From 86fbba06beceee7e4cc0c75b77eb343cbdd6424b Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Wed, 15 Aug 2018 19:51:07 +0200
Subject: [PATCH] [dxbc] Implement DDiv, DFma and DRcp

---
 src/dxbc/dxbc_compiler.cpp | 35 +++++++++++++++++++++++++++++++++--
 src/dxbc/dxbc_compiler.h   |  5 +++++
 2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/src/dxbc/dxbc_compiler.cpp b/src/dxbc/dxbc_compiler.cpp
index e25f12d29..93af2ad4e 100644
--- a/src/dxbc/dxbc_compiler.cpp
+++ b/src/dxbc/dxbc_compiler.cpp
@@ -1421,6 +1421,7 @@ namespace dxvk {
         break;
         
       case DxbcOpcode::Div:
+      case DxbcOpcode::DDiv:
         dst.id = m_module.opFDiv(typeId,
           src.at(0).id, src.at(1).id);
         break;
@@ -1441,6 +1442,7 @@ namespace dxvk {
         break;
       
       case DxbcOpcode::Mad:
+      case DxbcOpcode::DFma:
         dst.id = m_module.opFFma(typeId,
           src.at(0).id, src.at(1).id, src.at(2).id);
         break;
@@ -1463,13 +1465,20 @@ namespace dxvk {
           src.at(0).id, src.at(1).id);
         break;
       
-      case DxbcOpcode::Rcp: {
+      case DxbcOpcode::Rcp:
         dst.id = m_module.opFDiv(typeId,
           emitBuildConstVecf32(
             1.0f, 1.0f, 1.0f, 1.0f,
             ins.dst[0].mask).id,
           src.at(0).id);
-      } break;
+        break;
+      
+      case DxbcOpcode::DRcp:
+        dst.id = m_module.opFDiv(typeId,
+          emitBuildConstVecf64(1.0, 1.0,
+            ins.dst[0].mask).id,
+          src.at(0).id);
+        break;
       
       case DxbcOpcode::RoundNe:
         dst.id = m_module.opRoundEven(
@@ -3903,6 +3912,28 @@ namespace dxvk {
   }
   
   
+  DxbcRegisterValue DxbcCompiler::emitBuildConstVecf64(
+          double                  xy,
+          double                  zw,
+    const DxbcRegMask&            writeMask) {
+    std::array<uint32_t, 2> ids = { 0, 0 };
+    uint32_t componentIndex = 0;
+    
+    if (writeMask[0] && writeMask[1]) ids[componentIndex++] = m_module.constf64(xy);
+    if (writeMask[2] && writeMask[3]) ids[componentIndex++] = m_module.constf64(zw);
+    
+    DxbcRegisterValue result;
+    result.type.ctype  = DxbcScalarType::Float64;
+    result.type.ccount = componentIndex;
+    result.id = componentIndex > 1
+      ? m_module.constComposite(
+          getVectorTypeId(result.type),
+          componentIndex, ids.data())
+      : ids[0];
+    return result;
+  }
+  
+  
   DxbcRegisterValue DxbcCompiler::emitRegisterBitcast(
           DxbcRegisterValue       srcValue,
           DxbcScalarType          dstType) {
diff --git a/src/dxbc/dxbc_compiler.h b/src/dxbc/dxbc_compiler.h
index 74d228375..1ef84a08c 100644
--- a/src/dxbc/dxbc_compiler.h
+++ b/src/dxbc/dxbc_compiler.h
@@ -774,6 +774,11 @@ namespace dxvk {
             int32_t                 w,
       const DxbcRegMask&            writeMask);
     
+    DxbcRegisterValue emitBuildConstVecf64(
+            double                  xy,
+            double                  zw,
+      const DxbcRegMask&            writeMask);
+    
     /////////////////////////////////////////
     // Generic register manipulation methods
     DxbcRegisterValue emitRegisterBitcast(