set.
    // to achieve that we find global max value of all inputs of abs(x-y) or
    // (abs(p0 - q0) * 2 + abs(p1 - q1) / 2 If it is > limit the mask is set
    // otherwise - not

    flat = _mm_max_epu8(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu8(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi8(hev, zero), ff);
    // replicate for the further "merged variables" usage
    hev = _mm_unpacklo_epi64(hev, hev);

    abs_p0q0 = _mm_adds_epu8(abs_p0q0, abs_p0q0);
    abs_p1q1 = _mm_srli_epi16(_mm_and_si128(abs_p1q1, fe), 1);
    mask = _mm_subs_epu8(_mm_adds_epu8(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi8(mask, zero), ff);
    // mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;
    mask = _mm_max_epu8(abs_p1p0, mask);
    // mask |= (abs(p1 - p0) > limit) * -1;
    // mask |= (abs(q1 - q0) > limit) * -1;

    work = abs_diff(q2p2, q1p1);
    mask = _mm_max_epu8(work, mask);
    mask = _mm_max_epu8(mask, _mm_srli_si128(mask, 8));
    mask = _mm_subs_epu8(mask, limit);
    mask = _mm_cmpeq_epi8(mask, zero);
    // replicate for the further "merged variables" usage
    mask = _mm_unpacklo_epi64(mask, mask);

    // flat_mask
    flat = _mm_max_epu8(abs_diff(q2p2, q0p0), abs_p1p0);
    flat = _mm_max_epu8(flat, _mm_srli_si128(flat, 8));
    flat = _mm_subs_epu8(flat, one);
    flat = _mm_cmpeq_epi8(flat, zero);
    flat = _mm_and_si128(flat, mask);
    // replicate for the further "merged variables" usage
    flat = _mm_unpacklo_epi64(flat, flat);
  }

  // 5 tap filter
  {
    const __m128i four = _mm_set1_epi16(4);

    __m128i workp_a, workp_b, workp_shft0, workp_shft1;
    p2_16 = _mm_unpacklo_epi8(*p2, zero);
    p1_16 = _mm_unpacklo_epi8(*p1, zero);
    p0_16 = _mm_unpacklo_epi8(*p0, zero);
    q0_16 = _mm_unpacklo_epi8(*q0, zero);
    q1_16 = _mm_unpacklo_epi8(*q1, zero);
    q2_16 = _mm_unpacklo_epi8(*q2, zero);

    // op1
    workp_a = _mm_add_epi16(_mm_add_epi16(p0_16, p0_16),
                            _mm_add_epi16(p1_16, p1_16));  // p0 *2 + p1 * 2
    workp_a = _mm_add_epi16(_mm_add_epi16(workp_a, four),
                            p2_16);  // p2 + p0 * 2 + p1 * 2 + 4

    workp_b = _mm_add_epi16(_mm_add_epi16(p2_16, p2_16), q0_16);
    workp_shft0 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b),
                                 3);  // p2 * 3 + p1 * 2 + p0 * 2 + q0 + 4

    // op0
    workp_b = _mm_add_epi16(_mm_add_epi16(q0_16, q0_16), q1_16);  // q0 * 2 + q1
    workp_a = _mm_add_epi16(workp_a,
                            workp_b);  // p2 + p0 * 2 + p1 * 2 + q0 * 2 + q1 + 4
    workp_shft1 = _mm_srli_epi16(workp_a, 3);

    flat_p1p0 = _mm_packus_epi16(workp_shft1, workp_shft0);

    // oq0
    workp_a = _mm_sub_epi16(_mm_sub_epi16(workp_a, p2_16),
                            p1_16);  // p0 * 2 + p1  + q0 * 2 + q1 + 4
    workp_b = _mm_add_epi16(q1_16, q2_16);
    workp_a = _mm_add_epi16(
        workp_a, workp_b);  // p0 * 2 + p1  + q0 * 2 + q1 * 2 + q2 + 4
    workp_shft0 = _mm_srli_epi16(workp_a, 3);

    // oq1
    workp_a = _mm_sub_epi16(_mm_sub_epi16(workp_a, p1_16),
                            p0_16);  // p0   + q0 * 2 + q1 * 2 + q2 + 4
    workp_b = _mm_add_epi16(q2_16, q2_16);
    workp_shft1 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b),
                                 3);  // p0  + q0 * 2 + q1 * 2 + q2 * 3 + 4

    flat_q0q1 = _mm_packus_epi16(workp_shft0, workp_shft1);
  }

  // lp filter
  *p1p0 = _mm_unpacklo_epi64(q0p0, q1p1);
  *q1q0 = _mm_unpackhi_epi64(q0p0, q1p1);

  filter4_sse2(p1p0, q1q0, &hev, &mask, &qs1qs0, &ps1ps0);

  qs1qs0 = _mm_andnot_si128(flat, qs1qs0);
  *q1q0 = _mm_and_si128(flat, flat_q0q1);
  *q1q0 = _mm_or_si128(qs1qs0, *q1q0);

  ps1ps0 = _mm_andnot_si128(flat, ps1ps0);
  *p1p0 = _mm_and_si128(flat, flat_p1p0);
  *p1p0 = _mm_or_si128(ps1ps0, *p1p0);
}

void aom_lpf_horizontal_6_sse2(unsigned char *s, int p,
                               const unsigned char *_blimit,
                               const unsigned char *_limit,
                               const unsigned char *_thresh) {
  __m128i p2, p1, p0, q0, q1, q2;
  __m128i p1p0, q1q0;

  p2 = _mm_loadl_epi64((__m128i *)(s - 3 * p));
  p1 = _mm_loadl_epi64((__m128i *)(s - 2 * p));
  p0 = _mm_loadl_epi64((__m128i *)(s - 1 * p));
  q0 = _mm_loadl_epi64((__m128i *)(s - 0 * p));
  q1 = _mm_loadl_epi64((__m128i *)(s + 1 * p));
  q2 = _mm_loadl_epi64((__m128i *)(s + 2 * p));

  lpf_internal_6_sse2(&p2, &q2, &p1, &q1, &p0, &q0, &q1q0, &p1p0, _blimit,
                      _limit, _thresh);

  xx_storel_32(s - 1 * p, p1p0);
  xx_storel_32(s - 2 * p, _mm_srli_si128(p1p0, 8));
  xx_storel_32(s + 0 * p, q1q0);
  xx_storel_32(s + 1 * p, _mm_srli_si128(q1q0, 8));
}

void aom_lpf_horizontal_8_sse2(unsigned char *s, int p,
                               const unsigned char *_blimit,
                               const unsigned char *_limit,
                               const unsigned char *_thresh) {
  const __m128i zero = _mm_setzero_si128();
  const __m128i blimit = _mm_load_si128((const __m128i *)_blimit);
  const __m128i limit = _mm_load_si128((const __m128i *)_limit);
  const __m128i thresh = _mm_load_si128((const __m128i *)_thresh);
  __m128i mask, hev, flat;
  __m128i p2, p1, p0, q0, q1, q2, p3, q3, q3p3, flat_p1p0, flat_q0q1;
  __m128i q2p2, q1p1, q0p0, p1q1, p0q0;
  __m128i p1p0, q1q0, ps1ps0, qs1qs0;
  __m128i work_a, op2, oq2;

  __m128i p2_8, p1_8, p0_8, q0_8, q1_8, q2_8, p3_8, q3_8;
  p2_8 = _mm_loadl_epi64((__m128i *)(s - 3 * p));
  p1_8 = _mm_loadl_epi64((__m128i *)(s - 2 * p));
  p0_8 = _mm_loadl_epi64((__m128i *)(s - 1 * p));
  q0_8 = _mm_loadl_epi64((__m128i *)(s - 0 * p));
  q1_8 = _mm_loadl_epi64((__m128i *)(s + 1 * p));
  q2_8 = _mm_loadl_epi64((__m128i *)(s + 2 * p));
  p3_8 = _mm_loadl_epi64((__m128i *)(s - 4 * p));
  q3_8 = _mm_loadl_epi64((__m128i *)(s + 3 * p));

  q3p3 = _mm_unpacklo_epi64(p3_8, q3_8);
  q2p2 = _mm_unpacklo_epi64(p2_8, q2_8);
  q1p1 = _mm_unpacklo_epi64(p1_8, q1_8);
  q0p0 = _mm_unpacklo_epi64(p0_8, q0_8);

  p1q1 = _mm_shuffle_epi32(q1p1, 78);
  p0q0 = _mm_shuffle_epi32(q0p0, 78);

  {
    // filter_mask and hev_mask

    // considering sse doesn't have unsigned elements comparison the idea is to
    // find at least one case when X > limit, it means the corresponding  mask
    // bit is set.
    // to achieve that we find global max value of all inputs of abs(x-y) or
    // (abs(p0 - q0) * 2 + abs(p1 - q1) / 2 If it is > limit the mask is set
    // otherwise - not

    const __m128i one = _mm_set1_epi8(1);
    const __m128i fe = _mm_set1_epi8(0xfe);
    const __m128i ff = _mm_cmpeq_epi8(fe, fe);
    __m128i abs_p1q1, abs_p0q0, abs_q1q0, abs_p1p0, work;

    abs_p1p0 = abs_diff(q1p1, q0p0);
    abs_q1q0 = _mm_srli_si128(abs_p1p0, 8);

    abs_p0q0 = abs_diff(q0p0, p0q0);
    abs_p1q1 = abs_diff(q1p1, p1q1);
    flat = _mm_max_epu8(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu8(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi8(hev, zero), ff);
    // replicate for the further "merged variables" usage
    hev = _mm_unpacklo_epi64(hev, hev);

    abs_p0q0 = _mm_adds_epu8(abs_p0q0, abs_p0q0);
    abs_p1q1 = _mm_srli_epi16(_mm_and_si128(abs_p1q1, fe), 1);
    mask = _mm_subs_epu8(_mm_adds_epu8(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi8(mask, zero), ff);
    // mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;
    mask = _mm_max_epu8(abs_p1p0, mask);
    // mask |= (abs(p1 - p0) > limit) * -1;
    // mask |= (abs(q1 - q0) > limit) * -1;

    work = _mm_max_epu8(abs_diff(q2p2, q1p1), abs_diff(q3p3, q2p2));

    mask = _mm_max_epu8(work, mask);
    mask = _mm_max_epu8(mask, _mm_srli_si128(mask, 8));
    mask = _mm_subs_epu8(mask, limit);
    mask = _mm_cmpeq_epi8(mask, zero);
    // replicate for the further "merged variables" usage
    mask = _mm_unpacklo_epi64(mask, mask);

    // flat_mask4

    flat = _mm_max_epu8(abs_diff(q2p2, q0p0), abs_diff(q3p3, q0p0));
    flat = _mm_max_epu8(abs_p1p0, flat);

    flat = _mm_max_epu8(flat, _mm_srli_si128(flat, 8));
    flat = _mm_subs_epu8(flat, one);
    flat = _mm_cmpeq_epi8(flat, zero);
    flat = _mm_and_si128(flat, mask);
    // replicate for the further "merged variables" usage
    flat = _mm_unpacklo_epi64(flat, flat);
  }

  // filter8
  {
    const __m128i four = _mm_set1_epi16(4);

    __m128i workp_a, workp_b, workp_shft0, workp_shft1;
    p2 = _mm_unpacklo_epi8(p2_8, zero);
    p1 = _mm_unpacklo_epi8(p1_8, zero);
    p0 = _mm_unpacklo_epi8(p0_8, zero);
    q0 = _mm_unpacklo_epi8(q0_8, zero);
    q1 = _mm_unpacklo_epi8(q1_8, zero);
    q2 = _mm_unpacklo_epi8(q2_8, zero);
    p3 = _mm_unpacklo_epi8(p3_8, zero);
    q3 = _mm_unpacklo_epi8(q3_8, zero);

    // op2
    workp_a = _mm_add_epi16(_mm_add_epi16(p3, p3), _mm_add_epi16(p2, p1));
    workp_a = _mm_add_epi16(_mm_add_epi16(workp_a, four), p0);
    workp_b = _mm_add_epi16(_mm_add_epi16(q0, p2), p3);
    workp_shft0 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
    op2 = _mm_packus_epi16(workp_shft0, workp_shft0);

    // op1
    workp_b = _mm_add_epi16(_mm_add_epi16(q0, q1), p1);
    workp_shft0 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);

    // op0
    workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p3), q2);
    workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, p1), p0);
    workp_shft1 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);

    flat_p1p0 = _mm_packus_epi16(workp_shft1, workp_shft0);

    // oq0
    workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p3), q3);
    workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, p0), q0);
    workp_shft0 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);

    // oq1
    workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p2), q3);
    workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, q0), q1);
    workp_shft1 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);

    flat_q0q1 = _mm_packus_epi16(workp_shft0, workp_shft1);

    // oq2
    workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p1), q3);
    workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, q1), q2);
    workp_shft1 = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
    oq2 = _mm_packus_epi16(workp_shft1, workp_shft1);
  }

