Reland "ARM64: Add NEON support"

src/compiler/arm64/instruction-selector-arm64.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/assembler-inl.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
 namespace v8 {
@@ skipping 85 matching lines @@
         // TODO(dcarney): some unencodable values can be handled by
         // switching instructions.
         return Assembler::IsImmLogical(static_cast<uint64_t>(value), 32,
                                        &ignored, &ignored, &ignored);
       case kLogical64Imm:
         return Assembler::IsImmLogical(static_cast<uint64_t>(value), 64,
                                        &ignored, &ignored, &ignored);
       case kArithmeticImm:
         return Assembler::IsImmAddSub(value);
       case kLoadStoreImm8:
-        return IsLoadStoreImmediate(value, LSByte);
+        return IsLoadStoreImmediate(value, 0);
       case kLoadStoreImm16:
-        return IsLoadStoreImmediate(value, LSHalfword);
+        return IsLoadStoreImmediate(value, 1);
       case kLoadStoreImm32:
-        return IsLoadStoreImmediate(value, LSWord);
+        return IsLoadStoreImmediate(value, 2);
       case kLoadStoreImm64:
-        return IsLoadStoreImmediate(value, LSDoubleWord);
+        return IsLoadStoreImmediate(value, 3);
       case kNoImmediate:
         return false;
       case kShift32Imm:  // Fall through.
       case kShift64Imm:
         // Shift operations only observe the bottom 5 or 6 bits of the value.
         // All possible shifts can be encoded by discarding bits which have no
         // effect.
         return true;
     }
     return false;
   }
 
   bool CanBeLoadStoreShiftImmediate(Node* node, MachineRepresentation rep) {
     // TODO(arm64): Load and Store on 128 bit Q registers is not supported yet.
     DCHECK_GT(MachineRepresentation::kSimd128, rep);
     return IsIntegerConstant(node) &&
            (GetIntegerConstantValue(node) == ElementSizeLog2Of(rep));
   }
 
  private:
-  bool IsLoadStoreImmediate(int64_t value, LSDataSize size) {
+  bool IsLoadStoreImmediate(int64_t value, unsigned size) {
     return Assembler::IsImmLSScaled(value, size) ||
            Assembler::IsImmLSUnscaled(value);
   }
 };
 
 
 namespace {
 
 void VisitRR(InstructionSelector* selector, ArchOpcode opcode, Node* node) {
   Arm64OperandGenerator g(selector);
@@ skipping 2721 matching lines @@
 // static
 MachineOperatorBuilder::AlignmentRequirements
 InstructionSelector::AlignmentRequirements() {
   return MachineOperatorBuilder::AlignmentRequirements::
       FullUnalignedAccessSupport();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8