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dxil_converter.cpp
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dxil_converter.cpp
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/* Copyright (c) 2019-2022 Hans-Kristian Arntzen for Valve Corporation
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "opcodes/converter_impl.hpp"
#include "opcodes/opcodes_dxil_builtins.hpp"
#include "opcodes/opcodes_llvm_builtins.hpp"
#include "opcodes/dxil/dxil_common.hpp"
#include "opcodes/dxil/dxil_ags.hpp"
#include "opcodes/dxil/dxil_workgraph.hpp"
#include "dxil_converter.hpp"
#include "logging.hpp"
#include "node.hpp"
#include "node_pool.hpp"
#include "spirv_module.hpp"
#include <utility>
#include <algorithm>
namespace dxil_spv
{
Converter::Converter(LLVMBCParser &bitcode_parser_, LLVMBCParser *bitcode_reflection_parser_, SPIRVModule &module_)
{
impl = std::make_unique<Impl>(bitcode_parser_, bitcode_reflection_parser_, module_);
}
Converter::~Converter()
{
}
void Converter::add_local_root_constants(uint32_t register_space, uint32_t register_index, uint32_t num_words)
{
LocalRootSignatureEntry entry = {};
entry.type = LocalRootSignatureType::Constants;
entry.constants.num_words = num_words;
entry.constants.register_space = register_space;
entry.constants.register_index = register_index;
impl->local_root_signature.push_back(entry);
}
void Converter::add_local_root_descriptor(ResourceClass type, uint32_t register_space, uint32_t register_index)
{
LocalRootSignatureEntry entry = {};
entry.type = LocalRootSignatureType::Descriptor;
entry.descriptor.type = type;
entry.descriptor.register_space = register_space;
entry.descriptor.register_index = register_index;
impl->local_root_signature.push_back(entry);
}
void Converter::add_local_root_descriptor_table(Vector<DescriptorTableEntry> entries)
{
LocalRootSignatureEntry entry = {};
entry.type = LocalRootSignatureType::Table;
entry.table_entries = std::move(entries);
impl->local_root_signature.push_back(std::move(entry));
}
void Converter::add_local_root_descriptor_table(const DescriptorTableEntry *entries, size_t count)
{
add_local_root_descriptor_table({ entries, entries + count });
}
void Converter::get_workgroup_dimensions(uint32_t &x, uint32_t &y, uint32_t &z) const
{
x = impl->execution_mode_meta.workgroup_threads[0];
y = impl->execution_mode_meta.workgroup_threads[1];
z = impl->execution_mode_meta.workgroup_threads[2];
}
uint32_t Converter::get_patch_vertex_count() const
{
return impl->execution_mode_meta.stage_input_num_vertex;
}
void Converter::get_compute_wave_size_range(uint32_t &min, uint32_t &max, uint32_t &preferred) const
{
min = impl->execution_mode_meta.wave_size_min;
max = impl->execution_mode_meta.wave_size_max;
preferred = impl->execution_mode_meta.wave_size_preferred;
}
uint32_t Converter::get_compute_heuristic_max_wave_size() const
{
if (impl->execution_mode_meta.wave_size_min)
return 0;
return impl->execution_mode_meta.heuristic_max_wave_size;
}
bool Converter::shader_requires_feature(ShaderFeature feature) const
{
switch (feature)
{
case ShaderFeature::Native16BitOperations:
return impl->builder().hasCapability(spv::CapabilityFloat16) ||
impl->builder().hasCapability(spv::CapabilityInt16);
default:
return false;
}
}
bool Converter::get_driver_version(uint32_t &driver_id, uint32_t &driver_version) const
{
if (impl->options.driver_version == 0)
return false;
driver_id = impl->options.driver_id;
driver_version = impl->options.driver_version;
return true;
}
ConvertedFunction Converter::convert_entry_point()
{
return impl->convert_entry_point();
}
template <typename T = uint32_t>
static T get_constant_metadata(const llvm::MDNode *node, unsigned index)
{
return T(
llvm::cast<llvm::ConstantAsMetadata>(node->getOperand(index))->getValue()->getUniqueInteger().getSExtValue());
}
static String get_string_metadata(const llvm::MDNode *node, unsigned index)
