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ffmpeg / libswscale / ppc / swscale_altivec_template.c @ 5a55d5b5

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/*
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 * AltiVec-enhanced yuv2yuvX
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 *
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 * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
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 * based on the equivalent C code in swscale.c
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#define vzero vec_splat_s32(0)
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static inline void
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altivec_packIntArrayToCharArray(int *val, uint8_t* dest, int dstW)
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{
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    register int i;
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    vector unsigned int altivec_vectorShiftInt19 =
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        vec_add(vec_splat_u32(10), vec_splat_u32(9));
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    if ((unsigned long)dest % 16) {
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        /* badly aligned store, we force store alignment */
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        /* and will handle load misalignment on val w/ vec_perm */
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        vector unsigned char perm1;
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        vector signed int v1;
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        for (i = 0 ; (i < dstW) &&
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            (((unsigned long)dest + i) % 16) ; i++) {
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                int t = val[i] >> 19;
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                dest[i] = (t < 0) ? 0 : ((t > 255) ? 255 : t);
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        }
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        perm1 = vec_lvsl(i << 2, val);
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        v1 = vec_ld(i << 2, val);
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        for ( ; i < (dstW - 15); i+=16) {
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            int offset = i << 2;
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            vector signed int v2 = vec_ld(offset + 16, val);
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            vector signed int v3 = vec_ld(offset + 32, val);
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            vector signed int v4 = vec_ld(offset + 48, val);
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            vector signed int v5 = vec_ld(offset + 64, val);
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            vector signed int v12 = vec_perm(v1, v2, perm1);
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            vector signed int v23 = vec_perm(v2, v3, perm1);
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            vector signed int v34 = vec_perm(v3, v4, perm1);
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            vector signed int v45 = vec_perm(v4, v5, perm1);
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            vector signed int vA = vec_sra(v12, altivec_vectorShiftInt19);
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            vector signed int vB = vec_sra(v23, altivec_vectorShiftInt19);
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            vector signed int vC = vec_sra(v34, altivec_vectorShiftInt19);
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            vector signed int vD = vec_sra(v45, altivec_vectorShiftInt19);
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            vector unsigned short vs1 = vec_packsu(vA, vB);
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            vector unsigned short vs2 = vec_packsu(vC, vD);
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            vector unsigned char vf = vec_packsu(vs1, vs2);
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            vec_st(vf, i, dest);
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            v1 = v5;
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        }
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    } else { // dest is properly aligned, great
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        for (i = 0; i < (dstW - 15); i+=16) {
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            int offset = i << 2;
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            vector signed int v1 = vec_ld(offset, val);
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            vector signed int v2 = vec_ld(offset + 16, val);
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            vector signed int v3 = vec_ld(offset + 32, val);
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            vector signed int v4 = vec_ld(offset + 48, val);
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            vector signed int v5 = vec_sra(v1, altivec_vectorShiftInt19);
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            vector signed int v6 = vec_sra(v2, altivec_vectorShiftInt19);
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            vector signed int v7 = vec_sra(v3, altivec_vectorShiftInt19);
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            vector signed int v8 = vec_sra(v4, altivec_vectorShiftInt19);
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            vector unsigned short vs1 = vec_packsu(v5, v6);
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            vector unsigned short vs2 = vec_packsu(v7, v8);
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            vector unsigned char vf = vec_packsu(vs1, vs2);
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            vec_st(vf, i, dest);
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        }
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    }
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    for ( ; i < dstW ; i++) {
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        int t = val[i] >> 19;
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        dest[i] = (t < 0) ? 0 : ((t > 255) ? 255 : t);
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    }
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}
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static inline void
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yuv2yuvX_altivec_real(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
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                      const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
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                      uint8_t *dest, uint8_t *uDest, uint8_t *vDest, int dstW, int chrDstW)
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{
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    const vector signed int vini = {(1 << 18), (1 << 18), (1 << 18), (1 << 18)};
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    register int i, j;
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    {
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        DECLARE_ALIGNED(16, int, val)[dstW];
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        for (i = 0; i < (dstW -7); i+=4) {
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            vec_st(vini, i << 2, val);
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        }
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        for (; i < dstW; i++) {
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            val[i] = (1 << 18);
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        }
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        for (j = 0; j < lumFilterSize; j++) {
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            vector signed short l1, vLumFilter = vec_ld(j << 1, lumFilter);
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            vector unsigned char perm, perm0 = vec_lvsl(j << 1, lumFilter);
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            vLumFilter = vec_perm(vLumFilter, vLumFilter, perm0);
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            vLumFilter = vec_splat(vLumFilter, 0); // lumFilter[j] is loaded 8 times in vLumFilter
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111
            perm = vec_lvsl(0, lumSrc[j]);
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            l1 = vec_ld(0, lumSrc[j]);
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114
            for (i = 0; i < (dstW - 7); i+=8) {
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                int offset = i << 2;
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                vector signed short l2 = vec_ld((i << 1) + 16, lumSrc[j]);
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118
                vector signed int v1 = vec_ld(offset, val);
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                vector signed int v2 = vec_ld(offset + 16, val);
120

    
121
                vector signed short ls = vec_perm(l1, l2, perm); // lumSrc[j][i] ... lumSrc[j][i+7]
122

    
123
                vector signed int i1 = vec_mule(vLumFilter, ls);
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                vector signed int i2 = vec_mulo(vLumFilter, ls);
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126
                vector signed int vf1 = vec_mergeh(i1, i2);
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                vector signed int vf2 = vec_mergel(i1, i2); // lumSrc[j][i] * lumFilter[j] ... lumSrc[j][i+7] * lumFilter[j]
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129
                vector signed int vo1 = vec_add(v1, vf1);
130
                vector signed int vo2 = vec_add(v2, vf2);
131

    
132
                vec_st(vo1, offset, val);
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                vec_st(vo2, offset + 16, val);
134

    
135
                l1 = l2;
136
            }
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            for ( ; i < dstW; i++) {
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                val[i] += lumSrc[j][i] * lumFilter[j];
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            }
140
        }
141
        altivec_packIntArrayToCharArray(val, dest, dstW);
142
    }
143
    if (uDest != 0) {
144
        DECLARE_ALIGNED(16, int, u)[chrDstW];
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        DECLARE_ALIGNED(16, int, v)[chrDstW];
146

    
147
        for (i = 0; i < (chrDstW -7); i+=4) {
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            vec_st(vini, i << 2, u);
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            vec_st(vini, i << 2, v);
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        }
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        for (; i < chrDstW; i++) {
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            u[i] = (1 << 18);
153
            v[i] = (1 << 18);
154
        }
155

    
156
        for (j = 0; j < chrFilterSize; j++) {
157
            vector signed short l1, l1_V, vChrFilter = vec_ld(j << 1, chrFilter);
158
            vector unsigned char perm, perm0 = vec_lvsl(j << 1, chrFilter);
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            vChrFilter = vec_perm(vChrFilter, vChrFilter, perm0);
160
            vChrFilter = vec_splat(vChrFilter, 0); // chrFilter[j] is loaded 8 times in vChrFilter
161

    
162
            perm = vec_lvsl(0, chrSrc[j]);
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            l1 = vec_ld(0, chrSrc[j]);
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            l1_V = vec_ld(2048 << 1, chrSrc[j]);
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166
            for (i = 0; i < (chrDstW - 7); i+=8) {
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                int offset = i << 2;
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                vector signed short l2 = vec_ld((i << 1) + 16, chrSrc[j]);
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                vector signed short l2_V = vec_ld(((i + 2048) << 1) + 16, chrSrc[j]);
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171
                vector signed int v1 = vec_ld(offset, u);
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                vector signed int v2 = vec_ld(offset + 16, u);
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                vector signed int v1_V = vec_ld(offset, v);
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                vector signed int v2_V = vec_ld(offset + 16, v);
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176
                vector signed short ls = vec_perm(l1, l2, perm); // chrSrc[j][i] ... chrSrc[j][i+7]
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                vector signed short ls_V = vec_perm(l1_V, l2_V, perm); // chrSrc[j][i+2048] ... chrSrc[j][i+2055]
178

    
179
                vector signed int i1 = vec_mule(vChrFilter, ls);
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                vector signed int i2 = vec_mulo(vChrFilter, ls);
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                vector signed int i1_V = vec_mule(vChrFilter, ls_V);
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                vector signed int i2_V = vec_mulo(vChrFilter, ls_V);
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184
                vector signed int vf1 = vec_mergeh(i1, i2);
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                vector signed int vf2 = vec_mergel(i1, i2); // chrSrc[j][i] * chrFilter[j] ... chrSrc[j][i+7] * chrFilter[j]
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                vector signed int vf1_V = vec_mergeh(i1_V, i2_V);
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                vector signed int vf2_V = vec_mergel(i1_V, i2_V); // chrSrc[j][i] * chrFilter[j] ... chrSrc[j][i+7] * chrFilter[j]
188

    
189
                vector signed int vo1 = vec_add(v1, vf1);
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                vector signed int vo2 = vec_add(v2, vf2);
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                vector signed int vo1_V = vec_add(v1_V, vf1_V);
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                vector signed int vo2_V = vec_add(v2_V, vf2_V);
193

    
194
                vec_st(vo1, offset, u);
195
                vec_st(vo2, offset + 16, u);
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                vec_st(vo1_V, offset, v);
197
                vec_st(vo2_V, offset + 16, v);
198

    
199
                l1 = l2;
200
                l1_V = l2_V;
201
            }
202
            for ( ; i < chrDstW; i++) {
203
                u[i] += chrSrc[j][i] * chrFilter[j];
204
                v[i] += chrSrc[j][i + 2048] * chrFilter[j];
205
            }
206
        }
207
        altivec_packIntArrayToCharArray(u, uDest, chrDstW);
208
        altivec_packIntArrayToCharArray(v, vDest, chrDstW);
209
    }
210
}
211

    
212
static inline void hScale_altivec_real(int16_t *dst, int dstW,
213
                                       const uint8_t *src, int srcW,
214
                                       int xInc, const int16_t *filter,
215
                                       const int16_t *filterPos, int filterSize)
216
{
217
    register int i;
218
    DECLARE_ALIGNED(16, int, tempo)[4];
219

    
220
    if (filterSize % 4) {
221
        for (i=0; i<dstW; i++) {
222
            register int j;
223
            register int srcPos = filterPos[i];
224
            register int val = 0;
225
            for (j=0; j<filterSize; j++) {
226
                val += ((int)src[srcPos + j])*filter[filterSize*i + j];
227
            }
228
            dst[i] = FFMIN(val>>7, (1<<15)-1);
229
        }
230
    }
231
    else
232
    switch (filterSize) {
233
    case 4:
234
    {
235
    for (i=0; i<dstW; i++) {
236
        register int srcPos = filterPos[i];
237

    
238
        vector unsigned char src_v0 = vec_ld(srcPos, src);
239
        vector unsigned char src_v1, src_vF;
240
        vector signed short src_v, filter_v;
241
        vector signed int val_vEven, val_s;
242
        if ((((int)src + srcPos)% 16) > 12) {
243
            src_v1 = vec_ld(srcPos + 16, src);
244
        }
245
        src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
246

    
247
        src_v = // vec_unpackh sign-extends...
248
            (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
249
        // now put our elements in the even slots
250
        src_v = vec_mergeh(src_v, (vector signed short)vzero);
251

    
252
        filter_v = vec_ld(i << 3, filter);
253
        // The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2).
254

    
255
        // The neat trick: We only care for half the elements,
256
        // high or low depending on (i<<3)%16 (it's 0 or 8 here),
257
        // and we're going to use vec_mule, so we choose
258
        // carefully how to "unpack" the elements into the even slots.
259
        if ((i << 3) % 16)
260
            filter_v = vec_mergel(filter_v, (vector signed short)vzero);
261
        else
262
            filter_v = vec_mergeh(filter_v, (vector signed short)vzero);
263

    
264
        val_vEven = vec_mule(src_v, filter_v);
265
        val_s = vec_sums(val_vEven, vzero);
266
        vec_st(val_s, 0, tempo);
267
        dst[i] = FFMIN(tempo[3]>>7, (1<<15)-1);
268
    }
269
    }
270
    break;
271

    
272
    case 8:
273
    {
274
    for (i=0; i<dstW; i++) {
275
        register int srcPos = filterPos[i];
276

    
277
        vector unsigned char src_v0 = vec_ld(srcPos, src);
278
        vector unsigned char src_v1, src_vF;
279
        vector signed short src_v, filter_v;
280
        vector signed int val_v, val_s;
281
        if ((((int)src + srcPos)% 16) > 8) {
282
            src_v1 = vec_ld(srcPos + 16, src);
283
        }
284
        src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
285

    
286
        src_v = // vec_unpackh sign-extends...
287
            (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
288
        filter_v = vec_ld(i << 4, filter);
289
        // the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2)
290

    
291
        val_v = vec_msums(src_v, filter_v, (vector signed int)vzero);
292
        val_s = vec_sums(val_v, vzero);
293
        vec_st(val_s, 0, tempo);
294
        dst[i] = FFMIN(tempo[3]>>7, (1<<15)-1);
295
    }
296
    }
297
    break;
298

    
299
    case 16:
300
    {
301
        for (i=0; i<dstW; i++) {
302
            register int srcPos = filterPos[i];
303

    
304
            vector unsigned char src_v0 = vec_ld(srcPos, src);
305
            vector unsigned char src_v1 = vec_ld(srcPos + 16, src);
306
            vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
307

    
308
            vector signed short src_vA = // vec_unpackh sign-extends...
309
                (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
310
            vector signed short src_vB = // vec_unpackh sign-extends...
311
                (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
312

    
313
            vector signed short filter_v0 = vec_ld(i << 5, filter);
314
            vector signed short filter_v1 = vec_ld((i << 5) + 16, filter);
315
            // the 5 above are 4 (filterSize == 16) + 1 (sizeof(short) == 2)
316

    
317
            vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero);
318
            vector signed int val_v = vec_msums(src_vB, filter_v1, val_acc);
319

    
320
            vector signed int val_s = vec_sums(val_v, vzero);
321

    
322
            vec_st(val_s, 0, tempo);
323
            dst[i] = FFMIN(tempo[3]>>7, (1<<15)-1);
324
        }
325
    }
326
    break;
327

    
328
    default:
329
    {
330
    for (i=0; i<dstW; i++) {
331
        register int j;
332
        register int srcPos = filterPos[i];
333

    
334
        vector signed int val_s, val_v = (vector signed int)vzero;
335
        vector signed short filter_v0R = vec_ld(i * 2 * filterSize, filter);
336
        vector unsigned char permF = vec_lvsl((i * 2 * filterSize), filter);
337

    
338
        vector unsigned char src_v0 = vec_ld(srcPos, src);
339
        vector unsigned char permS = vec_lvsl(srcPos, src);
340

    
341
        for (j = 0 ; j < filterSize - 15; j += 16) {
342
            vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src);
343
            vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS);
344

    
345
            vector signed short src_vA = // vec_unpackh sign-extends...
346
                (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
347
            vector signed short src_vB = // vec_unpackh sign-extends...
348
                (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
349

    
350
            vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
351
            vector signed short filter_v2R = vec_ld((i * 2 * filterSize) + (j * 2) + 32, filter);
352
            vector signed short filter_v0  = vec_perm(filter_v0R, filter_v1R, permF);
353
            vector signed short filter_v1  = vec_perm(filter_v1R, filter_v2R, permF);
354

    
355
            vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v);
356
            val_v = vec_msums(src_vB, filter_v1, val_acc);
357

    
358
            filter_v0R = filter_v2R;
359
            src_v0 = src_v1;
360
        }
361

    
362
        if (j < filterSize-7) {
363
            // loading src_v0 is useless, it's already done above
364
            //vector unsigned char src_v0 = vec_ld(srcPos + j, src);
365
            vector unsigned char src_v1, src_vF;
366
            vector signed short src_v, filter_v1R, filter_v;
367
            if ((((int)src + srcPos)% 16) > 8) {
368
                src_v1 = vec_ld(srcPos + j + 16, src);
369
            }
370
            src_vF = vec_perm(src_v0, src_v1, permS);
371

    
372
            src_v = // vec_unpackh sign-extends...
373
                (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
374
            // loading filter_v0R is useless, it's already done above
375
            //vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter);
376
            filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
377
            filter_v = vec_perm(filter_v0R, filter_v1R, permF);
378

    
379
            val_v = vec_msums(src_v, filter_v, val_v);
380
        }
381

    
382
        val_s = vec_sums(val_v, vzero);
383

    
384
        vec_st(val_s, 0, tempo);
385
        dst[i] = FFMIN(tempo[3]>>7, (1<<15)-1);
386
    }
387

    
388
    }
389
    }
390
}
391

    
392
static inline int yv12toyuy2_unscaled_altivec(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
393
                                              int srcSliceH, uint8_t* dstParam[], int dstStride_a[])
394
{
395
    uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY;
396
    // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);
397
    const uint8_t *ysrc = src[0];
398
    const uint8_t *usrc = src[1];
399
    const uint8_t *vsrc = src[2];
400
    const int width = c->srcW;
401
    const int height = srcSliceH;
402
    const int lumStride = srcStride[0];
403
    const int chromStride = srcStride[1];
404
    const int dstStride = dstStride_a[0];
405
    const vector unsigned char yperm = vec_lvsl(0, ysrc);
406
    const int vertLumPerChroma = 2;
407
    register unsigned int y;
408

    
409
    if (width&15) {
410
        yv12toyuy2(ysrc, usrc, vsrc, dst, c->srcW, srcSliceH, lumStride, chromStride, dstStride);
411
        return srcSliceH;
412
    }
413

    
414
    /* This code assumes:
415

416
    1) dst is 16 bytes-aligned
417
    2) dstStride is a multiple of 16
418
    3) width is a multiple of 16
419
    4) lum & chrom stride are multiples of 8
420
    */
421

    
422
    for (y=0; y<height; y++) {
423
        int i;
424
        for (i = 0; i < width - 31; i+= 32) {
425
            const unsigned int j = i >> 1;
426
            vector unsigned char v_yA = vec_ld(i, ysrc);
427
            vector unsigned char v_yB = vec_ld(i + 16, ysrc);
428
            vector unsigned char v_yC = vec_ld(i + 32, ysrc);
429
            vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
430
            vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
431
            vector unsigned char v_uA = vec_ld(j, usrc);
432
            vector unsigned char v_uB = vec_ld(j + 16, usrc);
433
            vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
434
            vector unsigned char v_vA = vec_ld(j, vsrc);
435
            vector unsigned char v_vB = vec_ld(j + 16, vsrc);
436
            vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
437
            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
438
            vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
439
            vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
440
            vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
441
            vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b);
442
            vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b);
443
            vec_st(v_yuy2_0, (i << 1), dst);
444
            vec_st(v_yuy2_1, (i << 1) + 16, dst);
445
            vec_st(v_yuy2_2, (i << 1) + 32, dst);
446
            vec_st(v_yuy2_3, (i << 1) + 48, dst);
447
        }
448
        if (i < width) {
449
            const unsigned int j = i >> 1;
450
            vector unsigned char v_y1 = vec_ld(i, ysrc);
451
            vector unsigned char v_u = vec_ld(j, usrc);
452
            vector unsigned char v_v = vec_ld(j, vsrc);
453
            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
454
            vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
455
            vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
456
            vec_st(v_yuy2_0, (i << 1), dst);
457
            vec_st(v_yuy2_1, (i << 1) + 16, dst);
458
        }
459
        if ((y&(vertLumPerChroma-1)) == vertLumPerChroma-1) {
460
            usrc += chromStride;
461
            vsrc += chromStride;
462
        }
463
        ysrc += lumStride;
464
        dst += dstStride;
465
    }
466

    
467
    return srcSliceH;
468
}
469

    
470
static inline int yv12touyvy_unscaled_altivec(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
471
                                              int srcSliceH, uint8_t* dstParam[], int dstStride_a[])
472
{
473
    uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY;
474
    // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);
475
    const uint8_t *ysrc = src[0];
476
    const uint8_t *usrc = src[1];
477
    const uint8_t *vsrc = src[2];
478
    const int width = c->srcW;
479
    const int height = srcSliceH;
480
    const int lumStride = srcStride[0];
481
    const int chromStride = srcStride[1];
482
    const int dstStride = dstStride_a[0];
483
    const int vertLumPerChroma = 2;
484
    const vector unsigned char yperm = vec_lvsl(0, ysrc);
485
    register unsigned int y;
486

    
487
    if (width&15) {
488
        yv12touyvy(ysrc, usrc, vsrc, dst, c->srcW, srcSliceH, lumStride, chromStride, dstStride);
489
        return srcSliceH;
490
    }
491

    
492
    /* This code assumes:
493

494
    1) dst is 16 bytes-aligned
495
    2) dstStride is a multiple of 16
496
    3) width is a multiple of 16
497
    4) lum & chrom stride are multiples of 8
498
    */
499

    
500
    for (y=0; y<height; y++) {
501
        int i;
502
        for (i = 0; i < width - 31; i+= 32) {
503
            const unsigned int j = i >> 1;
504
            vector unsigned char v_yA = vec_ld(i, ysrc);
505
            vector unsigned char v_yB = vec_ld(i + 16, ysrc);
506
            vector unsigned char v_yC = vec_ld(i + 32, ysrc);
507
            vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
508
            vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
509
            vector unsigned char v_uA = vec_ld(j, usrc);
510
            vector unsigned char v_uB = vec_ld(j + 16, usrc);
511
            vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
512
            vector unsigned char v_vA = vec_ld(j, vsrc);
513
            vector unsigned char v_vB = vec_ld(j + 16, vsrc);
514
            vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
515
            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
516
            vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
517
            vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
518
            vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
519
            vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2);
520
            vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2);
521
            vec_st(v_uyvy_0, (i << 1), dst);
522
            vec_st(v_uyvy_1, (i << 1) + 16, dst);
523
            vec_st(v_uyvy_2, (i << 1) + 32, dst);
524
            vec_st(v_uyvy_3, (i << 1) + 48, dst);
525
        }
526
        if (i < width) {
527
            const unsigned int j = i >> 1;
528
            vector unsigned char v_y1 = vec_ld(i, ysrc);
529
            vector unsigned char v_u = vec_ld(j, usrc);
530
            vector unsigned char v_v = vec_ld(j, vsrc);
531
            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
532
            vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
533
            vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
534
            vec_st(v_uyvy_0, (i << 1), dst);
535
            vec_st(v_uyvy_1, (i << 1) + 16, dst);
536
        }
537
        if ((y&(vertLumPerChroma-1)) == vertLumPerChroma-1) {
538
            usrc += chromStride;
539
            vsrc += chromStride;
540
        }
541
        ysrc += lumStride;
542
        dst += dstStride;
543
    }
544
    return srcSliceH;
545
}