From 88cb1755e1d6acaed0f66ce65d7a2a4465053342 Mon Sep 17 00:00:00 2001
From: Roland Levillain <rpl@google.com>
Date: Mon, 20 Oct 2014 16:36:47 +0100
Subject: Implement int negate instruction in the optimizing compiler.

- Add support for the neg-int (integer two's complement
  negate) instruction in the optimizing compiler.
- Add a HNeg node type for control-flow graphs and an
  intermediate HUnaryOperation base class.
- Generate ARM, x86 and x86-64 code for integer HNeg nodes.

Change-Id: I72fd3e1e5311a75c38a8cb665a9211a20325a42e
---
 compiler/optimizing/builder.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'compiler/optimizing/builder.cc')

diff --git a/compiler/optimizing/builder.cc b/compiler/optimizing/builder.cc
index 2648d4d670..2f1a092ea8 100644
--- a/compiler/optimizing/builder.cc
+++ b/compiler/optimizing/builder.cc
@@ -266,6 +266,13 @@ HBasicBlock* HGraphBuilder::FindBlockStartingAt(int32_t index) const {
   return branch_targets_.Get(index);
 }
 
+template<typename T>
+void HGraphBuilder::Unop_12x(const Instruction& instruction, Primitive::Type type) {
+  HInstruction* first = LoadLocal(instruction.VRegB(), type);
+  current_block_->AddInstruction(new (arena_) T(type, first));
+  UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction());
+}
+
 template<typename T>
 void HGraphBuilder::Binop_23x(const Instruction& instruction, Primitive::Type type) {
   HInstruction* first = LoadLocal(instruction.VRegB(), type);
@@ -678,6 +685,11 @@ bool HGraphBuilder::AnalyzeDexInstruction(const Instruction& instruction, uint32
       break;
     }
 
+    case Instruction::NEG_INT: {
+      Unop_12x<HNeg>(instruction, Primitive::kPrimInt);
+      break;
+    }
+
     case Instruction::ADD_INT: {
       Binop_23x<HAdd>(instruction, Primitive::kPrimInt);
       break;
-- 
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