shader_unit: Intialize temporaries on shader invocation

src/video_core/pica/pica_core.cpp

@@ -256,10 +256,6 @@ void PicaCore::WriteInternalReg(u32 id, u32 value, u32 mask) {
 
     case PICA_REG_INDEX(vs.bool_uniforms):
         vs_setup.WriteUniformBoolReg(regs.internal.vs.bool_uniforms.Value());
-        if (!regs.internal.pipeline.gs_unit_exclusive_configuration &&
-            regs.internal.pipeline.use_gs == PipelineRegs::UseGS::No) {
-            gs_setup.WriteUniformBoolReg(regs.internal.vs.bool_uniforms.Value());
-        }
         break;
 
     case PICA_REG_INDEX(vs.int_uniforms[0]):
@@ -268,10 +264,6 @@ void PicaCore::WriteInternalReg(u32 id, u32 value, u32 mask) {
     case PICA_REG_INDEX(vs.int_uniforms[3]): {
         const u32 index = (id - PICA_REG_INDEX(vs.int_uniforms[0]));
         vs_setup.WriteUniformIntReg(index, regs.internal.vs.GetIntUniform(index));
-        if (!regs.internal.pipeline.gs_unit_exclusive_configuration &&
-            regs.internal.pipeline.use_gs == PipelineRegs::UseGS::No) {
-            gs_setup.WriteUniformIntReg(index, regs.internal.vs.GetIntUniform(index));
-        }
         break;
     }
 
@@ -283,11 +275,7 @@ void PicaCore::WriteInternalReg(u32 id, u32 value, u32 mask) {
     case PICA_REG_INDEX(vs.uniform_setup.set_value[5]):
     case PICA_REG_INDEX(vs.uniform_setup.set_value[6]):
     case PICA_REG_INDEX(vs.uniform_setup.set_value[7]): {
-        const auto index = vs_setup.WriteUniformFloatReg(regs.internal.vs, value);
-        if (!regs.internal.pipeline.gs_unit_exclusive_configuration &&
-            regs.internal.pipeline.use_gs == PipelineRegs::UseGS::No && index) {
-            gs_setup.uniforms.f[index.value()] = vs_setup.uniforms.f[index.value()];
-        }
+        vs_setup.WriteUniformFloatReg(regs.internal.vs, value);
         break;
     }
 

src/video_core/pica/shader_setup.cpp

@@ -27,23 +27,21 @@ void ShaderSetup::WriteUniformIntReg(u32 index, const Common::Vec4<u8> values) {
     uniforms.i[index] = values;
 }
 
-std::optional<u32> ShaderSetup::WriteUniformFloatReg(ShaderRegs& config, u32 value) {
+void ShaderSetup::WriteUniformFloatReg(ShaderRegs& config, u32 value) {
     auto& uniform_setup = config.uniform_setup;
     const bool is_float32 = uniform_setup.IsFloat32();
     if (!uniform_queue.Push(value, is_float32)) {
-        return std::nullopt;
+        return;
     }
 
     const auto uniform = uniform_queue.Get(is_float32);
     if (uniform_setup.index >= uniforms.f.size()) {
         LOG_ERROR(HW_GPU, "Invalid float uniform index {}", uniform_setup.index.Value());
-        return std::nullopt;
+        return;
     }
 
-    const u32 index = uniform_setup.index.Value();
-    uniforms.f[index] = uniform;
-    uniform_setup.index.Assign(index + 1);
-    return index;
+    uniforms.f[uniform_setup.index] = uniform;
+    uniform_setup.index.Assign(uniform_setup.index + 1);
 }
 
 u64 ShaderSetup::GetProgramCodeHash() {

src/video_core/pica/shader_setup.h

@@ -4,7 +4,6 @@
 
 #pragma once
 
-#include <optional>
 #include "common/vector_math.h"
 #include "video_core/pica/packed_attribute.h"
 #include "video_core/pica_types.h"
@@ -59,7 +58,7 @@ public:
 
     void WriteUniformIntReg(u32 index, const Common::Vec4<u8> values);
 
-    std::optional<u32> WriteUniformFloatReg(ShaderRegs& config, u32 value);
+    void WriteUniformFloatReg(ShaderRegs& config, u32 value);
 
     u64 GetProgramCodeHash();
 

src/video_core/pica/shader_unit.cpp

@@ -9,7 +9,10 @@
 
 namespace Pica {
 
-ShaderUnit::ShaderUnit(GeometryEmitter* emitter) : emitter_ptr{emitter} {}
+ShaderUnit::ShaderUnit(GeometryEmitter* emitter) : emitter_ptr{emitter} {
+    const Common::Vec4<f24> temp_vec{f24::Zero(), f24::Zero(), f24::Zero(), f24::One()};
+    temporary.fill(temp_vec);
+}
 
 ShaderUnit::~ShaderUnit() = default;