[Interpreter] Add CallRuntime support to the interpreter.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index b12cb718ab965321f8fef7fe4a5302e7467c91f1..86f769d458e411bed32b42dd4eb0ec0935d096f5 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -1066,13 +1066,20 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   // fp: frame pointer    (restored after C call)
   // sp: stack pointer    (restored as callee's sp after C call)
   // cp: current context  (C callee-saved)
+  //
+  // If argv_in_register():
+  // a2: pointer to the first argument
 
   ProfileEntryHookStub::MaybeCallEntryHook(masm);
 
-  // Compute the argv pointer in a callee-saved register.
-  __ sll(s1, a0, kPointerSizeLog2);
-  __ Addu(s1, sp, s1);
-  __ Subu(s1, s1, kPointerSize);
+  if (!argv_in_register()) {
+    // Compute the argv pointer in a callee-saved register.
+    __ sll(s1, a0, kPointerSizeLog2);
+    __ Addu(s1, sp, s1);
+    __ Subu(s1, s1, kPointerSize);
+  } else {
+    __ mov(s1, a2);
+  }
 
   // Enter the exit frame that transitions from JavaScript to C++.
   FrameScope scope(masm, StackFrame::MANUAL);