text: /*
   * 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/lpf_common_sse2.h"
  #include "aom_ports/mem.h"
  #include "aom_ports/emmintrin_compat.h"
  
  static INLINE __m128i signed_char_clamp_bd_sse2(__m128i value, int bd) {
    __m128i ubounded;
    __m128i lbounded;
    __m128i retval;
  
    const __m128i zero = _mm_set1_epi16(0);
    const __m128i one = _mm_set1_epi16(1);
    __m128i t80, max, min;
  
    if (bd == 8) {
      t80 = _mm_set1_epi16(0x80);
      max = _mm_subs_epi16(_mm_subs_epi16(_mm_slli_epi16(one, 8), one), t80);
    } else if (bd == 10) {
      t80 = _mm_set1_epi16(0x200);
      max = _mm_subs_epi16(_mm_subs_epi16(_mm_slli_epi16(one, 10), one), t80);
    } else {  // bd == 12
      t80 = _mm_set1_epi16(0x800);
      max = _mm_subs_epi16(_mm_subs_epi16(_mm_slli_epi16(one, 12), one), t80);
    }
  
    min = _mm_subs_epi16(zero, t80);
  
    ubounded = _mm_cmpgt_epi16(value, max);
    lbounded = _mm_cmplt_epi16(value, min);
    retval = _mm_andnot_si128(_mm_or_si128(ubounded, lbounded), value);
    ubounded = _mm_and_si128(ubounded, max);
    lbounded = _mm_and_si128(lbounded, min);
    retval = _mm_or_si128(retval, ubounded);
    retval = _mm_or_si128(retval, lbounded);
    return retval;
  }
  
  // TODO(debargha, peter): Break up large functions into smaller ones
  // in this file.
  void aom_highbd_lpf_horizontal_edge_8_sse2(uint16_t *s, int p,
                                             const uint8_t *_blimit,
                                             const uint8_t *_limit,
                                             const uint8_t *_thresh, int bd) {
    const __m128i zero = _mm_set1_epi16(0);
    const __m128i one = _mm_set1_epi16(1);
    __m128i blimit, limit, thresh;
    __m128i q7, p7, q6, p6, q5, p5, q4, p4, q3, p3, q2, p2, q1, p1, q0, p0;
    __m128i mask, hev, flat, flat2, abs_p1p0, abs_q1q0;
    __m128i ps1, qs1, ps0, qs0;
    __m128i abs_p0q0, abs_p1q1, ffff, work;
    __m128i filt, work_a, filter1, filter2;
    __m128i flat2_q6, flat2_p6, flat2_q5, flat2_p5, flat2_q4, flat2_p4;
    __m128i flat2_q3, flat2_p3, flat2_q2, flat2_p2, flat2_q1, flat2_p1;
    __m128i flat2_q0, flat2_p0;
    __m128i flat_q2, flat_p2, flat_q1, flat_p1, flat_q0, flat_p0;
    __m128i pixelFilter_p, pixelFilter_q;
    __m128i pixetFilter_p2p1p0, pixetFilter_q2q1q0;
    __m128i sum_p7, sum_q7, sum_p3, sum_q3;
    __m128i t4, t3, t80, t1;
    __m128i eight, four;
  
    if (bd == 8) {
      blimit = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero);
      limit = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero);
      thresh = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero);
    } else if (bd == 10) {
      blimit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero), 2);
      limit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero), 2);
      thresh = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero), 2);
    } else {  // bd == 12
      blimit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero), 4);
      limit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero), 4);
      thresh = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero), 4);
    }
  
    q4 = _mm_load_si128((__m128i *)(s + 4 * p));
    p4 = _mm_load_si128((__m128i *)(s - 5 * p));
    q3 = _mm_load_si128((__m128i *)(s + 3 * p));
    p3 = _mm_load_si128((__m128i *)(s - 4 * p));
    q2 = _mm_load_si128((__m128i *)(s + 2 * p));
    p2 = _mm_load_si128((__m128i *)(s - 3 * p));
    q1 = _mm_load_si128((__m128i *)(s + 1 * p));
    p1 = _mm_load_si128((__m128i *)(s - 2 * p));
    q0 = _mm_load_si128((__m128i *)(s + 0 * p));
    p0 = _mm_load_si128((__m128i *)(s - 1 * p));
  
    //  highbd_filter_mask
    abs_p1p0 = _mm_or_si128(_mm_subs_epu16(p1, p0), _mm_subs_epu16(p0, p1));
    abs_q1q0 = _mm_or_si128(_mm_subs_epu16(q1, q0), _mm_subs_epu16(q0, q1));
  
    ffff = _mm_cmpeq_epi16(abs_p1p0, abs_p1p0);
  
    abs_p0q0 = _mm_or_si128(_mm_subs_epu16(p0, q0), _mm_subs_epu16(q0, p0));
    abs_p1q1 = _mm_or_si128(_mm_subs_epu16(p1, q1), _mm_subs_epu16(q1, p1));
  
    //  highbd_hev_mask (in C code this is actually called from highbd_filter4)
    flat = _mm_max_epi16(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu16(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi16(hev, zero), ffff);
  
    abs_p0q0 = _mm_adds_epu16(abs_p0q0, abs_p0q0);  // abs(p0 - q0) * 2
    abs_p1q1 = _mm_srli_epi16(abs_p1q1, 1);         // abs(p1 - q1) / 2
    mask = _mm_subs_epu16(_mm_adds_epu16(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi16(mask, zero), ffff);
    mask = _mm_and_si128(mask, _mm_adds_epu16(limit, one));
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p1, p0), _mm_subs_epu16(p0, p1)),
        _mm_or_si128(_mm_subs_epu16(q1, q0), _mm_subs_epu16(q0, q1)));
    mask = _mm_max_epi16(work, mask);
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p2, p1), _mm_subs_epu16(p1, p2)),
        _mm_or_si128(_mm_subs_epu16(q2, q1), _mm_subs_epu16(q1, q2)));
    mask = _mm_max_epi16(work, mask);
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p3, p2), _mm_subs_epu16(p2, p3)),
        _mm_or_si128(_mm_subs_epu16(q3, q2), _mm_subs_epu16(q2, q3)));
    mask = _mm_max_epi16(work, mask);
  
    mask = _mm_subs_epu16(mask, limit);
    mask = _mm_cmpeq_epi16(mask, zero);  // return ~mask
  
    // lp filter
    // highbd_filter4
    t4 = _mm_set1_epi16(4);
    t3 = _mm_set1_epi16(3);
    if (bd == 8)
      t80 = _mm_set1_epi16(0x80);
    else if (bd == 10)
      t80 = _mm_set1_epi16(0x200);
    else  // bd == 12
      t80 = _mm_set1_epi16(0x800);
  
    t1 = _mm_set1_epi16(0x1);
  
    ps1 = _mm_subs_epi16(p1, t80);
    qs1 = _mm_subs_epi16(q1, t80);
    ps0 = _mm_subs_epi16(p0, t80);
    qs0 = _mm_subs_epi16(q0, t80);
  
    filt = _mm_and_si128(signed_char_clamp_bd_sse2(_mm_subs_epi16(ps1, qs1), bd),
                         hev);
    work_a = _mm_subs_epi16(qs0, ps0);
    filt = _mm_adds_epi16(filt, work_a);
    filt = _mm_adds_epi16(filt, work_a);
    filt = signed_char_clamp_bd_sse2(_mm_adds_epi16(filt, work_a), bd);
    filt = _mm_and_si128(filt, mask);
    filter1 = signed_char_clamp_bd_sse2(_mm_adds_epi16(filt, t4), bd);
    filter2 = signed_char_clamp_bd_sse2(_mm_adds_epi16(filt, t3), bd);
  
    // Filter1 >> 3
    filter1 = _mm_srai_epi16(filter1, 0x3);
    filter2 = _mm_srai_epi16(filter2, 0x3);
  
    qs0 = _mm_adds_epi16(
        signed_char_clamp_bd_sse2(_mm_subs_epi16(qs0, filter1), bd), t80);
    ps0 = _mm_adds_epi16(
        signed_char_clamp_bd_sse2(_mm_adds_epi16(ps0, filter2), bd), t80);
    filt = _mm_adds_epi16(filter1, t1);
    filt = _mm_srai_epi16(filt, 1);
    filt = _mm_andnot_si128(hev, filt);
    qs1 = _mm_adds_epi16(signed_char_clamp_bd_sse2(_mm_subs_epi16(qs1, filt), bd),
                         t80);
    ps1 = _mm_adds_epi16(signed_char_clamp_bd_sse2(_mm_adds_epi16(ps1, filt), bd),
                         t80);
  
    // end highbd_filter4
    // loopfilter done
  
    // highbd_flat_mask4
    flat = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p2, p0), _mm_subs_epu16(p0, p2)),
        _mm_or_si128(_mm_subs_epu16(p3, p0), _mm_subs_epu16(p0, p3)));
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(q2, q0), _mm_subs_epu16(q0, q2)),
        _mm_or_si128(_mm_subs_epu16(q3, q0), _mm_subs_epu16(q0, q3)));
    flat = _mm_max_epi16(work, flat);
    work = _mm_max_epi16(abs_p1p0, abs_q1q0);
    flat = _mm_max_epi16(work, flat);
  
    if (bd == 8)
      flat = _mm_subs_epu16(flat, one);
    else if (bd == 10)
      flat = _mm_subs_epu16(flat, _mm_slli_epi16(one, 2));
    else  // bd == 12
      flat = _mm_subs_epu16(flat, _mm_slli_epi16(one, 4));
  
    flat = _mm_cmpeq_epi16(flat, zero);
    // end flat_mask4
  
    // flat & mask = flat && mask (as used in filter8)
    // (because, in both vars, each block of 16 either all 1s or all 0s)
    flat = _mm_and_si128(flat, mask);
  
    p5 = _mm_load_si128((__m128i *)(s - 6 * p));
    q5 = _mm_load_si128((__m128i *)(s + 5 * p));
    p6 = _mm_load_si128((__m128i *)(s - 7 * p));
    q6 = _mm_load_si128((__m128i *)(s + 6 * p));
    p7 = _mm_load_si128((__m128i *)(s - 8 * p));
    q7 = _mm_load_si128((__m128i *)(s + 7 * p));
  
    // highbd_flat_mask5 (arguments passed in are p0, q0, p4-p7, q4-q7
    // but referred to as p0-p4 & q0-q4 in fn)
    flat2 = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p4, p0), _mm_subs_epu16(p0, p4)),
        _mm_or_si128(_mm_subs_epu16(q4, q0), _mm_subs_epu16(q0, q4)));
  
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p5, p0), _mm_subs_epu16(p0, p5)),
        _mm_or_si128(_mm_subs_epu16(q5, q0), _mm_subs_epu16(q0, q5)));
    flat2 = _mm_max_epi16(work, flat2);
  
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p6, p0), _mm_subs_epu16(p0, p6)),
        _mm_or_si128(_mm_subs_epu16(q6, q0), _mm_subs_epu16(q0, q6)));
    flat2 = _mm_max_epi16(work, flat2);
  
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p7, p0), _mm_subs_epu16(p0, p7)),
        _mm_or_si128(_mm_subs_epu16(q7, q0), _mm_subs_epu16(q0, q7)));
    flat2 = _mm_max_epi16(work, flat2);
  
    if (bd == 8)
      flat2 = _mm_subs_epu16(flat2, one);
    else if (bd == 10)
      flat2 = _mm_subs_epu16(flat2, _mm_slli_epi16(one, 2));
    else  // bd == 12
      flat2 = _mm_subs_epu16(flat2, _mm_slli_epi16(one, 4));
  
    flat2 = _mm_cmpeq_epi16(flat2, zero);
    flat2 = _mm_and_si128(flat2, flat);  // flat2 & flat & mask
    // end highbd_flat_mask5
  
    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    // flat and wide flat calculations
    eight = _mm_set1_epi16(8);
    four = _mm_set1_epi16(4);
  
    pixelFilter_p = _mm_add_epi16(_mm_add_epi16(p6, p5), _mm_add_epi16(p4, p3));
    pixelFilter_q = _mm_add_epi16(_mm_add_epi16(q6, q5), _mm_add_epi16(q4, q3));
  
    pixetFilter_p2p1p0 = _mm_add_epi16(p0, _mm_add_epi16(p2, p1));
    pixelFilter_p = _mm_add_epi16(pixelFilter_p, pixetFilter_p2p1p0);
  
    pixetFilter_q2q1q0 = _mm_add_epi16(q0, _mm_add_epi16(q2, q1));
    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));
    flat2_p0 =
        _mm_srli_epi16(_mm_add_epi16(pixelFilter_p, _mm_add_epi16(p7, p0)), 4);
    flat2_q0 =
        _mm_srli_epi16(_mm_add_epi16(pixelFilter_p, _mm_add_epi16(q7, q0)), 4);
    flat_p0 = _mm_srli_epi16(
        _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(p3, p0)), 3);
    flat_q0 = _mm_srli_epi16(
        _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(q3, q0)), 3);
  
    sum_p7 = _mm_add_epi16(p7, p7);
    sum_q7 = _mm_add_epi16(q7, q7);
    sum_p3 = _mm_add_epi16(p3, p3);
    sum_q3 = _mm_add_epi16(q3, q3);
  
    pixelFilter_q = _mm_sub_epi16(pixelFilter_p, p6);
    pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q6);
    flat2_p1 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p1)), 4);
    flat2_q1 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q1)), 4);
  
    pixetFilter_q2q1q0 = _mm_sub_epi16(pixetFilter_p2p1p0, p2);
    pixetFilter_p2p1p0 = _mm_sub_epi16(pixetFilter_p2p1p0, q2);
    flat_p1 = _mm_srli_epi16(
        _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(sum_p3, p1)), 3);
    flat_q1 = _mm_srli_epi16(
        _mm_add_epi16(pixetFilter_q2q1q0, _mm_add_epi16(sum_q3, q1)), 3);
  
    sum_p7 = _mm_add_epi16(sum_p7, p7);
    sum_q7 = _mm_add_epi16(sum_q7, q7);
    sum_p3 = _mm_add_epi16(sum_p3, p3);
    sum_q3 = _mm_add_epi16(sum_q3, q3);
  
    pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q5);
    pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p5);
    flat2_p2 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p2)), 4);
    flat2_q2 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q2)), 4);
  
    pixetFilter_p2p1p0 = _mm_sub_epi16(pixetFilter_p2p1p0, q1);
    pixetFilter_q2q1q0 = _mm_sub_epi16(pixetFilter_q2q1q0, p1);
    flat_p2 = _mm_srli_epi16(
        _mm_add_epi16(pixetFilter_p2p1p0, _mm_add_epi16(sum_p3, p2)), 3);
    flat_q2 = _mm_srli_epi16(
        _mm_add_epi16(pixetFilter_q2q1q0, _mm_add_epi16(sum_q3, q2)), 3);
  
    sum_p7 = _mm_add_epi16(sum_p7, p7);
    sum_q7 = _mm_add_epi16(sum_q7, q7);
    pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q4);
    pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p4);
    flat2_p3 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p3)), 4);
    flat2_q3 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q3)), 4);
  
    sum_p7 = _mm_add_epi16(sum_p7, p7);
    sum_q7 = _mm_add_epi16(sum_q7, q7);
    pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q3);
    pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p3);
    flat2_p4 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p4)), 4);
    flat2_q4 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q4)), 4);
  
    sum_p7 = _mm_add_epi16(sum_p7, p7);
    sum_q7 = _mm_add_epi16(sum_q7, q7);
    pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q2);
    pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p2);
    flat2_p5 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p5)), 4);
    flat2_q5 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q5)), 4);
  
    sum_p7 = _mm_add_epi16(sum_p7, p7);
    sum_q7 = _mm_add_epi16(sum_q7, q7);
    pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q1);
    pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p1);
    flat2_p6 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p6)), 4);
    flat2_q6 = _mm_srli_epi16(
        _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q6)), 4);
  
    //  wide flat
    //  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
    //  highbd_filter8
    p2 = _mm_andnot_si128(flat, p2);
    //  p2 remains unchanged if !(flat && mask)
    flat_p2 = _mm_and_si128(flat, flat_p2);
    //  when (flat && mask)
    p2 = _mm_or_si128(p2, flat_p2);  // full list of p2 values
    q2 = _mm_andnot_si128(flat, q2);
    flat_q2 = _mm_and_si128(flat, flat_q2);
    q2 = _mm_or_si128(q2, flat_q2);  // full list of q2 values
  
    ps1 = _mm_andnot_si128(flat, ps1);
    //  p1 takes the value assigned to in in filter4 if !(flat && mask)
    flat_p1 = _mm_and_si128(flat, flat_p1);
    //  when (flat && mask)
    p1 = _mm_or_si128(ps1, flat_p1);  // full list of p1 values
    qs1 = _mm_andnot_si128(flat, qs1);
    flat_q1 = _mm_and_si128(flat, flat_q1);
    q1 = _mm_or_si128(qs1, flat_q1);  // full list of q1 values
  
    ps0 = _mm_andnot_si128(flat, ps0);
    //  p0 takes the value assigned to in in filter4 if !(flat && mask)
    flat_p0 = _mm_and_si128(flat, flat_p0);
    //  when (flat && mask)
    p0 = _mm_or_si128(ps0, flat_p0);  // full list of p0 values
    qs0 = _mm_andnot_si128(flat, qs0);
    flat_q0 = _mm_and_si128(flat, flat_q0);
    q0 = _mm_or_si128(qs0, flat_q0);  // full list of q0 values
    // end highbd_filter8
  
    // highbd_filter16
    p6 = _mm_andnot_si128(flat2, p6);
    //  p6 remains unchanged if !(flat2 && flat && mask)
    flat2_p6 = _mm_and_si128(flat2, flat2_p6);
    //  get values for when (flat2 && flat && mask)
    p6 = _mm_or_si128(p6, flat2_p6);  // full list of p6 values
    q6 = _mm_andnot_si128(flat2, q6);
    //  q6 remains unchanged if !(flat2 && flat && mask)
    flat2_q6 = _mm_and_si128(flat2, flat2_q6);
    //  get values for when (flat2 && flat && mask)
    q6 = _mm_or_si128(q6, flat2_q6);  // full list of q6 values
    _mm_store_si128((__m128i *)(s - 7 * p), p6);
    _mm_store_si128((__m128i *)(s + 6 * p), q6);
  
    p5 = _mm_andnot_si128(flat2, p5);
    //  p5 remains unchanged if !(flat2 && flat && mask)
    flat2_p5 = _mm_and_si128(flat2, flat2_p5);
    //  get values for when (flat2 && flat && mask)
    p5 = _mm_or_si128(p5, flat2_p5);
    //  full list of p5 values
    q5 = _mm_andnot_si128(flat2, q5);
    //  q5 remains unchanged if !(flat2 && flat && mask)
    flat2_q5 = _mm_and_si128(flat2, flat2_q5);
    //  get values for when (flat2 && flat && mask)
    q5 = _mm_or_si128(q5, flat2_q5);
    //  full list of q5 values
    _mm_store_si128((__m128i *)(s - 6 * p), p5);
    _mm_store_si128((__m128i *)(s + 5 * p), q5);
  
    p4 = _mm_andnot_si128(flat2, p4);
    //  p4 remains unchanged if !(flat2 && flat && mask)
    flat2_p4 = _mm_and_si128(flat2, flat2_p4);
    //  get values for when (flat2 && flat && mask)
    p4 = _mm_or_si128(p4, flat2_p4);  // full list of p4 values
    q4 = _mm_andnot_si128(flat2, q4);
    //  q4 remains unchanged if !(flat2 && flat && mask)
    flat2_q4 = _mm_and_si128(flat2, flat2_q4);
    //  get values for when (flat2 && flat && mask)
    q4 = _mm_or_si128(q4, flat2_q4);  // full list of q4 values
    _mm_store_si128((__m128i *)(s - 5 * p), p4);
    _mm_store_si128((__m128i *)(s + 4 * p), q4);
  
    p3 = _mm_andnot_si128(flat2, p3);
    //  p3 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_p3 = _mm_and_si128(flat2, flat2_p3);
    //  get values for when (flat2 && flat && mask)
    p3 = _mm_or_si128(p3, flat2_p3);  // full list of p3 values
    q3 = _mm_andnot_si128(flat2, q3);
    //  q3 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_q3 = _mm_and_si128(flat2, flat2_q3);
    //  get values for when (flat2 && flat && mask)
    q3 = _mm_or_si128(q3, flat2_q3);  // full list of q3 values
    _mm_store_si128((__m128i *)(s - 4 * p), p3);
    _mm_store_si128((__m128i *)(s + 3 * p), q3);
  
    p2 = _mm_andnot_si128(flat2, p2);
    //  p2 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_p2 = _mm_and_si128(flat2, flat2_p2);
    //  get values for when (flat2 && flat && mask)
    p2 = _mm_or_si128(p2, flat2_p2);
    //  full list of p2 values
    q2 = _mm_andnot_si128(flat2, q2);
    //  q2 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_q2 = _mm_and_si128(flat2, flat2_q2);
    //  get values for when (flat2 && flat && mask)
    q2 = _mm_or_si128(q2, flat2_q2);  // full list of q2 values
    _mm_store_si128((__m128i *)(s - 3 * p), p2);
    _mm_store_si128((__m128i *)(s + 2 * p), q2);
  
    p1 = _mm_andnot_si128(flat2, p1);
    //  p1 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_p1 = _mm_and_si128(flat2, flat2_p1);
    //  get values for when (flat2 && flat && mask)
    p1 = _mm_or_si128(p1, flat2_p1);  // full list of p1 values
    q1 = _mm_andnot_si128(flat2, q1);
    //  q1 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_q1 = _mm_and_si128(flat2, flat2_q1);
    //  get values for when (flat2 && flat && mask)
    q1 = _mm_or_si128(q1, flat2_q1);  // full list of q1 values
    _mm_store_si128((__m128i *)(s - 2 * p), p1);
    _mm_store_si128((__m128i *)(s + 1 * p), q1);
  
    p0 = _mm_andnot_si128(flat2, p0);
    //  p0 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_p0 = _mm_and_si128(flat2, flat2_p0);
    //  get values for when (flat2 && flat && mask)
    p0 = _mm_or_si128(p0, flat2_p0);  // full list of p0 values
    q0 = _mm_andnot_si128(flat2, q0);
    //  q0 takes value from highbd_filter8 if !(flat2 && flat && mask)
    flat2_q0 = _mm_and_si128(flat2, flat2_q0);
    //  get values for when (flat2 && flat && mask)
    q0 = _mm_or_si128(q0, flat2_q0);  // full list of q0 values
    _mm_store_si128((__m128i *)(s - 1 * p), p0);
    _mm_store_si128((__m128i *)(s - 0 * p), q0);
  }
  
  void aom_highbd_lpf_horizontal_edge_16_sse2(uint16_t *s, int p,
                                              const uint8_t *_blimit,
                                              const uint8_t *_limit,
                                              const uint8_t *_thresh, int bd) {
    aom_highbd_lpf_horizontal_edge_8_sse2(s, p, _blimit, _limit, _thresh, bd);
    aom_highbd_lpf_horizontal_edge_8_sse2(s + 8, p, _blimit, _limit, _thresh, bd);
  }
  
  void aom_highbd_lpf_horizontal_8_sse2(uint16_t *s, int p,
                                        const uint8_t *_blimit,
                                        const uint8_t *_limit,
                                        const uint8_t *_thresh, int bd) {
    DECLARE_ALIGNED(16, uint16_t, flat_op2[16]);
    DECLARE_ALIGNED(16, uint16_t, flat_op1[16]);
    DECLARE_ALIGNED(16, uint16_t, flat_op0[16]);
    DECLARE_ALIGNED(16, uint16_t, flat_oq2[16]);
    DECLARE_ALIGNED(16, uint16_t, flat_oq1[16]);
    DECLARE_ALIGNED(16, uint16_t, flat_oq0[16]);
    const __m128i zero = _mm_set1_epi16(0);
    __m128i blimit, limit, thresh;
    __m128i mask, hev, flat;
    __m128i p3 = _mm_load_si128((__m128i *)(s - 4 * p));
    __m128i q3 = _mm_load_si128((__m128i *)(s + 3 * p));
    __m128i p2 = _mm_load_si128((__m128i *)(s - 3 * p));
    __m128i q2 = _mm_load_si128((__m128i *)(s + 2 * p));
    __m128i p1 = _mm_load_si128((__m128i *)(s - 2 * p));
    __m128i q1 = _mm_load_si128((__m128i *)(s + 1 * p));
    __m128i p0 = _mm_load_si128((__m128i *)(s - 1 * p));
    __m128i q0 = _mm_load_si128((__m128i *)(s + 0 * p));
    const __m128i one = _mm_set1_epi16(1);
    const __m128i ffff = _mm_cmpeq_epi16(one, one);
    __m128i abs_p1q1, abs_p0q0, abs_q1q0, abs_p1p0, work;
    const __m128i four = _mm_set1_epi16(4);
    __m128i workp_a, workp_b, workp_shft;
  
    const __m128i t4 = _mm_set1_epi16(4);
    const __m128i t3 = _mm_set1_epi16(3);
    __m128i t80;
    const __m128i t1 = _mm_set1_epi16(0x1);
    __m128i ps1, ps0, qs0, qs1;
    __m128i filt;
    __m128i work_a;
    __m128i filter1, filter2;
  
    if (bd == 8) {
      blimit = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero);
      limit = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero);
      thresh = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero);
      t80 = _mm_set1_epi16(0x80);
    } else if (bd == 10) {
      blimit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero), 2);
      limit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero), 2);
      thresh = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero), 2);
      t80 = _mm_set1_epi16(0x200);
    } else {  // bd == 12
      blimit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero), 4);
      limit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero), 4);
      thresh = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero), 4);
      t80 = _mm_set1_epi16(0x800);
    }
  
    ps1 = _mm_subs_epi16(p1, t80);
    ps0 = _mm_subs_epi16(p0, t80);
    qs0 = _mm_subs_epi16(q0, t80);
    qs1 = _mm_subs_epi16(q1, t80);
  
    // filter_mask and hev_mask
    abs_p1p0 = _mm_or_si128(_mm_subs_epu16(p1, p0), _mm_subs_epu16(p0, p1));
    abs_q1q0 = _mm_or_si128(_mm_subs_epu16(q1, q0), _mm_subs_epu16(q0, q1));
  
    abs_p0q0 = _mm_or_si128(_mm_subs_epu16(p0, q0), _mm_subs_epu16(q0, p0));
    abs_p1q1 = _mm_or_si128(_mm_subs_epu16(p1, q1), _mm_subs_epu16(q1, p1));
    flat = _mm_max_epi16(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu16(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi16(hev, zero), ffff);
  
    abs_p0q0 = _mm_adds_epu16(abs_p0q0, abs_p0q0);
    abs_p1q1 = _mm_srli_epi16(abs_p1q1, 1);
    mask = _mm_subs_epu16(_mm_adds_epu16(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi16(mask, zero), ffff);
    // mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;
    // So taking maximums continues to work:
    mask = _mm_and_si128(mask, _mm_adds_epu16(limit, one));
    mask = _mm_max_epi16(abs_p1p0, mask);
    // mask |= (abs(p1 - p0) > limit) * -1;
    mask = _mm_max_epi16(abs_q1q0, mask);
    // mask |= (abs(q1 - q0) > limit) * -1;
  
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p2, p1), _mm_subs_epu16(p1, p2)),
        _mm_or_si128(_mm_subs_epu16(q2, q1), _mm_subs_epu16(q1, q2)));
    mask = _mm_max_epi16(work, mask);
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p3, p2), _mm_subs_epu16(p2, p3)),
        _mm_or_si128(_mm_subs_epu16(q3, q2), _mm_subs_epu16(q2, q3)));
    mask = _mm_max_epi16(work, mask);
    mask = _mm_subs_epu16(mask, limit);
    mask = _mm_cmpeq_epi16(mask, zero);
  
    // flat_mask4
    flat = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p2, p0), _mm_subs_epu16(p0, p2)),
        _mm_or_si128(_mm_subs_epu16(q2, q0), _mm_subs_epu16(q0, q2)));
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p3, p0), _mm_subs_epu16(p0, p3)),
        _mm_or_si128(_mm_subs_epu16(q3, q0), _mm_subs_epu16(q0, q3)));
    flat = _mm_max_epi16(work, flat);
    flat = _mm_max_epi16(abs_p1p0, flat);
    flat = _mm_max_epi16(abs_q1q0, flat);
  
    if (bd == 8)
      flat = _mm_subs_epu16(flat, one);
    else if (bd == 10)
      flat = _mm_subs_epu16(flat, _mm_slli_epi16(one, 2));
    else  // bd == 12
      flat = _mm_subs_epu16(flat, _mm_slli_epi16(one, 4));
  
    flat = _mm_cmpeq_epi16(flat, zero);
    flat = _mm_and_si128(flat, mask);  // flat & mask
  
    // Added before shift for rounding part of ROUND_POWER_OF_TWO
  
    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_store_si128((__m128i *)&flat_op2[0], 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_store_si128((__m128i *)&flat_op1[0], 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_store_si128((__m128i *)&flat_op0[0], 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_store_si128((__m128i *)&flat_oq0[0], 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_store_si128((__m128i *)&flat_oq1[0], 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_store_si128((__m128i *)&flat_oq2[0], workp_shft);
  
    // lp filter
    filt = signed_char_clamp_bd_sse2(_mm_subs_epi16(ps1, qs1), bd);
    filt = _mm_and_si128(filt, hev);
    work_a = _mm_subs_epi16(qs0, ps0);
    filt = _mm_adds_epi16(filt, work_a);
    filt = _mm_adds_epi16(filt, work_a);
    filt = _mm_adds_epi16(filt, work_a);
    // (aom_filter + 3 * (qs0 - ps0)) & mask
    filt = signed_char_clamp_bd_sse2(filt, bd);
    filt = _mm_and_si128(filt, mask);
  
    filter1 = _mm_adds_epi16(filt, t4);
    filter2 = _mm_adds_epi16(filt, t3);
  
    // Filter1 >> 3
    filter1 = signed_char_clamp_bd_sse2(filter1, bd);
    filter1 = _mm_srai_epi16(filter1, 3);
  
    // Filter2 >> 3
    filter2 = signed_char_clamp_bd_sse2(filter2, bd);
    filter2 = _mm_srai_epi16(filter2, 3);
  
    // filt >> 1
    filt = _mm_adds_epi16(filter1, t1);
    filt = _mm_srai_epi16(filt, 1);
    // filter = ROUND_POWER_OF_TWO(filter1, 1) & ~hev;
    filt = _mm_andnot_si128(hev, filt);
  
    work_a = signed_char_clamp_bd_sse2(_mm_subs_epi16(qs0, filter1), bd);
    work_a = _mm_adds_epi16(work_a, 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 = signed_char_clamp_bd_sse2(_mm_subs_epi16(qs1, filt), bd);
    work_a = _mm_adds_epi16(work_a, 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 = signed_char_clamp_bd_sse2(_mm_adds_epi16(ps0, filter2), bd);
    work_a = _mm_adds_epi16(work_a, 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 = signed_char_clamp_bd_sse2(_mm_adds_epi16(ps1, filt), bd);
    work_a = _mm_adds_epi16(work_a, 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_store_si128((__m128i *)(s - 3 * p), p2);
    _mm_store_si128((__m128i *)(s - 2 * p), p1);
    _mm_store_si128((__m128i *)(s - 1 * p), p0);
    _mm_store_si128((__m128i *)(s + 0 * p), q0);
    _mm_store_si128((__m128i *)(s + 1 * p), q1);
    _mm_store_si128((__m128i *)(s + 2 * p), q2);
  }
  
  void aom_highbd_lpf_horizontal_8_dual_sse2(
      uint16_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, int bd) {
    aom_highbd_lpf_horizontal_8_sse2(s, p, _blimit0, _limit0, _thresh0, bd);
    aom_highbd_lpf_horizontal_8_sse2(s + 8, p, _blimit1, _limit1, _thresh1, bd);
  }
  
  void aom_highbd_lpf_horizontal_4_sse2(uint16_t *s, int p,
                                        const uint8_t *_blimit,
                                        const uint8_t *_limit,
                                        const uint8_t *_thresh, int bd) {
    const __m128i zero = _mm_set1_epi16(0);
    __m128i blimit, limit, thresh;
    __m128i mask, hev, flat;
    __m128i p3 = _mm_loadu_si128((__m128i *)(s - 4 * p));
    __m128i p2 = _mm_loadu_si128((__m128i *)(s - 3 * p));
    __m128i p1 = _mm_loadu_si128((__m128i *)(s - 2 * p));
    __m128i p0 = _mm_loadu_si128((__m128i *)(s - 1 * p));
    __m128i q0 = _mm_loadu_si128((__m128i *)(s - 0 * p));
    __m128i q1 = _mm_loadu_si128((__m128i *)(s + 1 * p));
    __m128i q2 = _mm_loadu_si128((__m128i *)(s + 2 * p));
    __m128i q3 = _mm_loadu_si128((__m128i *)(s + 3 * p));
    const __m128i abs_p1p0 =
        _mm_or_si128(_mm_subs_epu16(p1, p0), _mm_subs_epu16(p0, p1));
    const __m128i abs_q1q0 =
        _mm_or_si128(_mm_subs_epu16(q1, q0), _mm_subs_epu16(q0, q1));
    const __m128i ffff = _mm_cmpeq_epi16(abs_p1p0, abs_p1p0);
    const __m128i one = _mm_set1_epi16(1);
    __m128i abs_p0q0 =
        _mm_or_si128(_mm_subs_epu16(p0, q0), _mm_subs_epu16(q0, p0));
    __m128i abs_p1q1 =
        _mm_or_si128(_mm_subs_epu16(p1, q1), _mm_subs_epu16(q1, p1));
    __m128i work;
    const __m128i t4 = _mm_set1_epi16(4);
    const __m128i t3 = _mm_set1_epi16(3);
    __m128i t80;
    __m128i tff80;
    __m128i tffe0;
    __m128i t1f;
    // equivalent to shifting 0x1f left by bitdepth - 8
    // and setting new bits to 1
    const __m128i t1 = _mm_set1_epi16(0x1);
    __m128i t7f;
    // equivalent to shifting 0x7f left by bitdepth - 8
    // and setting new bits to 1
    __m128i ps1, ps0, qs0, qs1;
    __m128i filt;
    __m128i work_a;
    __m128i filter1, filter2;
  
    if (bd == 8) {
      blimit = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero);
      limit = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero);
      thresh = _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero);
      t80 = _mm_set1_epi16(0x80);
      tff80 = _mm_set1_epi16(0xff80);
      tffe0 = _mm_set1_epi16(0xffe0);
      t1f = _mm_srli_epi16(_mm_set1_epi16(0x1fff), 8);
      t7f = _mm_srli_epi16(_mm_set1_epi16(0x7fff), 8);
    } else if (bd == 10) {
      blimit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero), 2);
      limit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero), 2);
      thresh = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero), 2);
      t80 = _mm_slli_epi16(_mm_set1_epi16(0x80), 2);
      tff80 = _mm_slli_epi16(_mm_set1_epi16(0xff80), 2);
      tffe0 = _mm_slli_epi16(_mm_set1_epi16(0xffe0), 2);
      t1f = _mm_srli_epi16(_mm_set1_epi16(0x1fff), 6);
      t7f = _mm_srli_epi16(_mm_set1_epi16(0x7fff), 6);
    } else {  // bd == 12
      blimit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_blimit), zero), 4);
      limit = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_limit), zero), 4);
      thresh = _mm_slli_epi16(
          _mm_unpacklo_epi8(_mm_load_si128((const __m128i *)_thresh), zero), 4);
      t80 = _mm_slli_epi16(_mm_set1_epi16(0x80), 4);
      tff80 = _mm_slli_epi16(_mm_set1_epi16(0xff80), 4);
      tffe0 = _mm_slli_epi16(_mm_set1_epi16(0xffe0), 4);
      t1f = _mm_srli_epi16(_mm_set1_epi16(0x1fff), 4);
      t7f = _mm_srli_epi16(_mm_set1_epi16(0x7fff), 4);
    }
  
    ps1 = _mm_subs_epi16(_mm_loadu_si128((__m128i *)(s - 2 * p)), t80);
    ps0 = _mm_subs_epi16(_mm_loadu_si128((__m128i *)(s - 1 * p)), t80);
    qs0 = _mm_subs_epi16(_mm_loadu_si128((__m128i *)(s + 0 * p)), t80);
    qs1 = _mm_subs_epi16(_mm_loadu_si128((__m128i *)(s + 1 * p)), t80);
  
    // filter_mask and hev_mask
    flat = _mm_max_epi16(abs_p1p0, abs_q1q0);
    hev = _mm_subs_epu16(flat, thresh);
    hev = _mm_xor_si128(_mm_cmpeq_epi16(hev, zero), ffff);
  
    abs_p0q0 = _mm_adds_epu16(abs_p0q0, abs_p0q0);
    abs_p1q1 = _mm_srli_epi16(abs_p1q1, 1);
    mask = _mm_subs_epu16(_mm_adds_epu16(abs_p0q0, abs_p1q1), blimit);
    mask = _mm_xor_si128(_mm_cmpeq_epi16(mask, zero), ffff);
    // mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;
    // So taking maximums continues to work:
    mask = _mm_and_si128(mask, _mm_adds_epu16(limit, one));
    mask = _mm_max_epi16(flat, mask);
    // mask |= (abs(p1 - p0) > limit) * -1;
    // mask |= (abs(q1 - q0) > limit) * -1;
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(p2, p1), _mm_subs_epu16(p1, p2)),
        _mm_or_si128(_mm_subs_epu16(p3, p2), _mm_subs_epu16(p2, p3)));
    mask = _mm_max_epi16(work, mask);
    work = _mm_max_epi16(
        _mm_or_si128(_mm_subs_epu16(q2, q1), _mm_subs_epu16(q1, q2)),
        _mm_or_si128(_mm_subs_epu16(q3, q2), _mm_subs_epu16(q2, q3)));
    mask = _mm_max_epi16(work, mask);
    mask = _mm_subs_epu16(mask, limit);
    mask = _mm_cmpeq_epi16(mask, zero);
  
    // filter4
    filt = signed_char_clamp_bd_sse2(_mm_subs_epi16(ps1, qs1), bd);
    filt = _mm_and_si128(filt, hev);
    work_a = _mm_subs_epi16(qs0, ps0);
    filt = _mm_adds_epi16(filt, work_a);
    filt = _mm_adds_epi16(filt, work_a);
    filt = signed_char_clamp_bd_sse2(_mm_adds_epi16(filt, work_a), bd);
  
    // (aom_filter + 3 * (qs0 - ps0)) & mask
    filt = _mm_and_si128(filt, mask);
  
    filter1 = signed_char_clamp_bd_sse2(_mm_adds_epi16(filt, t4), bd);
    filter2 = signed_char_clamp_bd_sse2(_mm_adds_epi16(filt, t3), bd);
  
    // Filter1 >> 3
    work_a = _mm_cmpgt_epi16(zero, filter1);  // get the values that are <0
    filter1 = _mm_srli_epi16(filter1, 3);
    work_a = _mm_and_si128(work_a, tffe0);    // sign bits for the values < 0
    filter1 = _mm_and_si128(filter1, t1f);    // clamp the range
    filter1 = _mm_or_si128(filter1, work_a);  // reinsert the sign bits
  
    // Filter2 >> 3
    work_a = _mm_cmpgt_epi16(zero, filter2);
    filter2 = _mm_srli_epi16(filter2, 3);
    work_a = _mm_and_si128(work_a, tffe0);
    filter2 = _mm_and_si128(filter2, t1f);
    filter2 = _mm_or_si128(filter2, work_a);
  
    // filt >> 1
    filt = _mm_adds_epi16(filter1, t1);
    work_a = _mm_cmpgt_epi16(zero, filt);
    filt = _mm_srli_epi16(filt, 1);
    work_a = _mm_and_si128(work_a, tff80);
    filt = _mm_and_si128(filt, t7f);
    filt = _mm_or_si128(filt, work_a);
  
    filt = _mm_andnot_si128(hev, filt);
  
    q0 = _mm_adds_epi16(
        signed_char_clamp_bd_sse2(_mm_subs_epi16(qs0, filter1), bd), t80);
    q1 = _mm_adds_epi16(signed_char_clamp_bd_sse2(_mm_subs_epi16(qs1, filt), bd),
                        t80);
    p0 = _mm_adds_epi16(
        signed_char_clamp_bd_sse2(_mm_adds_epi16(ps0, filter2), bd), t80);
    p1 = _mm_adds_epi16(signed_char_clamp_bd_sse2(_mm_adds_epi16(ps1, filt), bd),
                        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);
  }
  
  void aom_highbd_lpf_horizontal_4_dual_sse2(
      uint16_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, int bd) {
    aom_highbd_lpf_horizontal_4_sse2(s, p, _blimit0, _limit0, _thresh0, bd);
    aom_highbd_lpf_horizontal_4_sse2(s + 8, p, _blimit1, _limit1, _thresh1, bd);
  }
  
  void aom_highbd_lpf_vertical_4_sse2(uint16_t *s, int p, const uint8_t *blimit,
                                      const uint8_t *limit, const uint8_t *thresh,
                                      int bd) {
    DECLARE_ALIGNED(16, uint16_t, t_dst[8 * 8]);
    uint16_t *src[1];
    uint16_t *dst[1];
  
    // Transpose 8x8
    src[0] = s - 4;
    dst[0] = t_dst;
  
    highbd_transpose(src, p, dst, 8, 1);
  
    // Loop filtering
    aom_highbd_lpf_horizontal_4_sse2(t_dst + 4 * 8, 8, blimit, limit, thresh, bd);
  
    src[0] = t_dst;
    dst[0] = s - 4;
  
    // Transpose back
    highbd_transpose(src, 8, dst, p, 1);
  }
  
  void aom_highbd_lpf_vertical_4_dual_sse2(
      uint16_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, int bd) {
    DECLARE_ALIGNED(16, uint16_t, t_dst[16 * 8]);
    uint16_t *src[2];
    uint16_t *dst[2];
  
    // Transpose 8x16
    highbd_transpose8x16(s - 4, s - 4 + p * 8, p, t_dst, 16);
  
    // Loop filtering
    aom_highbd_lpf_horizontal_4_dual_sse2(t_dst + 4 * 16, 16, blimit0, limit0,
                                          thresh0, blimit1, limit1, thresh1, bd);
    src[0] = t_dst;
    src[1] = t_dst + 8;
    dst[0] = s - 4;
    dst[1] = s - 4 + p * 8;
  
    // Transpose back
    highbd_transpose(src, 16, dst, p, 2);
  }
  
  void aom_highbd_lpf_vertical_8_sse2(uint16_t *s, int p, const uint8_t *blimit,
                                      const uint8_t *limit, const uint8_t *thresh,
                                      int bd) {
    DECLARE_ALIGNED(16, uint16_t, t_dst[8 * 8]);
    uint16_t *src[1];
    uint16_t *dst[1];
  
    // Transpose 8x8
    src[0] = s - 4;
    dst[0] = t_dst;
  
    highbd_transpose(src, p, dst, 8, 1);
  
    // Loop filtering
    aom_highbd_lpf_horizontal_8_sse2(t_dst + 4 * 8, 8, blimit, limit, thresh, bd);
  
    src[0] = t_dst;
    dst[0] = s - 4;
  
    // Transpose back
    highbd_transpose(src, 8, dst, p, 1);
  }
  
  void aom_highbd_lpf_vertical_8_dual_sse2(
      uint16_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, int bd) {
    DECLARE_ALIGNED(16, uint16_t, t_dst[16 * 8]);
    uint16_t *src[2];
    uint16_t *dst[2];
  
    // Transpose 8x16
    highbd_transpose8x16(s - 4, s - 4 + p * 8, p, t_dst, 16);
  
    // Loop filtering
    aom_highbd_lpf_horizontal_8_dual_sse2(t_dst + 4 * 16, 16, blimit0, limit0,
                                          thresh0, blimit1, limit1, thresh1, bd);
    src[0] = t_dst;
    src[1] = t_dst + 8;
  
    dst[0] = s - 4;
    dst[1] = s - 4 + p * 8;
  
    // Transpose back
    highbd_transpose(src, 16, dst, p, 2);
  }
  
  void aom_highbd_lpf_vertical_16_sse2(uint16_t *s, int p, const uint8_t *blimit,
                                       const uint8_t *limit,
                                       const uint8_t *thresh, int bd) {
    DECLARE_ALIGNED(16, uint16_t, t_dst[8 * 16]);
    uint16_t *src[2];
    uint16_t *dst[2];
  
    src[0] = s - 8;
    src[1] = s;
    dst[0] = t_dst;
    dst[1] = t_dst + 8 * 8;
  
    // Transpose 16x8
    highbd_transpose(src, p, dst, 8, 2);
  
    // Loop filtering
    aom_highbd_lpf_horizontal_edge_8_sse2(t_dst + 8 * 8, 8, blimit, limit, thresh,
                                          bd);
    src[0] = t_dst;
    src[1] = t_dst + 8 * 8;
    dst[0] = s - 8;
    dst[1] = s;
  
    // Transpose back
    highbd_transpose(src, 8, dst, p, 2);
  }
  
  void aom_highbd_lpf_vertical_16_dual_sse2(uint16_t *s, int p,
                                            const uint8_t *blimit,
                                            const uint8_t *limit,
                                            const uint8_t *thresh, int bd) {
    DECLARE_ALIGNED(16, uint16_t, t_dst[256]);
  
    //  Transpose 16x16
    highbd_transpose8x16(s - 8, s - 8 + 8 * p, p, t_dst, 16);
    highbd_transpose8x16(s, s + 8 * p, p, t_dst + 8 * 16, 16);
  
    //  Loop filtering
    aom_highbd_lpf_horizontal_edge_16_sse2(t_dst + 8 * 16, 16, blimit, limit,
                                           thresh, bd);
  
    //  Transpose back
    highbd_transpose8x16(t_dst, t_dst + 8 * 16, 16, s - 8, p);
    highbd_transpose8x16(t_dst + 8, t_dst + 8 + 8 * 16, 16, s - 8 + 8 * p, p);
  }
  