diff options
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_conv.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_conv.c b/src/gallium/auxiliary/gallivm/lp_bld_conv.c index 69d24a55bce..c8f9c28ddc6 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_conv.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_conv.c @@ -497,8 +497,25 @@ int lp_build_conv_auto(struct gallivm_state *gallivm, if (src_type.width == dst_type->width) { lp_build_conv(gallivm, src_type, *dst_type, src, num_srcs, dst, num_dsts); } else { - for (i = 0; i < num_srcs; ++i) { - lp_build_conv(gallivm, src_type, *dst_type, &src[i], 1, &dst[i], 1); + /* + * If dst_width is 16 bits and src_width 32 and the dst vector size + * 64bit, try feeding 2 vectors at once so pack intrinsics can be used. + * (For AVX, this isn't needed, since we usually get 256bit src and + * 128bit dst vectors which works ok. If we do AVX2 pack this should + * be extended but need to be able to tell conversion code about pack + * ordering first.) + */ + unsigned ratio = 1; + if (src_type.width == 2 * dst_type->width && + src_type.length == dst_type->length && + dst_type->floating == 0 && (num_srcs % 2 == 0) && + dst_type->width * dst_type->length == 64) { + ratio = 2; + num_dsts /= 2; + dst_type->length *= 2; + } + for (i = 0; i < num_dsts; i++) { + lp_build_conv(gallivm, src_type, *dst_type, &src[i*ratio], ratio, &dst[i], 1); } } |