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spirv_emit_context: Use atomic for fault buffer

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This commit is contained in:
IndecisiveTurtle 2025-07-17 16:07:14 +03:00
parent 34ce2723f8
commit a5e8aa960d
1 changed files with 22 additions and 24 deletions
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46
src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
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@ -1103,30 +1103,30 @@ Id EmitContext::DefineUfloatM5ToFloat32(u32 mantissa_bits, const std::string_vie
}
Id EmitContext::DefineGetBdaPointer() {
const auto caching_pagebits{
const Id caching_pagebits{
Constant(U64, static_cast<u64>(VideoCore::BufferCache::CACHING_PAGEBITS))};
const auto caching_pagemask{Constant(U64, VideoCore::BufferCache::CACHING_PAGESIZE - 1)};
const Id caching_pagemask{Constant(U64, VideoCore::BufferCache::CACHING_PAGESIZE - 1)};
const auto func_type{TypeFunction(U64, U64)};
const auto func{OpFunction(U64, spv::FunctionControlMask::MaskNone, func_type)};
const auto address{OpFunctionParameter(U64)};
const Id func_type{TypeFunction(U64, U64)};
const Id func{OpFunction(U64, spv::FunctionControlMask::MaskNone, func_type)};
const Id address{OpFunctionParameter(U64)};
Name(func, "get_bda_pointer");
AddLabel();
const auto fault_label{OpLabel()};
const auto available_label{OpLabel()};
const auto merge_label{OpLabel()};
const Id fault_label{OpLabel()};
const Id available_label{OpLabel()};
const Id merge_label{OpLabel()};
// Get page BDA
const auto page{OpShiftRightLogical(U64, address, caching_pagebits)};
const auto page32{OpUConvert(U32[1], page)};
const auto& bda_buffer{buffers[bda_pagetable_index]};
const auto [bda_buffer_id, bda_pointer_type] = bda_buffer.Alias(PointerType::U64);
const auto bda_ptr{OpAccessChain(bda_pointer_type, bda_buffer_id, u32_zero_value, page32)};
const auto bda{OpLoad(U64, bda_ptr)};
const Id page{OpShiftRightLogical(U64, address, caching_pagebits)};
const Id page32{OpUConvert(U32[1], page)};
const Id bda_ptr{OpAccessChain(bda_pointer_type, bda_buffer_id, u32_zero_value, page32)};
const Id bda{OpLoad(U64, bda_ptr)};
// Check if page is GPU cached
const auto is_fault{OpIEqual(U1[1], bda, u64_zero_value)};
const Id is_fault{OpIEqual(U1[1], bda, u64_zero_value)};
OpSelectionMerge(merge_label, spv::SelectionControlMask::MaskNone);
OpBranchConditional(is_fault, fault_label, available_label);
@ -1134,28 +1134,26 @@ Id EmitContext::DefineGetBdaPointer() {
AddLabel(fault_label);
const auto& fault_buffer{buffers[fault_buffer_index]};
const auto [fault_buffer_id, fault_pointer_type] = fault_buffer.Alias(PointerType::U32);
const auto page_div32{OpShiftRightLogical(U32[1], page32, ConstU32(5U))};
const auto page_mod32{OpBitwiseAnd(U32[1], page32, ConstU32(31U))};
const auto page_mask{OpShiftLeftLogical(U32[1], u32_one_value, page_mod32)};
const auto fault_ptr{
const Id page_div32{OpShiftRightLogical(U32[1], page32, ConstU32(5U))};
const Id page_mod32{OpBitwiseAnd(U32[1], page32, ConstU32(31U))};
const Id page_mask{OpShiftLeftLogical(U32[1], u32_one_value, page_mod32)};
const Id fault_ptr{
OpAccessChain(fault_pointer_type, fault_buffer_id, u32_zero_value, page_div32)};
const auto fault_value{OpLoad(U32[1], fault_ptr)};
const auto fault_value_masked{OpBitwiseOr(U32[1], fault_value, page_mask)};
OpStore(fault_ptr, fault_value_masked);
OpAtomicOr(U32[1], fault_ptr, ConstU32(u32(spv::Scope::Device)), u32_zero_value, page_mask);
// Return null pointer
const auto fallback_result{u64_zero_value};
const Id fallback_result{u64_zero_value};
OpBranch(merge_label);
// Value is available, compute address
AddLabel(available_label);
const auto offset_in_bda{OpBitwiseAnd(U64, address, caching_pagemask)};
const auto addr{OpIAdd(U64, bda, offset_in_bda)};
const Id offset_in_bda{OpBitwiseAnd(U64, address, caching_pagemask)};
const Id addr{OpIAdd(U64, bda, offset_in_bda)};
OpBranch(merge_label);
// Merge
AddLabel(merge_label);
const auto result{OpPhi(U64, addr, available_label, fallback_result, fault_label)};
const Id result{OpPhi(U64, addr, available_label, fallback_result, fault_label)};
OpReturnValue(result);
OpFunctionEnd();
return func;