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shader: preserve full region addresses for LDS and GDS reads and writes

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This commit is contained in:
nmzik
2026-10-12 19:31:20 +02:00
parent 460a196fca
commit d692d8ee08
2 changed files with 52 additions and 8 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterMemory.cpp
+7 -8
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@@ -276,14 +276,8 @@ uint32_t ByteAddress(ValueEmitContext& ctx, const IR::Inst& inst, const IR::Memo
uint32_t DwordIndex(ValueEmitContext& ctx, const IR::Inst& inst, const IR::MemoryInfo& mem,
uint32_t prefix = 0) {
auto address = ByteAddress(ctx, inst, mem, prefix);
if (mem.kind == IR::ResourceKind::Lds || mem.kind == IR::ResourceKind::Gds) {
// RDNA2 DS region addresses retain bits [15:2] after adding the byte offset.
address = Binary(ctx.state, spv::OpBitwiseAnd, TypeU32(ctx.state), address,
ConstantU32(ctx.state, 0xffffu));
}
return Binary(ctx.state, spv::OpShiftRightLogical, TypeU32(ctx.state),
address, ConstantU32(ctx.state, 2));
ByteAddress(ctx, inst, mem, prefix), ConstantU32(ctx.state, 2));
}
uint32_t LoadWordInBounds(ValueEmitContext& ctx, const MemoryResourceAccess& resource,
@@ -632,7 +626,12 @@ template <typename Fn>
uint32_t EmitAtomicAccess(ValueEmitContext& ctx, const IR::Inst& inst,
const IR::MemoryInfo& mem, Fn&& operation) {
return EmitValueOrZeroIfCondition(ctx.state, ctx.Arg(inst, inst.NumArgs() - 1), [&]() {
const auto index = DwordIndex(ctx, inst, mem);
auto index = DwordIndex(ctx, inst, mem);
if (mem.kind == IR::ResourceKind::Lds || mem.kind == IR::ResourceKind::Gds) {
// Keep region-address truncation local to DS atomics.
index = Binary(ctx.state, spv::OpBitwiseAnd, TypeU32(ctx.state), index,
ConstantU32(ctx.state, 0x3fffu));
}
const auto resource = PrepareMemoryResourceAccess(ctx.state, mem);
return EmitValueOrZeroIfCondition(
ctx.state, EmitMemoryElementInBounds(ctx.state, resource, index), [&]() {