From b541f5e5e333a8ec8c3569e02d67e59ad14217c2 Mon Sep 17 00:00:00 2001
From: FernandoS27 <fsahmkow27@gmail.com>
Date: Mon, 19 Apr 2021 01:03:38 +0200
Subject: shader: Implement VertexA stage

---
 src/video_core/renderer_vulkan/vk_pipeline_cache.cpp | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'src/video_core/renderer_vulkan/vk_pipeline_cache.cpp')

diff --git a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
index 0822862fe..638475251 100644
--- a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
@@ -47,6 +47,7 @@ MICROPROFILE_DECLARE(Vulkan_PipelineCache);
 
 namespace {
 using Shader::Backend::SPIRV::EmitSPIRV;
+using Shader::Maxwell::MergeDualVertexPrograms;
 using Shader::Maxwell::TranslateProgram;
 using VideoCommon::ComputeEnvironment;
 using VideoCommon::FileEnvironment;
@@ -287,22 +288,32 @@ std::unique_ptr<GraphicsPipeline> PipelineCache::CreateGraphicsPipeline(
     LOG_INFO(Render_Vulkan, "0x{:016x}", key.Hash());
     size_t env_index{0};
     std::array<Shader::IR::Program, Maxwell::MaxShaderProgram> programs;
+    bool uses_vertex_a{};
+    std::size_t start_value_processing{};
     for (size_t index = 0; index < Maxwell::MaxShaderProgram; ++index) {
         if (key.unique_hashes[index] == 0) {
             continue;
         }
+        uses_vertex_a |= index == 0;
         Shader::Environment& env{*envs[env_index]};
         ++env_index;
 
         const u32 cfg_offset{static_cast<u32>(env.StartAddress() + sizeof(Shader::ProgramHeader))};
-        Shader::Maxwell::Flow::CFG cfg(env, pools.flow_block, cfg_offset);
-        programs[index] = TranslateProgram(pools.inst, pools.block, env, cfg);
+        Shader::Maxwell::Flow::CFG cfg(env, pools.flow_block, cfg_offset, index == 0);
+        if (!uses_vertex_a || index != 1) {
+            programs[index] = TranslateProgram(pools.inst, pools.block, env, cfg);
+            continue;
+        }
+        Shader::IR::Program& program_va{programs[0]};
+        Shader::IR::Program program_vb{TranslateProgram(pools.inst, pools.block, env, cfg)};
+        programs[index] = MergeDualVertexPrograms(program_va, program_vb, env);
+        start_value_processing = 1;
     }
     std::array<const Shader::Info*, Maxwell::MaxShaderStage> infos{};
     std::array<vk::ShaderModule, Maxwell::MaxShaderStage> modules;
 
     u32 binding{0};
-    for (size_t index = 0; index < Maxwell::MaxShaderProgram; ++index) {
+    for (size_t index = start_value_processing; index < Maxwell::MaxShaderProgram; ++index) {
         if (key.unique_hashes[index] == 0) {
             continue;
         }
-- 
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