  // lp filter - the same for 8 and 6 versions
  p1p0 = _mm_unpacklo_epi64(q0p0, q1p1);
  q1q0 = _mm_unpackhi_epi64(q0p0, q1p1);

  filter4_sse2(&p1p0, &q1q0, &hev, &mask, &qs1qs0, &ps1ps0);

  qs1qs0 = _mm_andnot_si128(flat, qs1qs0);
  q1q0 = _mm_and_si128(flat, flat_q0q1);
  q1q0 = _mm_or_si128(qs1qs0, q1q0);

  ps1ps0 = _mm_andnot_si128(flat, ps1ps0);
  p1p0 = _mm_and_si128(flat, flat_p1p0);
  p1p0 = _mm_or_si128(ps1ps0, p1p0);

  work_a = _mm_andnot_si128(flat, q2_8);
  q2 = _mm_and_si128(flat, oq2);
  q2 = _mm_or_si128(work_a, q2);

  work_a = _mm_andnot_si128(flat, p2_8);
  p2 = _mm_and_si128(flat, op2);
  p2 = _mm_or_si128(work_a, p2);

  xx_storel_32(s - 1 * p, p1p0);
  xx_storel_32(s - 2 * p, _mm_srli_si128(p1p0, 8));
  xx_storel_32(s + 0 * p, q1q0);
  xx_storel_32(s + 1 * p, _mm_srli_si128(q1q0, 8));
  xx_storel_32(s - 3 * p, p2);
  xx_storel_32(s + 2 * p, q2);
}
void aom_lpf_horizontal_14_dual_sse2(unsigned char *s, int p,
                                     const unsigned char *_blimit,
                                     const unsigned char *_limit,
                                     const unsigned char *_thresh) {
  aom_lpf_horizontal_14_sse2(s, p, _blimit, _limit, _thresh);
  aom_lpf_horizontal_14_sse2(s + 4, p, _blimit, _limit, _thresh);
}

void aom_lpf_horizontal_8_dual_sse2(uint8_t *s, int p, const uint8_t *_blimit0,
                                    const uint8_t *_limit0,
                                    const uint8_t *_thresh0,
                                    const uint8_t *_blimit1,
                                    const uint8_t *_limit1,
                                    const uint8_t *_thresh1) {
  DECLARE_ALIGNED(16, unsigned char, flat_op2[16]);
  DECLARE_ALIGNED(16, unsigned char, flat_op1[16]);
  DECLARE_ALIGNED(16, unsigned char, flat_op0[16]);
  DECLARE_ALIGNED(16, unsigned char, flat_oq2[16]);
  DECLARE_ALIGNED(16, unsigned char, flat_oq1[16]);
  DECLARE_ALIGNED(16, unsigned char, flat_oq0[16]);
  const __m128i zero = _mm_setzero_si128();
  const __m128i blimit =
      _mm_unpacklo_epi64(_mm_load_si128((const __m128i *)_blimit0),
                         _mm_load_si128((const __m128i *)_blimit1));
  const __m128i limit =
      _mm_unpacklo_epi64(_mm_load_si128((const __m128i *)_limit0),
                         _mm_load_si128((const __m128i *)_limit1));
  const __m128i thresh =
      _mm_unpacklo_epi64(_mm_load_si128((const __m128i *)_thresh0),
                         _mm_load_si128((const __m128i *)_thresh1));

  __m128i mask, hev, flat;
  __m128i p3, p2, p1, p0, q0, q1, q2, q3;

  p3 = _mm_loadu_si128((__m128i *)(s - 4 * p));
  p2 = _mm_loadu_si128((__m128i *)(s - 3 * p));
  p1 = _mm_loadu_si128((__m128i *)(s - 2 * p));
  p0 = _mm_loadu_si128((__m128i *)(s - 1 * p));
  q0 = _mm_loadu_si128((__m128i *)(s - 0 * p));
  q1 = _mm_loadu_si128((__m128i *)(s + 1 * p));
  q2 = _mm_loadu_si128((__m128i *)(s + 2 * p));
  q3 = _mm_loadu_si128((__m128i *)(s + 3 * p));
  {
    const __m128i abs_p1p0 =
        _mm_or_si128(_mm_subs_epu8(p1, p0), _mm_subs_epu8(p0, p1));
    const __m128i abs_q1q0 =
        _mm_or_si128(_mm_subs_epu8(q1, q0), _mm_subs_epu8(q0, q1));
    const __m128i one = _mm_set1_epi8(1);
    const __m128i fe = _mm_set1_epi8(0xfe);
    const __m128i ff = _mm_cmpeq_epi8(abs_p1p0, abs_p1p0);
    __m128i abs_p0q0 =
        _mm_or_si128(_mm_subs_epu8(p0, q0), _mm_subs_epu8(q0, p0));
    __m128i abs_p1q1 =
        _mm_or_si128(_mm_subs_epu8(p1, q1), _mm_subs_epu8(q1, p1));
    __m128i work;

    // filter_mask and hev_mask
    flat = _mm_max_epu8(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu8(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi8(hev, zero), ff);

    abs_p0q0 = _mm_adds_epu8(abs_p0q0, abs_p0q0);
    abs_p1q1 = _mm_srli_epi16(_mm_and_si128(abs_p1q1, fe), 1);
    mask = _mm_subs_epu8(_mm_adds_epu8(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi8(mask, zero), ff);
    // mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;
    mask = _mm_max_epu8(flat, mask);
    // mask |= (abs(p1 - p0) > limit) * -1;
    // mask |= (abs(q1 - q0) > limit) * -1;
    work = _mm_max_epu8(
        _mm_or_si128(_mm_subs_epu8(p2, p1), _mm_subs_epu8(p1, p2)),
        _mm_or_si128(_mm_subs_epu8(p3, p2), _mm_subs_epu8(p2, p3)));
    mask = _mm_max_epu8(work, mask);
    work = _mm_max_epu8(
        _mm_or_si128(_mm_subs_epu8(q2, q1), _mm_subs_epu8(q1, q2)),
        _mm_or_si128(_mm_subs_epu8(q3, q2), _mm_subs_epu8(q2, q3)));
    mask = _mm_max_epu8(work, mask);
    mask = _mm_subs_epu8(mask, limit);
    mask = _mm_cmpeq_epi8(mask, zero);

