Updates and fixes for MIPS support.

src/mips/builtins-mips.cc

Index: src/mips/builtins-mips.cc
===================================================================
--- src/mips/builtins-mips.cc	(revision 4259)
+++ src/mips/builtins-mips.cc	(working copy)
@@ -112,7 +112,7 @@
   // s0: argv, ie points to first arg
   Label loop, entry;
   __ sll(t0, a3, kPointerSizeLog2);
-  __ add(t2, s0, t0);
+  __ addu(t2, s0, t0);
   __ b(&entry);
   __ nop();   // Branch delay slot nop.
   // t2 points past last arg.
@@ -122,7 +122,7 @@
   __ lw(t0, MemOperand(t0));  // Dereference handle.
   __ Push(t0);  // Push parameter.
   __ bind(&entry);
-  __ Branch(ne, &loop, s0, Operand(t2));
+  __ Branch(&loop, ne, s0, Operand(t2));
 
   // Registers:
   // a0: entry_address
@@ -145,12 +145,12 @@
 
   // Initialize all JavaScript callee-saved registers, since they will be seen
   // by the garbage collector as part of handlers.
-  __ LoadRoot(t4, Heap::kUndefinedValueRootIndex);
-  __ mov(s1, t4);
-  __ mov(s2, t4);
-  __ mov(s3, t4);
-  __ mov(s4, s4);
-  __ mov(s5, t4);
+  __ LoadRoot(t0, Heap::kUndefinedValueRootIndex);
+  __ mov(s1, t0);
+  __ mov(s2, t0);
+  __ mov(s3, t0);
+  __ mov(s4, t0);
+  __ mov(s5, t0);
   // s6 holds the root address. Do not clobber.
   // s7 is cp. Do not init.
 
@@ -158,7 +158,7 @@
   __ mov(a0, a3);
   if (is_construct) {
     UNIMPLEMENTED_MIPS();
-    __ break_(0x164);
+    __ break_(__LINE__);
   } else {
     ParameterCount actual(a0);
     __ InvokeFunction(a1, actual, CALL_FUNCTION);
@@ -192,7 +192,7 @@
 
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   UNIMPLEMENTED_MIPS();
-  __ break_(0x201);
+  __ break_(__LINE__);
 }