xref: /external/libvpx/libvpx/vpx_dsp/x86/loopfilter_avx2.c

/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include <immintrin.h>  /* AVX2 */

#include "./vpx_dsp_rtcd.h"
#include "vpx_ports/mem.h"

static void mb_lpf_horizontal_edge_w_avx2_8(unsigned char *s, int p,
        const unsigned char *_blimit, const unsigned char *_limit,
        const unsigned char *_thresh) {
    __m128i mask, hev, flat, flat2;
    const __m128i zero = _mm_set1_epi16(0);
    const __m128i one = _mm_set1_epi8(1);
    __m128i q7p7, q6p6, q5p5, q4p4, q3p3, q2p2, q1p1, q0p0, p0q0, p1q1;
    __m128i abs_p1p0;

    const __m128i thresh = _mm_broadcastb_epi8(
            _mm_cvtsi32_si128((int) _thresh[0]));
    const __m128i limit = _mm_broadcastb_epi8(
            _mm_cvtsi32_si128((int) _limit[0]));
    const __m128i blimit = _mm_broadcastb_epi8(
            _mm_cvtsi32_si128((int) _blimit[0]));

    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 = _mm_or_si128(_mm_subs_epu8(q1p1, q0p0),
                _mm_subs_epu8(q0p0, q1p1));
        abs_q1q0 = _mm_srli_si128(abs_p1p0, 8);
        fe = _mm_set1_epi8(0xfe);
        ff = _mm_cmpeq_epi8(abs_p1p0, abs_p1p0);
        abs_p0q0 = _mm_or_si128(_mm_subs_epu8(q0p0, p0q0),
                _mm_subs_epu8(p0q0, q0p0));
        abs_p1q1 = _mm_or_si128(_mm_subs_epu8(q1p1, p1q1),
                _mm_subs_epu8(p1q1, q1p1));
        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(
                _mm_or_si128(_mm_subs_epu8(q2p2, q1p1),
                        _mm_subs_epu8(q1p1, q2p2)),
                _mm_or_si128(_mm_subs_epu8(q3p3, q2p2),
                        _mm_subs_epu8(q2p2, q3p3)));
        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_q6p6, 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);
        /* (vpx_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(
                    _mm_or_si128(_mm_subs_epu8(q2p2, q0p0),
                            _mm_subs_epu8(q0p0, q2p2)),
                    _mm_or_si128(_mm_subs_epu8(q3p3, q0p0),
                            _mm_subs_epu8(q0p0, q3p3)));
            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(
                    _mm_or_si128(_mm_subs_epu8(q4p4, q0p0),
                            _mm_subs_epu8(q0p0, q4p4)),
                    _mm_or_si128(_mm_subs_epu8(q5p5, q0p0),
                            _mm_subs_epu8(q0p0, q5p5)));

            q7p7 = _mm_loadl_epi64((__m128i *) (s - 8 * p));
            q7p7 = _mm_castps_si128(
                    _mm_loadh_pi(_mm_castsi128_ps(q7p7),
                            (__m64 *) (s + 7 * p)));

            work = _mm_max_epu8(
                    _mm_or_si128(_mm_subs_epu8(q6p6, q0p0),
                            _mm_subs_epu8(q0p0, q6p6)),
                    _mm_or_si128(_mm_subs_epu8(q7p7, q0p0),
                            _mm_subs_epu8(q0p0, q7p7)));

            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 p7_16, p6_16, p5_16, p4_16, p3_16, p2_16, p1_16, p0_16;
            __m128i q7_16, 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_p7, sum_q7, sum_p3, sum_q3, res_p, res_q;

            p7_16 = _mm_unpacklo_epi8(q7p7, zero);
            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);
            q7_16 = _mm_unpackhi_epi8(q7p7, zero);

            pixelFilter_p = _mm_add_epi16(_mm_add_epi16(p6_16, p5_16),
                    _mm_add_epi16(p4_16, p3_16));
            pixelFilter_q = _mm_add_epi16(_mm_add_epi16(q6_16, 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(p7_16, p0_16)),
                    4);
            res_q = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_p, _mm_add_epi16(q7_16, q0_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_p7 = _mm_add_epi16(p7_16, p7_16);
            sum_q7 = _mm_add_epi16(q7_16, q7_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, p6_16);
            pixelFilter_p = _mm_sub_epi16(pixelFilter_p, q6_16);
            res_p = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p1_16)),
                    4);
            res_q = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q1_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_p7 = _mm_add_epi16(sum_p7, p7_16);
            sum_q7 = _mm_add_epi16(sum_q7, q7_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, q5_16);
            pixelFilter_q = _mm_sub_epi16(pixelFilter_q, p5_16);
            res_p = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_p, _mm_add_epi16(sum_p7, p2_16)),
                    4);
            res_q = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q2_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_p7 = _mm_add_epi16(sum_p7, p7_16);
            sum_q7 = _mm_add_epi16(sum_q7, q7_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_p7, p3_16)),
                    4);
            res_q = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q3_16)),
                    4);
            flat2_q3p3 = _mm_packus_epi16(res_p, res_q);

            sum_p7 = _mm_add_epi16(sum_p7, p7_16);
            sum_q7 = _mm_add_epi16(sum_q7, q7_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_p7, p4_16)),
                    4);
            res_q = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q4_16)),
                    4);
            flat2_q4p4 = _mm_packus_epi16(res_p, res_q);

            sum_p7 = _mm_add_epi16(sum_p7, p7_16);
            sum_q7 = _mm_add_epi16(sum_q7, q7_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_p7, p5_16)),
                    4);
            res_q = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q5_16)),
                    4);
            flat2_q5p5 = _mm_packus_epi16(res_p, res_q);

            sum_p7 = _mm_add_epi16(sum_p7, p7_16);
            sum_q7 = _mm_add_epi16(sum_q7, q7_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_p7, p6_16)),
                    4);
            res_q = _mm_srli_epi16(
                    _mm_add_epi16(pixelFilter_q, _mm_add_epi16(sum_q7, q6_16)),
                    4);
            flat2_q6p6 = _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);

        q6p6 = _mm_andnot_si128(flat2, q6p6);
        flat2_q6p6 = _mm_and_si128(flat2, flat2_q6p6);
        q6p6 = _mm_or_si128(q6p6, flat2_q6p6);
        _mm_storel_epi64((__m128i *) (s - 7 * p), q6p6);
        _mm_storeh_pi((__m64 *) (s + 6 * p), _mm_castsi128_ps(q6p6));

        q5p5 = _mm_andnot_si128(flat2, q5p5);
        flat2_q5p5 = _mm_and_si128(flat2, flat2_q5p5);
        q5p5 = _mm_or_si128(q5p5, flat2_q5p5);
        _mm_storel_epi64((__m128i *) (s - 6 * p), q5p5);
        _mm_storeh_pi((__m64 *) (s + 5 * p), _mm_castsi128_ps(q5p5));

        q4p4 = _mm_andnot_si128(flat2, q4p4);
        flat2_q4p4 = _mm_and_si128(flat2, flat2_q4p4);
        q4p4 = _mm_or_si128(q4p4, flat2_q4p4);
        _mm_storel_epi64((__m128i *) (s - 5 * p), q4p4);
        _mm_storeh_pi((__m64 *) (s + 4 * p), _mm_castsi128_ps(q4p4));

        q3p3 = _mm_andnot_si128(flat2, q3p3);
        flat2_q3p3 = _mm_and_si128(flat2, flat2_q3p3);
        q3p3 = _mm_or_si128(q3p3, flat2_q3p3);
        _mm_storel_epi64((__m128i *) (s - 4 * p), q3p3);
        _mm_storeh_pi((__m64 *) (s + 3 * p), _mm_castsi128_ps(q3p3));

        q2p2 = _mm_andnot_si128(flat2, q2p2);
        flat2_q2p2 = _mm_and_si128(flat2, flat2_q2p2);
        q2p2 = _mm_or_si128(q2p2, flat2_q2p2);
        _mm_storel_epi64((__m128i *) (s - 3 * p), q2p2);
        _mm_storeh_pi((__m64 *) (s + 2 * p), _mm_castsi128_ps(q2p2));

        q1p1 = _mm_andnot_si128(flat2, q1p1);
        flat2_q1p1 = _mm_and_si128(flat2, flat2_q1p1);
        q1p1 = _mm_or_si128(q1p1, flat2_q1p1);
        _mm_storel_epi64((__m128i *) (s - 2 * p), q1p1);
        _mm_storeh_pi((__m64 *) (s + 1 * p), _mm_castsi128_ps(q1p1));

        q0p0 = _mm_andnot_si128(flat2, q0p0);
        flat2_q0p0 = _mm_and_si128(flat2, flat2_q0p0);
        q0p0 = _mm_or_si128(q0p0, flat2_q0p0);
        _mm_storel_epi64((__m128i *) (s - 1 * p), q0p0);
        _mm_storeh_pi((__m64 *) (s - 0 * p), _mm_castsi128_ps(q0p0));
    }
}

DECLARE_ALIGNED(32, static const uint8_t, filt_loopfilter_avx2[32]) = {
  0, 128, 1, 128, 2, 128, 3, 128, 4, 128, 5, 128, 6, 128, 7, 128,
  8, 128, 9, 128, 10, 128, 11, 128, 12, 128, 13, 128, 14, 128, 15, 128
};

static void mb_lpf_horizontal_edge_w_avx2_16(unsigned char *s, int p,
        const unsigned char *_blimit, const unsigned char *_limit,
        const unsigned char *_thresh) {
    __m128i mask, hev, flat, flat2;
    const __m128i zero = _mm_set1_epi16(0);
    const __m128i one = _mm_set1_epi8(1);
    __m128i p7, p6, p5;
    __m128i p4, p3, p2, p1, p0, q0, q1, q2, q3, q4;
    __m128i q5, q6, q7;
    __m256i p256_7, q256_7, p256_6, q256_6, p256_5, q256_5, p256_4,
            q256_4, p256_3, q256_3, p256_2, q256_2, p256_1, q256_1,
            p256_0, q256_0;

    const __m128i thresh = _mm_broadcastb_epi8(
            _mm_cvtsi32_si128((int) _thresh[0]));
    const __m128i limit = _mm_broadcastb_epi8(
            _mm_cvtsi32_si128((int) _limit[0]));
    const __m128i blimit = _mm_broadcastb_epi8(
            _mm_cvtsi32_si128((int) _blimit[0]));

    p256_4 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s - 5 * p)));
    p256_3 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s - 4 * p)));
    p256_2 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s - 3 * p)));
    p256_1 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s - 2 * p)));
    p256_0 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s - 1 * p)));
    q256_0 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s - 0 * p)));
    q256_1 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s + 1 * p)));
    q256_2 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s + 2 * p)));
    q256_3 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s + 3 * p)));
    q256_4 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                (__m128d const *)(s + 4 * p)));

    p4 = _mm256_castsi256_si128(p256_4);
    p3 = _mm256_castsi256_si128(p256_3);
    p2 = _mm256_castsi256_si128(p256_2);
    p1 = _mm256_castsi256_si128(p256_1);
    p0 = _mm256_castsi256_si128(p256_0);
    q0 = _mm256_castsi256_si128(q256_0);
    q1 = _mm256_castsi256_si128(q256_1);
    q2 = _mm256_castsi256_si128(q256_2);
    q3 = _mm256_castsi256_si128(q256_3);
    q4 = _mm256_castsi256_si128(q256_4);

    {
        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));
        __m128i work;
        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);
    }

    // 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);

        __m128i ps1 = _mm_xor_si128(p1, t80);
        __m128i ps0 = _mm_xor_si128(p0, t80);
        __m128i qs0 = _mm_xor_si128(q0, t80);
        __m128i qs1 = _mm_xor_si128(q1, t80);
        __m128i filt;
        __m128i work_a;
        __m128i filter1, filter2;
        __m128i flat2_p6, flat2_p5, flat2_p4, flat2_p3, flat2_p2, flat2_p1,
                flat2_p0, flat2_q0, flat2_q1, flat2_q2, flat2_q3, flat2_q4,
                flat2_q5, flat2_q6, flat_p2, flat_p1, flat_p0, flat_q0, flat_q1,
                flat_q2;