    // flat_mask4
    work = _mm_max_epu8(
        _mm_or_si128(_mm_subs_epu8(p2, p0), _mm_subs_epu8(p0, p2)),
        _mm_or_si128(_mm_subs_epu8(q2, q0), _mm_subs_epu8(q0, q2)));
    flat = _mm_max_epu8(work, flat);
    work = _mm_max_epu8(
        _mm_or_si128(_mm_subs_epu8(p3, p0), _mm_subs_epu8(p0, p3)),
        _mm_or_si128(_mm_subs_epu8(q3, q0), _mm_subs_epu8(q0, q3)));
    flat = _mm_max_epu8(work, flat);
    flat = _mm_subs_epu8(flat, one);
    flat = _mm_cmpeq_epi8(flat, zero);
    flat = _mm_and_si128(flat, mask);
  }
  {
    const __m128i four = _mm_set1_epi16(4);
    unsigned char *src = s;
    int i = 0;

    do {
      __m128i workp_a, workp_b, workp_shft;
      p3 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src - 4 * p)), zero);
      p2 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src - 3 * p)), zero);
      p1 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src - 2 * p)), zero);
      p0 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src - 1 * p)), zero);
      q0 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src - 0 * p)), zero);
      q1 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src + 1 * p)), zero);
      q2 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src + 2 * p)), zero);
      q3 = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i *)(src + 3 * p)), zero);

      workp_a = _mm_add_epi16(_mm_add_epi16(p3, p3), _mm_add_epi16(p2, p1));
      workp_a = _mm_add_epi16(_mm_add_epi16(workp_a, four), p0);
      workp_b = _mm_add_epi16(_mm_add_epi16(q0, p2), p3);
      workp_shft = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
      _mm_storel_epi64((__m128i *)&flat_op2[i * 8],
                       _mm_packus_epi16(workp_shft, workp_shft));

      workp_b = _mm_add_epi16(_mm_add_epi16(q0, q1), p1);
      workp_shft = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
      _mm_storel_epi64((__m128i *)&flat_op1[i * 8],
                       _mm_packus_epi16(workp_shft, workp_shft));

      workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p3), q2);
      workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, p1), p0);
      workp_shft = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
      _mm_storel_epi64((__m128i *)&flat_op0[i * 8],
                       _mm_packus_epi16(workp_shft, workp_shft));

      workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p3), q3);
      workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, p0), q0);
      workp_shft = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
      _mm_storel_epi64((__m128i *)&flat_oq0[i * 8],
                       _mm_packus_epi16(workp_shft, workp_shft));

      workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p2), q3);
      workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, q0), q1);
      workp_shft = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
      _mm_storel_epi64((__m128i *)&flat_oq1[i * 8],
                       _mm_packus_epi16(workp_shft, workp_shft));

      workp_a = _mm_add_epi16(_mm_sub_epi16(workp_a, p1), q3);
      workp_b = _mm_add_epi16(_mm_sub_epi16(workp_b, q1), q2);
      workp_shft = _mm_srli_epi16(_mm_add_epi16(workp_a, workp_b), 3);
      _mm_storel_epi64((__m128i *)&flat_oq2[i * 8],
                       _mm_packus_epi16(workp_shft, workp_shft));

      src += 8;
    } while (++i < 2);
  }
  // lp filter
  {
    const __m128i t4 = _mm_set1_epi8(4);
    const __m128i t3 = _mm_set1_epi8(3);
    const __m128i t80 = _mm_set1_epi8(0x80);
    const __m128i te0 = _mm_set1_epi8(0xe0);
    const __m128i t1f = _mm_set1_epi8(0x1f);
    const __m128i t1 = _mm_set1_epi8(0x1);
    const __m128i t7f = _mm_set1_epi8(0x7f);

    const __m128i ps1 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s - 2 * p)), t80);
    const __m128i ps0 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s - 1 * p)), t80);
    const __m128i qs0 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s + 0 * p)), t80);
    const __m128i qs1 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s + 1 * p)), t80);
    __m128i filt;
    __m128i work_a;
    __m128i filter1, filter2;

    filt = _mm_and_si128(_mm_subs_epi8(ps1, qs1), hev);
    work_a = _mm_subs_epi8(qs0, ps0);
    filt = _mm_adds_epi8(filt, work_a);
    filt = _mm_adds_epi8(filt, work_a);
    filt = _mm_adds_epi8(filt, work_a);
    // (aom_filter + 3 * (qs0 - ps0)) & mask
    filt = _mm_and_si128(filt, mask);

    filter1 = _mm_adds_epi8(filt, t4);
    filter2 = _mm_adds_epi8(filt, t3);

    // Filter1 >> 3
    work_a = _mm_cmpgt_epi8(zero, filter1);
    filter1 = _mm_srli_epi16(filter1, 3);
    work_a = _mm_and_si128(work_a, te0);
    filter1 = _mm_and_si128(filter1, t1f);
    filter1 = _mm_or_si128(filter1, work_a);

    // Filter2 >> 3
    work_a = _mm_cmpgt_epi8(zero, filter2);
    filter2 = _mm_srli_epi16(filter2, 3);
    work_a = _mm_and_si128(work_a, te0);
    filter2 = _mm_and_si128(filter2, t1f);
    filter2 = _mm_or_si128(filter2, work_a);

    // filt >> 1
    filt = _mm_adds_epi8(filter1, t1);
    work_a = _mm_cmpgt_epi8(zero, filt);
    filt = _mm_srli_epi16(filt, 1);
    work_a = _mm_and_si128(work_a, t80);
    filt = _mm_and_si128(filt, t7f);
    filt = _mm_or_si128(filt, work_a);

    filt = _mm_andnot_si128(hev, filt);

    work_a = _mm_xor_si128(_mm_subs_epi8(qs0, filter1), t80);
    q0 = _mm_load_si128((__m128i *)flat_oq0);
    work_a = _mm_andnot_si128(flat, work_a);
    q0 = _mm_and_si128(flat, q0);
    q0 = _mm_or_si128(work_a, q0);

    work_a = _mm_xor_si128(_mm_subs_epi8(qs1, filt), t80);
    q1 = _mm_load_si128((__m128i *)flat_oq1);
    work_a = _mm_andnot_si128(flat, work_a);
    q1 = _mm_and_si128(flat, q1);
    q1 = _mm_or_si128(work_a, q1);

    work_a = _mm_loadu_si128((__m128i *)(s + 2 * p));
    q2 = _mm_load_si128((__m128i *)flat_oq2);
    work_a = _mm_andnot_si128(flat, work_a);
    q2 = _mm_and_si128(flat, q2);
    q2 = _mm_or_si128(work_a, q2);

    work_a = _mm_xor_si128(_mm_adds_epi8(ps0, filter2), t80);
    p0 = _mm_load_si128((__m128i *)flat_op0);
    work_a = _mm_andnot_si128(flat, work_a);
    p0 = _mm_and_si128(flat, p0);
    p0 = _mm_or_si128(work_a, p0);

    work_a = _mm_xor_si128(_mm_adds_epi8(ps1, filt), t80);
    p1 = _mm_load_si128((__m128i *)flat_op1);
    work_a = _mm_andnot_si128(flat, work_a);
    p1 = _mm_and_si128(flat, p1);
    p1 = _mm_or_si128(work_a, p1);

    work_a = _mm_loadu_si128((__m128i *)(s - 3 * p));
    p2 = _mm_load_si128((__m128i *)flat_op2);
    work_a = _mm_andnot_si128(flat, work_a);
    p2 = _mm_and_si128(flat, p2);
    p2 = _mm_or_si128(work_a, p2);

