From d3878392693481a102d30fa7c8bb0560f8e72d7c Mon Sep 17 00:00:00 2001
From: mailwl <mailwl@gmail.com>
Date: Wed, 17 Jun 2015 19:29:39 +0300
Subject: [PATCH] Implementing DPH/DPHI vertex shader opcodes

---
 src/video_core/vertex_shader.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/video_core/vertex_shader.cpp b/src/video_core/vertex_shader.cpp
index 87006a832..c9a6170c5 100644
--- a/src/video_core/vertex_shader.cpp
+++ b/src/video_core/vertex_shader.cpp
@@ -230,6 +230,21 @@ static void ProcessShaderCode(VertexShaderState& state) {
                 break;
             }
 
+            case OpCode::Id::DPH:
+            case OpCode::Id::DPHI:
+            {
+                float24 dot = src2[3];
+                for (int i = 0; i < 3; ++i)
+                    dot += src1[i] * src2[i];
+
+                for (int i = 0; i < 4; ++i) {
+                    if (!swizzle.DestComponentEnabled(i))
+                        continue;
+                    dest[i] = dot;
+                }
+                break;
+            }
+
             // Reciprocal
             case OpCode::Id::RCP:
             {