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namespace spirv { template<typename M, typename T, typename StorageClass> [[vk::ext_instruction(/*spv::OpAccessChain*/65)]] vk::SpirvOpaqueType</* OpTypePointer*/ 32,StorageClass,M> accessChain([[vk::ext_reference]] vk::SpirvOpaqueType</* OpTypePointer*/ 32,StorageClass,T> base, [[vk::ext_literal]] uint32_t index0); //! There should be some intrinsic to get the SPIR-V result ID of any type's declaration #if 0 template<class T> [[vk::ext_instruction(/*spv::OpMemberDecorate*/72)]] void memberDecorate(T, [[vk::ext_literal]] uint32_t index, [[vk::ext_literal]] uint32_t decoration, [[vk::ext_literal]] uint32_t dec0); #endif template<class T, class U> [[vk::ext_instruction(/*spv::OpBitcast*/124)]] T bitcast(U); } namespace bda { namespace impl { template<typename T, typename P, uint32_t alignment> [[vk::ext_capability(/*PhysicalStorageBufferAddresses */ 5347 )]] [[vk::ext_instruction( /*OpLoad*/61 )]] T load(P pointer, [[vk::ext_literal]] uint32_t __aligned=/*Aligned*/0x00000002, [[vk::ext_literal]] uint32_t __alignment=alignment); template<typename T, typename P, uint32_t alignment> [[vk::ext_capability(/*PhysicalStorageBufferAddresses */ 5347 )]] [[vk::ext_instruction( /*OpStore*/62 )]] void store(P pointer, [[vk::ext_reference]] T obj, [[vk::ext_literal]] uint32_t __aligned=/*Aligned*/0x00000002, [[vk::ext_literal]] uint32_t __alignment=alignment); // TODO: atomics for different types ? } template<typename T, uint32_t alignment, bool _restrict> struct __base_ref { // TODO: // static_assert(alignment>=alignof(T)); using spv_ptr_t = vk::SpirvOpaqueType< /* OpTypePointer */ 32, /* PhysicalStorageBuffer */ vk::Literal<vk::integral_constant<uint,5349> >, T >; spv_ptr_t ptr; // TODO: Would like to use `spv_ptr_t` or OpAccessChain result instead of `uint64_t` void __init(const spv_ptr_t _ptr) { ptr = _ptr; } T load() { return impl::load<T,spv_ptr_t,alignment>(ptr); } void store(const T val) { impl::store<T,spv_ptr_t,alignment>(ptr); } }; template<typename T, uint32_t alignment/*=alignof(T)*/, bool _restrict=false> struct __ref : __base_ref<T,alignment,_restrict> { using base_t = __base_ref<T,alignment,_restrict>; using this_t = __ref<T,alignment,_restrict>; }; // TODO: explicit partial-specializations for types that support atomics // TODO: maybe make normal and restrict separate distinct types instead of templates template<typename T, bool _restrict=false> struct __ptr { using this_t = __ptr<T,_restrict>; uint64_t addr; static this_t create(const uint64_t _addr) { this_t retval; retval.addr = _addr; return retval; } template<uint32_t alignment> __ref<T,alignment,_restrict> deref() { // TODO: assert(addr&uint64_t(alignment-1)==0); using retval_t = __ref<T,alignment,_restrict>; retval_t retval; retval.__init(spirv::bitcast<typename retval_t::spv_ptr_t,uint64_t>(addr)); return retval; } }; } // TODO: want to autogenerate this with a macro struct Test { // The vk::ext_decorate don't seem to work or emit `OpMemberDecorate` at all [[vk::ext_decorate(/*Offset*/ 35,0)]] float4 mem1; [[vk::ext_decorate(/*Offset*/ 35,16)]] float mem2; [[vk::ext_decorate(/*Offset*/ 35,20)]] int mem3; }; // TODO: want to autogenerate these specializations template<uint32_t alignment, bool _restrict> struct bda::__ref<Test,alignment,_restrict> : __base_ref<Test,alignment,_restrict> { using base_t = __base_ref<Test,alignment,_restrict>; using this_t = __ref<Test,alignment,_restrict>; void __init(const typename base_t::spv_ptr_t _ptr) { base_t::__init(_ptr); // temporary workaround mem1.__init(spirv::bitcast<typename __decltype(mem1)::spv_ptr_t>(spirv::bitcast<uint64_t>(base_t::ptr)+0)); mem2.__init(spirv::bitcast<typename __decltype(mem2)::spv_ptr_t>(spirv::bitcast<uint64_t>(base_t::ptr)+16)); mem3.__init(spirv::bitcast<typename __decltype(mem3)::spv_ptr_t>(spirv::bitcast<uint64_t>(base_t::ptr)+20)); // versus what I'd really like // mem1.__init(spirv::accessChain<float4>(base_t::ptr,0)); // mem1.__init(spirv::accessChain<float4>(base_t::ptr,1)); // mem1.__init(spirv::accessChain<float4>(base_t::ptr,2)); } // pseudo members __ref<float4,/*impl::resolve_alignment_v<alignment,0>*/4,_restrict> mem1; __ref<float,/*impl::resolve_alignment_v<alignment,16>*/4,_restrict> mem2; __ref<int,/*impl::resolve_alignment_v<alignment,20>*/4,_restrict> mem3; }; StructuredBuffer<Test> mytests : register(t0, space0); ByteAddressBuffer byteBuffer : register(t1, space0); uint64_t address; struct PSInput { float4 color : COLOR; }; float4 PSMain(PSInput input) : SV_TARGET { // fatal error: generated SPIR-V is invalid: Structure id 7 decorated as Block for variable in PhysicalStorageBuffer storage class must follow relaxed storage buffer layout rules: member 0 is missing an Offset decoration // return vk::RawBufferLoad<Test>(address).mem1; return bda::__ptr<Test>(address).deref<8>().mem1.load(); }
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