    _mm_storeu_si128((__m128i *)(s - 3 * p), p2);
    _mm_storeu_si128((__m128i *)(s - 2 * p), p1);
    _mm_storeu_si128((__m128i *)(s - 1 * p), p0);
    _mm_storeu_si128((__m128i *)(s + 0 * p), q0);
    _mm_storeu_si128((__m128i *)(s + 1 * p), q1);
    _mm_storeu_si128((__m128i *)(s + 2 * p), q2);
  }
}

void aom_lpf_horizontal_4_dual_sse2(unsigned char *s, int p,
                                    const unsigned char *_blimit0,
                                    const unsigned char *_limit0,
                                    const unsigned char *_thresh0,
                                    const unsigned char *_blimit1,
                                    const unsigned char *_limit1,
                                    const unsigned char *_thresh1) {
  const __m128i blimit =
      _mm_unpacklo_epi64(_mm_load_si128((const __m128i *)_blimit0),
                         _mm_load_si128((const __m128i *)_blimit1));
  const __m128i limit =
      _mm_unpacklo_epi64(_mm_load_si128((const __m128i *)_limit0),
                         _mm_load_si128((const __m128i *)_limit1));
  const __m128i thresh =
      _mm_unpacklo_epi64(_mm_load_si128((const __m128i *)_thresh0),
                         _mm_load_si128((const __m128i *)_thresh1));
  const __m128i zero = _mm_setzero_si128();
  __m128i p1, p0, q0, q1;
  __m128i mask, hev, flat;
  p1 = _mm_loadu_si128((__m128i *)(s - 2 * p));
  p0 = _mm_loadu_si128((__m128i *)(s - 1 * p));
  q0 = _mm_loadu_si128((__m128i *)(s - 0 * p));
  q1 = _mm_loadu_si128((__m128i *)(s + 1 * p));
  // filter_mask and hev_mask
  {
    const __m128i abs_p1p0 =
        _mm_or_si128(_mm_subs_epu8(p1, p0), _mm_subs_epu8(p0, p1));
    const __m128i abs_q1q0 =
        _mm_or_si128(_mm_subs_epu8(q1, q0), _mm_subs_epu8(q0, q1));
    const __m128i fe = _mm_set1_epi8(0xfe);
    const __m128i ff = _mm_cmpeq_epi8(abs_p1p0, abs_p1p0);
    __m128i abs_p0q0 =
        _mm_or_si128(_mm_subs_epu8(p0, q0), _mm_subs_epu8(q0, p0));
    __m128i abs_p1q1 =
        _mm_or_si128(_mm_subs_epu8(p1, q1), _mm_subs_epu8(q1, p1));
    flat = _mm_max_epu8(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu8(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi8(hev, zero), ff);

    abs_p0q0 = _mm_adds_epu8(abs_p0q0, abs_p0q0);
    abs_p1q1 = _mm_srli_epi16(_mm_and_si128(abs_p1q1, fe), 1);
    mask = _mm_subs_epu8(_mm_adds_epu8(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi8(mask, zero), ff);
    // mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;
    mask = _mm_max_epu8(flat, mask);
    mask = _mm_subs_epu8(mask, limit);
    mask = _mm_cmpeq_epi8(mask, zero);
  }

  // filter4
  {
    const __m128i t4 = _mm_set1_epi8(4);
    const __m128i t3 = _mm_set1_epi8(3);
    const __m128i t80 = _mm_set1_epi8(0x80);
    const __m128i te0 = _mm_set1_epi8(0xe0);
    const __m128i t1f = _mm_set1_epi8(0x1f);
    const __m128i t1 = _mm_set1_epi8(0x1);
    const __m128i t7f = _mm_set1_epi8(0x7f);

    const __m128i ps1 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s - 2 * p)), t80);
    const __m128i ps0 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s - 1 * p)), t80);
    const __m128i qs0 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s + 0 * p)), t80);
    const __m128i qs1 =
        _mm_xor_si128(_mm_loadu_si128((__m128i *)(s + 1 * p)), t80);
    __m128i filt;
    __m128i work_a;
    __m128i filter1, filter2;

    filt = _mm_and_si128(_mm_subs_epi8(ps1, qs1), hev);
    work_a = _mm_subs_epi8(qs0, ps0);
    filt = _mm_adds_epi8(filt, work_a);
    filt = _mm_adds_epi8(filt, work_a);
    filt = _mm_adds_epi8(filt, work_a);
    // (aom_filter + 3 * (qs0 - ps0)) & mask
    filt = _mm_and_si128(filt, mask);

    filter1 = _mm_adds_epi8(filt, t4);
    filter2 = _mm_adds_epi8(filt, t3);

    // Filter1 >> 3
    work_a = _mm_cmpgt_epi8(zero, filter1);
    filter1 = _mm_srli_epi16(filter1, 3);
    work_a = _mm_and_si128(work_a, te0);
    filter1 = _mm_and_si128(filter1, t1f);
    filter1 = _mm_or_si128(filter1, work_a);

    // Filter2 >> 3
    work_a = _mm_cmpgt_epi8(zero, filter2);
    filter2 = _mm_srli_epi16(filter2, 3);
    work_a = _mm_and_si128(work_a, te0);
    filter2 = _mm_and_si128(filter2, t1f);
    filter2 = _mm_or_si128(filter2, work_a);

    // filt >> 1
    filt = _mm_adds_epi8(filter1, t1);
    work_a = _mm_cmpgt_epi8(zero, filt);
    filt = _mm_srli_epi16(filt, 1);
    work_a = _mm_and_si128(work_a, t80);
    filt = _mm_and_si128(filt, t7f);
    filt = _mm_or_si128(filt, work_a);

    filt = _mm_andnot_si128(hev, filt);

    q0 = _mm_xor_si128(_mm_subs_epi8(qs0, filter1), t80);
    q1 = _mm_xor_si128(_mm_subs_epi8(qs1, filt), t80);
    p0 = _mm_xor_si128(_mm_adds_epi8(ps0, filter2), t80);
    p1 = _mm_xor_si128(_mm_adds_epi8(ps1, filt), t80);

    _mm_storeu_si128((__m128i *)(s - 2 * p), p1);
    _mm_storeu_si128((__m128i *)(s - 1 * p), p0);
    _mm_storeu_si128((__m128i *)(s + 0 * p), q0);
    _mm_storeu_si128((__m128i *)(s + 1 * p), q1);
  }
}

static INLINE void transpose8x16(unsigned char *in0, unsigned char *in1,
                                 int in_p, unsigned char *out, int out_p) {
  __m128i x0, x1, x2, x3, x4, x5, x6, x7;
  __m128i x8, x9, x10, x11, x12, x13, x14, x15;

  // 2-way interleave w/hoisting of unpacks
  x0 = _mm_loadl_epi64((__m128i *)in0);           // 1
  x1 = _mm_loadl_epi64((__m128i *)(in0 + in_p));  // 3
  x0 = _mm_unpacklo_epi8(x0, x1);                 // 1

  x2 = _mm_loadl_epi64((__m128i *)(in0 + 2 * in_p));  // 5
  x3 = _mm_loadl_epi64((__m128i *)(in0 + 3 * in_p));  // 7
  x1 = _mm_unpacklo_epi8(x2, x3);                     // 2

  x4 = _mm_loadl_epi64((__m128i *)(in0 + 4 * in_p));  // 9
  x5 = _mm_loadl_epi64((__m128i *)(in0 + 5 * in_p));  // 11
  x2 = _mm_unpacklo_epi8(x4, x5);                     // 3

  x6 = _mm_loadl_epi64((__m128i *)(in0 + 6 * in_p));  // 13
  x7 = _mm_loadl_epi64((__m128i *)(in0 + 7 * in_p));  // 15
  x3 = _mm_unpacklo_epi8(x6, x7);                     // 4
  x4 = _mm_unpacklo_epi16(x0, x1);                    // 9

  x8 = _mm_loadl_epi64((__m128i *)in1);           // 2
  x9 = _mm_loadl_epi64((__m128i *)(in1 + in_p));  // 4
  x8 = _mm_unpacklo_epi8(x8, x9);                 // 5
  x5 = _mm_unpacklo_epi16(x2, x3);                // 10

  x10 = _mm_loadl_epi64((__m128i *)(in1 + 2 * in_p));  // 6
  x11 = _mm_loadl_epi64((__m128i *)(in1 + 3 * in_p));  // 8
  x9 = _mm_unpacklo_epi8(x10, x11);                    // 6

  x12 = _mm_loadl_epi64((__m128i *)(in1 + 4 * in_p));  // 10
  x13 = _mm_loadl_epi64((__m128i *)(in1 + 5 * in_p));  // 12
  x10 = _mm_unpacklo_epi8(x12, x13);                   // 7
  x12 = _mm_unpacklo_epi16(x8, x9);                    // 11

  x14 = _mm_loadl_epi64((__m128i *)(in1 + 6 * in_p));  // 14
  x15 = _mm_loadl_epi64((__m128i *)(in1 + 7 * in_p));  // 16
  x11 = _mm_unpacklo_epi8(x14, x15);                   // 8
  x13 = _mm_unpacklo_epi16(x10, x11);                  // 12

  x6 = _mm_unpacklo_epi32(x4, x5);     // 13
  x7 = _mm_unpackhi_epi32(x4, x5);     // 14
  x14 = _mm_unpacklo_epi32(x12, x13);  // 15
  x15 = _mm_unpackhi_epi32(x12, x13);  // 16

  // Store first 4-line result
  _mm_storeu_si128((__m128i *)out, _mm_unpacklo_epi64(x6, x14));
  _mm_storeu_si128((__m128i *)(out + out_p), _mm_unpackhi_epi64(x6, x14));
  _mm_storeu_si128((__m128i *)(out + 2 * out_p), _mm_unpacklo_epi64(x7, x15));
  _mm_storeu_si128((__m128i *)(out + 3 * out_p), _mm_unpackhi_epi64(x7, x15));

  x4 = _mm_unpackhi_epi16(x0, x1);
  x5 = _mm_unpackhi_epi16(x2, x3);
  x12 = _mm_unpackhi_epi16(x8, x9);
  x13 = _mm_unpackhi_epi16(x10, x11);

  x6 = _mm_unpacklo_epi32(x4, x5);
  x7 = _mm_unpackhi_epi32(x4, x5);
  x14 = _mm_unpacklo_epi32(x12, x13);
  x15 = _mm_unpackhi_epi32(x12, x13);

  // Store second 4-line result
  _mm_storeu_si128((__m128i *)(out + 4 * out_p), _mm_unpacklo_epi64(x6, x14));
  _mm_storeu_si128((__m128i *)(out + 5 * out_p), _mm_unpackhi_epi64(x6, x14));
  _mm_storeu_si128((__m128i *)(out + 6 * out_p), _mm_unpacklo_epi64(x7, x15));
  _mm_storeu_si128((__m128i *)(out + 7 * out_p), _mm_unpackhi_epi64(x7, x15));
}

#define movq(p) _mm_loadl_epi64((const __m128i *)(p))
#define punpcklbw(r0, r1) _mm_unpacklo_epi8(r0, r1)
#define punpcklwd(r0, r1) _mm_unpacklo_epi16(r0, r1)
#define punpckhwd(r0, r1) _mm_unpackhi_epi16(r0, r1)
#define pshufd(r, imm) _mm_shuffle_epi32(r, imm)
enum { ROTATE_DWORD_RIGHT = 0x39 };
static INLINE void transpose16x4(uint8_t *pDst, const ptrdiff_t dstStride,
                                 const uint8_t *pSrc,
                                 const ptrdiff_t srcStride) {
  for (uint32_t idx = 0; idx < 2; idx += 1) {
    __m128i r0, r1, r2, r3;
    // load data
    r0 = movq(pSrc);
    r1 = movq(pSrc + srcStride);
    r2 = movq(pSrc + srcStride * 2);
    r3 = movq(pSrc + srcStride * 3);
    // transpose
    r0 = punpcklbw(r0, r1);
    r2 = punpcklbw(r2, r3);
    r1 = punpckhwd(r0, r2);
    r0 = punpcklwd(r0, r2);
    // store data
    xx_storel_32(pDst, r0);
    r0 = pshufd(r0, ROTATE_DWORD_RIGHT);
    xx_storel_32(pDst + dstStride, r0);
    r0 = pshufd(r0, ROTATE_DWORD_RIGHT);
    xx_storel_32(pDst + dstStride * 2, r0);
    r0 = pshufd(r0, ROTATE_DWORD_RIGHT);
    xx_storel_32(pDst + dstStride * 3, r0);
    xx_storel_32(pDst + dstStride * 4, r1);
    r1 = pshufd(r1, ROTATE_DWORD_RIGHT);
    xx_storel_32(pDst + dstStride * 5, r1);
    r1 = pshufd(r1, ROTATE_DWORD_RIGHT);
    xx_storel_32(pDst + dstStride * 6, r1);
    r1 = pshufd(r1, ROTATE_DWORD_RIGHT);
    xx_storel_32(pDst + dstStride * 7, r1);
    // advance the pointers
    pDst += dstStride * 8;
    pSrc += 8;
  }
}

static INLINE void transpose6x6_sse2(__m128i *x0, __m128i *x1, __m128i *x2,
                                     __m128i *x3, __m128i *x4, __m128i *x5,
                                     __m128i *d0d1, __m128i *d2d3,
                                     __m128i *d4d5) {
  __m128i w0, w1, w2, w4, w5;
  // x0  00 01 02 03 04 05 xx xx
  // x1  10 11 12 13 14 15 xx xx

  w0 = _mm_unpacklo_epi8(*x0, *x1);
  // 00 10 01 11 02 12 03 13  04 14 05 15 xx xx  xx xx

