From 1dacb562792782ca7793674ff5e7fc796b044915 Mon Sep 17 00:00:00 2001 From: Iago Toral Quiroga Date: Tue, 17 Apr 2018 10:22:43 +0200 Subject: [PATCH] compiler/spirv: implement 16-bit bitcasts Reviewed-by: Jason Ekstrand --- src/compiler/spirv/vtn_alu.c | 31 ++++++++++++++++++++++--------- 1 file changed, 22 insertions(+), 9 deletions(-) diff --git a/src/compiler/spirv/vtn_alu.c b/src/compiler/spirv/vtn_alu.c index b6f98483ec6..5f9cc97fdfb 100644 --- a/src/compiler/spirv/vtn_alu.c +++ b/src/compiler/spirv/vtn_alu.c @@ -251,10 +251,17 @@ vtn_handle_bitcast(struct vtn_builder *b, struct vtn_ssa_value *dest, vtn_assert(src_bit_size % dest_bit_size == 0); unsigned divisor = src_bit_size / dest_bit_size; for (unsigned comp = 0; comp < src_components; comp++) { - vtn_assert(src_bit_size == 64); - vtn_assert(dest_bit_size == 32); - nir_ssa_def *split = - nir_unpack_64_2x32(&b->nb, nir_channel(&b->nb, src, comp)); + nir_ssa_def *split; + if (src_bit_size == 64) { + assert(dest_bit_size == 32 || dest_bit_size == 16); + split = dest_bit_size == 32 ? + nir_unpack_64_2x32(&b->nb, nir_channel(&b->nb, src, comp)) : + nir_unpack_64_4x16(&b->nb, nir_channel(&b->nb, src, comp)); + } else { + vtn_assert(src_bit_size == 32); + vtn_assert(dest_bit_size == 16); + split = nir_unpack_32_2x16(&b->nb, nir_channel(&b->nb, src, comp)); + } for (unsigned i = 0; i < divisor; i++) dest_chan[divisor * comp + i] = nir_channel(&b->nb, split, i); } @@ -263,11 +270,17 @@ vtn_handle_bitcast(struct vtn_builder *b, struct vtn_ssa_value *dest, unsigned divisor = dest_bit_size / src_bit_size; for (unsigned comp = 0; comp < dest_components; comp++) { unsigned channels = ((1 << divisor) - 1) << (comp * divisor); - nir_ssa_def *src_chan = - nir_channels(&b->nb, src, channels); - vtn_assert(dest_bit_size == 64); - vtn_assert(src_bit_size == 32); - dest_chan[comp] = nir_pack_64_2x32(&b->nb, src_chan); + nir_ssa_def *src_chan = nir_channels(&b->nb, src, channels); + if (dest_bit_size == 64) { + assert(src_bit_size == 32 || src_bit_size == 16); + dest_chan[comp] = src_bit_size == 32 ? + nir_pack_64_2x32(&b->nb, src_chan) : + nir_pack_64_4x16(&b->nb, src_chan); + } else { + vtn_assert(dest_bit_size == 32); + vtn_assert(src_bit_size == 16); + dest_chan[comp] = nir_pack_32_2x16(&b->nb, src_chan); + } } } dest->def = nir_vec(&b->nb, dest_chan, dest_components); -- 2.30.2