[ARM64] [turbofan] Improve construction of doubles.

src/compiler/arm64/code-generator-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/compiler/code-generator.h"
 
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 570 matching lines @@
       __ Sxtw(i.OutputRegister(), i.InputRegister32(0));
       break;
     case kArm64Ubfx:
       __ Ubfx(i.OutputRegister(), i.InputRegister(0), i.InputInt8(1),
               i.InputInt8(2));
       break;
     case kArm64Ubfx32:
       __ Ubfx(i.OutputRegister32(), i.InputRegister32(0), i.InputInt8(1),
               i.InputInt8(2));
       break;
+    case kArm64Bfi:
+      __ Bfi(i.OutputRegister(), i.InputRegister(1), i.InputInt6(2),
+             i.InputInt6(3));
+      break;
     case kArm64TestAndBranch32:
     case kArm64TestAndBranch:
       // Pseudo instructions turned into tbz/tbnz in AssembleArchBranch.
       break;
     case kArm64CompareAndBranch32:
       // Pseudo instruction turned into cbz/cbnz in AssembleArchBranch.
       break;
     case kArm64Claim: {
       int words = MiscField::decode(instr->opcode());
       __ Claim(words);
@@ skipping 89 matching lines @@
     case kArm64Int32ToFloat64:
       __ Scvtf(i.OutputDoubleRegister(), i.InputRegister32(0));
       break;
     case kArm64Uint32ToFloat64:
       __ Ucvtf(i.OutputDoubleRegister(), i.InputRegister32(0));
       break;
     case kArm64Float64ExtractLowWord32:
       __ Fmov(i.OutputRegister32(), i.InputFloat32Register(0));
       break;
     case kArm64Float64ExtractHighWord32:
+      // TODO(arm64): This should use MOV (to general) when NEON is supported.
       __ Fmov(i.OutputRegister(), i.InputFloat64Register(0));
       __ Lsr(i.OutputRegister(), i.OutputRegister(), 32);
       break;
     case kArm64Float64InsertLowWord32: {
+      // TODO(arm64): This should use MOV (from general) when NEON is supported.
       UseScratchRegisterScope scope(masm());
       Register tmp = scope.AcquireX();
       __ Fmov(tmp, i.InputFloat64Register(0));
       __ Bfi(tmp, i.InputRegister(1), 0, 32);
       __ Fmov(i.OutputFloat64Register(), tmp);
       break;
     }
     case kArm64Float64InsertHighWord32: {
+      // TODO(arm64): This should use MOV (from general) when NEON is supported.
       UseScratchRegisterScope scope(masm());
       Register tmp = scope.AcquireX();
       __ Fmov(tmp.W(), i.InputFloat32Register(0));
       __ Bfi(tmp, i.InputRegister(1), 32, 32);
       __ Fmov(i.OutputFloat64Register(), tmp);
       break;
     }
+    case kArm64Float64MoveU64: {
+      __ Fmov(i.OutputFloat64Register(), i.InputRegister(0));
+      break;
+    }
     case kArm64Ldrb:
       __ Ldrb(i.OutputRegister(), i.MemoryOperand());
       break;
     case kArm64Ldrsb:
       __ Ldrsb(i.OutputRegister(), i.MemoryOperand());
       break;
     case kArm64Strb:
       __ Strb(i.InputRegister(2), i.MemoryOperand());
       break;
     case kArm64Ldrh:
@@ skipping 456 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8