  // x2 20 21 22 23 24 25
  // x3 30 31 32 33 34 35

  w1 = _mm_unpacklo_epi8(
      *x2, *x3);  // 20 30 21 31 22 32 23 33  24 34 25 35 xx xx  xx xx

  // x4 40 41 42 43 44 45
  // x5 50 51 52 53 54 55

  w2 = _mm_unpacklo_epi8(*x4, *x5);  // 40 50 41 51 42 52 43 53 44 54 45 55

  w4 = _mm_unpacklo_epi16(
      w0, w1);  // 00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33
  w5 = _mm_unpacklo_epi16(
      w2, w0);  // 40 50 xx xx 41 51 xx xx 42 52 xx xx 43 53 xx xx

  *d0d1 = _mm_unpacklo_epi32(
      w4, w5);  // 00 10 20 30 40 50 xx xx 01 11 21 31 41 51 xx xx

  *d2d3 = _mm_unpackhi_epi32(
      w4, w5);  // 02 12 22 32 42 52 xx xx 03 13 23 33 43 53 xx xx

  w4 = _mm_unpackhi_epi16(
      w0, w1);  // 04 14 24 34 05 15 25 35 xx xx xx xx xx xx xx xx
  w5 = _mm_unpackhi_epi16(
      w2, *x3);  // 44 54 xx xx 45 55 xx xx xx xx xx xx xx xx xx xx
  *d4d5 = _mm_unpacklo_epi32(
      w4, w5);  // 04 14 24 34 44 54 xx xx 05 15 25 35 45 55 xx xx
}

static INLINE void transpose8x8(unsigned char *src[], int in_p,
                                unsigned char *dst[], int out_p,
                                int num_8x8_to_transpose) {
  int idx8x8 = 0;
  __m128i x0, x1, x2, x3, x4, x5, x6, x7;
  do {
    unsigned char *in = src[idx8x8];
    unsigned char *out = dst[idx8x8];

    x0 =
        _mm_loadl_epi64((__m128i *)(in + 0 * in_p));  // 00 01 02 03 04 05 06 07
    x1 =
        _mm_loadl_epi64((__m128i *)(in + 1 * in_p));  // 10 11 12 13 14 15 16 17

    x0 = _mm_unpacklo_epi8(
        x0, x1);  // 00 10 01 11 02 12 03 13 04 14 05 15 06 16 07 17

    x2 =
        _mm_loadl_epi64((__m128i *)(in + 2 * in_p));  // 20 21 22 23 24 25 26 27
    x3 =
        _mm_loadl_epi64((__m128i *)(in + 3 * in_p));  // 30 31 32 33 34 35 36 37

    x1 = _mm_unpacklo_epi8(
        x2, x3);  // 20 30 21 31 22 32 23 33 24 34 25 35 26 36 27 37

    x4 =
        _mm_loadl_epi64((__m128i *)(in + 4 * in_p));  // 40 41 42 43 44 45 46 47
    x5 =
        _mm_loadl_epi64((__m128i *)(in + 5 * in_p));  // 50 51 52 53 54 55 56 57
    // 40 50 41 51 42 52 43 53 44 54 45 55 46 56 47 57
    x2 = _mm_unpacklo_epi8(x4, x5);

    x6 =
        _mm_loadl_epi64((__m128i *)(in + 6 * in_p));  // 60 61 62 63 64 65 66 67
    x7 =
        _mm_loadl_epi64((__m128i *)(in + 7 * in_p));  // 70 71 72 73 74 75 76 77
    // 60 70 61 71 62 72 63 73 64 74 65 75 66 76 67 77
    x3 = _mm_unpacklo_epi8(x6, x7);

    // 00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33
    x4 = _mm_unpacklo_epi16(x0, x1);
    // 40 50 60 70 41 51 61 71 42 52 62 72 43 53 63 73
    x5 = _mm_unpacklo_epi16(x2, x3);
    // 00 10 20 30 40 50 60 70 01 11 21 31 41 51 61 71
    x6 = _mm_unpacklo_epi32(x4, x5);
    _mm_storel_pd((double *)(out + 0 * out_p),
                  _mm_castsi128_pd(x6));  // 00 10 20 30 40 50 60 70
    _mm_storeh_pd((double *)(out + 1 * out_p),
                  _mm_castsi128_pd(x6));  // 01 11 21 31 41 51 61 71
    // 02 12 22 32 42 52 62 72 03 13 23 33 43 53 63 73
    x7 = _mm_unpackhi_epi32(x4, x5);
    _mm_storel_pd((double *)(out + 2 * out_p),
                  _mm_castsi128_pd(x7));  // 02 12 22 32 42 52 62 72
    _mm_storeh_pd((double *)(out + 3 * out_p),
                  _mm_castsi128_pd(x7));  // 03 13 23 33 43 53 63 73

    // 04 14 24 34 05 15 25 35 06 16 26 36 07 17 27 37
    x4 = _mm_unpackhi_epi16(x0, x1);
    // 44 54 64 74 45 55 65 75 46 56 66 76 47 57 67 77
    x5 = _mm_unpackhi_epi16(x2, x3);
    // 04 14 24 34 44 54 64 74 05 15 25 35 45 55 65 75
    x6 = _mm_unpacklo_epi32(x4, x5);
    _mm_storel_pd((double *)(out + 4 * out_p),
                  _mm_castsi128_pd(x6));  // 04 14 24 34 44 54 64 74
    _mm_storeh_pd((double *)(out + 5 * out_p),
                  _mm_castsi128_pd(x6));  // 05 15 25 35 45 55 65 75
    // 06 16 26 36 46 56 66 76 07 17 27 37 47 57 67 77
    x7 = _mm_unpackhi_epi32(x4, x5);

