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

runtime/vm/stub_code_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/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 268 matching lines @@
   // T2: address of first argument in array.
   Label loop, loop_condition;
   __ b(&loop_condition);
   __ Bind(&loop);
   __ lw(TMP, Address(T1));
   __ sw(TMP, Address(T2));
   __ AddImmediate(T1, -kWordSize);
   __ AddImmediate(T2, kWordSize);
   __ Bind(&loop_condition);
   __ AddImmediate(A1, -Smi::RawValue(1));  // A1 is Smi.
-  __ BranchGreaterEqual(A1, ZR, &loop);
+  __ BranchSignedGreaterEqual(A1, ZR, &loop);
 }
 
 
 // Input parameters:
 //   S5: ic-data.
 //   S4: arguments descriptor array.
 // Note: The receiver object is the first argument to the function being
 //       called, the stub accesses the receiver from this location directly
 //       when trying to resolve the call.
 void StubCode::GenerateInstanceFunctionLookupStub(Assembler* assembler) {
@@ skipping 499 matching lines @@
 
   // Set up arguments for the Dart call.
   Label push_arguments;
   Label done_push_arguments;
   __ beq(T1, ZR, &done_push_arguments);  // check if there are arguments.
   __ mov(A1, ZR);
   __ Bind(&push_arguments);
   __ lw(A3, Address(A2));
   __ Push(A3);
   __ addiu(A1, A1, Immediate(1));
-  __ BranchLess(A1, T1, &push_arguments);
+  __ BranchSignedLess(A1, T1, &push_arguments);
   __ delay_slot()->addiu(A2, A2, Immediate(kWordSize));
 
   __ Bind(&done_push_arguments);
 
   // Call the Dart code entrypoint.
   __ jalr(A0);  // S4 is the arguments descriptor array.
   __ TraceSimMsg("InvokeDartCodeStub return");
 
   // Read the saved new Context pointer.
   __ lw(CTX, Address(FP, kNewContextOffset));
@@ skipping 576 matching lines @@
     __ lw(S4, Address(SP, 2 * kWordSize));  // Restore.
     __ lw(S5, Address(SP, 3 * kWordSize));
     __ lw(T0, Address(SP, 4 * kWordSize));
     __ addiu(SP, SP, Immediate(5 * kWordSize));  // Discard argument;
     __ LeaveStubFrame();
   }
   __ lw(T7, FieldAddress(func_reg, Function::usage_counter_offset()));
   Label is_hot;
   if (FlowGraphCompiler::CanOptimize()) {
     ASSERT(FLAG_optimization_counter_threshold > 1);
-    __ BranchGreaterEqual(T7, FLAG_optimization_counter_threshold, &is_hot);
+    __ BranchSignedGreaterEqual(T7, FLAG_optimization_counter_threshold,
+                                &is_hot);
     // As long as VM has no OSR do not optimize in the middle of the function
     // but only at exit so that we have collected all type feedback before
     // optimizing.
   }
   __ addiu(T7, T7, Immediate(1));
   __ sw(T7, FieldAddress(func_reg, Function::usage_counter_offset()));
   __ Bind(&is_hot);
 }
 
 
@@ skipping 699 matching lines @@
   __ Bind(&done);
   __ lw(T0, Address(SP, 0 * kWordSize));
   __ lw(T1, Address(SP, 1 * kWordSize));
   __ Ret();
   __ delay_slot()->addiu(SP, SP, Immediate(2 * kWordSize));
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS