Add floor, ceil, round (truncate) instructions for ia32, x64 (if SSE4.1) and

src/compiler/js-builtin-reducer.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/js-builtin-reducer.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/types.h"
 
@@ skipping 173 matching lines @@
   if (r.InputsMatchOne(Type::Number())) {
     // Math.fround(a:number) -> TruncateFloat64ToFloat32(a)
     Node* value =
         graph()->NewNode(machine()->TruncateFloat64ToFloat32(), r.left());
     return Replace(value);
   }
   return NoChange();
 }
 
 
+// ES6 draft 10-14-14, section 20.2.2.16.
+Reduction JSBuiltinReducer::ReduceMathFloor(Node* node) {
+  if (!machine()->HasFloat64Floor()) return NoChange();
+  JSCallReduction r(node);
+  if (r.InputsMatchOne(Type::Number())) {
+    // Math.floor(a:number) -> Float64Floor(a)
+    Node* value = graph()->NewNode(machine()->Float64Floor(), r.left());
+    return Replace(value);
+  }
+  return NoChange();
+}
+
+
+// ES6 draft 10-14-14, section 20.2.2.10.
+Reduction JSBuiltinReducer::ReduceMathCeil(Node* node) {
+  if (!machine()->HasFloat64Ceil()) return NoChange();
+  JSCallReduction r(node);
+  if (r.InputsMatchOne(Type::Number())) {
+    // Math.ceil(a:number) -> Float64Ceil(a)
+    Node* value = graph()->NewNode(machine()->Float64Ceil(), r.left());
+    return Replace(value);
+  }
+  return NoChange();
+}
+
+
 Reduction JSBuiltinReducer::Reduce(Node* node) {
   JSCallReduction r(node);
-
   // Dispatch according to the BuiltinFunctionId if present.
   if (!r.HasBuiltinFunctionId()) return NoChange();
   switch (r.GetBuiltinFunctionId()) {
     case kMathAbs:
       return ReplaceWithPureReduction(node, ReduceMathAbs(node));
     case kMathSqrt:
       return ReplaceWithPureReduction(node, ReduceMathSqrt(node));
     case kMathMax:
       return ReplaceWithPureReduction(node, ReduceMathMax(node));
     case kMathImul:
       return ReplaceWithPureReduction(node, ReduceMathImul(node));
     case kMathFround:
       return ReplaceWithPureReduction(node, ReduceMathFround(node));
+    case kMathFloor:
+      return ReplaceWithPureReduction(node, ReduceMathFloor(node));
+    case kMathCeil:
+      return ReplaceWithPureReduction(node, ReduceMathCeil(node));
     default:
       break;
   }
   return NoChange();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8