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) { register int i; int __attribute__ ((aligned (16))) tempo[4]; if (filterSize % 4) { for(i=0; i<dstW; i++) { register int j; register int srcPos = filterPos[i]; register int val = 0; for(j=0; j<filterSize; j++) { val += ((int)src[srcPos + j])*filter[filterSize*i + j]; } dst[i] = av_clip(val>>7, 0, (1<<15)-1); } } else switch (filterSize) { case 4: { for(i=0; i<dstW; i++) { register int srcPos = filterPos[i]; vector unsigned char src_v0 = vec_ld(srcPos, src); vector unsigned char src_v1, src_vF; vector signed short src_v, filter_v; vector signed int val_vEven, val_s; if ((((int)src + srcPos)% 16) > 12) { src_v1 = vec_ld(srcPos + 16, src); } src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); src_v = // vec_unpackh sign-extends... (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); // now put our elements in the even slots src_v = vec_mergeh(src_v, (vector signed short)vzero); filter_v = vec_ld(i << 3, filter); // the 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2) // the neat trick : we only care for half the elements, // high or low depending on (i<<3)%16 (it's 0 or 8 here), // and we're going to use vec_mule, so we chose // carefully how to "unpack" the elements into the even slots if ((i << 3) % 16) filter_v = vec_mergel(filter_v,(vector signed short)vzero); else filter_v = vec_mergeh(filter_v,(vector signed short)vzero); val_vEven = vec_mule(src_v, filter_v); val_s = vec_sums(val_vEven, vzero); vec_st(val_s, 0, tempo); dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1); } } break; case 8: { for(i=0; i<dstW; i++) { register int srcPos = filterPos[i]; vector unsigned char src_v0 = vec_ld(srcPos, src); vector unsigned char src_v1, src_vF; vector signed short src_v, filter_v; vector signed int val_v, val_s; if ((((int)src + srcPos)% 16) > 8) { src_v1 = vec_ld(srcPos + 16, src); } src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); src_v = // vec_unpackh sign-extends... (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); filter_v = vec_ld(i << 4, filter); // the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2) val_v = vec_msums(src_v, filter_v, (vector signed int)vzero); val_s = vec_sums(val_v, vzero); vec_st(val_s, 0, tempo); dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1); } } break; case 16: { for(i=0; i<dstW; i++) { register int srcPos = filterPos[i]; vector unsigned char src_v0 = vec_ld(srcPos, src); vector unsigned char src_v1 = vec_ld(srcPos + 16, src); vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); vector signed short src_vA = // vec_unpackh sign-extends... (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); vector signed short src_vB = // vec_unpackh sign-extends... (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF)); vector signed short filter_v0 = vec_ld(i << 5, filter); vector signed short filter_v1 = vec_ld((i << 5) + 16, filter); // the 5 above are 4 (filterSize == 16) + 1 (sizeof(short) == 2) vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero); vector signed int val_v = vec_msums(src_vB, filter_v1, val_acc); vector signed int val_s = vec_sums(val_v, vzero); vec_st(val_s, 0, tempo); dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1); } } break; default: { for(i=0; i<dstW; i++) { register int j; register int srcPos = filterPos[i]; vector signed int val_s, val_v = (vector signed int)vzero; vector signed short filter_v0R = vec_ld(i * 2 * filterSize, filter); vector unsigned char permF = vec_lvsl((i * 2 * filterSize), filter); vector unsigned char src_v0 = vec_ld(srcPos, src); vector unsigned char permS = vec_lvsl(srcPos, src); for (j = 0 ; j < filterSize - 15; j += 16) { vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src); vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS); vector signed short src_vA = // vec_unpackh sign-extends... (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); vector signed short src_vB = // vec_unpackh sign-extends... (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF)); vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); vector signed short filter_v2R = vec_ld((i * 2 * filterSize) + (j * 2) + 32, filter); vector signed short filter_v0 = vec_perm(filter_v0R, filter_v1R, permF); vector signed short filter_v1 = vec_perm(filter_v1R, filter_v2R, permF); vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v); val_v = vec_msums(src_vB, filter_v1, val_acc); filter_v0R = filter_v2R; src_v0 = src_v1; } if (j < (filterSize-7)) { // loading src_v0 is useless, it's already done above //vector unsigned char src_v0 = vec_ld(srcPos + j, src); vector unsigned char src_v1, src_vF; vector signed short src_v, filter_v1R, filter_v; if ((((int)src + srcPos)% 16) > 8) { src_v1 = vec_ld(srcPos + j + 16, src); } src_vF = vec_perm(src_v0, src_v1, permS); src_v = // vec_unpackh sign-extends... (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); // loading filter_v0R is useless, it's already done above //vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter); filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); filter_v = vec_perm(filter_v0R, filter_v1R, permF); val_v = vec_msums(src_v, filter_v, val_v); } val_s = vec_sums(val_v, vzero); vec_st(val_s, 0, tempo); dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1); } } } }