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  •  * AltiVec optimizations (C) 2004 Romain Dolbeau <romain@dolbeau.org>
     *
     * based on code by Copyright (C) 2001-2003 Michael Niedermayer (michaelni@gmx.at)
     *
     * This file is part of FFmpeg.
     *
     * FFmpeg is free software; you can redistribute it and/or modify
     * it under the terms of the GNU General Public License as published by
     * the Free Software Foundation; either version 2 of the License, or
     * (at your option) any later version.
     *
     * FFmpeg is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with FFmpeg; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     */
    
    #include "libavutil/avutil.h"
    
    #define ALTIVEC_TRANSPOSE_8x8_SHORT(src_a,src_b,src_c,src_d,src_e,src_f,src_g,src_h) \
    
        do {                                                          \
            __typeof__(src_a) tempA1, tempB1, tempC1, tempD1;         \
            __typeof__(src_a) tempE1, tempF1, tempG1, tempH1;         \
            __typeof__(src_a) tempA2, tempB2, tempC2, tempD2;         \
            __typeof__(src_a) tempE2, tempF2, tempG2, tempH2;         \
            tempA1 = vec_mergeh (src_a, src_e);                       \
            tempB1 = vec_mergel (src_a, src_e);                       \
            tempC1 = vec_mergeh (src_b, src_f);                       \
            tempD1 = vec_mergel (src_b, src_f);                       \
            tempE1 = vec_mergeh (src_c, src_g);                       \
            tempF1 = vec_mergel (src_c, src_g);                       \
            tempG1 = vec_mergeh (src_d, src_h);                       \
            tempH1 = vec_mergel (src_d, src_h);                       \
            tempA2 = vec_mergeh (tempA1, tempE1);                     \
            tempB2 = vec_mergel (tempA1, tempE1);                     \
            tempC2 = vec_mergeh (tempB1, tempF1);                     \
            tempD2 = vec_mergel (tempB1, tempF1);                     \
            tempE2 = vec_mergeh (tempC1, tempG1);                     \
            tempF2 = vec_mergel (tempC1, tempG1);                     \
            tempG2 = vec_mergeh (tempD1, tempH1);                     \
            tempH2 = vec_mergel (tempD1, tempH1);                     \
            src_a = vec_mergeh (tempA2, tempE2);                      \
            src_b = vec_mergel (tempA2, tempE2);                      \
            src_c = vec_mergeh (tempB2, tempF2);                      \
            src_d = vec_mergel (tempB2, tempF2);                      \
            src_e = vec_mergeh (tempC2, tempG2);                      \
            src_f = vec_mergel (tempC2, tempG2);                      \
            src_g = vec_mergeh (tempD2, tempH2);                      \
            src_h = vec_mergel (tempD2, tempH2);                      \
        } while (0)
    
    static inline int vertClassify_altivec(uint8_t src[], int stride, PPContext *c) {
    
        this code makes no assumption on src or stride.
        One could remove the recomputation of the perm
        vector by assuming (stride % 16) == 0, unfortunately
        this is not always true.
    
        DECLARE_ALIGNED(16, short, data[8]) =
                        {
                            ((c->nonBQP*c->ppMode.baseDcDiff)>>8) + 1,
                            data[0] * 2 + 1,
                            c->QP * 2,
                            c->QP * 4
                        };
    
        int numEq;
        uint8_t *src2 = src;
        vector signed short v_dcOffset;
        vector signed short v2QP;
        vector unsigned short v4QP;
        vector unsigned short v_dcThreshold;
        const int properStride = (stride % 16);
        const int srcAlign = ((unsigned long)src2 % 16);
        const int two_vectors = ((srcAlign > 8) || properStride) ? 1 : 0;
        const vector signed int zero = vec_splat_s32(0);
        const vector signed short mask = vec_splat_s16(1);
        vector signed int v_numEq = vec_splat_s32(0);
        vector signed short v_data = vec_ld(0, data);
    
        vector signed short v_srcAss0, v_srcAss1, v_srcAss2, v_srcAss3,
                            v_srcAss4, v_srcAss5, v_srcAss6, v_srcAss7;
    
    //FIXME avoid this mess if possible
        register int j0 = 0,
                     j1 = stride,
                     j2 = 2 * stride,
                     j3 = 3 * stride,
                     j4 = 4 * stride,
                     j5 = 5 * stride,
                     j6 = 6 * stride,
                     j7 = 7 * stride;
        vector unsigned char v_srcA0, v_srcA1, v_srcA2, v_srcA3,
                             v_srcA4, v_srcA5, v_srcA6, v_srcA7;
    
        v_dcOffset = vec_splat(v_data, 0);
        v_dcThreshold = (vector unsigned short)vec_splat(v_data, 1);
        v2QP = vec_splat(v_data, 2);
        v4QP = (vector unsigned short)vec_splat(v_data, 3);
    
        src2 += stride * 4;
    
    
    #define LOAD_LINE(i)                                                    \
    
        vector unsigned char perm##i = vec_lvsl(j##i, src2);                \
        vector unsigned char v_srcA2##i;                                    \
    
        vector unsigned char v_srcA1##i = vec_ld(j##i, src2);               \
    
        if (two_vectors)                                                    \
            v_srcA2##i = vec_ld(j##i + 16, src2);                           \
    
            vec_perm(v_srcA1##i, v_srcA2##i, perm##i);                      \
        v_srcAss##i =                                                       \
            (vector signed short)vec_mergeh((vector signed char)zero,       \
    
                                            (vector signed char)v_srcA##i); }
    
    #define LOAD_LINE_ALIGNED(i)                                            \
    
        v_srcA##i = vec_ld(j##i, src2);                                     \
    
        v_srcAss##i =                                                       \
            (vector signed short)vec_mergeh((vector signed char)zero,       \
                                            (vector signed char)v_srcA##i)
    
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        /* Special-casing the aligned case is worthwhile, as all calls from
         * the (transposed) horizontable deblocks will be aligned, in addition
         * to the naturally aligned vertical deblocks. */
    
        if (properStride && srcAlign) {
    
            LOAD_LINE_ALIGNED(0);
            LOAD_LINE_ALIGNED(1);
            LOAD_LINE_ALIGNED(2);
            LOAD_LINE_ALIGNED(3);
            LOAD_LINE_ALIGNED(4);
            LOAD_LINE_ALIGNED(5);
            LOAD_LINE_ALIGNED(6);
            LOAD_LINE_ALIGNED(7);
    
            LOAD_LINE(0);
            LOAD_LINE(1);
            LOAD_LINE(2);
            LOAD_LINE(3);
            LOAD_LINE(4);
            LOAD_LINE(5);
            LOAD_LINE(6);
            LOAD_LINE(7);
    
    #undef LOAD_LINE_ALIGNED
    
    #define ITER(i, j)                                                      \
    
        const vector signed short v_diff##i =                               \
            vec_sub(v_srcAss##i, v_srcAss##j);                              \
        const vector signed short v_sum##i =                                \
            vec_add(v_diff##i, v_dcOffset);                                 \
        const vector signed short v_comp##i =                               \
            (vector signed short)vec_cmplt((vector unsigned short)v_sum##i, \
                                           v_dcThreshold);                  \
    
        const vector signed short v_part##i = vec_and(mask, v_comp##i);
    
    
        {
            ITER(0, 1)
            ITER(1, 2)
            ITER(2, 3)
            ITER(3, 4)
            ITER(4, 5)
            ITER(5, 6)
            ITER(6, 7)
    
            v_numEq = vec_sum4s(v_part0, v_numEq);
            v_numEq = vec_sum4s(v_part1, v_numEq);
            v_numEq = vec_sum4s(v_part2, v_numEq);
            v_numEq = vec_sum4s(v_part3, v_numEq);
            v_numEq = vec_sum4s(v_part4, v_numEq);
            v_numEq = vec_sum4s(v_part5, v_numEq);
            v_numEq = vec_sum4s(v_part6, v_numEq);
        }
    
        v_numEq = vec_sums(v_numEq, zero);
    
        v_numEq = vec_splat(v_numEq, 3);
        vec_ste(v_numEq, 0, &numEq);
    
        if (numEq > c->ppMode.flatnessThreshold){
            const vector unsigned char mmoP1 = (const vector unsigned char)
    
                {0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f,
                 0x00, 0x01, 0x12, 0x13, 0x08, 0x09, 0x1A, 0x1B};
    
            const vector unsigned char mmoP2 = (const vector unsigned char)
    
                {0x04, 0x05, 0x16, 0x17, 0x0C, 0x0D, 0x1E, 0x1F,
                 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f};
    
            const vector unsigned char mmoP = (const vector unsigned char)
                vec_lvsl(8, (unsigned char*)0);
    
            vector signed short mmoL1 = vec_perm(v_srcAss0, v_srcAss2, mmoP1);
            vector signed short mmoL2 = vec_perm(v_srcAss4, v_srcAss6, mmoP2);
            vector signed short mmoL = vec_perm(mmoL1, mmoL2, mmoP);
            vector signed short mmoR1 = vec_perm(v_srcAss5, v_srcAss7, mmoP1);
            vector signed short mmoR2 = vec_perm(v_srcAss1, v_srcAss3, mmoP2);
            vector signed short mmoR = vec_perm(mmoR1, mmoR2, mmoP);
            vector signed short mmoDiff = vec_sub(mmoL, mmoR);
            vector unsigned short mmoSum = (vector unsigned short)vec_add(mmoDiff, v2QP);
    
            if (vec_any_gt(mmoSum, v4QP))
                return 0;
            else
                return 1;
    
    static inline void doVertLowPass_altivec(uint8_t *src, int stride, PPContext *c) {
    
        this code makes no assumption on src or stride.
        One could remove the recomputation of the perm
        vector by assuming (stride % 16) == 0, unfortunately
        this is not always true. Quite a lot of load/stores
    
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        can be removed by assuming proper alignment of
    
        */
        uint8_t *src2 = src;
        const vector signed int zero = vec_splat_s32(0);
        const int properStride = (stride % 16);
        const int srcAlign = ((unsigned long)src2 % 16);
    
        DECLARE_ALIGNED(16, short, qp[8]) = {c->QP};
    
        vector signed short vqp = vec_ld(0, qp);
        vector signed short vb0, vb1, vb2, vb3, vb4, vb5, vb6, vb7, vb8, vb9;
        vector unsigned char vbA0, vbA1, vbA2, vbA3, vbA4, vbA5, vbA6, vbA7, vbA8, vbA9;
        vector unsigned char vbB0, vbB1, vbB2, vbB3, vbB4, vbB5, vbB6, vbB7, vbB8, vbB9;
        vector unsigned char vbT0, vbT1, vbT2, vbT3, vbT4, vbT5, vbT6, vbT7, vbT8, vbT9;
    
        vector unsigned char perml0, perml1, perml2, perml3, perml4,
                             perml5, perml6, perml7, perml8, perml9;
        register int j0 = 0,
                     j1 = stride,
                     j2 = 2 * stride,
                     j3 = 3 * stride,
                     j4 = 4 * stride,
                     j5 = 5 * stride,
                     j6 = 6 * stride,
                     j7 = 7 * stride,
                     j8 = 8 * stride,
                     j9 = 9 * stride;
    
        vqp = vec_splat(vqp, 0);
    
        src2 += stride*3;
    
        perml##i = vec_lvsl(i * stride, src2);                              \
    
        vbA##i = vec_ld(i * stride, src2);                                  \
        vbB##i = vec_ld(i * stride + 16, src2);                             \
        vbT##i = vec_perm(vbA##i, vbB##i, perml##i);                        \
        vb##i =                                                             \
            (vector signed short)vec_mergeh((vector unsigned char)zero,     \
                                            (vector unsigned char)vbT##i)
    
    #define LOAD_LINE_ALIGNED(i)                                            \
    
        vbT##i = vec_ld(j##i, src2);                                        \
        vb##i =                                                             \
            (vector signed short)vec_mergeh((vector signed char)zero,       \
                                            (vector signed char)vbT##i)
    
          /* Special-casing the aligned case is worthwhile, as all calls from
           * the (transposed) horizontable deblocks will be aligned, in addition
           * to the naturally aligned vertical deblocks. */
    
        if (properStride && srcAlign) {
    
              LOAD_LINE_ALIGNED(0);
              LOAD_LINE_ALIGNED(1);
              LOAD_LINE_ALIGNED(2);
              LOAD_LINE_ALIGNED(3);
              LOAD_LINE_ALIGNED(4);
              LOAD_LINE_ALIGNED(5);
              LOAD_LINE_ALIGNED(6);
              LOAD_LINE_ALIGNED(7);
              LOAD_LINE_ALIGNED(8);
              LOAD_LINE_ALIGNED(9);
    
              LOAD_LINE(0);
              LOAD_LINE(1);
              LOAD_LINE(2);
              LOAD_LINE(3);
              LOAD_LINE(4);
              LOAD_LINE(5);
              LOAD_LINE(6);
              LOAD_LINE(7);
              LOAD_LINE(8);
              LOAD_LINE(9);
    
    #undef LOAD_LINE_ALIGNED
    
        {
            const vector unsigned short v_2 = vec_splat_u16(2);
            const vector unsigned short v_4 = vec_splat_u16(4);
    
            const vector signed short v_diff01 = vec_sub(vb0, vb1);
            const vector unsigned short v_cmp01 =
                (const vector unsigned short) vec_cmplt(vec_abs(v_diff01), vqp);
            const vector signed short v_first = vec_sel(vb1, vb0, v_cmp01);
            const vector signed short v_diff89 = vec_sub(vb8, vb9);
            const vector unsigned short v_cmp89 =
                (const vector unsigned short) vec_cmplt(vec_abs(v_diff89), vqp);
            const vector signed short v_last = vec_sel(vb8, vb9, v_cmp89);
    
            const vector signed short temp01 = vec_mladd(v_first, (vector signed short)v_4, vb1);
            const vector signed short temp02 = vec_add(vb2, vb3);
            const vector signed short temp03 = vec_add(temp01, (vector signed short)v_4);
            const vector signed short v_sumsB0 = vec_add(temp02, temp03);
    
            const vector signed short temp11 = vec_sub(v_sumsB0, v_first);
            const vector signed short v_sumsB1 = vec_add(temp11, vb4);
    
            const vector signed short temp21 = vec_sub(v_sumsB1, v_first);
            const vector signed short v_sumsB2 = vec_add(temp21, vb5);
    
            const vector signed short temp31 = vec_sub(v_sumsB2, v_first);
            const vector signed short v_sumsB3 = vec_add(temp31, vb6);
    
            const vector signed short temp41 = vec_sub(v_sumsB3, v_first);
            const vector signed short v_sumsB4 = vec_add(temp41, vb7);
    
            const vector signed short temp51 = vec_sub(v_sumsB4, vb1);
            const vector signed short v_sumsB5 = vec_add(temp51, vb8);
    
            const vector signed short temp61 = vec_sub(v_sumsB5, vb2);
            const vector signed short v_sumsB6 = vec_add(temp61, v_last);
    
            const vector signed short temp71 = vec_sub(v_sumsB6, vb3);
            const vector signed short v_sumsB7 = vec_add(temp71, v_last);
    
            const vector signed short temp81 = vec_sub(v_sumsB7, vb4);
            const vector signed short v_sumsB8 = vec_add(temp81, v_last);
    
            const vector signed short temp91 = vec_sub(v_sumsB8, vb5);
            const vector signed short v_sumsB9 = vec_add(temp91, v_last);
    
        #define COMPUTE_VR(i, j, k)                                             \
            const vector signed short temps1##i =                               \
                vec_add(v_sumsB##i, v_sumsB##k);                                \
            const vector signed short temps2##i =                               \
                vec_mladd(vb##j, (vector signed short)v_2, temps1##i);          \
            const vector signed short  vr##j = vec_sra(temps2##i, v_4)
    
            COMPUTE_VR(0, 1, 2);
            COMPUTE_VR(1, 2, 3);
            COMPUTE_VR(2, 3, 4);
            COMPUTE_VR(3, 4, 5);
            COMPUTE_VR(4, 5, 6);
            COMPUTE_VR(5, 6, 7);
            COMPUTE_VR(6, 7, 8);
            COMPUTE_VR(7, 8, 9);
    
            const vector signed char neg1 = vec_splat_s8(-1);
    
            const vector unsigned char permHH = (const vector unsigned char){0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                                                                             0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F};
    
    
    #define PACK_AND_STORE(i)                                       \
    
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    {   const vector unsigned char perms##i =                       \
    
            vec_lvsr(i * stride, src2);                             \
        const vector unsigned char vf##i =                          \
            vec_packsu(vr##i, (vector signed short)zero);           \
        const vector unsigned char vg##i =                          \
            vec_perm(vf##i, vbT##i, permHH);                        \
        const vector unsigned char mask##i =                        \
            vec_perm((vector unsigned char)zero, (vector unsigned char)neg1, perms##i); \
        const vector unsigned char vg2##i =                         \
            vec_perm(vg##i, vg##i, perms##i);                       \
        const vector unsigned char svA##i =                         \
            vec_sel(vbA##i, vg2##i, mask##i);                       \
        const vector unsigned char svB##i =                         \
            vec_sel(vg2##i, vbB##i, mask##i);                       \
        vec_st(svA##i, i * stride, src2);                           \
    
        vec_st(svB##i, i * stride + 16, src2);}
    
    #define PACK_AND_STORE_ALIGNED(i)                               \
    
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    {   const vector unsigned char vf##i =                          \
    
            vec_packsu(vr##i, (vector signed short)zero);           \
        const vector unsigned char vg##i =                          \
            vec_perm(vf##i, vbT##i, permHH);                        \
    
        vec_st(vg##i, i * stride, src2);}
    
            /* Special-casing the aligned case is worthwhile, as all calls from
             * the (transposed) horizontable deblocks will be aligned, in addition
             * to the naturally aligned vertical deblocks. */
            if (properStride && srcAlign) {
                PACK_AND_STORE_ALIGNED(1)
                PACK_AND_STORE_ALIGNED(2)
                PACK_AND_STORE_ALIGNED(3)
                PACK_AND_STORE_ALIGNED(4)
                PACK_AND_STORE_ALIGNED(5)
                PACK_AND_STORE_ALIGNED(6)
                PACK_AND_STORE_ALIGNED(7)
                PACK_AND_STORE_ALIGNED(8)
            } else {
                PACK_AND_STORE(1)
                PACK_AND_STORE(2)
                PACK_AND_STORE(3)
                PACK_AND_STORE(4)
                PACK_AND_STORE(5)
                PACK_AND_STORE(6)
                PACK_AND_STORE(7)
                PACK_AND_STORE(8)
            }
        #undef PACK_AND_STORE
        #undef PACK_AND_STORE_ALIGNED
    
    
    
    
    static inline void doVertDefFilter_altivec(uint8_t src[], int stride, PPContext *c) {
    
        this code makes no assumption on src or stride.
        One could remove the recomputation of the perm
        vector by assuming (stride % 16) == 0, unfortunately
        this is not always true. Quite a lot of load/stores
    
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        can be removed by assuming proper alignment of
    
        uint8_t *src2 = src + stride*3;
    
        const vector signed int zero = vec_splat_s32(0);
    
        DECLARE_ALIGNED(16, short, qp[8]) = {8*c->QP};
        vector signed short vqp = vec_splat(
                                    (vector signed short)vec_ld(0, qp), 0);
    
        const vector unsigned char perm##i =                                \
            vec_lvsl(i * stride, src2);                                     \
        const vector unsigned char vbA##i =                                 \
            vec_ld(i * stride, src2);                                       \
        const vector unsigned char vbB##i =                                 \
            vec_ld(i * stride + 16, src2);                                  \
        const vector unsigned char vbT##i =                                 \
            vec_perm(vbA##i, vbB##i, perm##i);                              \
        const vector signed short vb##i =                                   \
            (vector signed short)vec_mergeh((vector unsigned char)zero,     \
                                            (vector unsigned char)vbT##i)
    
         LOAD_LINE(1);
         LOAD_LINE(2);
         LOAD_LINE(3);
         LOAD_LINE(4);
         LOAD_LINE(5);
         LOAD_LINE(6);
         LOAD_LINE(7);
         LOAD_LINE(8);
    
         const vector signed short v_1 = vec_splat_s16(1);
         const vector signed short v_2 = vec_splat_s16(2);
         const vector signed short v_5 = vec_splat_s16(5);
         const vector signed short v_32 = vec_sl(v_1,
                                                 (vector unsigned short)v_5);
         /* middle energy */
         const vector signed short l3minusl6 = vec_sub(vb3, vb6);
         const vector signed short l5minusl4 = vec_sub(vb5, vb4);
         const vector signed short twotimes_l3minusl6 = vec_mladd(v_2, l3minusl6, (vector signed short)zero);
         const vector signed short mE = vec_mladd(v_5, l5minusl4, twotimes_l3minusl6);
         const vector signed short absmE = vec_abs(mE);
         /* left & right energy */
         const vector signed short l1minusl4 = vec_sub(vb1, vb4);
         const vector signed short l3minusl2 = vec_sub(vb3, vb2);
         const vector signed short l5minusl8 = vec_sub(vb5, vb8);
         const vector signed short l7minusl6 = vec_sub(vb7, vb6);
         const vector signed short twotimes_l1minusl4 = vec_mladd(v_2, l1minusl4, (vector signed short)zero);
         const vector signed short twotimes_l5minusl8 = vec_mladd(v_2, l5minusl8, (vector signed short)zero);
         const vector signed short lE = vec_mladd(v_5, l3minusl2, twotimes_l1minusl4);
         const vector signed short rE = vec_mladd(v_5, l7minusl6, twotimes_l5minusl8);
         /* d */
         const vector signed short ddiff = vec_sub(absmE,
                                                   vec_min(vec_abs(lE),
                                                           vec_abs(rE)));
         const vector signed short ddiffclamp = vec_max(ddiff, (vector signed short)zero);
         const vector signed short dtimes64 = vec_mladd(v_5, ddiffclamp, v_32);
         const vector signed short d = vec_sra(dtimes64, vec_splat_u16(6));
         const vector signed short minusd = vec_sub((vector signed short)zero, d);
         const vector signed short finald = vec_sel(minusd,
                                                    d,
                                                    vec_cmpgt(vec_sub((vector signed short)zero, mE),
                                                              (vector signed short)zero));
         /* q */
         const vector signed short qtimes2 = vec_sub(vb4, vb5);
         /* for a shift right to behave like /2, we need to add one
            to all negative integer */
         const vector signed short rounddown = vec_sel((vector signed short)zero,
                                                       v_1,
                                                       vec_cmplt(qtimes2, (vector signed short)zero));
         const vector signed short q = vec_sra(vec_add(qtimes2, rounddown), vec_splat_u16(1));
         /* clamp */
         const vector signed short dclamp_P1 = vec_max((vector signed short)zero, finald);
         const vector signed short dclamp_P = vec_min(dclamp_P1, q);
         const vector signed short dclamp_N1 = vec_min((vector signed short)zero, finald);
         const vector signed short dclamp_N = vec_max(dclamp_N1, q);
    
         const vector signed short dclampedfinal = vec_sel(dclamp_N,
                                                           dclamp_P,
                                                           vec_cmpgt(q, (vector signed short)zero));
         const vector signed short dornotd = vec_sel((vector signed short)zero,
                                                     dclampedfinal,
                                                     vec_cmplt(absmE, vqp));
         /* add/subtract to l4 and l5 */
         const vector signed short vb4minusd = vec_sub(vb4, dornotd);
         const vector signed short vb5plusd  = vec_add(vb5, dornotd);
         /* finally, stores */
         const vector unsigned char st4 = vec_packsu(vb4minusd, (vector signed short)zero);
         const vector unsigned char st5 = vec_packsu(vb5plusd,  (vector signed short)zero);
    
         const vector signed char neg1 = vec_splat_s8(-1);
    
         const vector unsigned char permHH = (const vector unsigned char){0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                                                                          0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F};
    
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    {    const vector unsigned char perms##i =                      \
    
             vec_lvsr(i * stride, src2);                            \
         const vector unsigned char vg##i =                         \
             vec_perm(st##i, vbT##i, permHH);                       \
         const vector unsigned char mask##i =                       \
             vec_perm((vector unsigned char)zero, (vector unsigned char)neg1, perms##i); \
         const vector unsigned char vg2##i =                        \
             vec_perm(vg##i, vg##i, perms##i);                      \
         const vector unsigned char svA##i =                        \
             vec_sel(vbA##i, vg2##i, mask##i);                      \
         const vector unsigned char svB##i =                        \
             vec_sel(vg2##i, vbB##i, mask##i);                      \
         vec_st(svA##i, i * stride, src2);                          \
    
         vec_st(svB##i, i * stride + 16, src2);}
    
    }
    
    static inline void dering_altivec(uint8_t src[], int stride, PPContext *c) {
    
        this code makes no assumption on src or stride.
        One could remove the recomputation of the perm
        vector by assuming (stride % 16) == 0, unfortunately
        this is not always true. Quite a lot of load/stores
    
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        can be removed by assuming proper alignment of
    
        */
        uint8_t *srcCopy = src;
        DECLARE_ALIGNED(16, uint8_t, dt[16]);
        const vector signed int zero = vec_splat_s32(0);
        vector unsigned char v_dt;
        dt[0] = deringThreshold;
        v_dt = vec_splat(vec_ld(0, dt), 0);
    
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    #define LOAD_LINE(i)                                                  \
        const vector unsigned char perm##i =                              \
            vec_lvsl(i * stride, srcCopy);                                \
        vector unsigned char sA##i = vec_ld(i * stride, srcCopy);         \
        vector unsigned char sB##i = vec_ld(i * stride + 16, srcCopy);    \
    
        vector unsigned char src##i = vec_perm(sA##i, sB##i, perm##i)
    
        LOAD_LINE(0);
        LOAD_LINE(1);
        LOAD_LINE(2);
        LOAD_LINE(3);
        LOAD_LINE(4);
        LOAD_LINE(5);
        LOAD_LINE(6);
        LOAD_LINE(7);
        LOAD_LINE(8);
        LOAD_LINE(9);
    
        const vector unsigned char trunc_perm = (vector unsigned char)
    
            {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
             0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18};
    
        const vector unsigned char trunc_src12 = vec_perm(src1, src2, trunc_perm);
        const vector unsigned char trunc_src34 = vec_perm(src3, src4, trunc_perm);
        const vector unsigned char trunc_src56 = vec_perm(src5, src6, trunc_perm);
        const vector unsigned char trunc_src78 = vec_perm(src7, src8, trunc_perm);
    
    #define EXTRACT(op) do {                                                \
    
        const vector unsigned char s##op##_1   = vec_##op(trunc_src12, trunc_src34); \
        const vector unsigned char s##op##_2   = vec_##op(trunc_src56, trunc_src78); \
        const vector unsigned char s##op##_6   = vec_##op(s##op##_1, s##op##_2);     \
        const vector unsigned char s##op##_8h  = vec_mergeh(s##op##_6, s##op##_6);   \
        const vector unsigned char s##op##_8l  = vec_mergel(s##op##_6, s##op##_6);   \
        const vector unsigned char s##op##_9   = vec_##op(s##op##_8h, s##op##_8l);   \
        const vector unsigned char s##op##_9h  = vec_mergeh(s##op##_9, s##op##_9);   \
        const vector unsigned char s##op##_9l  = vec_mergel(s##op##_9, s##op##_9);   \
        const vector unsigned char s##op##_10  = vec_##op(s##op##_9h, s##op##_9l);   \
        const vector unsigned char s##op##_10h = vec_mergeh(s##op##_10, s##op##_10); \
        const vector unsigned char s##op##_10l = vec_mergel(s##op##_10, s##op##_10); \
        const vector unsigned char s##op##_11  = vec_##op(s##op##_10h, s##op##_10l); \
        const vector unsigned char s##op##_11h = vec_mergeh(s##op##_11, s##op##_11); \
        const vector unsigned char s##op##_11l = vec_mergel(s##op##_11, s##op##_11); \
        v_##op = vec_##op(s##op##_11h, s##op##_11l); } while (0)
    
        vector unsigned char v_min;
        vector unsigned char v_max;
        EXTRACT(min);
        EXTRACT(max);
    #undef EXTRACT
    
        DECLARE_ALIGNED(16, signed int, S[8]);
        {
    
        const vector unsigned short mask1 = (vector unsigned short)
    
                                            {0x0001, 0x0002, 0x0004, 0x0008,
                                             0x0010, 0x0020, 0x0040, 0x0080};
    
        const vector unsigned short mask2 = (vector unsigned short)
    
                                            {0x0100, 0x0200, 0x0000, 0x0000,
                                             0x0000, 0x0000, 0x0000, 0x0000};
    
        const vector unsigned int vuint32_16 = vec_sl(vec_splat_u32(1), vec_splat_u32(4));
        const vector unsigned int vuint32_1 = vec_splat_u32(1);
    
    #define COMPARE(i)                                                      \
        vector signed int sum##i;                                           \
        do {                                                                \
    
            const vector unsigned char cmp##i =                             \
                (vector unsigned char)vec_cmpgt(src##i, v_avg);             \
            const vector unsigned short cmpHi##i =                          \
                (vector unsigned short)vec_mergeh(cmp##i, cmp##i);          \
            const vector unsigned short cmpLi##i =                          \
                (vector unsigned short)vec_mergel(cmp##i, cmp##i);          \
            const vector signed short cmpHf##i =                            \
                (vector signed short)vec_and(cmpHi##i, mask1);              \
            const vector signed short cmpLf##i =                            \
                (vector signed short)vec_and(cmpLi##i, mask2);              \
            const vector signed int sump##i = vec_sum4s(cmpHf##i, zero);    \
            const vector signed int sumq##i = vec_sum4s(cmpLf##i, sump##i); \
            sum##i  = vec_sums(sumq##i, zero); } while (0)
    
        COMPARE(0);
        COMPARE(1);
        COMPARE(2);
        COMPARE(3);
        COMPARE(4);
        COMPARE(5);
        COMPARE(6);
        COMPARE(7);
        COMPARE(8);
        COMPARE(9);
    #undef COMPARE
    
        const vector signed int sump02 = vec_mergel(sum0, sum2);
        const vector signed int sump13 = vec_mergel(sum1, sum3);
        const vector signed int sumA = vec_mergel(sump02, sump13);
    
        const vector signed int sump46 = vec_mergel(sum4, sum6);
        const vector signed int sump57 = vec_mergel(sum5, sum7);
        const vector signed int sumB = vec_mergel(sump46, sump57);
    
        const vector signed int sump8A = vec_mergel(sum8, zero);
        const vector signed int sump9B = vec_mergel(sum9, zero);
        const vector signed int sumC = vec_mergel(sump8A, sump9B);
    
        const vector signed int tA = vec_sl(vec_nor(zero, sumA), vuint32_16);
        const vector signed int tB = vec_sl(vec_nor(zero, sumB), vuint32_16);
        const vector signed int tC = vec_sl(vec_nor(zero, sumC), vuint32_16);
        const vector signed int t2A = vec_or(sumA, tA);
        const vector signed int t2B = vec_or(sumB, tB);
        const vector signed int t2C = vec_or(sumC, tC);
        const vector signed int t3A = vec_and(vec_sra(t2A, vuint32_1),
                                              vec_sl(t2A, vuint32_1));
        const vector signed int t3B = vec_and(vec_sra(t2B, vuint32_1),
                                              vec_sl(t2B, vuint32_1));
        const vector signed int t3C = vec_and(vec_sra(t2C, vuint32_1),
                                              vec_sl(t2C, vuint32_1));
        const vector signed int yA = vec_and(t2A, t3A);
        const vector signed int yB = vec_and(t2B, t3B);
        const vector signed int yC = vec_and(t2C, t3C);
    
        const vector unsigned char strangeperm1 = vec_lvsl(4, (unsigned char*)0);
        const vector unsigned char strangeperm2 = vec_lvsl(8, (unsigned char*)0);
        const vector signed int sumAd4 = vec_perm(yA, yB, strangeperm1);
        const vector signed int sumAd8 = vec_perm(yA, yB, strangeperm2);
        const vector signed int sumBd4 = vec_perm(yB, yC, strangeperm1);
        const vector signed int sumBd8 = vec_perm(yB, yC, strangeperm2);
        const vector signed int sumAp = vec_and(yA,
                                                vec_and(sumAd4,sumAd8));
        const vector signed int sumBp = vec_and(yB,
                                                vec_and(sumBd4,sumBd8));
        sumA2 = vec_or(sumAp,
                       vec_sra(sumAp,
                               vuint32_16));
        sumB2  = vec_or(sumBp,
                        vec_sra(sumBp,
                                vuint32_16));
    
        }
    
        /* I'm not sure the following is actually faster
           than straight, unvectorized C code :-( */
    
        DECLARE_ALIGNED(16, int, tQP2[4]);
        tQP2[0]= c->QP/2 + 1;
        vector signed int vQP2 = vec_ld(0, tQP2);
        vQP2 = vec_splat(vQP2, 0);
        const vector signed int vsint32_8 = vec_splat_s32(8);
        const vector unsigned int vuint32_4 = vec_splat_u32(4);
    
        const vector unsigned char permA1 = (vector unsigned char)
    
            {0x00, 0x01, 0x02, 0x10, 0x11, 0x12, 0x1F, 0x1F,
             0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F};
    
        const vector unsigned char permA2 = (vector unsigned char)
    
            {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x10, 0x11,
             0x12, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F};
    
        const vector unsigned char permA1inc = (vector unsigned char)
    
            {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00,
             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
    
        const vector unsigned char permA2inc = (vector unsigned char)
    
            {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
             0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
    
        const vector unsigned char magic = (vector unsigned char)
    
            {0x01, 0x02, 0x01, 0x02, 0x04, 0x02, 0x01, 0x02,
             0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
    
        const vector unsigned char extractPerm = (vector unsigned char)
    
            {0x10, 0x10, 0x10, 0x01, 0x10, 0x10, 0x10, 0x01,
             0x10, 0x10, 0x10, 0x01, 0x10, 0x10, 0x10, 0x01};
    
        const vector unsigned char extractPermInc = (vector unsigned char)
    
            {0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
             0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01};
    
        const vector unsigned char identity = vec_lvsl(0,(unsigned char *)0);
        const vector unsigned char tenRight = (vector unsigned char)
    
            {0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
    
        const vector unsigned char eightLeft = (vector unsigned char)
    
            {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08};
    
    #define F_INIT(i)                                       \
    
        vector unsigned char tenRightM##i = tenRight;       \
        vector unsigned char permA1M##i = permA1;           \
        vector unsigned char permA2M##i = permA2;           \
        vector unsigned char extractPermM##i = extractPerm
    
    #define F2(i, j, k, l)                                                  \
    
        if (S[i] & (1 << (l+1))) {                                          \
            const vector unsigned char a_##j##_A##l =                       \
                vec_perm(src##i, src##j, permA1M##i);                       \
            const vector unsigned char a_##j##_B##l =                       \
                vec_perm(a_##j##_A##l, src##k, permA2M##i);                 \
            const vector signed int a_##j##_sump##l =                       \
                (vector signed int)vec_msum(a_##j##_B##l, magic,            \
                                            (vector unsigned int)zero);     \
            vector signed int F_##j##_##l =                                 \
                vec_sr(vec_sums(a_##j##_sump##l, vsint32_8), vuint32_4);    \
            F_##j##_##l = vec_splat(F_##j##_##l, 3);                        \
            const vector signed int p_##j##_##l =                           \
                (vector signed int)vec_perm(src##j,                         \
                                            (vector unsigned char)zero,     \
                                            extractPermM##i);               \
            const vector signed int sum_##j##_##l  = vec_add( p_##j##_##l, vQP2);\
            const vector signed int diff_##j##_##l = vec_sub( p_##j##_##l, vQP2);\
            vector signed int newpm_##j##_##l;                              \
            if (vec_all_lt(sum_##j##_##l, F_##j##_##l))                     \
                newpm_##j##_##l = sum_##j##_##l;                            \
            else if (vec_all_gt(diff_##j##_##l, F_##j##_##l))               \
                newpm_##j##_##l = diff_##j##_##l;                           \
            else newpm_##j##_##l = F_##j##_##l;                             \
            const vector unsigned char newpm2_##j##_##l =                   \
                vec_splat((vector unsigned char)newpm_##j##_##l, 15);       \
            const vector unsigned char mask##j##l = vec_add(identity,       \
                                                            tenRightM##i);  \
            src##j = vec_perm(src##j, newpm2_##j##_##l, mask##j##l);        \
        }                                                                   \
        permA1M##i = vec_add(permA1M##i, permA1inc);                        \
        permA2M##i = vec_add(permA2M##i, permA2inc);                        \
        tenRightM##i = vec_sro(tenRightM##i, eightLeft);                    \
        extractPermM##i = vec_add(extractPermM##i, extractPermInc)
    
    #define ITER(i, j, k)                           \
    
        F_INIT(i);                                  \
        F2(i, j, k, 0);                             \
        F2(i, j, k, 1);                             \
        F2(i, j, k, 2);                             \
        F2(i, j, k, 3);                             \
        F2(i, j, k, 4);                             \
        F2(i, j, k, 5);                             \
        F2(i, j, k, 6);                             \
        F2(i, j, k, 7)
    
        ITER(0, 1, 2);
        ITER(1, 2, 3);
        ITER(2, 3, 4);
        ITER(3, 4, 5);
        ITER(4, 5, 6);
        ITER(5, 6, 7);
        ITER(6, 7, 8);
        ITER(7, 8, 9);
    
        const vector signed char neg1 = vec_splat_s8(-1);
    
    #define STORE_LINE(i)                                   \
    
        const vector unsigned char permST##i =              \
            vec_lvsr(i * stride, srcCopy);                  \
        const vector unsigned char maskST##i =              \
            vec_perm((vector unsigned char)zero,            \
                     (vector unsigned char)neg1, permST##i);\
        src##i = vec_perm(src##i ,src##i, permST##i);       \
        sA##i= vec_sel(sA##i, src##i, maskST##i);           \
        sB##i= vec_sel(src##i, sB##i, maskST##i);           \
        vec_st(sA##i, i * stride, srcCopy);                 \
        vec_st(sB##i, i * stride + 16, srcCopy)
    
        STORE_LINE(1);
        STORE_LINE(2);
        STORE_LINE(3);
        STORE_LINE(4);
        STORE_LINE(5);
        STORE_LINE(6);
        STORE_LINE(7);
        STORE_LINE(8);
    
    
    #undef STORE_LINE
    #undef ITER
    #undef F2
    }
    
    #define doHorizLowPass_altivec(a...) doHorizLowPass_C(a)
    #define doHorizDefFilter_altivec(a...) doHorizDefFilter_C(a)
    
    #define do_a_deblock_altivec(a...) do_a_deblock_C(a)
    
    static inline void RENAME(tempNoiseReducer)(uint8_t *src, int stride,
    
                                                uint8_t *tempBlurred, uint32_t *tempBlurredPast, int *maxNoise)
    
        const vector signed int zero = vec_splat_s32(0);
        const vector signed short vsint16_1 = vec_splat_s16(1);
        vector signed int v_dp = zero;
        vector signed int v_sysdp = zero;
        int d, sysd, i;
    
        tempBlurredPast[127]= maxNoise[0];
        tempBlurredPast[128]= maxNoise[1];
        tempBlurredPast[129]= maxNoise[2];
    
    #define LOAD_LINE(src, i)                                               \
    
        register int j##src##i = i * stride;                                \
        vector unsigned char perm##src##i = vec_lvsl(j##src##i, src);       \
        const vector unsigned char v_##src##A1##i = vec_ld(j##src##i, src); \
        const vector unsigned char v_##src##A2##i = vec_ld(j##src##i + 16, src); \
        const vector unsigned char v_##src##A##i =                          \
            vec_perm(v_##src##A1##i, v_##src##A2##i, perm##src##i);         \
        vector signed short v_##src##Ass##i =                               \
            (vector signed short)vec_mergeh((vector signed char)zero,       \
                                            (vector signed char)v_##src##A##i)
    
        LOAD_LINE(src, 0);
        LOAD_LINE(src, 1);
        LOAD_LINE(src, 2);
        LOAD_LINE(src, 3);
        LOAD_LINE(src, 4);
        LOAD_LINE(src, 5);
        LOAD_LINE(src, 6);
        LOAD_LINE(src, 7);
    
    
        LOAD_LINE(tempBlurred, 0);
        LOAD_LINE(tempBlurred, 1);
        LOAD_LINE(tempBlurred, 2);
        LOAD_LINE(tempBlurred, 3);
        LOAD_LINE(tempBlurred, 4);
        LOAD_LINE(tempBlurred, 5);
        LOAD_LINE(tempBlurred, 6);
        LOAD_LINE(tempBlurred, 7);
    
    #define ACCUMULATE_DIFFS(i)                                     \
    
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        vector signed short v_d##i = vec_sub(v_tempBlurredAss##i,   \
    
                                             v_srcAss##i);          \
        v_dp = vec_msums(v_d##i, v_d##i, v_dp);                     \
        v_sysdp = vec_msums(v_d##i, vsint16_1, v_sysdp)
    
        ACCUMULATE_DIFFS(0);
        ACCUMULATE_DIFFS(1);
        ACCUMULATE_DIFFS(2);
        ACCUMULATE_DIFFS(3);
        ACCUMULATE_DIFFS(4);
        ACCUMULATE_DIFFS(5);
        ACCUMULATE_DIFFS(6);
        ACCUMULATE_DIFFS(7);
    
        v_dp = vec_sums(v_dp, zero);
        v_sysdp = vec_sums(v_sysdp, zero);
    
        v_dp = vec_splat(v_dp, 3);
        v_sysdp = vec_splat(v_sysdp, 3);
    
        vec_ste(v_dp, 0, &d);
        vec_ste(v_sysdp, 0, &sysd);
    
             +(*(tempBlurredPast-256))
             +(*(tempBlurredPast-1))+ (*(tempBlurredPast+1))
             +(*(tempBlurredPast+256))
    
        *tempBlurredPast=i;
    
        if (d > maxNoise[1]) {
            if (d < maxNoise[2]) {
    
    #define OP(i) v_tempBlurredAss##i = vec_avg(v_tempBlurredAss##i, v_srcAss##i);
    
    #define OP(i) v_tempBlurredAss##i = v_srcAss##i;
    
            }
        } else {
            if (d < maxNoise[0]) {
                const vector signed short vsint16_7 = vec_splat_s16(7);
                const vector signed short vsint16_4 = vec_splat_s16(4);
                const vector unsigned short vuint16_3 = vec_splat_u16(3);
    
                const vector signed short v_temp##i =               \
    
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                    vec_mladd(v_tempBlurredAss##i,                  \
    
                              vsint16_7, v_srcAss##i);              \
                const vector signed short v_temp2##i =              \
                    vec_add(v_temp##i, vsint16_4);                  \
    
                v_tempBlurredAss##i = vec_sr(v_temp2##i, vuint16_3)
    
            } else {
                const vector signed short vsint16_3 = vec_splat_s16(3);
                const vector signed short vsint16_2 = vec_splat_s16(2);
    
                const vector signed short v_temp##i =               \
    
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                    vec_mladd(v_tempBlurredAss##i,                  \
    
                              vsint16_3, v_srcAss##i);              \
                const vector signed short v_temp2##i =              \
                    vec_add(v_temp##i, vsint16_2);                  \
    
                v_tempBlurredAss##i = vec_sr(v_temp2##i, (vector unsigned short)vsint16_2)
    
        const vector signed char neg1 = vec_splat_s8(-1);
    
        const vector unsigned char permHH = (const vector unsigned char){0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                                                                         0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F};
    
    
    #define PACK_AND_STORE(src, i)                                  \
    
        const vector unsigned char perms##src##i =                  \
            vec_lvsr(i * stride, src);                              \
        const vector unsigned char vf##src##i =                     \
    
            vec_packsu(v_tempBlurredAss##i, (vector signed short)zero); \
    
        const vector unsigned char vg##src##i =                     \
            vec_perm(vf##src##i, v_##src##A##i, permHH);            \
        const vector unsigned char mask##src##i =                   \
            vec_perm((vector unsigned char)zero, (vector unsigned char)neg1, perms##src##i); \
        const vector unsigned char vg2##src##i =                    \
            vec_perm(vg##src##i, vg##src##i, perms##src##i);        \
        const vector unsigned char svA##src##i =                    \
            vec_sel(v_##src##A1##i, vg2##src##i, mask##src##i);     \
        const vector unsigned char svB##src##i =                    \
            vec_sel(vg2##src##i, v_##src##A2##i, mask##src##i);     \
        vec_st(svA##src##i, i * stride, src);                       \