{
#ifdef HAVE_LLVMBC
return llvm::cast<llvm::MDString>(node->getOperand(index))->getString();
#else
std::string tmp = llvm::cast<llvm::MDString>(node->getOperand(index))->getString();
String str(tmp.begin(), tmp.end());
return str;
#endif
}
static String get_resource_name_metadata(const llvm::MDNode *node, const llvm::MDNode *reflections)
{
if (reflections)
{
unsigned bind_space = get_constant_metadata(node, 3);
unsigned bind_register = get_constant_metadata(node, 4);
unsigned num_operands = reflections->getNumOperands();
for (unsigned i = 0; i < num_operands; i++)
{
auto *refl_node = llvm::cast<llvm::MDNode>(reflections->getOperand(i));
if (get_constant_metadata(refl_node, 3) == bind_space &&
get_constant_metadata(refl_node, 4) == bind_register)
{
return get_string_metadata(refl_node, 2);
}
}
}
return get_string_metadata(node, 2);
}
static spv::Dim image_dimension_from_resource_kind(DXIL::ResourceKind kind)
{
switch (kind)
{
case DXIL::ResourceKind::Texture1D:
case DXIL::ResourceKind::Texture1DArray:
return spv::Dim1D;
case DXIL::ResourceKind::Texture2D:
case DXIL::ResourceKind::Texture2DMS:
case DXIL::ResourceKind::Texture2DArray:
case DXIL::ResourceKind::Texture2DMSArray:
case DXIL::ResourceKind::FeedbackTexture2D:
case DXIL::ResourceKind::FeedbackTexture2DArray:
return spv::Dim2D;
case DXIL::ResourceKind::Texture3D:
return spv::Dim3D;
case DXIL::ResourceKind::TextureCube:
case DXIL::ResourceKind::TextureCubeArray:
return spv::DimCube;
case DXIL::ResourceKind::TypedBuffer:
case DXIL::ResourceKind::StructuredBuffer:
case DXIL::ResourceKind::RawBuffer:
return spv::DimBuffer;
default:
return spv::DimMax;
}
}
static bool image_dimension_is_arrayed(DXIL::ResourceKind kind)
{
switch (kind)
{
case DXIL::ResourceKind::Texture1DArray:
case DXIL::ResourceKind::Texture2DArray:
case DXIL::ResourceKind::Texture2DMSArray:
case DXIL::ResourceKind::TextureCubeArray:
case DXIL::ResourceKind::FeedbackTexture2DArray:
return true;
default:
return false;
}
}
static bool image_dimension_is_multisampled(DXIL::ResourceKind kind)
{
switch (kind)
{
case DXIL::ResourceKind::Texture2DMS:
case DXIL::ResourceKind::Texture2DMSArray:
return true;
default:
return false;
}
}
static DXIL::ComponentType convert_16bit_component_to_32bit(DXIL::ComponentType type)
{
switch (type)
{
case DXIL::ComponentType::F16:
return DXIL::ComponentType::F32;
case DXIL::ComponentType::I16:
return DXIL::ComponentType::I32;
case DXIL::ComponentType::U16:
return DXIL::ComponentType::U32;
default:
return type;
}
}
static DXIL::ComponentType convert_component_to_unsigned(DXIL::ComponentType type)
{
switch (type)
{
case DXIL::ComponentType::I16:
return DXIL::ComponentType::U16;
case DXIL::ComponentType::I32:
return DXIL::ComponentType::U32;
case DXIL::ComponentType::I64:
return DXIL::ComponentType::U64;
default:
return type;
}
}
static DXIL::ComponentType normalize_component_type(DXIL::ComponentType type)
{
switch (type)
{
case DXIL::ComponentType::UNormF16:
case DXIL::ComponentType::SNormF16:
return DXIL::ComponentType::F16;
case DXIL::ComponentType::UNormF32:
case DXIL::ComponentType::SNormF32:
return DXIL::ComponentType::F32;
case DXIL::ComponentType::UNormF64:
case DXIL::ComponentType::SNormF64:
return DXIL::ComponentType::F64;
default:
return type;
}
}
static spv::Id build_ssbo_runtime_array_type(Converter::Impl &impl, RawType type, unsigned bits, unsigned vecsize,
unsigned range_size, const String &name)
{
auto &builder = impl.builder();
spv::Id value_type = type == RawType::Integer ? builder.makeUintType(bits) : builder.makeFloatType(bits);
if (vecsize > 1)
value_type = builder.makeVectorType(value_type, vecsize);
spv::Id element_array_type = builder.makeRuntimeArray(value_type);
builder.addDecoration(element_array_type, spv::DecorationArrayStride, vecsize * (bits / 8));
spv::Id block_type_id = impl.get_struct_type({ element_array_type }, 0, name.c_str());
builder.addMemberDecoration(block_type_id, 0, spv::DecorationOffset, 0);
builder.addDecoration(block_type_id, spv::DecorationBlock);
spv::Id type_id = block_type_id;
if (range_size != 1)
{
assert(range_size != 0);
if (range_size == ~0u)
type_id = builder.makeRuntimeArray(type_id);
else
type_id = builder.makeArrayType(type_id, builder.makeUintConstant(range_size), 0);
}
return type_id;
}
Vector<Converter::Impl::RawDeclarationVariable>
Converter::Impl::create_bindless_heap_variable_alias_group(const BindlessInfo &base_info,
const Vector<RawDeclaration> &raw_decls)
{
Vector<RawDeclarationVariable> decls;
decls.reserve(raw_decls.size());
for (auto &decl : raw_decls)
{
RawDeclarationVariable var = {};
var.declaration = decl;
auto info = base_info;
info.component = raw_width_to_component_type(decl.type, decl.width);
info.raw_vecsize = decl.vecsize;
var.var_id = create_bindless_heap_variable(info);
decls.push_back(var);
}
return decls;
}
spv::Id Converter::Impl::create_ubo_variable(const RawDeclaration &raw_decl, uint32_t range_size, const String &name,
unsigned cbv_size)
{
auto &builder = spirv_module.get_builder();
unsigned element_size = raw_width_to_bits(raw_decl.width) * raw_vecsize_to_vecsize(raw_decl.vecsize) / 8;
unsigned array_length = (cbv_size + element_size - 1) / element_size;
// It seems like we will have to bitcast ourselves away from vec4 here after loading.
spv::Id size_id = builder.makeUintConstant(array_length, false);
unsigned bits = raw_width_to_bits(raw_decl.width);
spv::Id element_type = raw_decl.type == RawType::Float ? builder.makeFloatType(bits) : builder.makeUintType(bits);
if (raw_decl.vecsize != RawVecSize::V1)
element_type = builder.makeVectorType(element_type, raw_vecsize_to_vecsize(raw_decl.vecsize));
spv::Id member_array_type = builder.makeArrayType(element_type, size_id, element_size);
builder.addDecoration(member_array_type, spv::DecorationArrayStride, element_size);
auto ubo_block_name = name.empty() ? "" : (name + "UBO");
spv::Id type_id = get_struct_type({ member_array_type }, 0, ubo_block_name.c_str());
builder.addMemberDecoration(type_id, 0, spv::DecorationOffset, 0);
builder.addDecoration(type_id, spv::DecorationBlock);
if (range_size != 1)
{
if (range_size == ~0u)
type_id = builder.makeRuntimeArray(type_id);
else
type_id = builder.makeArrayType(type_id, builder.makeUintConstant(range_size), 0);
}
if (raw_decl.width == RawWidth::B16)
builder.addCapability(spv::CapabilityUniformAndStorageBuffer16BitAccess);
return create_variable(spv::StorageClassUniform,
type_id, name.empty() ? nullptr : name.c_str());
}
spv::Id Converter::Impl::create_raw_ssbo_variable(const RawDeclaration &raw_decl, uint32_t range_size, const String &name)
{
spv::Id type_id = build_ssbo_runtime_array_type(*this,
raw_decl.type,
raw_width_to_bits(raw_decl.width),
raw_vecsize_to_vecsize(raw_decl.vecsize),
range_size, name + "SSBO");
if (raw_decl.width == RawWidth::B16)
builder().addCapability(spv::CapabilityStorageBuffer16BitAccess);
return create_variable(spv::StorageClassStorageBuffer, type_id, name.empty() ? nullptr : name.c_str());
}
Vector<Converter::Impl::RawDeclarationVariable> Converter::Impl::create_raw_ssbo_variable_alias_group(
const Vector<RawDeclaration> &raw_decls,
uint32_t range_size, const String &name)
{
Vector<RawDeclarationVariable> group;
group.reserve(raw_decls.size());
for (auto &decl : raw_decls)
group.push_back({ decl, create_raw_ssbo_variable(decl, range_size, name) });
return group;
}
Vector<Converter::Impl::RawDeclarationVariable> Converter::Impl::create_ubo_variable_alias_group(
const Vector<RawDeclaration> &raw_decls,
uint32_t range_size, const String &name, unsigned cbv_size)
{
Vector<RawDeclarationVariable> group;
group.reserve(raw_decls.size());
for (auto &decl : raw_decls)
group.push_back({ decl, create_ubo_variable(decl, range_size, name, cbv_size) });
return group;
}
spv::Id Converter::Impl::create_bindless_heap_variable(const BindlessInfo &info)
{
auto itr = std::find_if(bindless_resources.begin(), bindless_resources.end(), [&](const BindlessResource &resource) {
return
resource.info.type == info.type &&
resource.info.component == info.component &&
resource.info.raw_vecsize == info.raw_vecsize &&
resource.info.kind == info.kind &&
resource.info.desc_set == info.desc_set &&
resource.info.format == info.format &&
resource.info.binding == info.binding &&
resource.info.uav_read == info.uav_read &&
resource.info.uav_written == info.uav_written &&
resource.info.uav_coherent == info.uav_coherent &&
resource.info.relaxed_precision == info.relaxed_precision &&
resource.info.aliased == info.aliased &&
resource.info.counters == info.counters &&
resource.info.offsets == info.offsets &&
resource.info.descriptor_type == info.descriptor_type;
});
if (itr != bindless_resources.end())
{
return itr->var_id;
}
else
{
BindlessResource resource = {};
resource.info = info;
spv::Id type_id = 0;
auto storage = spv::StorageClassMax;
switch (info.type)
{
case DXIL::ResourceType::SRV:
{
if (info.kind == DXIL::ResourceKind::RTAccelerationStructure)
{
if (info.descriptor_type == VulkanDescriptorType::SSBO)
{
type_id = build_ssbo_runtime_array_type(*this, RawType::Integer, 32, 2, 1, "RTASHeap");
storage = spv::StorageClassStorageBuffer;
}
else
{
type_id = builder().makeAccelerationStructureType();
type_id = builder().makeRuntimeArray(type_id);
storage = spv::StorageClassUniformConstant;
}
}
else if (info.descriptor_type == VulkanDescriptorType::SSBO)
{
RawType raw_type = raw_component_type_to_type(info.component);
unsigned bits = raw_component_type_to_bits(info.component);
if (info.offsets)
type_id = build_ssbo_runtime_array_type(*this, raw_type, 32, 2, 1, "SSBO_Offsets");
else
type_id = build_ssbo_runtime_array_type(*this, raw_type, bits, raw_vecsize_to_vecsize(info.raw_vecsize),
~0u, "SSBO");
storage = spv::StorageClassStorageBuffer;
if (bits == 16)
builder().addCapability(spv::CapabilityStorageBuffer16BitAccess);
}
else
{
if (info.component != DXIL::ComponentType::U32 &&
info.component != DXIL::ComponentType::I32 &&
info.component != DXIL::ComponentType::F32)
{
LOGE("Invalid component type for image.\n");
return 0;
}
spv::Id sampled_type_id = get_type_id(info.component, 1, 1);
type_id = builder().makeImageType(sampled_type_id, image_dimension_from_resource_kind(info.kind), false,
image_dimension_is_arrayed(info.kind),
image_dimension_is_multisampled(info.kind), 1, spv::ImageFormatUnknown);
type_id = builder().makeRuntimeArray(type_id);
storage = spv::StorageClassUniformConstant;
}
break;
}
case DXIL::ResourceType::UAV:
{
if (info.counters)
{
spv::Id uint_type = builder().makeUintType(32);
spv::Id uvec2_type = builder().makeVectorType(uint_type, 2);
spv::Id runtime_array_type_id = builder().makeRuntimeArray(uvec2_type);
builder().addDecoration(runtime_array_type_id, spv::DecorationArrayStride, sizeof(uint64_t));
type_id = get_struct_type({ runtime_array_type_id }, 0, "AtomicCounters");
builder().addDecoration(type_id, spv::DecorationBlock);
builder().addMemberName(type_id, 0, "counters");
builder().addMemberDecoration(type_id, 0, spv::DecorationOffset, 0);
builder().addMemberDecoration(type_id, 0, spv::DecorationNonWritable);
storage = spv::StorageClassStorageBuffer;
}
else if (info.descriptor_type == VulkanDescriptorType::SSBO)
{
RawType raw_type = raw_component_type_to_type(info.component);
unsigned bits = raw_component_type_to_bits(info.component);
type_id = build_ssbo_runtime_array_type(*this, raw_type, bits, raw_vecsize_to_vecsize(info.raw_vecsize),
~0u, "SSBO");
storage = spv::StorageClassStorageBuffer;
if (bits == 16)
builder().addCapability(spv::CapabilityStorageBuffer16BitAccess);
}
else
{
