vk_pipeline_cache: Avoid hashing and comparing dynamic state when possible

With extended dynamic states, some bytes don't have to be collected from
the pipeline key, hence we can avoid hashing and comparing them on
lookups.

src/video_core/renderer_vulkan/fixed_pipeline_state.cpp

@@ -39,7 +39,7 @@ constexpr std::array POLYGON_OFFSET_ENABLE_LUT = {
 
 } // Anonymous namespace
 
-void FixedPipelineState::Fill(const Maxwell& regs) {
+void FixedPipelineState::Fill(const Maxwell& regs, bool has_extended_dynamic_state) {
     const auto& clip = regs.view_volume_clip_control;
     const std::array enabled_lut = {regs.polygon_offset_point_enable,
                                     regs.polygon_offset_line_enable,
@@ -86,7 +86,10 @@ void FixedPipelineState::Fill(const Maxwell& regs) {
     std::transform(transform.begin(), transform.end(), viewport_swizzles.begin(),
                    [](const auto& viewport) { return static_cast<u16>(viewport.swizzle.raw); });
 
+    if (!has_extended_dynamic_state) {
+        no_extended_dynamic_state.Assign(1);
         dynamic_state.Fill(regs);
+    }
 }
 
 void FixedPipelineState::BlendingAttachment::Fill(const Maxwell& regs, std::size_t index) {
@@ -173,12 +176,12 @@ void FixedPipelineState::DynamicState::Fill(const Maxwell& regs) {
 }
 
 std::size_t FixedPipelineState::Hash() const noexcept {
-    const u64 hash = Common::CityHash64(reinterpret_cast<const char*>(this), sizeof *this);
+    const u64 hash = Common::CityHash64(reinterpret_cast<const char*>(this), Size());
     return static_cast<std::size_t>(hash);
 }
 
 bool FixedPipelineState::operator==(const FixedPipelineState& rhs) const noexcept {
-    return std::memcmp(this, &rhs, sizeof *this) == 0;
+    return std::memcmp(this, &rhs, Size()) == 0;
 }
 
 u32 FixedPipelineState::PackComparisonOp(Maxwell::ComparisonOp op) noexcept {

src/video_core/renderer_vulkan/fixed_pipeline_state.h

@@ -177,18 +177,19 @@ struct FixedPipelineState {
 
     union {
         u32 raw;
-        BitField<0, 1, u32> primitive_restart_enable;
-        BitField<1, 1, u32> depth_bias_enable;
-        BitField<2, 1, u32> depth_clamp_disabled;
-        BitField<3, 1, u32> ndc_minus_one_to_one;
-        BitField<4, 2, u32> polygon_mode;
-        BitField<6, 5, u32> patch_control_points_minus_one;
-        BitField<11, 2, u32> tessellation_primitive;
-        BitField<13, 2, u32> tessellation_spacing;
-        BitField<15, 1, u32> tessellation_clockwise;
-        BitField<16, 1, u32> logic_op_enable;
-        BitField<17, 4, u32> logic_op;
-        BitField<21, 1, u32> rasterize_enable;
+        BitField<0, 1, u32> no_extended_dynamic_state;
+        BitField<2, 1, u32> primitive_restart_enable;
+        BitField<3, 1, u32> depth_bias_enable;
+        BitField<4, 1, u32> depth_clamp_disabled;
+        BitField<5, 1, u32> ndc_minus_one_to_one;
+        BitField<6, 2, u32> polygon_mode;
+        BitField<8, 5, u32> patch_control_points_minus_one;
+        BitField<13, 2, u32> tessellation_primitive;
+        BitField<15, 2, u32> tessellation_spacing;
+        BitField<17, 1, u32> tessellation_clockwise;
+        BitField<18, 1, u32> logic_op_enable;
+        BitField<19, 4, u32> logic_op;
+        BitField<23, 1, u32> rasterize_enable;
     };
     u32 point_size;
     std::array<u32, Maxwell::NumVertexArrays> binding_divisors;
@@ -197,7 +198,7 @@ struct FixedPipelineState {
     std::array<u16, Maxwell::NumViewports> viewport_swizzles;
     DynamicState dynamic_state;
 
-    void Fill(const Maxwell& regs);
+    void Fill(const Maxwell& regs, bool has_extended_dynamic_state);
 
     std::size_t Hash() const noexcept;
 
