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shader: implement BUFFER_ATOMIC_CMPSWAP (#357)

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shader: implement RDNA2 buffer atomic compare swap

Co-authored-by: nmzik <Nmzik@mail.ru>
This commit is contained in:
GodsWill Dev
2026-09-03 17:34:34 -04:00
committed by GitHub
parent 5b8e3b51b0
commit 2fe5c150bc
9 changed files with 142 additions and 49 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterMemory.cpp
+29 -14
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@@ -614,8 +614,9 @@ void FormattedStore(ValueEmitContext& ctx, const IR::Inst& inst, const IR::Memor
});
}
uint32_t AtomicOpcode(IR::ValueOpcode opcode) {
uint32_t SpirvAtomicOpcode(IR::ValueOpcode opcode) {
switch (opcode) {
case IR::ValueOpcode::BufferAtomicCmpSwap32: return OpAtomicCompareExchange;
case IR::ValueOpcode::BufferAtomicSwap32:
case IR::ValueOpcode::BufferAtomicSwap64:
case IR::ValueOpcode::SharedAtomicSwap32: return OpAtomicExchange;
@@ -642,23 +643,37 @@ uint32_t AtomicOpcode(IR::ValueOpcode opcode) {
}
}
uint32_t EmitAtomic(ValueEmitContext& ctx, const IR::Inst& inst, const IR::MemoryInfo& mem,
bool return_value) {
uint32_t EmitAtomicOperation(ValueEmitContext& ctx, const IR::Inst& inst, uint32_t pointer,
uint32_t scope) {
const auto old = ctx.state.builder.AllocateId();
if (inst.GetOpcode() == IR::ValueOpcode::BufferAtomicCmpSwap32) {
const auto desired = ctx.Arg(inst, inst.NumArgs() - 3);
const auto comparator = ctx.Arg(inst, inst.NumArgs() - 2);
ctx.state.builder.AddFunction(
{OpAtomicCompareExchange, TypeU32(ctx.state), old, pointer, ConstantU32(ctx.state, scope),
ConstantU32(ctx.state, MemorySemanticsNone),
ConstantU32(ctx.state, MemorySemanticsNone), desired, comparator});
} else {
const auto value = ctx.Arg(inst, inst.NumArgs() - 2);
ctx.state.builder.AddFunction(
{SpirvAtomicOpcode(inst.GetOpcode()), TypeU32(ctx.state), old, pointer,
ConstantU32(ctx.state, scope), ConstantU32(ctx.state, MemorySemanticsNone), value});
}
return old;
}
uint32_t EmitAtomic(ValueEmitContext& ctx, const IR::Inst& inst, const IR::MemoryInfo& mem) {
const auto result =
EmitValueOrZeroIfCondition(ctx.state, ctx.Arg(inst, inst.NumArgs() - 1), [&]() {
const auto access = PrepareMemoryElement(ctx, mem, DwordIndex(ctx, inst, mem));
return EmitValueOrZeroIfCondition(
ctx.state, EmitMemoryElementInBounds(ctx.state, access.resource, access.index),
[&]() {
const auto value = ctx.Arg(inst, inst.NumArgs() - 2);
const auto old = ctx.state.builder.AllocateId();
const auto scope =
mem.kind == IR::ResourceKind::Lds ? ScopeWorkgroup : ScopeDevice;
ctx.state.builder.AddFunction(
{AtomicOpcode(inst.GetOpcode()), TypeU32(ctx.state), old,
EmitMemoryElementPointer(ctx.state, access.resource, access.index),
ConstantU32(ctx.state, scope), ConstantU32(ctx.state, MemorySemanticsNone),
value});
const auto pointer =
EmitMemoryElementPointer(ctx.state, access.resource, access.index);
const auto old = EmitAtomicOperation(ctx, inst, pointer, scope);
if (mem.kind == IR::ResourceKind::Lds) {
const auto semantics =
MemorySemanticsAcquireRelease | MemorySemanticsWorkgroupMemory;
@@ -671,7 +686,7 @@ uint32_t EmitAtomic(ValueEmitContext& ctx, const IR::Inst& inst, const IR::Memor
return old;
});
});
return return_value ? result : ConstantU32(ctx.state, 0);
return result;
}
uint32_t EmitBufferAtomic64(ValueEmitContext& ctx, const IR::Inst& inst,
@@ -692,7 +707,7 @@ uint32_t EmitBufferAtomic64(ValueEmitContext& ctx, const IR::Inst& inst,
ctx.Arg(inst, inst.NumArgs() - 2));
const auto old = state.builder.AllocateId();
state.builder.AddFunction(
{AtomicOpcode(inst.GetOpcode()), TypeScalarU64(state), old,
{SpirvAtomicOpcode(inst.GetOpcode()), TypeScalarU64(state), old,
EmitStorageBufferElementPointer(
state, resource, index, TypeStorageBufferU64ElementPointer(state)),
ConstantU32(state, ScopeDevice),
@@ -1210,13 +1225,13 @@ bool EmitValueMemory(ValueEmitContext& ctx, const IR::Inst& inst) {
StoreWord(ctx, inst, mem);
return true;
}
const auto atomic_opcode = AtomicOpcode(op);
const auto atomic_opcode = SpirvAtomicOpcode(op);
if (atomic_opcode != 0 && inst.GetType() == IR::Type::U64) {
ctx.Define(inst, EmitBufferAtomic64(ctx, inst, ctx.Memory(inst)));
return true;
}
if (atomic_opcode != 0) {
ctx.Define(inst, EmitAtomic(ctx, inst, ctx.Memory(inst), true));
ctx.Define(inst, EmitAtomic(ctx, inst, ctx.Memory(inst)));
return true;
}
if (op == IR::ValueOpcode::BufferAtomicFMin32 || op == IR::ValueOpcode::BufferAtomicFMax32) {
src/graphics/shader/recompiler/frontend/decode/MemoryOps.cpp
+1
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@@ -47,6 +47,7 @@ constexpr MemoryOpcodeInfo MUBUF_OPCODE_LIST[] = {
{0x1eu, Opcode::BUFFER_STORE_DWORDX4, 4, 32},
{0x1fu, Opcode::BUFFER_STORE_DWORDX3, 3, 32},
{0x30u, Opcode::BUFFER_ATOMIC_SWAP, 1, 32},
{0x31u, Opcode::BUFFER_ATOMIC_CMPSWAP, 1, 32},
{0x32u, Opcode::BUFFER_ATOMIC_ADD, 1, 32},
{0x33u, Opcode::BUFFER_ATOMIC_SUB, 1, 32},
{0x35u, Opcode::BUFFER_ATOMIC_SMIN, 1, 32},
src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.cpp
+1
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@@ -592,6 +592,7 @@ std::string InstructionToString(const Instruction& inst) {
case Opcode::TBUFFER_STORE_FORMAT_XYZ:
case Opcode::TBUFFER_STORE_FORMAT_XYZW:
case Opcode::BUFFER_ATOMIC_SWAP:
case Opcode::BUFFER_ATOMIC_CMPSWAP:
case Opcode::BUFFER_ATOMIC_SWAP_X2:
case Opcode::BUFFER_ATOMIC_ADD:
case Opcode::BUFFER_ATOMIC_SUB:
src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.h
+1
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@@ -455,6 +455,7 @@ enum class Opcode {
TBUFFER_STORE_FORMAT_XYZ,
TBUFFER_STORE_FORMAT_XYZW,
BUFFER_ATOMIC_SWAP,
BUFFER_ATOMIC_CMPSWAP,
BUFFER_ATOMIC_SWAP_X2,
BUFFER_ATOMIC_ADD,
BUFFER_ATOMIC_SUB,
src/graphics/shader/recompiler/frontend/translate/Memory.cpp