if (info.component != DXIL::ComponentType::U32 &&
info.component != DXIL::ComponentType::I32 &&
info.component != DXIL::ComponentType::F32 &&
info.component != DXIL::ComponentType::U64)
{
LOGE("Invalid component type for image.\n");
return 0;
}
spv::Id sampled_type_id = get_type_id(info.component, 1, 1);
type_id = builder().makeImageType(sampled_type_id, image_dimension_from_resource_kind(info.kind), false,
image_dimension_is_arrayed(info.kind),
image_dimension_is_multisampled(info.kind), 2, info.format);
type_id = builder().makeRuntimeArray(type_id);
storage = spv::StorageClassUniformConstant;
}
break;
}
case DXIL::ResourceType::Sampler:
type_id = builder().makeSamplerType();
type_id = builder().makeRuntimeArray(type_id);
storage = spv::StorageClassUniformConstant;
break;
case DXIL::ResourceType::CBV:
{
RawType raw_type = raw_component_type_to_type(info.component);
unsigned bits = raw_component_type_to_bits(info.component);
unsigned vecsize = raw_vecsize_to_vecsize(info.raw_vecsize);
type_id = raw_type == RawType::Float ? builder().makeFloatType(bits) : builder().makeUintType(bits);
if (vecsize > 1)
type_id = builder().makeVectorType(type_id, vecsize);
unsigned element_size = (bits / 8) * vecsize;
unsigned num_elements = 0x10000 / element_size;
type_id = builder().makeArrayType(type_id, builder().makeUintConstant(num_elements), element_size);
builder().addDecoration(type_id, spv::DecorationArrayStride, element_size);
type_id = get_struct_type({ type_id }, 0, "BindlessCBV");
builder().addDecoration(type_id, spv::DecorationBlock);
if (options.bindless_cbv_ssbo_emulation)
builder().addMemberDecoration(type_id, 0, spv::DecorationNonWritable);
builder().addMemberDecoration(type_id, 0, spv::DecorationOffset, 0);
type_id = builder().makeRuntimeArray(type_id);
storage = options.bindless_cbv_ssbo_emulation ? spv::StorageClassStorageBuffer : spv::StorageClassUniform;
if (bits == 16)
{
if (options.bindless_cbv_ssbo_emulation)
builder().addCapability(spv::CapabilityStorageBuffer16BitAccess);
else
builder().addCapability(spv::CapabilityUniformAndStorageBuffer16BitAccess);
}
break;
}
default:
return 0;
}
builder().addExtension("SPV_EXT_descriptor_indexing");
builder().addCapability(spv::CapabilityRuntimeDescriptorArrayEXT);
resource.var_id = create_variable(storage, type_id);
auto &meta = handle_to_resource_meta[resource.var_id];
meta = {};
meta.kind = info.kind;
meta.component_type = info.component;
meta.raw_component_vecsize = info.raw_vecsize;
meta.var_id = resource.var_id;
meta.storage = storage;
builder().addDecoration(resource.var_id, spv::DecorationDescriptorSet, info.desc_set);
builder().addDecoration(resource.var_id, spv::DecorationBinding, info.binding);
if (info.relaxed_precision)
{
builder().addDecoration(resource.var_id, spv::DecorationRelaxedPrecision);
// Signal the intended component type.
switch (meta.component_type)
{
case DXIL::ComponentType::F32:
meta.component_type = DXIL::ComponentType::F16;
break;
case DXIL::ComponentType::I32:
meta.component_type = DXIL::ComponentType::I16;
break;
case DXIL::ComponentType::U32:
meta.component_type = DXIL::ComponentType::U16;
break;
default:
break;
}
}
if (info.type == DXIL::ResourceType::UAV && !info.counters)
{
if (!info.uav_read)
builder().addDecoration(resource.var_id, spv::DecorationNonReadable);
if (!info.uav_written)
builder().addDecoration(resource.var_id, spv::DecorationNonWritable);
if (info.uav_coherent)
builder().addDecoration(resource.var_id, spv::DecorationCoherent);
}
else if (info.counters)
{
builder().addDecoration(resource.var_id, spv::DecorationAliasedPointer);
}
else if (info.type == DXIL::ResourceType::SRV && info.descriptor_type == VulkanDescriptorType::SSBO)
{
builder().addDecoration(resource.var_id, spv::DecorationNonWritable);
builder().addDecoration(resource.var_id, spv::DecorationRestrict);
}
// The default in Vulkan environment is Restrict.
if (info.aliased && info.type == DXIL::ResourceType::UAV)
builder().addDecoration(resource.var_id, spv::DecorationAliased);
bindless_resources.push_back(resource);
return resource.var_id;
}
}
Converter::Impl::ResourceVariableMeta Converter::Impl::get_resource_variable_meta(const llvm::MDNode *resource) const
{
ResourceVariableMeta meta = {};
if (!resource)
return meta;
if (const auto *variable = llvm::dyn_cast<llvm::ConstantAsMetadata>(resource->getOperand(1)))
{
const llvm::Value *val = variable->getValue();
const auto *global = llvm::dyn_cast<llvm::GlobalVariable>(val);
// It's possible that the variable is a constexpr bitcast, so resolve those ...
while (!global && val)
{
auto *constexpr_op = llvm::dyn_cast<llvm::ConstantExpr>(val);
val = nullptr;
if (constexpr_op && constexpr_op->getOpcode() == llvm::UnaryOperator::BitCast)
{
val = constexpr_op->getOperand(0);
global = llvm::dyn_cast<llvm::GlobalVariable>(val);
}
}
if (global)
{
meta.is_lib_variable = true;
meta.is_active = llvm_active_global_resource_variables.count(global) != 0;
return meta;
}
}
meta.is_active = true;
return meta;
}
void Converter::Impl::register_resource_meta_reference(const llvm::MDOperand &operand, DXIL::ResourceType type, unsigned index)
{
// In RT shaders, apps will load dummy structs from global variables.
// Here we get the chance to redirect them towards the resource meta declaration.
if (operand)
{
auto *value = llvm::cast<llvm::ConstantAsMetadata>(operand)->getValue();
// In lib_6_6, this is somehow a bitcasted pointer expression, sigh ...
// Drill deep until we actually find the original resource.
while (auto *cexpr = llvm::dyn_cast<llvm::ConstantExpr>(value))
{
if (cexpr->getOpcode() == llvm::Instruction::BitCast)
value = cexpr->getOperand(0);
else
break;
}
auto *global_variable = llvm::dyn_cast<llvm::GlobalVariable>(value);
if (global_variable)
llvm_global_variable_to_resource_mapping[global_variable] = { type, index, nullptr, global_variable, false };
}
}
bool Converter::Impl::emit_resources_global_mapping(DXIL::ResourceType type, const llvm::MDNode *node)
{
unsigned num_resources = node->getNumOperands();
for (unsigned i = 0; i < num_resources; i++)
{
auto *resource = llvm::cast<llvm::MDNode>(node->getOperand(i));
unsigned index = get_constant_metadata(resource, 0);
if (type == DXIL::ResourceType::UAV)
{
unsigned bind_space = get_constant_metadata(resource, 3);
auto resource_kind = static_cast<DXIL::ResourceKind>(get_constant_metadata(resource, 6));
if (bind_space == AgsUAVMagicRegisterSpace && resource_kind == DXIL::ResourceKind::RawBuffer)
ags.uav_magic_resource_type_index = index;
}
register_resource_meta_reference(resource->getOperand(1), type, index);
}
return true;
}
spv::Id Converter::Impl::get_physical_pointer_block_type(spv::Id base_type_id, const PhysicalPointerMeta &meta)
{
auto itr = std::find_if(physical_pointer_entries.begin(), physical_pointer_entries.end(), [&](const PhysicalPointerEntry &entry) {
return entry.meta.coherent == meta.coherent &&
entry.meta.nonreadable == meta.nonreadable &&
entry.meta.nonwritable == meta.nonwritable &&
entry.meta.size == meta.size &&
entry.meta.stride == meta.stride &&
entry.base_type_id == base_type_id;
});
if (itr != physical_pointer_entries.end())
return itr->ptr_type_id;
int vecsize = builder().getNumTypeComponents(base_type_id);
int width = builder().getScalarTypeWidth(base_type_id);
spv::Op op = builder().getTypeClass(base_type_id);
if (op == spv::OpTypeVector)
op = builder().getTypeClass(builder().getScalarTypeId(base_type_id));
String type = "PhysicalPointer";
switch (op)
{
case spv::OpTypeFloat:
if (width == 16)
type += "Half";
else if (width == 32)
type += "Float";
else if (width == 64)
type += "Double";
break;
case spv::OpTypeInt:
if (width == 16)
type += "Ushort";
else if (width == 32)
type += "Uint";
else if (width == 64)
type += "Uint64";
break;
default:
break;
}
if (vecsize > 1)
type += std::to_string(vecsize).c_str();
if (meta.nonwritable)
type += "NonWrite";
if (meta.nonreadable)
type += "NonRead";
if (meta.coherent)
type += "Coherent";
spv::Id type_id = base_type_id;
if (meta.stride > 0)
{
if (meta.size == 0)
{
type_id = builder().makeRuntimeArray(type_id);
type += "Array";
}
else
{
type_id = builder().makeArrayType(type_id, builder().makeUintConstant(meta.size / meta.stride),
meta.stride);
type += "CBVArray";
}
builder().addDecoration(type_id, spv::DecorationArrayStride, meta.stride);
}
spv::Id block_type_id = builder().makeStructType({ type_id }, type.c_str());
builder().addMemberDecoration(block_type_id, 0, spv::DecorationOffset, 0);
builder().addMemberName(block_type_id, 0, "value");
builder().addDecoration(block_type_id, spv::DecorationBlock);
if (meta.nonwritable)
builder().addMemberDecoration(block_type_id, 0, spv::DecorationNonWritable);
if (meta.nonreadable)
builder().addMemberDecoration(block_type_id, 0, spv::DecorationNonReadable);
if (meta.coherent)
builder().addMemberDecoration(block_type_id, 0, spv::DecorationCoherent);
spv::Id ptr_type_id = builder().makePointer(spv::StorageClassPhysicalStorageBuffer, block_type_id);
PhysicalPointerEntry new_entry = {};
new_entry.ptr_type_id = ptr_type_id;
new_entry.base_type_id = base_type_id;
new_entry.meta = meta;
physical_pointer_entries.push_back(new_entry);
return ptr_type_id;
}
static bool component_type_is_16bit(DXIL::ComponentType type)
{
switch (type)
{
case DXIL::ComponentType::F16:
case DXIL::ComponentType::I16:
case DXIL::ComponentType::U16:
return true;
default:
return false;
}
}
bool Converter::Impl::analyze_aliased_access(const AccessTracking &tracking,
VulkanDescriptorType descriptor_type,
AliasedAccess &aliased_access) const
{
bool raw_access_16bit = false;
bool raw_access_64bit = false;
for (int type_ = 0; type_ < int(RawType::Count); type_++)
{
for (int width_ = 0; width_ < int(RawWidth::Count); width_++)
{
auto width = RawWidth(width_);
if (width == RawWidth::B16 && !execution_mode_meta.native_16bit_operations)
continue;
for (int vecsize_ = 0; vecsize_ < int(RawVecSize::Count); vecsize_++)
{
auto vecsize = RawVecSize(vecsize_);
auto type = RawType(type_);
// Non-native 16-bit SSBOs are declared as 32-bit, so avoid false aliases.
bool has_decl = tracking.raw_access_buffer_declarations[type_][width_][vecsize_];
if (!has_decl && RawWidth(width) == RawWidth::B32 && !execution_mode_meta.native_16bit_operations)
has_decl = tracking.raw_access_buffer_declarations[type_][unsigned(RawWidth::B16)][vecsize_];
if (has_decl)
{
if (width == RawWidth::B16)
raw_access_16bit = true;
else if (width == RawWidth::B64)
raw_access_64bit = true;
aliased_access.raw_declarations.push_back({ type, width, vecsize });
aliased_access.primary_component_type = raw_width_to_component_type(type, width);
aliased_access.primary_raw_vecsize = vecsize;
}
}
}
}
if (raw_access_16bit &&
descriptor_type != VulkanDescriptorType::SSBO &&
descriptor_type != VulkanDescriptorType::UBO &&
descriptor_type != VulkanDescriptorType::BufferDeviceAddress)
{
LOGE("Raw 16-bit load-store was used, which must be implemented with SSBO, UBO or BDA.\n");
return false;
}
if (raw_access_64bit &&
descriptor_type != VulkanDescriptorType::SSBO &&
descriptor_type != VulkanDescriptorType::UBO &&
descriptor_type != VulkanDescriptorType::BufferDeviceAddress)
{
LOGE("Raw 64-bit load-store was used, which must be implemented with SSBO, UBO or BDA.\n");
return false;
}
// Only SSBO and UBO can be reclared with different types.
