1 files changed, 19 insertions, 2 deletions
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index 75822e750..68efe74b8 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -299,7 +299,7 @@ public:
      * are stored as floats, so this may require conversion.
      * @param reg The destination register to use.
      * @param elem The element to use for the operation.
-     * @param attribute The input attibute to use as the source value.
+     * @param attribute The input attribute to use as the source value.
      */
     void SetRegisterToInputAttibute(const Register& reg, u64 elem, Attribute::Index attribute) {
         std::string dest = GetRegisterAsFloat(reg);
@@ -451,6 +451,12 @@ private:
         switch (attribute) {
         case Attribute::Index::Position:
             return "position";
+        case Attribute::Index::TessCoordInstanceIDVertexID:
+            // TODO(Subv): Find out what the values are for the first two elements when inside a
+            // vertex shader, and what's the value of the fourth element when inside a Tess Eval
+            // shader.
+            ASSERT(stage == Maxwell3D::Regs::ShaderStage::Vertex);
+            return "vec4(0, 0, gl_InstanceID, gl_VertexID)";
         default:
             const u32 index{static_cast<u32>(attribute) -
                             static_cast<u32>(Attribute::Index::Attribute_0)};
@@ -834,13 +840,14 @@ private:
         }
         case OpCode::Type::Conversion: {
             ASSERT_MSG(instr.conversion.size == Register::Size::Word, "Unimplemented");
-            ASSERT_MSG(!instr.conversion.selector, "Unimplemented");
             ASSERT_MSG(!instr.conversion.negate_a, "Unimplemented");
             ASSERT_MSG(!instr.conversion.saturate_a, "Unimplemented");
 
             switch (opcode->GetId()) {
             case OpCode::Id::I2I_R:
             case OpCode::Id::I2F_R: {
+                ASSERT_MSG(!instr.conversion.selector, "Unimplemented");
+
                 std::string op_a =
                     regs.GetRegisterAsInteger(instr.gpr20, 0, instr.conversion.is_signed);
 
@@ -851,6 +858,16 @@ private:
                 regs.SetRegisterToInteger(instr.gpr0, instr.conversion.is_signed, 0, op_a, 1, 1);
                 break;
             }
+            case OpCode::Id::F2F_R: {
+                std::string op_a = regs.GetRegisterAsFloat(instr.gpr20);
+
+                if (instr.conversion.abs_a) {
+                    op_a = "abs(" + op_a + ')';
+                }
+
+                regs.SetRegisterToFloat(instr.gpr0, 0, op_a, 1, 1);
+                break;
+            }
             default: {
                 NGLOG_CRITICAL(HW_GPU, "Unhandled conversion instruction: {}", opcode->GetName());
                 UNREACHABLE();