From cd163fb59ae2922d33aa931f51ef5d116c0adc3f Mon Sep 17 00:00:00 2001
From: Tony Wasserka <NeoBrainX@gmail.com>
Date: Sat, 13 Dec 2014 21:22:55 +0100
Subject: [PATCH] Pica/VertexShader: Implement MAX instructions.

---
 src/video_core/vertex_shader.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/video_core/vertex_shader.cpp b/src/video_core/vertex_shader.cpp
index fbec1bcc80..742e5a9f21 100644
--- a/src/video_core/vertex_shader.cpp
+++ b/src/video_core/vertex_shader.cpp
@@ -197,6 +197,15 @@ static void ProcessShaderCode(VertexShaderState& state) {
                 break;
             }
 
+            case Instruction::OpCode::MAX:
+                for (int i = 0; i < 4; ++i) {
+                    if (!swizzle.DestComponentEnabled(i))
+                        continue;
+
+                    dest[i] = std::max(src1[i], src2[i]);
+                }
+                break;
+
             case Instruction::OpCode::DP3:
             case Instruction::OpCode::DP4:
             {