// Typed descriptors are always scalar.
aliased_access.requires_alias_decoration = (descriptor_type == VulkanDescriptorType::SSBO ||
descriptor_type == VulkanDescriptorType::UBO) &&
aliased_access.raw_declarations.size() > 1;
// If we only emit one 16-bit or 64-bit SSBO/UBO, we need to override the component type of that meta declaration.
aliased_access.override_primary_component_types = (descriptor_type == VulkanDescriptorType::SSBO ||
descriptor_type == VulkanDescriptorType::UBO) &&
aliased_access.raw_declarations.size() == 1;
// If the SSBO is never actually accessed (UAV counters for example), fudge the default type.
if (descriptor_type == VulkanDescriptorType::SSBO && aliased_access.raw_declarations.empty())
aliased_access.raw_declarations.push_back({ RawType::Integer, RawWidth::B32, RawVecSize::V1 });
// If the CBV is never actually accessed, fudge the default legacy CBV type.
if (descriptor_type == VulkanDescriptorType::UBO && aliased_access.raw_declarations.empty())
aliased_access.raw_declarations.push_back({ RawType::Float, RawWidth::B32, RawVecSize::V4 });
// Safeguard against unused variables where we never end up setting any primary component type.
if ((descriptor_type == VulkanDescriptorType::SSBO ||
descriptor_type == VulkanDescriptorType::UBO) &&
aliased_access.raw_declarations.size() == 1)
{
aliased_access.primary_component_type =
raw_width_to_component_type(aliased_access.raw_declarations.front().type, aliased_access.raw_declarations.front().width);
aliased_access.primary_raw_vecsize = aliased_access.raw_declarations.front().vecsize;
aliased_access.override_primary_component_types = true;
}
return true;
}
bool Converter::Impl::emit_srvs(const llvm::MDNode *srvs, const llvm::MDNode *refl)
{
auto &builder = spirv_module.get_builder();
unsigned num_srvs = srvs->getNumOperands();
for (unsigned i = 0; i < num_srvs; i++)
{
auto *srv = llvm::cast<llvm::MDNode>(srvs->getOperand(i));
auto var_meta = get_resource_variable_meta(srv);
if (!var_meta.is_active)
continue;
unsigned index = get_constant_metadata(srv, 0);
auto name = get_resource_name_metadata(srv, refl);
unsigned bind_space = get_constant_metadata(srv, 3);
unsigned bind_register = get_constant_metadata(srv, 4);
unsigned range_size = get_constant_metadata(srv, 5);
auto resource_kind = static_cast<DXIL::ResourceKind>(get_constant_metadata(srv, 6));
llvm::MDNode *tags = nullptr;
if (srv->getNumOperands() >= 9 && srv->getOperand(8))
tags = llvm::dyn_cast<llvm::MDNode>(srv->getOperand(8));
auto actual_component_type = DXIL::ComponentType::U32;
auto effective_component_type = actual_component_type;
unsigned stride = 0;
if (tags && get_constant_metadata(tags, 0) == 0)
{
// Sampled format.
actual_component_type = normalize_component_type(static_cast<DXIL::ComponentType>(get_constant_metadata(tags, 1)));
effective_component_type = get_effective_typed_resource_type(actual_component_type);
}
else
{
// Structured/Raw buffers, just use uint for good measure, we'll bitcast as needed.
// Field 1 is stride, but we don't care about that unless we will support an SSBO path.
if (tags)
stride = get_constant_metadata(tags, 1);
}
unsigned alignment = resource_kind == DXIL::ResourceKind::RawBuffer ? 16 : (stride & -int(stride));
DescriptorTableEntry local_table_entry = {};
int local_root_signature_entry = get_local_root_signature_entry(
ResourceClass::SRV, bind_space, bind_register, local_table_entry);
bool need_resource_remapping = local_root_signature_entry < 0 ||
local_root_signature[local_root_signature_entry].type == LocalRootSignatureType::Table;
D3DBinding d3d_binding = {
get_remapping_stage(execution_model), resource_kind, index, bind_space, bind_register, range_size, alignment,
};
VulkanSRVBinding vulkan_binding = { { bind_space, bind_register }, {} };
if (need_resource_remapping && resource_mapping_iface && !resource_mapping_iface->remap_srv(d3d_binding, vulkan_binding))
{
LOGE("Failed to remap SRV %u:%u.\n", bind_space, bind_register);
return false;
}
auto &access_meta = srv_access_tracking[index];