ffmpeg / libswscale / swscale_altivec_template.c @ 8a322796
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/*


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* AltiVecenhanced 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 modify

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* it under the terms of the GNU General Public License as published by

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* the Free Software Foundation; either version 2 of the License, or

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* (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

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* GNU General Public License for more details.

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*

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* You should have received a copy of the GNU General Public License

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* along with FFmpeg; if not, write to the Free Software

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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 021101301 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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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(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

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int16_t *chrFilter, 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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int __attribute__ ((aligned (16))) 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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perm = vec_lvsl(0, lumSrc[j]);

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l1 = vec_ld(0, lumSrc[j]);

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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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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 short ls = vec_perm(l1, l2, perm); // lumSrc[j][i] ... lumSrc[j][i+7] 
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vector signed int i1 = vec_mule(vLumFilter, ls); 
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vector signed int i2 = vec_mulo(vLumFilter, ls); 
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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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vector signed int vo1 = vec_add(v1, vf1); 
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vector signed int vo2 = vec_add(v2, vf2); 
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vec_st(vo1, offset, val); 
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vec_st(vo2, offset + 16, val);

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l1 = l2; 
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} 
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for ( ; i < dstW; i++) {

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val[i] += lumSrc[j][i] * lumFilter[j]; 
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} 
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} 
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altivec_packIntArrayToCharArray(val, dest, dstW); 
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} 
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if (uDest != 0) { 
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int __attribute__ ((aligned (16))) u[chrDstW]; 
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int __attribute__ ((aligned (16))) v[chrDstW]; 
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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); 
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v[i] = (1 << 18); 
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} 
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for (j = 0; j < chrFilterSize; j++) { 
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vector signed short l1, l1_V, vChrFilter = vec_ld(j << 1, chrFilter); 
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vector unsigned char perm, perm0 = vec_lvsl(j << 1, chrFilter); 
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vChrFilter = vec_perm(vChrFilter, vChrFilter, perm0); 
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vChrFilter = vec_splat(vChrFilter, 0); // chrFilter[j] is loaded 8 times in vChrFilter 
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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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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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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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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] 
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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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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] 
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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); 
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vec_st(vo1, offset, u); 
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vec_st(vo2, offset + 16, u);

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vec_st(vo1_V, offset, v); 
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vec_st(vo2_V, offset + 16, v);

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l1 = l2; 
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l1_V = l2_V; 
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} 
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for ( ; i < chrDstW; i++) {

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u[i] += chrSrc[j][i] * chrFilter[j]; 
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v[i] += chrSrc[j][i + 2048] * chrFilter[j];

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} 
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} 
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altivec_packIntArrayToCharArray(u, uDest, chrDstW); 
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altivec_packIntArrayToCharArray(v, vDest, chrDstW); 
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} 
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} 
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static inline void hScale_altivec_real(int16_t *dst, int dstW, uint8_t *src, int srcW, int xInc, int16_t *filter, int16_t *filterPos, int filterSize) { 
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register int i; 
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int __attribute__ ((aligned (16))) tempo[4]; 
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if (filterSize % 4) { 
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for (i=0; i<dstW; i++) { 
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register int j; 
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register int srcPos = filterPos[i]; 
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register int val = 0; 
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for (j=0; j<filterSize; j++) { 
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val += ((int)src[srcPos + j])*filter[filterSize*i + j];

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} 
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dst[i] = av_clip(val>>7, 0, (1<<15)1); 
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} 
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} 
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else

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switch (filterSize) {

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case 4: 
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{ 
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for (i=0; i<dstW; i++) { 
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register int srcPos = filterPos[i]; 
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vector unsigned char src_v0 = vec_ld(srcPos, src); 
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vector unsigned char src_v1, src_vF; 
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vector signed short src_v, filter_v; 
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vector signed int val_vEven, val_s; 
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if ((((int)src + srcPos)% 16) > 12) { 
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src_v1 = vec_ld(srcPos + 16, src);

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} 
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src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); 
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src_v = // vec_unpackh signextends...

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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); 
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// now put our elements in the even slots

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src_v = vec_mergeh(src_v, (vector signed short)vzero); 
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filter_v = vec_ld(i << 3, filter);

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// The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2).

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// The neat trick: We only care for half the elements,

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// high or low depending on (i<<3)%16 (it's 0 or 8 here),

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// and we're going to use vec_mule, so we choose

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// carefully how to "unpack" the elements into the even slots.

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if ((i << 3) % 16) 
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filter_v = vec_mergel(filter_v, (vector signed short)vzero); 
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else

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filter_v = vec_mergeh(filter_v, (vector signed short)vzero); 
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val_vEven = vec_mule(src_v, filter_v); 
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val_s = vec_sums(val_vEven, vzero); 
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vec_st(val_s, 0, tempo);

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dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)1); 
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} 
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} 
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break;

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case 8: 
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{ 
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for (i=0; i<dstW; i++) { 
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register int srcPos = filterPos[i]; 
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vector unsigned char src_v0 = vec_ld(srcPos, src); 
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vector unsigned char src_v1, src_vF; 
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vector signed short src_v, filter_v; 
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vector signed int val_v, val_s; 
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if ((((int)src + srcPos)% 16) > 8) { 
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src_v1 = vec_ld(srcPos + 16, src);

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} 
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src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); 
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src_v = // vec_unpackh signextends...

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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); 
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filter_v = vec_ld(i << 4, filter);

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// the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2)

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val_v = vec_msums(src_v, filter_v, (vector signed int)vzero); 
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val_s = vec_sums(val_v, vzero); 
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vec_st(val_s, 0, tempo);

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dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)1); 
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} 
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} 
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break;

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case 16: 
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{ 
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for (i=0; i<dstW; i++) { 
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register int srcPos = filterPos[i]; 
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vector unsigned char src_v0 = vec_ld(srcPos, src); 
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vector unsigned char src_v1 = vec_ld(srcPos + 16, src); 
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vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); 
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vector signed short src_vA = // vec_unpackh signextends... 
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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); 
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vector signed short src_vB = // vec_unpackh signextends... 
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(vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF)); 
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vector signed short filter_v0 = vec_ld(i << 5, filter); 
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vector signed short filter_v1 = vec_ld((i << 5) + 16, filter); 
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// the 5 above are 4 (filterSize == 16) + 1 (sizeof(short) == 2)

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vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero); 
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vector signed int val_v = vec_msums(src_vB, filter_v1, val_acc); 
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vector signed int val_s = vec_sums(val_v, vzero); 
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vec_st(val_s, 0, tempo);

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dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)1); 
319 
} 
320 
} 
321 
break;

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default:

324 
{ 
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for (i=0; i<dstW; i++) { 
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register int j; 
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register int srcPos = filterPos[i]; 
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vector signed int val_s, val_v = (vector signed int)vzero; 
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vector signed short filter_v0R = vec_ld(i * 2 * filterSize, filter); 
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vector unsigned char permF = vec_lvsl((i * 2 * filterSize), filter); 
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vector unsigned char src_v0 = vec_ld(srcPos, src); 
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vector unsigned char permS = vec_lvsl(srcPos, src); 
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for (j = 0 ; j < filterSize  15; j += 16) { 
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vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src); 
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vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS); 
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vector signed short src_vA = // vec_unpackh signextends... 
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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); 
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vector signed short src_vB = // vec_unpackh signextends... 
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(vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF)); 
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vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); 
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vector signed short filter_v2R = vec_ld((i * 2 * filterSize) + (j * 2) + 32, filter); 
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vector signed short filter_v0 = vec_perm(filter_v0R, filter_v1R, permF); 
348 
vector signed short filter_v1 = vec_perm(filter_v1R, filter_v2R, permF); 
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350 
vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v); 
351 
val_v = vec_msums(src_vB, filter_v1, val_acc); 
352  
353 
filter_v0R = filter_v2R; 
354 
src_v0 = src_v1; 
355 
} 
356  
357 
if (j < filterSize7) { 
358 
// loading src_v0 is useless, it's already done above

359 
//vector unsigned char src_v0 = vec_ld(srcPos + j, src);

360 
vector unsigned char src_v1, src_vF; 
361 
vector signed short src_v, filter_v1R, filter_v; 
362 
if ((((int)src + srcPos)% 16) > 8) { 
363 
src_v1 = vec_ld(srcPos + j + 16, src);

364 
} 
365 
src_vF = vec_perm(src_v0, src_v1, permS); 
366  
367 
src_v = // vec_unpackh signextends...

368 
(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); 
369 
// loading filter_v0R is useless, it's already done above

370 
//vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter);

371 
filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); 
372 
filter_v = vec_perm(filter_v0R, filter_v1R, permF); 
373  
374 
val_v = vec_msums(src_v, filter_v, val_v); 
375 
} 
376  
377 
val_s = vec_sums(val_v, vzero); 
378  
379 
vec_st(val_s, 0, tempo);

380 
dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)1); 
381 
} 
382  
383 
} 
384 
} 
385 
} 
386  
387 
static inline int yv12toyuy2_unscaled_altivec(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY, 
388 
int srcSliceH, uint8_t* dstParam[], int dstStride_a[]) { 
389 
uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY; 
390 
// yv12toyuy2(src[0], src[1], src[2], dst, c>srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

391 
uint8_t *ysrc = src[0];

392 
uint8_t *usrc = src[1];

393 
uint8_t *vsrc = src[2];

394 
const int width = c>srcW; 
395 
const int height = srcSliceH; 
396 
const int lumStride = srcStride[0]; 
397 
const int chromStride = srcStride[1]; 
398 
const int dstStride = dstStride_a[0]; 
399 
const vector unsigned char yperm = vec_lvsl(0, ysrc); 
400 
const int vertLumPerChroma = 2; 
401 
register unsigned int y; 
402  
403 
if (width&15) { 
404 
yv12toyuy2(ysrc, usrc, vsrc, dst, c>srcW, srcSliceH, lumStride, chromStride, dstStride); 
405 
return srcSliceH;

406 
} 
407  
408 
/* This code assumes:

409 

410 
1) dst is 16 bytesaligned

411 
2) dstStride is a multiple of 16

412 
3) width is a multiple of 16

413 
4) lum & chrom stride are multiples of 8

414 
*/

415  
416 
for (y=0; y<height; y++) { 
417 
int i;

418 
for (i = 0; i < width  31; i+= 32) { 
419 
const unsigned int j = i >> 1; 
420 
vector unsigned char v_yA = vec_ld(i, ysrc); 
421 
vector unsigned char v_yB = vec_ld(i + 16, ysrc); 
422 
vector unsigned char v_yC = vec_ld(i + 32, ysrc); 
423 
vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); 
424 
vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); 
425 
vector unsigned char v_uA = vec_ld(j, usrc); 
426 
vector unsigned char v_uB = vec_ld(j + 16, usrc); 
427 
vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); 
428 
vector unsigned char v_vA = vec_ld(j, vsrc); 
429 
vector unsigned char v_vB = vec_ld(j + 16, vsrc); 
430 
vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); 
431 
vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 
432 
vector unsigned char v_uv_b = vec_mergel(v_u, v_v); 
433 
vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); 
434 
vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); 
435 
vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b); 
436 
vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b); 
437 
vec_st(v_yuy2_0, (i << 1), dst);

438 
vec_st(v_yuy2_1, (i << 1) + 16, dst); 
439 
vec_st(v_yuy2_2, (i << 1) + 32, dst); 
440 
vec_st(v_yuy2_3, (i << 1) + 48, dst); 
441 
} 
442 
if (i < width) {