+19 -6
View File
@@ -523,12 +523,23 @@ bool Translator::BUFFER_ATOMIC(const Decoder::Instruction& inst, IR::ValueOpcode
const auto resource = GetBufferResource(memory);
const auto address = ReadBufferAddress(inst, 1);
const auto data_src = MemorySourceAt(inst, 0);
const IR::Value data =
memory.data_dwords == 2u ? IR::Value(ReadU64(data_src)) : IR::Value(ReadU32(data_src));
const auto result = ir.Emit(opcode,
{resource, address.index, address.offset, address.soffset, data,
ir.GetExec()},
AddMemoryInfo(memory, inst.pc));
const auto flags = AddMemoryInfo(memory, inst.pc);
IR::Value result;
if (opcode == IR::ValueOpcode::BufferAtomicCmpSwap32) {
const auto desired = ReadU32(data_src);
const auto comparator = ReadU32(OffsetOperand(data_src, 1u));
result = ir.Emit(opcode,
{resource, address.index, address.offset, address.soffset, desired,
comparator, ir.GetExec()},
flags);
} else {
const IR::Value value =
memory.data_dwords == 2u ? IR::Value(ReadU64(data_src)) : IR::Value(ReadU32(data_src));
result = ir.Emit(opcode,
{resource, address.index, address.offset, address.soffset, value,
ir.GetExec()},
flags);
}
if (inst.glc) {
WriteOperand(inst.dst, result);
}
@@ -922,6 +933,8 @@ bool Translator::EmitMemory(const Decoder::Instruction& inst) {
case Decoder::Opcode::BUFFER_ATOMIC_SWAP:
return BUFFER_ATOMIC(inst, IR::ValueOpcode::BufferAtomicSwap32);
case Decoder::Opcode::BUFFER_ATOMIC_CMPSWAP:
return BUFFER_ATOMIC(inst, IR::ValueOpcode::BufferAtomicCmpSwap32);
case Decoder::Opcode::BUFFER_ATOMIC_SWAP_X2:
return BUFFER_ATOMIC(inst, IR::ValueOpcode::BufferAtomicSwap64);
case Decoder::Opcode::BUFFER_ATOMIC_ADD:
src/graphics/shader/recompiler/ir/opcodes/ValueOpcodes.cpp
+1
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@@ -111,6 +111,7 @@ BufferAccess BufferAccessOf(ValueOpcode opcode) {
case ValueOpcode::StoreBufferU32x3:
case ValueOpcode::StoreBufferU32x4: return BufferAccess::Write;
case ValueOpcode::BufferAtomicSwap32:
case ValueOpcode::BufferAtomicCmpSwap32:
case ValueOpcode::BufferAtomicSwap64:
case ValueOpcode::BufferAtomicIAdd32:
case ValueOpcode::BufferAtomicISub32:
src/graphics/shader/recompiler/ir/opcodes/ValueOpcodes.inc
+1
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@@ -222,6 +222,7 @@ VALUE_OPCODE(StoreBufferU32x2, Void, BufferResource, U32, U32, U32, U32x2, U1)
VALUE_OPCODE(StoreBufferU32x3, Void, BufferResource, U32, U32, U32, U32x3, U1)
VALUE_OPCODE(StoreBufferU32x4, Void, BufferResource, U32, U32, U32, U32x4, U1)
VALUE_OPCODE(BufferAtomicSwap32, U32, BufferResource, U32, U32, U32, U32, U1)
VALUE_OPCODE(BufferAtomicCmpSwap32, U32, BufferResource, U32, U32, U32, U32, U32, U1)
VALUE_OPCODE(BufferAtomicSwap64, U64, BufferResource, U32, U32, U32, U64, U1)
VALUE_OPCODE(BufferAtomicIAdd32, U32, BufferResource, U32, U32, U32, U32, U1)
VALUE_OPCODE(BufferAtomicISub32, U32, BufferResource, U32, U32, U32, U32, U1)