X87: [builtins] Construct builtin frame in String/Number ctors.

  port d49d3864 (r37598)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/2132303002
Cr-Commit-Position: refs/heads/master@{#37622}

src/x87/macro-assembler-x87.cc

@@ -1078,6 +1078,23 @@ void MacroAssembler::LeaveFrame(StackFrame::Type type) {
   leave();
 }
 
+void MacroAssembler::EnterBuiltinFrame(Register context, Register target,
+                                       Register argc) {
+  Push(ebp);
+  Move(ebp, esp);
+  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(StackFrame::Type frame_type) {
   DCHECK(frame_type == StackFrame::EXIT ||
          frame_type == StackFrame::BUILTIN_EXIT);

src/x87/macro-assembler-x87.h

@@ -911,6 +911,9 @@ class MacroAssembler: public Assembler {
   void EnterFrame(StackFrame::Type type, bool load_constant_pool_pointer_reg);
   void LeaveFrame(StackFrame::Type type);
 
+  void EnterBuiltinFrame(Register context, Register target, Register argc);
+  void LeaveBuiltinFrame(Register context, Register target, Register argc);
+
   // Expects object in eax and returns map with validated enum cache
   // in eax.  Assumes that any other register can be used as a scratch.
   void CheckEnumCache(Label* call_runtime);