From daf39e348fb39037dfdb06af55276c834393b1b9 Mon Sep 17 00:00:00 2001 From: Ari Lemmetti Date: Wed, 13 Jan 2016 19:27:45 +0200 Subject: [PATCH] Add dedicated handling for blitting NxN coeffs when N is 4, 8 or 16 --- src/cu.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 54 insertions(+), 3 deletions(-) diff --git a/src/cu.c b/src/cu.c index 354199e2..5adfe2c2 100644 --- a/src/cu.c +++ b/src/cu.c @@ -81,9 +81,60 @@ void kvz_coefficients_blit(const coeff_t * const orig, coeff_t * const dst, const unsigned orig_stride, const unsigned dst_stride) { unsigned y; - - for (y = 0; y < height; ++y) { - memcpy(&dst[y*dst_stride], &orig[y*orig_stride], width * sizeof(coeff_t)); + + int nxn_width = (width == height) ? width : 0; + switch (nxn_width) { + case 4: + *(int64_t*)&dst[dst_stride*0] = *(int64_t*)&orig[orig_stride*0]; + *(int64_t*)&dst[dst_stride*1] = *(int64_t*)&orig[orig_stride*1]; + *(int64_t*)&dst[dst_stride*2] = *(int64_t*)&orig[orig_stride*2]; + *(int64_t*)&dst[dst_stride*3] = *(int64_t*)&orig[orig_stride*3]; + break; + case 8: +#define KVZ_COPY_ROW_8(row_num) \ +*(int64_t*)&dst[dst_stride*(row_num)] = *(int64_t*)&orig[orig_stride*(row_num)]; \ +*(int64_t*)&dst[dst_stride*(row_num) + 4] = *(int64_t*)&orig[orig_stride*(row_num) + 4]; + + KVZ_COPY_ROW_8(0); + KVZ_COPY_ROW_8(1); + KVZ_COPY_ROW_8(2); + KVZ_COPY_ROW_8(3); + KVZ_COPY_ROW_8(4); + KVZ_COPY_ROW_8(5); + KVZ_COPY_ROW_8(6); + KVZ_COPY_ROW_8(7); + break; +#undef KVZ_COPY_ROW_8 + case 16: +#define KVZ_COPY_ROW_16(row_num) \ +*(int64_t*)&dst[dst_stride*(row_num)] = *(int64_t*)&orig[orig_stride*(row_num)]; \ +*(int64_t*)&dst[dst_stride*(row_num) + 4] = *(int64_t*)&orig[orig_stride*(row_num) + 4]; \ +*(int64_t*)&dst[dst_stride*(row_num) + 8] = *(int64_t*)&orig[orig_stride*(row_num) + 8]; \ +*(int64_t*)&dst[dst_stride*(row_num) + 12] = *(int64_t*)&orig[orig_stride*(row_num) + 12]; + + KVZ_COPY_ROW_16(0); + KVZ_COPY_ROW_16(1); + KVZ_COPY_ROW_16(2); + KVZ_COPY_ROW_16(3); + KVZ_COPY_ROW_16(4); + KVZ_COPY_ROW_16(5); + KVZ_COPY_ROW_16(6); + KVZ_COPY_ROW_16(7); + KVZ_COPY_ROW_16(8); + KVZ_COPY_ROW_16(9); + KVZ_COPY_ROW_16(10); + KVZ_COPY_ROW_16(11); + KVZ_COPY_ROW_16(12); + KVZ_COPY_ROW_16(13); + KVZ_COPY_ROW_16(14); + KVZ_COPY_ROW_16(15); + break; +#undef KVZ_COPY_ROW_16 + default: + for (y = 0; y < height; ++y) { + memcpy(&dst[y*dst_stride], &orig[y*orig_stride], width * sizeof(coeff_t)); + } + break; } }