MIPS: Fixed two bugs related to double function calls.

src/mips/code-stubs-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3421 matching lines @@
     // an untagged smi. Allocate a heap number and call a
     // C function for integer exponents. The register containing
     // the heap number is callee-saved.
     __ AllocateHeapNumber(heapnumber,
                           scratch,
                           scratch2,
                           heapnumbermap,
                           &call_runtime);
     __ push(ra);
     __ PrepareCallCFunction(3, scratch);
-    __ SetCallCDoubleArguments(double_base, double_exponent);
+    __ SetCallCDoubleArguments(double_base, exponent);
     __ CallCFunction(
-        ExternalReference::power_double_int_function(masm->isolate()), 4);
+        ExternalReference::power_double_int_function(masm->isolate()), 3);
     __ pop(ra);
     __ GetCFunctionDoubleResult(double_result);
     __ sdc1(double_result,
             FieldMemOperand(heapnumber, HeapNumber::kValueOffset));
     __ mov(v0, heapnumber);
     __ DropAndRet(2 * kPointerSize);
 
     __ bind(&exponent_not_smi);
     __ lw(scratch, FieldMemOperand(exponent, JSObject::kMapOffset));
     __ Branch(&call_runtime, ne, scratch, Operand(heapnumbermap));
@@ skipping 3192 matching lines @@
   __ mov(result, zero_reg);
   __ Ret();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS