Shader: Initial implementation of x86_x64 JIT compiler for Pica vertex shaders.

- Config: Add an option for selecting to use shader JIT or interpreter.
- Qt: Add a menu option for enabling/disabling the shader JIT.

src/citra/citra.cpp

@@ -71,6 +71,7 @@ int main(int argc, char **argv) {
     EmuWindow_GLFW* emu_window = new EmuWindow_GLFW;
 
     VideoCore::g_hw_renderer_enabled = Settings::values.use_hw_renderer;
+    VideoCore::g_shader_jit_enabled = Settings::values.use_shader_jit;
 
     System::Init(emu_window);
 

src/citra/config.cpp

@@ -61,6 +61,7 @@ void Config::ReadValues() {
 
     // Renderer
     Settings::values.use_hw_renderer = glfw_config->GetBoolean("Renderer", "use_hw_renderer", false);
+    Settings::values.use_shader_jit = glfw_config->GetBoolean("Renderer", "use_shader_jit", true);
 
     Settings::values.bg_red   = (float)glfw_config->GetReal("Renderer", "bg_red",   1.0);
     Settings::values.bg_green = (float)glfw_config->GetReal("Renderer", "bg_green", 1.0);

src/citra/default_ini.h

@@ -42,6 +42,10 @@ frame_skip =
 # 0 (default): Software, 1: Hardware
 use_hw_renderer =
 
+# Whether to use the Just-In-Time (JIT) compiler for shader emulation
+# 0 : Interpreter (slow), 1 (default): JIT (fast)
+use_shader_jit =
+
 # The clear color for the renderer. What shows up on the sides of the bottom screen.
 # Must be in range of 0.0-1.0. Defaults to 1.0 for all.
 bg_red =