MIPS: Support for DoubleToIStub (truncating).

src/mips/code-stubs-mips.h

Index: src/mips/code-stubs-mips.h
diff --git a/src/mips/code-stubs-mips.h b/src/mips/code-stubs-mips.h
index 221b344e2c0da9207e3a42f9ca3458a50b4fe0fb..18001780c3f8479c59459c835d54b55b70a84ea1 100644
--- a/src/mips/code-stubs-mips.h
+++ b/src/mips/code-stubs-mips.h
@@ -391,7 +391,7 @@ class RecordWriteStub: public PlatformCodeStub {
           address_(address),
           scratch0_(scratch0) {
       ASSERT(!AreAliased(scratch0, object, address, no_reg));
-      scratch1_ = GetRegThatIsNotOneOf(object_, address_, scratch0_);
+      scratch1_ = GetRegisterThatIsNotOneOf(object_, address_, scratch0_);
     }
 
     void Save(MacroAssembler* masm) {
@@ -434,19 +434,6 @@ class RecordWriteStub: public PlatformCodeStub {
     Register scratch0_;
     Register scratch1_;
 
-    Register GetRegThatIsNotOneOf(Register r1,
-                                  Register r2,
-                                  Register r3) {
-      for (int i = 0; i < Register::NumAllocatableRegisters(); i++) {
-        Register candidate = Register::FromAllocationIndex(i);
-        if (candidate.is(r1)) continue;
-        if (candidate.is(r2)) continue;
-        if (candidate.is(r3)) continue;
-        return candidate;
-      }
-      UNREACHABLE();
-      return no_reg;
-    }
     friend class RecordWriteStub;
   };