@@ -206,6 +207,11 @@ struct FixedPipelineState {
     bool operator!=(const FixedPipelineState& rhs) const noexcept {
         return !operator==(rhs);
     }
+
+    std::size_t Size() const noexcept {
+        const std::size_t total_size = sizeof *this;
+        return total_size - (no_extended_dynamic_state != 0 ? 0 : sizeof(DynamicState));
+    }
 };
 static_assert(std::has_unique_object_representations_v<FixedPipelineState>);
 static_assert(std::is_trivially_copyable_v<FixedPipelineState>);

src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp

@@ -177,8 +177,22 @@ std::vector<vk::ShaderModule> VKGraphicsPipeline::CreateShaderModules(
 vk::Pipeline VKGraphicsPipeline::CreatePipeline(const RenderPassParams& renderpass_params,
                                                 const SPIRVProgram& program) const {
     const auto& state = fixed_state;
-    const auto& dynamic = fixed_state.dynamic_state;
-    const auto& viewport_swizzles = fixed_state.viewport_swizzles;
+    const auto& viewport_swizzles = state.viewport_swizzles;
+
+    FixedPipelineState::DynamicState dynamic;
+    if (device.IsExtExtendedDynamicStateSupported()) {
+        // Insert dummy values, as long as they are valid they don't matter as extended dynamic
+        // state is ignored
+        dynamic.raw1 = 0;
+        dynamic.raw2 = 0;
+        for (FixedPipelineState::VertexBinding& binding : dynamic.vertex_bindings) {
+            // Enable all vertex bindings
+            binding.raw = 0;
+            binding.enabled.Assign(1);
+        }
+    } else {
+        dynamic = state.dynamic_state;
+    }
 
     std::vector<VkVertexInputBindingDescription> vertex_bindings;
     std::vector<VkVertexInputBindingDivisorDescriptionEXT> vertex_binding_divisors;

src/video_core/renderer_vulkan/vk_pipeline_cache.cpp

@@ -116,12 +116,12 @@ u32 FillDescriptorLayout(const ShaderEntries& entries,
 } // Anonymous namespace
 
 std::size_t GraphicsPipelineCacheKey::Hash() const noexcept {
-    const u64 hash = Common::CityHash64(reinterpret_cast<const char*>(this), sizeof *this);
+    const u64 hash = Common::CityHash64(reinterpret_cast<const char*>(this), Size());
     return static_cast<std::size_t>(hash);
 }
 
 bool GraphicsPipelineCacheKey::operator==(const GraphicsPipelineCacheKey& rhs) const noexcept {
-    return std::memcmp(&rhs, this, sizeof *this) == 0;
+    return std::memcmp(&rhs, this, Size()) == 0;
 }
 
 std::size_t ComputePipelineCacheKey::Hash() const noexcept {
@@ -312,7 +312,8 @@ VKPipelineCache::DecompileShaders(const GraphicsPipelineCacheKey& key) {
     const auto& gpu = system.GPU().Maxwell3D();
 
     Specialization specialization;
-    if (fixed_state.dynamic_state.Topology() == Maxwell::PrimitiveTopology::Points) {
+    if (fixed_state.dynamic_state.Topology() == Maxwell::PrimitiveTopology::Points ||
+        device.IsExtExtendedDynamicStateSupported()) {
         float point_size;
         std::memcpy(&point_size, &fixed_state.point_size, sizeof(float));
         specialization.point_size = point_size;

src/video_core/renderer_vulkan/vk_pipeline_cache.h

@@ -56,6 +56,10 @@ struct GraphicsPipelineCacheKey {
     bool operator!=(const GraphicsPipelineCacheKey& rhs) const noexcept {
         return !operator==(rhs);
     }
+
+    std::size_t Size() const noexcept {
+        return sizeof(renderpass_params) + sizeof(padding) + sizeof(shaders) + fixed_state.Size();
+    }
 };
 static_assert(std::has_unique_object_representations_v<GraphicsPipelineCacheKey>);
 static_assert(std::is_trivially_copyable_v<GraphicsPipelineCacheKey>);

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -413,7 +413,7 @@ void RasterizerVulkan::Draw(bool is_indexed, bool is_instanced) {
 
     const auto& gpu = system.GPU().Maxwell3D();
     GraphicsPipelineCacheKey key;
-    key.fixed_state.Fill(gpu.regs);
+    key.fixed_state.Fill(gpu.regs, device.IsExtExtendedDynamicStateSupported());
 
     buffer_cache.Map(CalculateGraphicsStreamBufferSize(is_indexed));