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shader: Implement BAR and fix memory barriers

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This commit is contained in:
ReinUsesLisp
2021-04-04 03:04:48 -03:00
committed by ameerj
parent 85795de99f
commit fc93bc2abd
7 changed files with 79 additions and 5 deletions
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1
src/shader_recompiler/backend/spirv/emit_spirv.h
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@@ -28,6 +28,7 @@ void EmitSelectionMerge(EmitContext& ctx, Id merge_label);
void EmitReturn(EmitContext& ctx);
void EmitUnreachable(EmitContext& ctx);
void EmitDemoteToHelperInvocation(EmitContext& ctx, Id continue_label);
void EmitBarrier(EmitContext& ctx);
void EmitMemoryBarrierWorkgroupLevel(EmitContext& ctx);
void EmitMemoryBarrierDeviceLevel(EmitContext& ctx);
void EmitMemoryBarrierSystemLevel(EmitContext& ctx);

15
src/shader_recompiler/backend/spirv/emit_spirv_barriers.cpp
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@@ -8,16 +8,25 @@
namespace Shader::Backend::SPIRV {
namespace {
void EmitMemoryBarrierImpl(EmitContext& ctx, spv::Scope scope) {
const auto semantics =
const auto semantics{
spv::MemorySemanticsMask::AcquireRelease | spv::MemorySemanticsMask::UniformMemory |
spv::MemorySemanticsMask::WorkgroupMemory | spv::MemorySemanticsMask::AtomicCounterMemory |
spv::MemorySemanticsMask::ImageMemory;
spv::MemorySemanticsMask::ImageMemory};
ctx.OpMemoryBarrier(ctx.Constant(ctx.U32[1], static_cast<u32>(scope)),
ctx.Constant(ctx.U32[1], static_cast<u32>(semantics)));
}
} // Anonymous namespace
void EmitBarrier(EmitContext& ctx) {
const auto execution{spv::Scope::Workgroup};
const auto memory{spv::Scope::Workgroup};
const auto memory_semantics{spv::MemorySemanticsMask::AcquireRelease |
spv::MemorySemanticsMask::WorkgroupMemory};
ctx.OpControlBarrier(ctx.Constant(ctx.U32[1], static_cast<u32>(execution)),
ctx.Constant(ctx.U32[1], static_cast<u32>(memory)),
ctx.Constant(ctx.U32[1], static_cast<u32>(memory_semantics)));
}
void EmitMemoryBarrierWorkgroupLevel(EmitContext& ctx) {
EmitMemoryBarrierImpl(ctx, spv::Scope::Workgroup);
}

4
src/shader_recompiler/frontend/ir/ir_emitter.cpp
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@@ -82,6 +82,10 @@ void IREmitter::SelectionMerge(Block* merge_block) {
Inst(Opcode::SelectionMerge, merge_block);
}
void IREmitter::Barrier() {
Inst(Opcode::Barrier);
}
void IREmitter::MemoryBarrier(MemoryScope scope) {
switch (scope) {
case MemoryScope::Workgroup:

1
src/shader_recompiler/frontend/ir/ir_emitter.h
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@@ -128,6 +128,7 @@ public:
[[nodiscard]] Value Select(const U1& condition, const Value& true_value,
const Value& false_value);
[[nodiscard]] void Barrier();
[[nodiscard]] void MemoryBarrier(MemoryScope scope);
template <typename Dest, typename Source>

4
src/shader_recompiler/frontend/ir/microinstruction.cpp
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@@ -57,6 +57,10 @@ bool Inst::MayHaveSideEffects() const noexcept {
case Opcode::Return:
case Opcode::Unreachable:
case Opcode::DemoteToHelperInvocation:
case Opcode::Barrier:
case Opcode::MemoryBarrierWorkgroupLevel:
case Opcode::MemoryBarrierDeviceLevel:
case Opcode::MemoryBarrierSystemLevel:
case Opcode::Prologue:
case Opcode::Epilogue:
case Opcode::SetAttribute:

1
src/shader_recompiler/frontend/ir/opcodes.inc
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@@ -17,6 +17,7 @@ OPCODE(Unreachable, Void,
OPCODE(DemoteToHelperInvocation, Void, Label, )
// Barriers
OPCODE(Barrier, Void, )
OPCODE(MemoryBarrierWorkgroupLevel, Void, )
OPCODE(MemoryBarrierDeviceLevel, Void, )
OPCODE(MemoryBarrierSystemLevel, Void, )

58
src/shader_recompiler/frontend/maxwell/translate/impl/barrier_operations.cpp
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@@ -38,6 +38,7 @@ void TranslatorVisitor::MEMBAR(u64 inst) {
u64 raw;
BitField<8, 2, LocalScope> scope;
} membar{inst};
ir.MemoryBarrier(LocalScopeToMemoryScope(membar.scope));
}
@@ -45,8 +46,61 @@ void TranslatorVisitor::DEPBAR() {
// DEPBAR is a no-op
}
void TranslatorVisitor::BAR(u64) {
throw NotImplementedException("Instruction {} is not implemented", Opcode::BAR);
void TranslatorVisitor::BAR(u64 insn) {
enum class Mode {
RedPopc,
Scan,
RedAnd,
RedOr,
Sync,
Arrive,
};
union {
u64 raw;
BitField<43, 1, u64> is_a_imm;
BitField<44, 1, u64> is_b_imm;
BitField<8, 8, u64> imm_a;
BitField<20, 12, u64> imm_b;
BitField<42, 1, u64> neg_pred;
BitField<39, 3, IR::Pred> pred;
} const bar{insn};
const Mode mode{[insn] {
switch (insn & 0x0000009B00000000ULL) {
case 0x0000000200000000ULL:
return Mode::RedPopc;
case 0x0000000300000000ULL:
return Mode::Scan;
case 0x0000000A00000000ULL:
return Mode::RedAnd;
case 0x0000001200000000ULL:
return Mode::RedOr;
case 0x0000008000000000ULL:
return Mode::Sync;
case 0x0000008100000000ULL:
return Mode::Arrive;
}
throw NotImplementedException("Invalid encoding");
}()};
if (mode != Mode::Sync) {
throw NotImplementedException("BAR mode {}", mode);
}
if (bar.is_a_imm == 0) {
throw NotImplementedException("Non-immediate input A");
}
if (bar.imm_a != 0) {
throw NotImplementedException("Non-zero input A");
}
if (bar.is_b_imm == 0) {
throw NotImplementedException("Non-immediate input B");
}
if (bar.imm_b != 0) {
throw NotImplementedException("Non-zero input B");
}
if (bar.pred != IR::Pred::PT && bar.neg_pred != 0) {
throw NotImplementedException("Non-true input predicate");
}
ir.Barrier();
}
} // namespace Shader::Maxwell