Fraction class prototype and test (not to be committed).

runtime/vm/intrinsifier_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 685 matching lines @@
   __ LoadObject(V0, Bool::True());
   __ Ret();
 
   // At least one of the arguments was not Smi.
   Label receiver_not_smi;
   __ Bind(&check_for_mint);
 
   __ andi(CMPRES1, T1, Immediate(kSmiTagMask));
   __ bne(CMPRES1, ZR, &receiver_not_smi);  // Check receiver.
 
-  // Left (receiver) is Smi, return false if right is not Double.
+  // Left (receiver) is Smi, return false if right is not Double or Fraction.
   // Note that an instance of Mint or Bigint never contains a value that can be
   // represented by Smi.
 
   __ LoadClassId(CMPRES1, T0);
   __ BranchEqual(CMPRES1, Immediate(kDoubleCid), &fall_through);
+  __ BranchEqual(CMPRES1, Immediate(kFractionCid), &fall_through);
   __ LoadObject(V0, Bool::False());  // Smi == Mint -> false.
   __ Ret();
 
   __ Bind(&receiver_not_smi);
   // T1:: receiver.
 
   __ LoadClassId(CMPRES1, T1);
   __ BranchNotEqual(CMPRES1, Immediate(kMintCid), &fall_through);
   // Receiver is Mint, return false if right is Smi.
   __ andi(CMPRES1, T0, Immediate(kSmiTagMask));
@@ skipping 1515 matching lines @@
   __ lw(T0, Address(V0, TimelineStream::enabled_offset()));
   __ LoadObject(V0, Bool::True());
   __ LoadObject(V1, Bool::False());
   __ Ret();
   __ delay_slot()->movz(V0, V1, T0);  // V0 = (T0 == 0) ? V1 : V0.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS