[turbofan] Unify Math.floor / Math.ceil optimization.

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 365 matching lines @@
     }
     case kArchRet:
       AssembleReturn();
       break;
     case kArchStackPointer:
       __ mov(i.OutputRegister(), masm()->StackPointer());
       break;
     case kArchTruncateDoubleToI:
       __ TruncateDoubleToI(i.OutputRegister(), i.InputDoubleRegister(0));
       break;
-    case kArm64Float64Ceil:
-      __ Frintp(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+    case kArm64Float64RoundDown:
+      __ Frintm(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
-    case kArm64Float64Floor:
-      __ Frintm(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+    case kArm64Float64RoundTiesAway:
+      __ Frinta(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     case kArm64Float64RoundTruncate:
       __ Frintz(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
-    case kArm64Float64RoundTiesAway:
-      __ Frinta(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+    case kArm64Float64RoundUp:
+      __ Frintp(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     case kArm64Add:
       __ Add(i.OutputRegister(), i.InputRegister(0), i.InputOperand2_64(1));
       break;
     case kArm64Add32:
       if (FlagsModeField::decode(opcode) != kFlags_none) {
         __ Adds(i.OutputRegister32(), i.InputRegister32(0),
                 i.InputOperand2_32(1));
       } else {
         __ Add(i.OutputRegister32(), i.InputRegister32(0),
@@ skipping 778 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8