        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);
        /* (vpx_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);
        qs0 = _mm_xor_si128(_mm_subs_epi8(qs0, filter1), t80);

        /* 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);
        ps0 = _mm_xor_si128(_mm_adds_epi8(ps0, filter2), t80);

        /* 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);
        ps1 = _mm_xor_si128(_mm_adds_epi8(ps1, filt), t80);
        qs1 = _mm_xor_si128(_mm_subs_epi8(qs1, filt), t80);
        // loopfilter done

        {
            __m128i work;
            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);
            work = _mm_max_epu8(
                    _mm_or_si128(_mm_subs_epu8(p4, p0), _mm_subs_epu8(p0, p4)),
                    _mm_or_si128(_mm_subs_epu8(q4, q0), _mm_subs_epu8(q0, q4)));
            flat = _mm_subs_epu8(flat, one);
            flat = _mm_cmpeq_epi8(flat, zero);
            flat = _mm_and_si128(flat, mask);

            p256_5 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                        (__m128d const *)(s - 6 * p)));
            q256_5 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                        (__m128d const *)(s + 5 * p)));
            p5 = _mm256_castsi256_si128(p256_5);
            q5 = _mm256_castsi256_si128(q256_5);
            flat2 = _mm_max_epu8(
                    _mm_or_si128(_mm_subs_epu8(p5, p0), _mm_subs_epu8(p0, p5)),
                    _mm_or_si128(_mm_subs_epu8(q5, q0), _mm_subs_epu8(q0, q5)));

            flat2 = _mm_max_epu8(work, flat2);
            p256_6 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                        (__m128d const *)(s - 7 * p)));
            q256_6 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                        (__m128d const *)(s + 6 * p)));
            p6 = _mm256_castsi256_si128(p256_6);
            q6 = _mm256_castsi256_si128(q256_6);
            work = _mm_max_epu8(
                    _mm_or_si128(_mm_subs_epu8(p6, p0), _mm_subs_epu8(p0, p6)),
                    _mm_or_si128(_mm_subs_epu8(q6, q0), _mm_subs_epu8(q0, q6)));

            flat2 = _mm_max_epu8(work, flat2);

            p256_7 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                        (__m128d const *)(s - 8 * p)));
            q256_7 = _mm256_castpd_si256(_mm256_broadcast_pd(
                                        (__m128d const *)(s + 7 * p)));
            p7 = _mm256_castsi256_si128(p256_7);
            q7 = _mm256_castsi256_si128(q256_7);
            work = _mm_max_epu8(
                    _mm_or_si128(_mm_subs_epu8(p7, p0), _mm_subs_epu8(p0, p7)),
                    _mm_or_si128(_mm_subs_epu8(q7, q0), _mm_subs_epu8(q0, q7)));

            flat2 = _mm_max_epu8(work, flat2);
            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 __m256i eight = _mm256_set1_epi16(8);
            const __m256i four = _mm256_set1_epi16(4);
            __m256i pixelFilter_p, pixelFilter_q, pixetFilter_p2p1p0,
                    pixetFilter_q2q1q0, sum_p7, sum_q7, sum_p3, sum_q3, res_p,
                    res_q;

            const __m256i filter = _mm256_load_si256(
                                  (__m256i const *)filt_loopfilter_avx2);
            p256_7 = _mm256_shuffle_epi8(p256_7, filter);
            p256_6 = _mm256_shuffle_epi8(p256_6, filter);
            p256_5 = _mm256_shuffle_epi8(p256_5, filter);
            p256_4 = _mm256_shuffle_epi8(p256_4, filter);
            p256_3 = _mm256_shuffle_epi8(p256_3, filter);
            p256_2 = _mm256_shuffle_epi8(p256_2, filter);
            p256_1 = _mm256_shuffle_epi8(p256_1, filter);
            p256_0 = _mm256_shuffle_epi8(p256_0, filter);
            q256_0 = _mm256_shuffle_epi8(q256_0, filter);
            q256_1 = _mm256_shuffle_epi8(q256_1, filter);
            q256_2 = _mm256_shuffle_epi8(q256_2, filter);
            q256_3 = _mm256_shuffle_epi8(q256_3, filter);
            q256_4 = _mm256_shuffle_epi8(q256_4, filter);
            q256_5 = _mm256_shuffle_epi8(q256_5, filter);
            q256_6 = _mm256_shuffle_epi8(q256_6, filter);
            q256_7 = _mm256_shuffle_epi8(q256_7, filter);

