[builtins] Construct builtin frame in String/Number ctors

src/x64/macro-assembler-x64.cc

 // Copyright 2012 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_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 4418 matching lines @@
   if (emit_debug_code()) {
     Move(kScratchRegister, Smi::FromInt(type));
     cmpp(Operand(rbp, CommonFrameConstants::kContextOrFrameTypeOffset),
          kScratchRegister);
     Check(equal, kStackFrameTypesMustMatch);
   }
   movp(rsp, rbp);
   popq(rbp);
 }
 
+void MacroAssembler::EnterBuiltinFrame(Register context, Register target,
+                                       Register argc) {
+  Push(rbp);
+  Move(rbp, rsp);
+  Push(context);
+  Push(target);
+  Push(argc);
+}
+
+void MacroAssembler::LeaveBuiltinFrame(Register context, Register target,
+                                       Register argc) {
+  Pop(argc);
+  Pop(target);
+  Pop(context);
+  leave();
+}
+
 void MacroAssembler::EnterExitFramePrologue(bool save_rax,
                                             StackFrame::Type frame_type) {
   DCHECK(frame_type == StackFrame::EXIT ||
          frame_type == StackFrame::BUILTIN_EXIT);
 
   // Set up the frame structure on the stack.
   // All constants are relative to the frame pointer of the exit frame.
   DCHECK_EQ(kFPOnStackSize + kPCOnStackSize,
             ExitFrameConstants::kCallerSPDisplacement);
   DCHECK_EQ(kFPOnStackSize, ExitFrameConstants::kCallerPCOffset);
@@ skipping 1267 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64