Fixes a bug in the mips Random_nextState intrinsic.

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 1441 matching lines @@
   const Address& addr_0 = FieldAddress(T1,
       FlowGraphCompiler::DataOffsetFor(kTypedDataUint32ArrayCid));
 
   const Address& addr_1 = FieldAddress(T1,
       FlowGraphCompiler::ElementSizeFor(kTypedDataUint32ArrayCid) +
       FlowGraphCompiler::DataOffsetFor(kTypedDataUint32ArrayCid));
 
   __ LoadImmediate(T0, a_int32_value);
   __ lw(T2, addr_0);
   __ lw(T3, addr_1);
-  __ sra(T6, T3, 31);  // Sign extend T3 into T6.
   __ mtlo(T3);
-  __ mthi(T6);  // HI:LO <- T6:T3
+  __ mthi(ZR);  // HI:LO <- ZR:T3  Zero extend T3 into HI.
   // 64-bit multiply and accumulate into T6:T3.
-  __ madd(T0, T2);  // HI:LO <- HI:LO + T0 * T2.
+  __ maddu(T0, T2);  // HI:LO <- HI:LO + T0 * T2.
   __ mflo(T3);
   __ mfhi(T6);
   __ sw(T3, addr_0);
   __ sw(T6, addr_1);
   __ Ret();
   return true;
 }
 
 
 bool Intrinsifier::Object_equal(Assembler* assembler) {
@@ skipping 299 matching lines @@
   __ Bind(&ok);
   __ Ret();
 
   __ Bind(&fall_through);
   return false;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS