Revert of [turbofan] Implement rounding of floats on x64 and ia32 without sse4.1.

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 89e622d8b5702a3bc9cd79c289c5633f731fa7a4..f8a49c4968f97975ba1cc0b38bae2db3ffb69b10 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -1226,44 +1226,32 @@
 
 
 void InstructionSelector::VisitFloat32RoundDown(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat32Round | MiscField::encode(kRoundDown),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat32Round | MiscField::encode(kRoundDown));
 }
 
 
 void InstructionSelector::VisitFloat64RoundDown(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat64Round | MiscField::encode(kRoundDown),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat64Round | MiscField::encode(kRoundDown));
 }
 
 
 void InstructionSelector::VisitFloat32RoundUp(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat32Round | MiscField::encode(kRoundUp),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat32Round | MiscField::encode(kRoundUp));
 }
 
 
 void InstructionSelector::VisitFloat64RoundUp(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat64Round | MiscField::encode(kRoundUp),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat64Round | MiscField::encode(kRoundUp));
 }
 
 
 void InstructionSelector::VisitFloat32RoundTruncate(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat32Round | MiscField::encode(kRoundToZero),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat32Round | MiscField::encode(kRoundToZero));
 }
 
 
 void InstructionSelector::VisitFloat64RoundTruncate(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat64Round | MiscField::encode(kRoundToZero),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat64Round | MiscField::encode(kRoundToZero));
 }
 
 
@@ -1273,16 +1261,12 @@
 
 
 void InstructionSelector::VisitFloat32RoundTiesEven(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat32Round | MiscField::encode(kRoundToNearest),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat32Round | MiscField::encode(kRoundToNearest));
 }
 
 
 void InstructionSelector::VisitFloat64RoundTiesEven(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kSSEFloat64Round | MiscField::encode(kRoundToNearest),
-       g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)));
+  VisitRR(this, node, kSSEFloat64Round | MiscField::encode(kRoundToNearest));
 }
 
 
@@ -1815,19 +1799,21 @@
       MachineOperatorBuilder::kFloat64Max |
       MachineOperatorBuilder::kFloat64Min |
       MachineOperatorBuilder::kWord32ShiftIsSafe |
-      MachineOperatorBuilder::kWord32Ctz | MachineOperatorBuilder::kWord64Ctz |
-      MachineOperatorBuilder::kFloat32RoundDown |
-      MachineOperatorBuilder::kFloat32RoundUp |
-      MachineOperatorBuilder::kFloat32RoundTruncate |
-      MachineOperatorBuilder::kFloat32RoundTiesEven |
-      MachineOperatorBuilder::kFloat64RoundDown |
-      MachineOperatorBuilder::kFloat64RoundUp |
-      MachineOperatorBuilder::kFloat64RoundTruncate |
-      MachineOperatorBuilder::kFloat64RoundTiesEven;
+      MachineOperatorBuilder::kWord32Ctz | MachineOperatorBuilder::kWord64Ctz;
   if (CpuFeatures::IsSupported(POPCNT)) {
     flags |= MachineOperatorBuilder::kWord32Popcnt |
              MachineOperatorBuilder::kWord64Popcnt;
   }
+  if (CpuFeatures::IsSupported(SSE4_1)) {
+    flags |= MachineOperatorBuilder::kFloat32RoundDown |
+             MachineOperatorBuilder::kFloat64RoundDown |
+             MachineOperatorBuilder::kFloat32RoundUp |
+             MachineOperatorBuilder::kFloat64RoundUp |
+             MachineOperatorBuilder::kFloat32RoundTruncate |
+             MachineOperatorBuilder::kFloat64RoundTruncate |
+             MachineOperatorBuilder::kFloat32RoundTiesEven |
+             MachineOperatorBuilder::kFloat64RoundTiesEven;
+  }
   return flags;
 }