[stubs] ToNumberStub --> ToNumber builtin.

src/arm64/builtins-arm64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 152 matching lines @@
   __ Bind(&loop);
   {
     // Check if all parameters done.
     __ Subs(x0, x0, 1);
     __ B(lt, &done_loop);
 
     // Load the next parameter tagged value into x2.
     __ Peek(x2, Operand(x0, LSL, kPointerSizeLog2));
 
     // Load the double value of the parameter into d2, maybe converting the
-    // parameter to a number first using the ToNumberStub if necessary.
+    // parameter to a number first using the ToNumber builtin if necessary.
     Label convert_smi, convert_number, done_convert;
     __ JumpIfSmi(x2, &convert_smi);
     __ JumpIfHeapNumber(x2, &convert_number);
     {
-      // Parameter is not a Number, use the ToNumberStub to convert it.
+      // Parameter is not a Number, use the ToNumber builtin to convert it.
       FrameScope scope(masm, StackFrame::INTERNAL);
       __ SmiTag(x0);
       __ SmiTag(x4);
       __ Push(x0, x1, x4);
       __ Mov(x0, x2);
-      ToNumberStub stub(masm->isolate());
-      __ CallStub(&stub);
+      __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
       __ Mov(x2, x0);
       __ Pop(x4, x1, x0);
       {
         // Restore the double accumulator value (d1).
         Label done_restore;
         __ SmiUntagToDouble(d1, x1, kSpeculativeUntag);
         __ JumpIfSmi(x1, &done_restore);
         __ Ldr(d1, FieldMemOperand(x1, HeapNumber::kValueOffset));
         __ Bind(&done_restore);
       }
@@ skipping 47 matching lines @@
   // receiver).
   Label no_arguments;
   {
     __ Cbz(x0, &no_arguments);
     __ Sub(x0, x0, 1);
     __ Drop(x0);
     __ Ldr(x0, MemOperand(jssp, 2 * kPointerSize, PostIndex));
   }
 
   // 2a. Convert first argument to number.
-  ToNumberStub stub(masm->isolate());
-  __ TailCallStub(&stub);
+  __ Jump(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
 
   // 2b. No arguments, return +0 (already in x0).
   __ Bind(&no_arguments);
   __ Drop(1);
   __ Ret();
 }
 
 
 // static
 void Builtins::Generate_NumberConstructor_ConstructStub(MacroAssembler* masm) {
@@ skipping 27 matching lines @@
 
   // 3. Make sure x2 is a number.
   {
     Label done_convert;
     __ JumpIfSmi(x2, &done_convert);
     __ JumpIfObjectType(x2, x4, x4, HEAP_NUMBER_TYPE, &done_convert, eq);
     {
       FrameScope scope(masm, StackFrame::INTERNAL);
       __ Push(x1, x3);
       __ Move(x0, x2);
-      ToNumberStub stub(masm->isolate());
-      __ CallStub(&stub);
+      __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
       __ Move(x2, x0);
       __ Pop(x3, x1);
     }
     __ Bind(&done_convert);
   }
 
   // 4. Check if new target and constructor differ.
   Label new_object;
   __ Cmp(x1, x3);
   __ B(ne, &new_object);
@@ skipping 2461 matching lines @@
   //  -- x1 : requested object size (untagged)
   //  -- lr : return address
   // -----------------------------------
   __ SmiTag(x1);
   __ Move(x2, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
   __ Push(x1, x2);
   __ Move(cp, Smi::FromInt(0));
   __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
 }
 
+// static
 void Builtins::Generate_StringToNumber(MacroAssembler* masm) {
   // The StringToNumber stub takes one argument in x0.
   __ AssertString(x0);
 
   // Check if string has a cached array index.
   Label runtime;
   __ Ldr(x2, FieldMemOperand(x0, String::kHashFieldOffset));
   __ Tst(x2, Operand(String::kContainsCachedArrayIndexMask));
   __ B(ne, &runtime);
   __ IndexFromHash(x2, x0);
   __ Ret();
 
   __ Bind(&runtime);
   __ Push(x0);  // Push argument.
   __ TailCallRuntime(Runtime::kStringToNumber);
 }
 
+// static
+void Builtins::Generate_ToNumber(MacroAssembler* masm) {
+  // The ToNumber stub takes one argument in x0.
+  Label not_smi;
+  __ JumpIfNotSmi(x0, &not_smi);
+  __ Ret();
+  __ Bind(&not_smi);
+
+  Label not_heap_number;
+  __ CompareObjectType(x0, x1, x1, HEAP_NUMBER_TYPE);
+  // x0: receiver
+  // x1: receiver instance type
+  __ B(ne, &not_heap_number);
+  __ Ret();
+  __ Bind(&not_heap_number);
+
+  __ Jump(masm->isolate()->builtins()->NonNumberToNumber(),
+          RelocInfo::CODE_TARGET);
+}
+
+// static
+void Builtins::Generate_NonNumberToNumber(MacroAssembler* masm) {
+  // The NonNumberToNumber stub takes one argument in x0.
+  __ AssertNotNumber(x0);
+
+  Label not_string;
+  __ CompareObjectType(x0, x1, x1, FIRST_NONSTRING_TYPE);
+  // x0: receiver
+  // x1: receiver instance type
+  __ B(hs, &not_string);
+  __ Jump(masm->isolate()->builtins()->StringToNumber(),
+          RelocInfo::CODE_TARGET);
+  __ Bind(&not_string);
+
+  Label not_oddball;
+  __ Cmp(x1, ODDBALL_TYPE);
+  __ B(ne, &not_oddball);
+  __ Ldr(x0, FieldMemOperand(x0, Oddball::kToNumberOffset));
+  __ Ret();
+  __ Bind(&not_oddball);
+
+  __ Push(x0);  // Push argument.
+  __ TailCallRuntime(Runtime::kToNumber);
+}
+
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   ASM_LOCATION("Builtins::Generate_ArgumentsAdaptorTrampoline");
   // ----------- S t a t e -------------
   //  -- x0 : actual number of arguments
   //  -- x1 : function (passed through to callee)
   //  -- x2 : expected number of arguments
   //  -- x3 : new target (passed through to callee)
   // -----------------------------------
 
   Register argc_actual = x0;  // Excluding the receiver.
@@ skipping 132 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM