[arm][arm64] Improve CountTrailingZero implementation.

src/compiler/instruction-selector.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.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
@@ skipping 849 matching lines @@
     case IrOpcode::kWord32Sar:
       return MarkAsWord32(node), VisitWord32Sar(node);
     case IrOpcode::kWord32Ror:
       return MarkAsWord32(node), VisitWord32Ror(node);
     case IrOpcode::kWord32Equal:
       return VisitWord32Equal(node);
     case IrOpcode::kWord32Clz:
       return MarkAsWord32(node), VisitWord32Clz(node);
     case IrOpcode::kWord32Ctz:
       return MarkAsWord32(node), VisitWord32Ctz(node);
+    case IrOpcode::kWord32ReverseBits:
+      return MarkAsWord32(node), VisitWord32ReverseBits(node);
     case IrOpcode::kWord32Popcnt:
       return MarkAsWord32(node), VisitWord32Popcnt(node);
     case IrOpcode::kWord64Popcnt:
       return MarkAsWord32(node), VisitWord64Popcnt(node);
     case IrOpcode::kWord64And:
       return MarkAsWord64(node), VisitWord64And(node);
     case IrOpcode::kWord64Or:
       return MarkAsWord64(node), VisitWord64Or(node);
     case IrOpcode::kWord64Xor:
       return MarkAsWord64(node), VisitWord64Xor(node);
     case IrOpcode::kWord64Shl:
       return MarkAsWord64(node), VisitWord64Shl(node);
     case IrOpcode::kWord64Shr:
       return MarkAsWord64(node), VisitWord64Shr(node);
     case IrOpcode::kWord64Sar:
       return MarkAsWord64(node), VisitWord64Sar(node);
     case IrOpcode::kWord64Ror:
       return MarkAsWord64(node), VisitWord64Ror(node);
     case IrOpcode::kWord64Clz:
       return MarkAsWord64(node), VisitWord64Clz(node);
     case IrOpcode::kWord64Ctz:
       return MarkAsWord64(node), VisitWord64Ctz(node);
+    case IrOpcode::kWord64ReverseBits:
+      return MarkAsWord64(node), VisitWord64ReverseBits(node);
     case IrOpcode::kWord64Equal:
       return VisitWord64Equal(node);
     case IrOpcode::kInt32Add:
       return MarkAsWord32(node), VisitInt32Add(node);
     case IrOpcode::kInt32AddWithOverflow:
       return MarkAsWord32(node), VisitInt32AddWithOverflow(node);
     case IrOpcode::kInt32Sub:
       return MarkAsWord32(node), VisitInt32Sub(node);
     case IrOpcode::kInt32SubWithOverflow:
       return VisitInt32SubWithOverflow(node);
@@ skipping 270 matching lines @@
 
 void InstructionSelector::VisitWord64Ror(Node* node) { UNIMPLEMENTED(); }
 
 
 void InstructionSelector::VisitWord64Clz(Node* node) { UNIMPLEMENTED(); }
 
 
 void InstructionSelector::VisitWord64Ctz(Node* node) { UNIMPLEMENTED(); }
 
 
+void InstructionSelector::VisitWord64ReverseBits(Node* node) {
+  UNIMPLEMENTED();
+}
+
+
 void InstructionSelector::VisitWord64Popcnt(Node* node) { UNIMPLEMENTED(); }
 
 
 void InstructionSelector::VisitWord64Equal(Node* node) { UNIMPLEMENTED(); }
 
 
 void InstructionSelector::VisitInt64Add(Node* node) { UNIMPLEMENTED(); }
 
 
 void InstructionSelector::VisitInt64AddWithOverflow(Node* node) {
@@ skipping 448 matching lines @@
   return new (instruction_zone()) FrameStateDescriptor(
       instruction_zone(), state_info.type(), state_info.bailout_id(),
       state_info.state_combine(), parameters, locals, stack,
       state_info.shared_info(), outer_state);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8