Uses slt and sltu for signed vs. unsigned comparison by the MIPS assembler.

runtime/vm/assembler_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"
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/runtime_entry.h"
 #include "vm/simulator.h"
@@ skipping 369 matching lines @@
   const intptr_t offset = CodeSize();
 
   addiu(SP, SP, Immediate(-4 * kWordSize));
   sw(RA, Address(SP, 2 * kWordSize));
   sw(FP, Address(SP, 1 * kWordSize));
   sw(PP, Address(SP, 0 * kWordSize));
 
   Label next;
   // Branch and link to the instruction after the delay slot to get the PC.
   bal(&next);
-
   // RA is the address of the sw instruction below. Save it in T0.
   delay_slot()->mov(T0, RA);
 
   // Calculate the offset of the pool pointer from the PC.
   const intptr_t object_pool_pc_dist =
       Instructions::HeaderSize() - Instructions::object_pool_offset() +
       CodeSize();
 
   // This sw instruction is the return address for the bal, so T0 holds
   // the PC at this sw instruction.
@@ skipping 157 matching lines @@
     Emit(reinterpret_cast<int32_t>(message));
     Bind(&msg);
     break_(Instr::kMsgMessageCode);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS