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nir_lower_mem_access_bit_sizes: support unaligned store_scratch

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This can be trivially be added as it doesn't even need atomics.

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29711>
This commit is contained in:
Karol Herbst 2024-06-13 11:28:17 +02:00 • committed by Marge Bot
parent a589901328
commit d2d966a3c2
1 changed files with 9 additions and 1 deletions
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10
src/compiler/nir/nir_lower_mem_access_bit_sizes.c
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@ -241,6 +241,7 @@ lower_mem_store(nir_builder *b, nir_intrinsic_instr *intrin,
nir_src *offset_src = nir_get_io_offset_src(intrin);
const bool offset_is_const = nir_src_is_const(*offset_src);
nir_def *offset = offset_src->ssa;
bool is_scratch = intrin->intrinsic == nir_intrinsic_store_scratch;
nir_component_mask_t writemask = nir_intrinsic_write_mask(intrin);
assert(writemask < (1 << num_components));
@ -295,7 +296,7 @@ lower_mem_store(nir_builder *b, nir_intrinsic_instr *intrin,
chunk_bytes > max_chunk_bytes) {
/* Otherwise the caller made a mistake with their return values. */
assert(chunk_bytes <= 4);
assert(allow_unaligned_stores_as_atomics);
assert(allow_unaligned_stores_as_atomics || is_scratch);
/* We'll turn this into a pair of 32-bit atomics to modify only the right
* bits of memory.
@ -360,6 +361,13 @@ lower_mem_store(nir_builder *b, nir_intrinsic_instr *intrin,
.atomic_op = nir_atomic_op_ior,
.base = nir_intrinsic_base(intrin));
break;
case nir_intrinsic_store_scratch: {
nir_def *value = nir_load_scratch(b, 1, 32, chunk_offset);
value = nir_iand(b, value, iand_mask);
value = nir_ior(b, value, data);
nir_store_scratch(b, value, chunk_offset);
break;
}
default:
unreachable("Unsupported unaligned store");
}