MIPS: Minor fixes and additions needed for Turbofan.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index ce52986f9b4378ed87797a1deb4f47cfda2315d6..62d3aa81d497ad4362b83458ddb6a2fdfd8bf10a 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -587,7 +587,10 @@ class MacroAssembler: public Assembler {
   DEFINE_INSTRUCTION(Addu);
   DEFINE_INSTRUCTION(Subu);
   DEFINE_INSTRUCTION(Mul);
+  DEFINE_INSTRUCTION(Div);
+  DEFINE_INSTRUCTION(Divu);
   DEFINE_INSTRUCTION(Mod);
+  DEFINE_INSTRUCTION(Modu);
   DEFINE_INSTRUCTION(Mulh);
   DEFINE_INSTRUCTION2(Mult);
   DEFINE_INSTRUCTION2(Multu);
@@ -1142,12 +1145,20 @@ class MacroAssembler: public Assembler {
                                Register overflow_dst,
                                Register scratch = at);
 
+  void AdduAndCheckForOverflow(Register dst, Register left,
+                               const Operand& right, Register overflow_dst,
+                               Register scratch = at);
+
   void SubuAndCheckForOverflow(Register dst,
                                Register left,
                                Register right,
                                Register overflow_dst,
                                Register scratch = at);
 
+  void SubuAndCheckForOverflow(Register dst, Register left,
+                               const Operand& right, Register overflow_dst,
+                               Register scratch = at);
+
   void BranchOnOverflow(Label* label,
                         Register overflow_check,
                         BranchDelaySlot bd = PROTECT) {
@@ -1172,13 +1183,10 @@ class MacroAssembler: public Assembler {
   // Runtime calls.
 
   // See comments at the beginning of CEntryStub::Generate.
-  inline void PrepareCEntryArgs(int num_args) {
-    li(s0, num_args);
-    li(s1, (num_args - 1) * kPointerSize);
-  }
+  inline void PrepareCEntryArgs(int num_args) { li(a0, num_args); }
 
   inline void PrepareCEntryFunction(const ExternalReference& ref) {
-    li(s2, Operand(ref));
+    li(a1, Operand(ref));
   }
 
 #define COND_ARGS Condition cond = al, Register rs = zero_reg, \