MIPS64: Prepare additonal code for turbofan landing.

src/mips64/builtins-mips64.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.
 
 
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS64
 
@@ skipping 26 matching lines @@
 
   // Insert extra arguments.
   int num_extra_args = 0;
   if (extra_args == NEEDS_CALLED_FUNCTION) {
     num_extra_args = 1;
     __ push(a1);
   } else {
     DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
   }
 
-  // JumpToExternalReference expects s0 to contain the number of arguments
+  // JumpToExternalReference expects a0 to contain the number of arguments
   // including the receiver and the extra arguments.
-  __ Daddu(s0, a0, num_extra_args + 1);
-  __ dsll(s1, s0, kPointerSizeLog2);
-  __ Dsubu(s1, s1, kPointerSize);
+  __ Daddu(a0, a0, num_extra_args + 1);
   __ JumpToExternalReference(ExternalReference(id, masm->isolate()));
 }
 
 
 // Load the built-in InternalArray function from the current context.
 static void GenerateLoadInternalArrayFunction(MacroAssembler* masm,
                                               Register result) {
   // Load the native context.
 
   __ ld(result,
@@ skipping 1520 matching lines @@
     __ break_(0xCC);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS64