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shader: keep GPU-derived scalar resource reads on the GPU

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Co-authored-by: Ali Almohaya <AliAlmohaya@gmail.com>
Co-authored-by: TheCruZ <thecruzwtf@gmail.com>
This commit is contained in:
nmzik
2026-10-04 03:18:09 +04:00
parent f18679e0cd
commit b4d32394b6
7 changed files with 169 additions and 21 deletions
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src/graphics/shader/recompiler/backend/spirv/SpirvEmitter.cpp
+2 -1
View File
@@ -222,7 +222,8 @@ Emitter::SpirvRequirements Emitter::AnalyzeProgramRequirements(const IR::Program
Fail(program, "buffer operation has invalid memory metadata");
}
const auto& memory = program.memory_info[memory_index];
if (memory.kind == IR::ResourceKind::IndirectBuffer) {
if (memory.kind == IR::ResourceKind::IndirectBuffer &&
inst.GetOpcode() != IR::ValueOpcode::ReadConstBuffer) {
requirements.subgroup_local_invocation_id = true;
}
if (memory.kind == IR::ResourceKind::Buffer) {
src/graphics/shader/recompiler/backend/spirv/spirvEmitterMemory.cpp
+33
View File
@@ -809,6 +809,35 @@ void FormattedStore(ValueEmitContext& ctx, const IR::Inst& inst, const IR::Memor
});
}
uint32_t LoadIndirectScalarBuffer(ValueEmitContext& ctx, const IR::Inst& inst) {
auto& state = ctx.state;
const auto& handle = *inst.Arg(0).ResolveInstruction();
const auto word1 = ctx.Arg(handle, 1);
const auto stride = EmitBitFieldUExtract(state, word1, ConstantU32(state, 16),
ConstantU32(state, 14));
const auto size = Binary(
state, spv::OpIMul, TypeScalarU64(state),
Unary(state, spv::OpUConvert, TypeScalarU64(state),
EmitUMax32(state, stride, ConstantU32(state, 1))),
Unary(state, spv::OpUConvert, TypeScalarU64(state), ctx.Arg(handle, 2)));
const auto offset = Binary(
state, spv::OpIAdd, TypeScalarU64(state),
Unary(state, spv::OpUConvert, TypeScalarU64(state),
Binary(state, spv::OpBitwiseAnd, TypeU32(state), ctx.Arg(inst, 1),
ConstantU32(state, ~3u))),
ConstantDeviceAddress(state, ctx.Memory(inst).offset & ~3u));
const auto end = Binary(state, spv::OpIAdd, TypeScalarU64(state), offset,
ConstantDeviceAddress(state, sizeof(uint32_t)));
return EmitValueOrZeroIfCondition(
state, Binary(state, spv::OpULessThanEqual, TypeBool(state), end, size), [&]() {
const auto base = DeviceAddressFromWords(
state, Binary(state, spv::OpBitwiseAnd, TypeU32(state), ctx.Arg(handle, 0),
ConstantU32(state, ~3u)),
Binary(state, spv::OpBitwiseAnd, TypeU32(state), word1, ConstantU32(state, 0xffffu)));
return LoadBdaDword(ctx, Binary(state, spv::OpIAdd, TypeScalarU64(state), base, offset));
});
}
uint32_t LoadIndirectBuffer(ValueEmitContext& ctx, const IR::Inst& inst, uint32_t components) {
auto& state = ctx.state;
const auto& handle = *inst.Arg(0).ResolveInstruction();
@@ -1249,6 +1278,10 @@ uint32_t EmitReadConst(ValueEmitContext& ctx, const IR::Inst& inst) {
void EmitReadConstBuffer(ValueEmitContext& ctx, const IR::Inst& inst) {
auto mem = ctx.Memory(inst);
if (mem.planning_only) return;
if (mem.kind == IR::ResourceKind::IndirectBuffer) {
ctx.Define(inst, LoadIndirectScalarBuffer(ctx, inst));
return;
}
auto& state = ctx.state;
mem.kind = IR::ResourceKind::ScalarBuffer;
auto index = Binary(state, spv::OpShiftRightLogical, TypeU32(state), ctx.Arg(inst, 1),