[Interpreter] Add CallRuntime support to the interpreter.

src/mips/code-stubs-mips.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_MIPS
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 1048 matching lines @@
 }
 
 
 void CEntryStub::Generate(MacroAssembler* masm) {
   // Called from JavaScript; parameters are on stack as if calling JS function
   // a0: number of arguments including receiver
   // a1: pointer to builtin function
   // 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()) {
+    // Move argv into the correct register.
+    __ mov(s1, a2);
+  } else {
+    // Compute the argv pointer in a callee-saved register.
+    __ sll(s1, a0, kPointerSizeLog2);
+    __ Addu(s1, sp, s1);
+    __ Subu(s1, s1, kPointerSize);
+  }
 
   // Enter the exit frame that transitions from JavaScript to C++.
   FrameScope scope(masm, StackFrame::MANUAL);
   __ EnterExitFrame(save_doubles());
 
   // s0: number of arguments  including receiver (C callee-saved)
   // s1: pointer to first argument (C callee-saved)
   // s2: pointer to builtin function (C callee-saved)
 
   // Prepare arguments for C routine.
@@ skipping 60 matching lines @@
     // Cannot use check here as it attempts to generate call into runtime.
     __ Branch(&okay, eq, t0, Operand(a2));
     __ stop("Unexpected pending exception");
     __ bind(&okay);
   }
 
   // Exit C frame and return.
   // v0:v1: result
   // sp: stack pointer
   // fp: frame pointer
-  // s0: still holds argc (callee-saved).
-  __ LeaveExitFrame(save_doubles(), s0, true, EMIT_RETURN);
+  Register argc;
+  if (argv_in_register()) {
+    // We don't want to pop arguments so set argc to no_reg.
+    argc = no_reg;
+  } else {
+    // s0: still holds argc (callee-saved).
+    argc = s0;
+  }
+  __ LeaveExitFrame(save_doubles(), argc, true, EMIT_RETURN);
 
   // Handling of exception.
   __ bind(&exception_returned);
 
   ExternalReference pending_handler_context_address(
       Isolate::kPendingHandlerContextAddress, isolate());
   ExternalReference pending_handler_code_address(
       Isolate::kPendingHandlerCodeAddress, isolate());
   ExternalReference pending_handler_offset_address(
       Isolate::kPendingHandlerOffsetAddress, isolate());
@@ skipping 4559 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS