shader: Implement bindless images

This commit is contained in:
ReinUsesLisp 2019-04-27 03:04:13 -03:00
parent 06c4ce8645
commit 9097301d92
3 changed files with 40 additions and 2 deletions

View file

@ -55,8 +55,9 @@ u32 ShaderIR::DecodeImage(NodeBlock& bb, u32 pc) {
coords.push_back(GetRegister(instr.gpr8.Value() + i));
}
ASSERT(instr.sust.is_immediate);
const auto& image{GetImage(instr.image, instr.sust.image_type)};
const auto type{instr.sust.image_type};
const auto& image{instr.sust.is_immediate ? GetImage(instr.image, type)
: GetBindlessImage(instr.gpr39, type)};
MetaImage meta{image, values};
const Node store{Operation(OperationCode::ImageStore, meta, std::move(coords))};
bb.push_back(store);
@ -86,4 +87,29 @@ const Image& ShaderIR::GetImage(Tegra::Shader::Image image, Tegra::Shader::Image
return *used_images.emplace(entry).first;
}
const Image& ShaderIR::GetBindlessImage(Tegra::Shader::Register reg,
Tegra::Shader::ImageType type) {
const Node image_register{GetRegister(reg)};
const Node base_image{
TrackCbuf(image_register, global_code, static_cast<s64>(global_code.size()))};
const auto cbuf{std::get_if<CbufNode>(base_image)};
const auto cbuf_offset_imm{std::get_if<ImmediateNode>(cbuf->GetOffset())};
const auto cbuf_offset{cbuf_offset_imm->GetValue()};
const auto cbuf_index{cbuf->GetIndex()};
const auto cbuf_key{(static_cast<u64>(cbuf_index) << 32) | static_cast<u64>(cbuf_offset)};
// If this image has already been used, return the existing mapping.
const auto itr{std::find_if(used_images.begin(), used_images.end(),
[=](const Image& entry) { return entry.GetOffset() == cbuf_key; })};
if (itr != used_images.end()) {
ASSERT(itr->GetType() == type);
return *itr;
}
// Otherwise create a new mapping for this image.
const std::size_t next_index{used_images.size()};
const Image entry{cbuf_index, cbuf_offset, next_index, type};
return *used_images.emplace(entry).first;
}
} // namespace VideoCommon::Shader

View file

@ -270,6 +270,15 @@ public:
explicit Image(std::size_t offset, std::size_t index, Tegra::Shader::ImageType type)
: offset{offset}, index{index}, type{type}, is_bindless{false} {}
explicit Image(u32 cbuf_index, u32 cbuf_offset, std::size_t index,
Tegra::Shader::ImageType type)
: offset{(static_cast<u64>(cbuf_index) << 32) | cbuf_offset}, index{index}, type{type},
is_bindless{true} {}
explicit Image(std::size_t offset, std::size_t index, Tegra::Shader::ImageType type,
bool is_bindless)
: offset{offset}, index{index}, type{type}, is_bindless{is_bindless} {}
std::size_t GetOffset() const {
return offset;
}

View file

@ -262,6 +262,9 @@ private:
/// Accesses an image.
const Image& GetImage(Tegra::Shader::Image image, Tegra::Shader::ImageType type);
/// Access a bindless image sampler.
const Image& GetBindlessImage(Tegra::Shader::Register reg, Tegra::Shader::ImageType type);
/// Extracts a sequence of bits from a node
Node BitfieldExtract(Node value, u32 offset, u32 bits);