From bd38f4d92125e648b276344ebb2ab9d517b3e7a5 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack@tungstengraphics.com>
Date: Wed, 17 Oct 2007 13:46:00 -0400
Subject: Implement dst opcode

---
 src/mesa/pipe/llvm/instructions.cpp | 22 ++++++++++++++++++++++
 src/mesa/pipe/llvm/instructions.h   |  1 +
 src/mesa/pipe/llvm/llvmtgsi.cpp     |  4 +++-
 3 files changed, 26 insertions(+), 1 deletion(-)

(limited to 'src/mesa')

diff --git a/src/mesa/pipe/llvm/instructions.cpp b/src/mesa/pipe/llvm/instructions.cpp
index 62289ba62a..ee67ae0eed 100644
--- a/src/mesa/pipe/llvm/instructions.cpp
+++ b/src/mesa/pipe/llvm/instructions.cpp
@@ -280,3 +280,25 @@ llvm::Value * Instructions::dph(llvm::Value *in1, llvm::Value *in2)
    return vectorFromVals(dph, dph, dph, dph);
 }
 
+llvm::Value * Instructions::dst(llvm::Value *in1, llvm::Value *in2)
+{
+   ExtractElementInst *y1 = new ExtractElementInst(in1, unsigned(1),
+                                                   name("y1"),
+                                                   m_block);
+   ExtractElementInst *z = new ExtractElementInst(in1, unsigned(2),
+                                                  name("z"),
+                                                  m_block);
+   ExtractElementInst *y2 = new ExtractElementInst(in2, unsigned(1),
+                                                   name("y2"),
+                                                   m_block);
+   ExtractElementInst *w = new ExtractElementInst(in2, unsigned(3),
+                                                  name("w"),
+                                                  m_block);
+   BinaryOperator *ry = BinaryOperator::create(Instruction::Mul,
+                                               y1, y2,
+                                               name("tyuy"),
+                                               m_block);
+   return vectorFromVals(ConstantFP::get(Type::FloatTy, APFloat(1.f)),
+                         ry, z, w);
+}
+
diff --git a/src/mesa/pipe/llvm/instructions.h b/src/mesa/pipe/llvm/instructions.h
index fb8ac9b8cd..0ca9bd25a7 100644
--- a/src/mesa/pipe/llvm/instructions.h
+++ b/src/mesa/pipe/llvm/instructions.h
@@ -18,6 +18,7 @@ public:
    llvm::Value *dp3(llvm::Value *in1, llvm::Value *in2);
    llvm::Value *dp4(llvm::Value *in1, llvm::Value *in2);
    llvm::Value *dph(llvm::Value *in1, llvm::Value *in2);
+   llvm::Value *dst(llvm::Value *in1, llvm::Value *in2);
    llvm::Value *lit(llvm::Value *in1);
    llvm::Value *madd(llvm::Value *in1, llvm::Value *in2,
                      llvm::Value *in2);
diff --git a/src/mesa/pipe/llvm/llvmtgsi.cpp b/src/mesa/pipe/llvm/llvmtgsi.cpp
index 9a5d3b8d9c..91c2d9beb8 100644
--- a/src/mesa/pipe/llvm/llvmtgsi.cpp
+++ b/src/mesa/pipe/llvm/llvmtgsi.cpp
@@ -209,7 +209,9 @@ translate_instruction(llvm::Module *module,
       out = instr->dp4(inputs[0], inputs[1]);
    }
       break;
-   case TGSI_OPCODE_DST:
+   case TGSI_OPCODE_DST: {
+      out = instr->dst(inputs[0], inputs[1]);
+   }
       break;
    case TGSI_OPCODE_MIN:
       break;
-- 
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