443 
const unsigned int j = i >> 1; 
444 
vector unsigned char v_y1 = vec_ld(i, ysrc); 
445 
vector unsigned char v_u = vec_ld(j, usrc); 
446 
vector unsigned char v_v = vec_ld(j, vsrc); 
447 
vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 
448 
vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); 
449 
vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); 
450 
vec_st(v_yuy2_0, (i << 1), dst);

451 
vec_st(v_yuy2_1, (i << 1) + 16, dst); 
452 
} 
453 
if ((y&(vertLumPerChroma1)) == vertLumPerChroma1) { 
454 
usrc += chromStride; 
455 
vsrc += chromStride; 
456 
} 
457 
ysrc += lumStride; 
458 
dst += dstStride; 
459 
} 
460  
461 
return srcSliceH;

462 
} 
463  
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static inline int yv12touyvy_unscaled_altivec(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY, 
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int srcSliceH, uint8_t* dstParam[], int dstStride_a[]) { 
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uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY; 
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// yv12toyuy2(src[0], src[1], src[2], dst, c>srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

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uint8_t *ysrc = src[0];

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uint8_t *usrc = src[1];

470 
uint8_t *vsrc = src[2];

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const int width = c>srcW; 
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const int height = srcSliceH; 
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const int lumStride = srcStride[0]; 
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const int chromStride = srcStride[1]; 
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const int dstStride = dstStride_a[0]; 
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const int vertLumPerChroma = 2; 
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const vector unsigned char yperm = vec_lvsl(0, ysrc); 
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register unsigned int y; 
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if (width&15) { 
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yv12touyvy(ysrc, usrc, vsrc, dst, c>srcW, srcSliceH, lumStride, chromStride, dstStride); 
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return srcSliceH;

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} 
484  
485 
/* This code assumes:

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1) dst is 16 bytesaligned

488 
2) dstStride is a multiple of 16

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3) width is a multiple of 16

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4) lum & chrom stride are multiples of 8

491 
*/

492  
493 
for (y=0; y<height; y++) { 
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int i;

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for (i = 0; i < width  31; i+= 32) { 
496 
const unsigned int j = i >> 1; 
497 
vector unsigned char v_yA = vec_ld(i, ysrc); 
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vector unsigned char v_yB = vec_ld(i + 16, ysrc); 
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vector unsigned char v_yC = vec_ld(i + 32, ysrc); 
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vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); 
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vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); 
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vector unsigned char v_uA = vec_ld(j, usrc); 
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vector unsigned char v_uB = vec_ld(j + 16, usrc); 
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vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); 
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vector unsigned char v_vA = vec_ld(j, vsrc); 
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vector unsigned char v_vB = vec_ld(j + 16, vsrc); 
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vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); 
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vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 
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vector unsigned char v_uv_b = vec_mergel(v_u, v_v); 
510 
vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); 
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vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); 
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vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2); 
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vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2); 
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vec_st(v_uyvy_0, (i << 1), dst);

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vec_st(v_uyvy_1, (i << 1) + 16, dst); 
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vec_st(v_uyvy_2, (i << 1) + 32, dst); 
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vec_st(v_uyvy_3, (i << 1) + 48, dst); 
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} 
519 
if (i < width) {

520 
const unsigned int j = i >> 1; 
521 
vector unsigned char v_y1 = vec_ld(i, ysrc); 
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vector unsigned char v_u = vec_ld(j, usrc); 
523 
vector unsigned char v_v = vec_ld(j, vsrc); 
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vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 
525 
vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); 
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vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); 
527 
vec_st(v_uyvy_0, (i << 1), dst);

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vec_st(v_uyvy_1, (i << 1) + 16, dst); 
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} 
530 
if ((y&(vertLumPerChroma1)) == vertLumPerChroma1) { 
531 
usrc += chromStride; 
532 
vsrc += chromStride; 
533 
} 
534 
ysrc += lumStride; 
535 
dst += dstStride; 
536 
} 
537 
return srcSliceH;

538 
} 