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

src/compiler/ia32/instruction-selector-ia32.cc

Index: src/compiler/ia32/instruction-selector-ia32.cc
diff --git a/src/compiler/ia32/instruction-selector-ia32.cc b/src/compiler/ia32/instruction-selector-ia32.cc
index e1a9cb7f69be8ef97f37abfe70f32a7622211967..5e915a6252701570a732c500c7d002ab6c2b476c 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -142,6 +142,14 @@ class AddressingModeMatcher {
 };
 
 
+static void VisitRRFloat64(InstructionSelector* selector, ArchOpcode opcode,
+                           Node* node) {
+  IA32OperandGenerator g(selector);
+  selector->Emit(opcode, g.DefineAsRegister(node),
+                 g.UseRegister(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitLoad(Node* node) {
   MachineType rep = RepresentationOf(OpParameter<LoadRepresentation>(node));
   MachineType typ = TypeOf(OpParameter<LoadRepresentation>(node));
@@ -596,6 +604,35 @@ void InstructionSelector::VisitFloat64Sqrt(Node* node) {
 }
 
 
+void InstructionSelector::VisitFloat64Floor(Node* node) {
+  if (!CpuFeatures::IsSupported(SSE4_1)) {

[Benedikt Meurer, 2014/10/30 11:59:12]

I think this should be DCHECK(CpuFeatures::IsSupported(ARMv8)) instead.

[sigurds, 2014/10/30 12:18:26]

Done.

+    UNSUPPORTED_OPERATOR(node);
+  }
+  VisitRRFloat64(this, kSSEFloat64Floor, node);
+}
+
+
+void InstructionSelector::VisitFloat64Ceil(Node* node) {
+  if (!CpuFeatures::IsSupported(SSE4_1)) {

[Benedikt Meurer, 2014/10/30 11:59:13]

I think this should be DCHECK(CpuFeatures::IsSupported(ARMv8)) instead.

[sigurds, 2014/10/30 12:18:26]

Done.

+    UNSUPPORTED_OPERATOR(node);
+  }
+  VisitRRFloat64(this, kSSEFloat64Ceil, node);
+}
+
+
+void InstructionSelector::VisitFloat64RoundTruncate(Node* node) {
+  if (!CpuFeatures::IsSupported(SSE4_1)) {

[Benedikt Meurer, 2014/10/30 11:59:12]

I think this should be DCHECK(CpuFeatures::IsSupported(ARMv8)) instead.

[sigurds, 2014/10/30 12:18:26]

Done.

+    UNSUPPORTED_OPERATOR(node);
+  }
+  VisitRRFloat64(this, kSSEFloat64RoundTruncate, node);
+}
+
+
+void InstructionSelector::VisitFloat64RoundTiesAway(Node* node) {
+  UNSUPPORTED_OPERATOR(node);
+}
+
+
 void InstructionSelector::VisitCall(Node* node) {
   IA32OperandGenerator g(this);
   CallDescriptor* descriptor = OpParameter<CallDescriptor*>(node);
@@ -881,9 +918,13 @@ void InstructionSelector::VisitFloat64LessThanOrEqual(Node* node) {
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
-  return MachineOperatorBuilder::kNoFlags;
+  if (CpuFeatures::IsSupported(SSE4_1)) {
+    return MachineOperatorBuilder::kFloat64Floor |
+           MachineOperatorBuilder::kFloat64Ceil |
+           MachineOperatorBuilder::kFloat64RoundTruncate;
+  }
+  return MachineOperatorBuilder::Flag::kNoFlags;
 }
-
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8