    _mm_storel_pd((double *)(out + 6 * out_p),
                  _mm_castsi128_pd(x7));  // 06 16 26 36 46 56 66 76
    _mm_storeh_pd((double *)(out + 7 * out_p),
                  _mm_castsi128_pd(x7));  // 07 17 27 37 47 57 67 77
  } while (++idx8x8 < num_8x8_to_transpose);
}

void aom_lpf_vertical_4_dual_sse2(uint8_t *s, int p, const uint8_t *blimit0,
                                  const uint8_t *limit0, const uint8_t *thresh0,
                                  const uint8_t *blimit1, const uint8_t *limit1,
                                  const uint8_t *thresh1) {
  DECLARE_ALIGNED(16, unsigned char, t_dst[16 * 8]);
  // Transpose 8x16
  transpose8x16(s - 4, s - 4 + p * 8, p, t_dst, 16);

  // Loop filtering
  aom_lpf_horizontal_4_dual_sse2(t_dst + 4 * 16, 16, blimit0, limit0, thresh0,
                                 blimit1, limit1, thresh1);
  transpose16x4(s - 2, p, t_dst + 16 * 2, 16);
}

void aom_lpf_vertical_6_sse2(unsigned char *s, int p,
                             const unsigned char *blimit,
                             const unsigned char *limit,
                             const unsigned char *thresh) {
  __m128i d0d1, d2d3, d4d5;
  __m128i d1, d3, d5;

  __m128i p2, p1, p0, q0, q1, q2;
  __m128i p1p0, q1q0;
  DECLARE_ALIGNED(16, unsigned char, temp_dst[16]);

  p2 = _mm_loadl_epi64((__m128i *)((s - 3) + 0 * p));
  p1 = _mm_loadl_epi64((__m128i *)((s - 3) + 1 * p));
  p0 = _mm_loadl_epi64((__m128i *)((s - 3) + 2 * p));
  q0 = _mm_loadl_epi64((__m128i *)((s - 3) + 3 * p));
  q1 = _mm_loadl_epi64((__m128i *)((s - 3) + 4 * p));
  q2 = _mm_loadl_epi64((__m128i *)((s - 3) + 5 * p));

  transpose6x6_sse2(&p2, &p1, &p0, &q0, &q1, &q2, &d0d1, &d2d3, &d4d5);

  d1 = _mm_srli_si128(d0d1, 8);
  d3 = _mm_srli_si128(d2d3, 8);
  d5 = _mm_srli_si128(d4d5, 8);

  // Loop filtering
  lpf_internal_6_sse2(&d0d1, &d5, &d1, &d4d5, &d2d3, &d3, &q1q0, &p1p0, blimit,
                      limit, thresh);

  p0 = _mm_srli_si128(p1p0, 8);
  q0 = _mm_srli_si128(q1q0, 8);

  transpose6x6_sse2(&d0d1, &p0, &p1p0, &q1q0, &q0, &d5, &d0d1, &d2d3, &d4d5);

  _mm_store_si128((__m128i *)(temp_dst), d0d1);
  memcpy((s - 3) + 0 * p, temp_dst, 6);
  memcpy((s - 3) + 1 * p, temp_dst + 8, 6);
  _mm_store_si128((__m128i *)(temp_dst), d2d3);
  memcpy((s - 3) + 2 * p, temp_dst, 6);
  memcpy((s - 3) + 3 * p, temp_dst + 8, 6);
}

void aom_lpf_vertical_8_sse2(unsigned char *s, int p,
                             const unsigned char *blimit,
                             const unsigned char *limit,
                             const unsigned char *thresh) {
  DECLARE_ALIGNED(8, unsigned char, t_dst[8 * 8]);
  unsigned char *src[1];
  unsigned char *dst[1];
  // Transpose 8x8
  src[0] = s - 4;
  dst[0] = t_dst;
  transpose8x8(src, p, dst, 8, 1);
  // Loop filtering
  aom_lpf_horizontal_8_sse2(t_dst + 4 * 8, 8, blimit, limit, thresh);
  src[0] = t_dst;
  dst[0] = s - 4;
  // Transpose back
  transpose8x8(src, 8, dst, p, 1);
}

void aom_lpf_vertical_8_dual_sse2(uint8_t *s, int p, const uint8_t *blimit0,
                                  const uint8_t *limit0, const uint8_t *thresh0,
                                  const uint8_t *blimit1, const uint8_t *limit1,
                                  const uint8_t *thresh1) {
  DECLARE_ALIGNED(16, unsigned char, t_dst[16 * 8]);
  unsigned char *src[2];
  unsigned char *dst[2];
  // Transpose 8x16
  transpose8x16(s - 4, s - 4 + p * 8, p, t_dst, 16);
  // Loop filtering
  aom_lpf_horizontal_8_dual_sse2(t_dst + 4 * 16, 16, blimit0, limit0, thresh0,
                                 blimit1, limit1, thresh1);
  src[0] = t_dst;
  src[1] = t_dst + 8;
  dst[0] = s - 4;
  dst[1] = s - 4 + p * 8;
  // Transpose back
  transpose8x8(src, 16, dst, p, 2);
}
void aom_lpf_vertical_14_sse2(unsigned char *s, int p,
                              const unsigned char *blimit,
                              const unsigned char *limit,
                              const unsigned char *thresh) {
  DECLARE_ALIGNED(8, unsigned char, t_dst[8 * 16]);
  unsigned char *src[2];
  unsigned char *dst[2];
  src[0] = s - 8;
  src[1] = s;
  dst[0] = t_dst;
  dst[1] = t_dst + 8 * 8;
  // Transpose 16x8
  transpose8x8(src, p, dst, 8, 2);
  // Loop filtering
  aom_lpf_horizontal_14_sse2(t_dst + 8 * 8, 8, blimit, limit, thresh);
  src[0] = t_dst;
  src[1] = t_dst + 8 * 8;
  dst[0] = s - 8;
  dst[1] = s;
  // Transpose back
  transpose8x8(src, 8, dst, p, 2);
}

void aom_lpf_vertical_14_dual_sse2(unsigned char *s, int p,
                                   const uint8_t *blimit, const uint8_t *limit,
                                   const uint8_t *thresh) {
  DECLARE_ALIGNED(16, unsigned char, t_dst[256]);
  // Transpose 16x16
  transpose8x16(s - 8, s - 8 + 8 * p, p, t_dst, 16);
  transpose8x16(s, s + 8 * p, p, t_dst + 8 * 16, 16);
  // Loop filtering
  aom_lpf_horizontal_14_dual_sse2(t_dst + 8 * 16, 16, blimit, limit, thresh);
  // Transpose back
  transpose8x16(t_dst, t_dst + 8 * 16, 16, s - 8, p);
  transpose8x16(t_dst + 8, t_dst + 8 + 8 * 16, 16, s - 8 + 8 * p, p);
}