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

src/compiler/ia32/instruction-selector-ia32.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/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 578 matching lines @@
        temps);
 }
 
 
 void InstructionSelector::VisitFloat64Sqrt(Node* node) {
   IA32OperandGenerator g(this);
   Emit(kSSEFloat64Sqrt, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
 }
 
 
+void InstructionSelector::VisitFloat64Floor(Node* node) {

[dcarney, 2014/10/27 08:15:08]

should dcheck that sse4.1 is supported here instead of catching it way
downstream.

[sigurds, 2014/10/28 12:47:22]

Done.

+  IA32OperandGenerator g(this);
+  Emit(kSSEFloat64Floor, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitFloat64Ceil(Node* node) {
+  IA32OperandGenerator g(this);
+  Emit(kSSEFloat64Ceil, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitFloat64RoundTruncate(Node* node) {
+  IA32OperandGenerator g(this);
+  Emit(kSSEFloat64RoundTruncate, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitFloat64RoundTiesAway(Node* node) {
+  UnsupportedOperator(node);
+}
+
+
 void InstructionSelector::VisitCall(Node* node) {
   IA32OperandGenerator g(this);
   CallDescriptor* descriptor = OpParameter<CallDescriptor*>(node);
 
   FrameStateDescriptor* frame_state_descriptor = NULL;
 
   if (descriptor->NeedsFrameState()) {
     frame_state_descriptor =
         GetFrameStateDescriptor(node->InputAt(descriptor->InputCount()));
   }
@@ skipping 265 matching lines @@
 
 void InstructionSelector::VisitFloat64LessThanOrEqual(Node* node) {
   FlagsContinuation cont(kUnorderedLessThanOrEqual, node);
   VisitFloat64Compare(this, node, &cont);
 }
 
 
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
+  if (CpuFeatures::IsSupported(SSE4_1)) {
+    return MachineOperatorBuilder::Flag::kFloat64Floor |
+           MachineOperatorBuilder::Flag::kFloat64Ceil |
+           MachineOperatorBuilder::Flag::kFloat64RoundTruncate;
+  }
   return MachineOperatorBuilder::Flag::kNoFlags;
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8