From c9d7abe9c9be3e3654b47623602770c9be9ee88f Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Wed, 25 Apr 2018 23:55:21 -0400
Subject: gl_shader_decompiler: Boilerplate for handling integer instructions.

---
 src/video_core/engines/shader_bytecode.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/video_core/engines')

diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index f4d11fa5d..f3ca30cfa 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -19,7 +19,10 @@ namespace Tegra {
 namespace Shader {
 
 struct Register {
-    // Register 255 is special cased to always be 0
+    /// Number of registers
+    static constexpr size_t NumRegisters = 256;
+
+    /// Register 255 is special cased to always be 0
     static constexpr size_t ZeroIndex = 255;
 
     constexpr Register() = default;
@@ -48,6 +51,11 @@ struct Register {
         return ~value;
     }
 
+    u64 GetSwizzledIndex(u64 elem) const {
+        elem = (value + elem) & 3;
+        return (value & ~3) + elem;
+    }
+
 private:
     u64 value{};
 };
-- 
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