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shader: unpack buffer offsets from one load per packed word

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This commit is contained in:
nmzik
2026-10-09 02:46:18 +02:00
parent b4853a0e08
commit 13e3ca314c
2 changed files with 29 additions and 30 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterMemoryHelpers.cpp
+5 -5
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@@ -104,13 +104,13 @@ Prospero::BufferFormat StorageBufferFormat(const EmitterState& state, const IR::
void EmitMemoryOffsets(EmitterState& state) {
const auto count = state.program.bindings.descriptor_counts[static_cast<size_t>(IR::DescriptorBindingKind::Buffers)];
for (uint32_t i = 0; i < count; i++) {
for (uint32_t i = 0; i < count; i += 4u) {
const auto word =
EmitShaderDataDwordLoad(state, state.program.bindings.memory_offset_dword + i / 4u);
const auto shift = ConstantU32(state, (i % 4u) * 8u);
state.memory_byte_offsets[i] = EmitBinaryU32(
state, spv::OpBitwiseAnd, EmitBinaryU32(state, spv::OpShiftRightLogical, word, shift),
ConstantU32(state, 0xffu));
for (uint32_t lane = 0; lane < std::min(4u, count - i); ++lane) {
state.memory_byte_offsets[i + lane] = EmitNative<spv::OpBitFieldUExtract, IR::Type::U32>(
state, word, ConstantU32(state, lane * 8u), ConstantU32(state, 8u));
}
}
}