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

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index 78713a0f963ed6ed8c49b507945ee1d946801c19..52919918e85c3358fb0264a423424114bf8eab2e 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -723,6 +723,32 @@ void InstructionSelector::VisitFloat64Sqrt(Node* node) {
 }
 
 
+void InstructionSelector::VisitFloat64Floor(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kSSEFloat64Floor, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitFloat64Ceil(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kSSEFloat64Ceil, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitFloat64RoundTruncate(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kSSEFloat64RoundTruncate, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitFloat64RoundTiesAway(Node* node) {
+  UnsupportedOperator(node);
+}
+
+
 void InstructionSelector::VisitCall(Node* node) {
   X64OperandGenerator g(this);
   CallDescriptor* descriptor = OpParameter<CallDescriptor*>(node);
@@ -1112,6 +1138,11 @@ void InstructionSelector::VisitFloat64LessThanOrEqual(Node* node) {
 // 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