            pixelFilter_p = _mm256_add_epi16(_mm256_add_epi16(p256_6, p256_5),
                    _mm256_add_epi16(p256_4, p256_3));
            pixelFilter_q = _mm256_add_epi16(_mm256_add_epi16(q256_6, q256_5),
                    _mm256_add_epi16(q256_4, q256_3));

            pixetFilter_p2p1p0 = _mm256_add_epi16(p256_0,
                    _mm256_add_epi16(p256_2, p256_1));
            pixelFilter_p = _mm256_add_epi16(pixelFilter_p, pixetFilter_p2p1p0);

            pixetFilter_q2q1q0 = _mm256_add_epi16(q256_0,
                    _mm256_add_epi16(q256_2, q256_1));
            pixelFilter_q = _mm256_add_epi16(pixelFilter_q, pixetFilter_q2q1q0);

            pixelFilter_p = _mm256_add_epi16(eight,
                    _mm256_add_epi16(pixelFilter_p, pixelFilter_q));

            pixetFilter_p2p1p0 = _mm256_add_epi16(four,
                    _mm256_add_epi16(pixetFilter_p2p1p0, pixetFilter_q2q1q0));

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(p256_7, p256_0)), 4);

            flat2_p0 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(q256_7, q256_0)), 4);

            flat2_q0 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixetFilter_p2p1p0,
                            _mm256_add_epi16(p256_3, p256_0)), 3);

            flat_p0 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixetFilter_p2p1p0,
                            _mm256_add_epi16(q256_3, q256_0)), 3);

            flat_q0 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            sum_p7 = _mm256_add_epi16(p256_7, p256_7);

            sum_q7 = _mm256_add_epi16(q256_7, q256_7);

            sum_p3 = _mm256_add_epi16(p256_3, p256_3);

            sum_q3 = _mm256_add_epi16(q256_3, q256_3);

            pixelFilter_q = _mm256_sub_epi16(pixelFilter_p, p256_6);

            pixelFilter_p = _mm256_sub_epi16(pixelFilter_p, q256_6);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(sum_p7, p256_1)), 4);

            flat2_p1 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_q,
                            _mm256_add_epi16(sum_q7, q256_1)), 4);

            flat2_q1 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            pixetFilter_q2q1q0 = _mm256_sub_epi16(pixetFilter_p2p1p0, p256_2);

            pixetFilter_p2p1p0 = _mm256_sub_epi16(pixetFilter_p2p1p0, q256_2);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixetFilter_p2p1p0,
                            _mm256_add_epi16(sum_p3, p256_1)), 3);

            flat_p1 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixetFilter_q2q1q0,
                            _mm256_add_epi16(sum_q3, q256_1)), 3);

            flat_q1 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            sum_p7 = _mm256_add_epi16(sum_p7, p256_7);

            sum_q7 = _mm256_add_epi16(sum_q7, q256_7);

            sum_p3 = _mm256_add_epi16(sum_p3, p256_3);

            sum_q3 = _mm256_add_epi16(sum_q3, q256_3);

            pixelFilter_p = _mm256_sub_epi16(pixelFilter_p, q256_5);

            pixelFilter_q = _mm256_sub_epi16(pixelFilter_q, p256_5);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(sum_p7, p256_2)), 4);

            flat2_p2 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_q,
                            _mm256_add_epi16(sum_q7, q256_2)), 4);

            flat2_q2 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            pixetFilter_p2p1p0 = _mm256_sub_epi16(pixetFilter_p2p1p0, q256_1);

