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compiler/nir: Add new flags to lower pack/unpack split instructions

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And add new rules to do this lowering in nir_opt_algebraic.py.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6309>
This commit is contained in:
Boris Brezillon
2020-04-21 04:41:41 -07:00
committed by Marge Bot
parent 9e9d28007a
commit 18e464cfc0
2 changed files with 12 additions and 0 deletions
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4
src/compiler/nir/nir.h
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@@ -3064,11 +3064,15 @@ typedef struct nir_shader_compiler_options {
bool lower_pack_snorm_2x16;
bool lower_pack_unorm_4x8;
bool lower_pack_snorm_4x8;
bool lower_pack_64_2x32_split;
bool lower_pack_32_2x16_split;
bool lower_unpack_half_2x16;
bool lower_unpack_unorm_2x16;
bool lower_unpack_snorm_2x16;
bool lower_unpack_unorm_4x8;
bool lower_unpack_snorm_4x8;
bool lower_unpack_64_2x32_split;
bool lower_unpack_32_2x16_split;
bool lower_pack_split;

8
src/compiler/nir/nir_opt_algebraic.py
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@@ -1045,6 +1045,14 @@ optimizations.extend([
(('ibfe', a, 0, 16), ('extract_i16', a, 0), '!options->lower_extract_word'),
(('ibfe', a, 16, 16), ('extract_i16', a, 1), '!options->lower_extract_word'),
# Lower pack/unpack
(('pack_64_2x32_split', a, b), ('ior', ('u2u64', a), ('ishl', ('u2u64', b), 32)), 'options->lower_pack_64_2x32_split'),
(('pack_32_2x16_split', a, b), ('ior', ('u2u32', a), ('ishl', ('u2u32', b), 16)), 'options->lower_pack_32_2x16_split'),
(('unpack_64_2x32_split_x', a), ('u2u32', a), 'options->lower_unpack_64_2x32_split'),
(('unpack_64_2x32_split_y', a), ('u2u32', ('ushr', a, 32)), 'options->lower_unpack_64_2x32_split'),
(('unpack_32_2x16_split_x', a), ('u2u16', a), 'options->lower_unpack_32_2x16_split'),
(('unpack_32_2x16_split_y', a), ('u2u16', ('ushr', a, 16)), 'options->lower_unpack_32_2x16_split'),
# Useless masking before unpacking
(('unpack_half_2x16_split_x', ('iand', a, 0xffff)), ('unpack_half_2x16_split_x', a)),
(('unpack_32_2x16_split_x', ('iand', a, 0xffff)), ('unpack_32_2x16_split_x', a)),