            pixetFilter_q2q1q0 = _mm256_sub_epi16(pixetFilter_q2q1q0, p256_1);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixetFilter_p2p1p0,
                            _mm256_add_epi16(sum_p3, p256_2)), 3);

            flat_p2 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixetFilter_q2q1q0,
                            _mm256_add_epi16(sum_q3, q256_2)), 3);

            flat_q2 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            sum_p7 = _mm256_add_epi16(sum_p7, p256_7);

            sum_q7 = _mm256_add_epi16(sum_q7, q256_7);

            pixelFilter_p = _mm256_sub_epi16(pixelFilter_p, q256_4);

            pixelFilter_q = _mm256_sub_epi16(pixelFilter_q, p256_4);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(sum_p7, p256_3)), 4);

            flat2_p3 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_q,
                            _mm256_add_epi16(sum_q7, q256_3)), 4);

            flat2_q3 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            sum_p7 = _mm256_add_epi16(sum_p7, p256_7);

            sum_q7 = _mm256_add_epi16(sum_q7, q256_7);

            pixelFilter_p = _mm256_sub_epi16(pixelFilter_p, q256_3);

            pixelFilter_q = _mm256_sub_epi16(pixelFilter_q, p256_3);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(sum_p7, p256_4)), 4);

            flat2_p4 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_q,
                            _mm256_add_epi16(sum_q7, q256_4)), 4);

            flat2_q4 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            sum_p7 = _mm256_add_epi16(sum_p7, p256_7);

            sum_q7 = _mm256_add_epi16(sum_q7, q256_7);

            pixelFilter_p = _mm256_sub_epi16(pixelFilter_p, q256_2);

            pixelFilter_q = _mm256_sub_epi16(pixelFilter_q, p256_2);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(sum_p7, p256_5)), 4);

            flat2_p5 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_q,
                            _mm256_add_epi16(sum_q7, q256_5)), 4);

            flat2_q5 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));

            sum_p7 = _mm256_add_epi16(sum_p7, p256_7);

            sum_q7 = _mm256_add_epi16(sum_q7, q256_7);

            pixelFilter_p = _mm256_sub_epi16(pixelFilter_p, q256_1);

            pixelFilter_q = _mm256_sub_epi16(pixelFilter_q, p256_1);

            res_p = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_p,
                            _mm256_add_epi16(sum_p7, p256_6)), 4);

            flat2_p6 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_p, res_p),
                            168));

            res_q = _mm256_srli_epi16(
                    _mm256_add_epi16(pixelFilter_q,
                            _mm256_add_epi16(sum_q7, q256_6)), 4);

            flat2_q6 = _mm256_castsi256_si128(
                    _mm256_permute4x64_epi64(_mm256_packus_epi16(res_q, res_q),
                            168));
        }

        // wide flat
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

        p2 = _mm_andnot_si128(flat, p2);
        flat_p2 = _mm_and_si128(flat, flat_p2);
        p2 = _mm_or_si128(flat_p2, p2);

        p1 = _mm_andnot_si128(flat, ps1);
        flat_p1 = _mm_and_si128(flat, flat_p1);
        p1 = _mm_or_si128(flat_p1, p1);

        p0 = _mm_andnot_si128(flat, ps0);
        flat_p0 = _mm_and_si128(flat, flat_p0);
        p0 = _mm_or_si128(flat_p0, p0);

        q0 = _mm_andnot_si128(flat, qs0);
        flat_q0 = _mm_and_si128(flat, flat_q0);
        q0 = _mm_or_si128(flat_q0, q0);

        q1 = _mm_andnot_si128(flat, qs1);
        flat_q1 = _mm_and_si128(flat, flat_q1);
        q1 = _mm_or_si128(flat_q1, q1);

        q2 = _mm_andnot_si128(flat, q2);
        flat_q2 = _mm_and_si128(flat, flat_q2);
        q2 = _mm_or_si128(flat_q2, q2);

        p6 = _mm_andnot_si128(flat2, p6);
        flat2_p6 = _mm_and_si128(flat2, flat2_p6);
        p6 = _mm_or_si128(flat2_p6, p6);
        _mm_storeu_si128((__m128i *) (s - 7 * p), p6);

        p5 = _mm_andnot_si128(flat2, p5);
        flat2_p5 = _mm_and_si128(flat2, flat2_p5);
        p5 = _mm_or_si128(flat2_p5, p5);
        _mm_storeu_si128((__m128i *) (s - 6 * p), p5);

        p4 = _mm_andnot_si128(flat2, p4);
        flat2_p4 = _mm_and_si128(flat2, flat2_p4);
        p4 = _mm_or_si128(flat2_p4, p4);
        _mm_storeu_si128((__m128i *) (s - 5 * p), p4);

        p3 = _mm_andnot_si128(flat2, p3);
        flat2_p3 = _mm_and_si128(flat2, flat2_p3);
        p3 = _mm_or_si128(flat2_p3, p3);
        _mm_storeu_si128((__m128i *) (s - 4 * p), p3);

        p2 = _mm_andnot_si128(flat2, p2);
        flat2_p2 = _mm_and_si128(flat2, flat2_p2);
        p2 = _mm_or_si128(flat2_p2, p2);
        _mm_storeu_si128((__m128i *) (s - 3 * p), p2);

        p1 = _mm_andnot_si128(flat2, p1);
        flat2_p1 = _mm_and_si128(flat2, flat2_p1);
        p1 = _mm_or_si128(flat2_p1, p1);
        _mm_storeu_si128((__m128i *) (s - 2 * p), p1);

        p0 = _mm_andnot_si128(flat2, p0);
        flat2_p0 = _mm_and_si128(flat2, flat2_p0);
        p0 = _mm_or_si128(flat2_p0, p0);
        _mm_storeu_si128((__m128i *) (s - 1 * p), p0);

        q0 = _mm_andnot_si128(flat2, q0);
        flat2_q0 = _mm_and_si128(flat2, flat2_q0);
        q0 = _mm_or_si128(flat2_q0, q0);
        _mm_storeu_si128((__m128i *) (s - 0 * p), q0);

        q1 = _mm_andnot_si128(flat2, q1);
        flat2_q1 = _mm_and_si128(flat2, flat2_q1);
        q1 = _mm_or_si128(flat2_q1, q1);
        _mm_storeu_si128((__m128i *) (s + 1 * p), q1);

        q2 = _mm_andnot_si128(flat2, q2);
        flat2_q2 = _mm_and_si128(flat2, flat2_q2);
        q2 = _mm_or_si128(flat2_q2, q2);
        _mm_storeu_si128((__m128i *) (s + 2 * p), q2);

        q3 = _mm_andnot_si128(flat2, q3);
        flat2_q3 = _mm_and_si128(flat2, flat2_q3);
        q3 = _mm_or_si128(flat2_q3, q3);
        _mm_storeu_si128((__m128i *) (s + 3 * p), q3);

        q4 = _mm_andnot_si128(flat2, q4);
        flat2_q4 = _mm_and_si128(flat2, flat2_q4);
        q4 = _mm_or_si128(flat2_q4, q4);
        _mm_storeu_si128((__m128i *) (s + 4 * p), q4);

        q5 = _mm_andnot_si128(flat2, q5);
        flat2_q5 = _mm_and_si128(flat2, flat2_q5);
        q5 = _mm_or_si128(flat2_q5, q5);
        _mm_storeu_si128((__m128i *) (s + 5 * p), q5);

        q6 = _mm_andnot_si128(flat2, q6);
        flat2_q6 = _mm_and_si128(flat2, flat2_q6);
        q6 = _mm_or_si128(flat2_q6, q6);
        _mm_storeu_si128((__m128i *) (s + 6 * p), q6);
    }
}

void vpx_lpf_horizontal_16_avx2(unsigned char *s, int p,
        const unsigned char *_blimit, const unsigned char *_limit,
        const unsigned char *_thresh, int count) {
    if (count == 1)
        mb_lpf_horizontal_edge_w_avx2_8(s, p, _blimit, _limit, _thresh);
    else
        mb_lpf_horizontal_edge_w_avx2_16(s, p, _blimit, _limit, _thresh);
}