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

runtime/vm/intermediate_language_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/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 1008 matching lines @@
       break;
     case kTypedDataUint16ArrayCid:
     case kTwoByteStringCid:
       __ lhu(result, element_address);
       __ SmiTag(result);
       break;
     case kTypedDataInt32ArrayCid: {
         Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptInt32Load);
         __ lw(result, element_address);
         // Verify that the signed value in 'result' can fit inside a Smi.
-        __ BranchLess(result, 0xC0000000, deopt);
+        __ BranchSignedLess(result, 0xC0000000, deopt);
         __ SmiTag(result);
       }
       break;
     case kTypedDataUint32ArrayCid: {
         Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptUint32Load);
         __ lw(result, element_address);
         // Verify that the unsigned value in 'result' can fit inside a Smi.
         __ LoadImmediate(TMP1, 0xC0000000);
         __ and_(CMPRES, result, TMP1);
         __ bne(CMPRES, ZR, deopt);
@@ skipping 688 matching lines @@
 
 
 void CheckStackOverflowInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   __ TraceSimMsg("CheckStackOverflowInstr");
   CheckStackOverflowSlowPath* slow_path = new CheckStackOverflowSlowPath(this);
   compiler->AddSlowPathCode(slow_path);
 
   __ LoadImmediate(TMP1, Isolate::Current()->stack_limit_address());
 
   __ lw(TMP1, Address(TMP1));
-  __ BranchLessEqual(SP, TMP1, slow_path->entry_label());
+  __ BranchUnsignedLessEqual(SP, TMP1, slow_path->entry_label());
 
   __ Bind(slow_path->exit_label());
 }
 
 
 LocationSummary* BinarySmiOpInstr::MakeLocationSummary() const {
   const intptr_t kNumInputs = 2;
   if (op_kind() == Token::kTRUNCDIV) {
     UNIMPLEMENTED();
     return NULL;
@@ skipping 543 matching lines @@
     // Unconditionally deoptimize for constant bounds checks because they
     // only occur only when index is out-of-bounds.
     __ b(deopt);
     return;
   }
 
   if (locs()->in(1).IsConstant()) {
     Register length = locs()->in(0).reg();
     const Object& constant = locs()->in(1).constant();
     ASSERT(constant.IsSmi());
-    __ BranchLessEqual(length, reinterpret_cast<int32_t>(constant.raw()),
-                      deopt);
+    __ BranchUnsignedLessEqual(
+        length, reinterpret_cast<int32_t>(constant.raw()), deopt);
   } else if (locs()->in(0).IsConstant()) {
     ASSERT(locs()->in(0).constant().IsSmi());
     const Smi& smi_const = Smi::Cast(locs()->in(0).constant());
     Register index = locs()->in(1).reg();
-    __ BranchGreaterEqual(index, reinterpret_cast<int32_t>(smi_const.raw()),
-                          deopt);
+    __ BranchUnsignedGreaterEqual(
+        index, reinterpret_cast<int32_t>(smi_const.raw()), deopt);
   } else {
     Register length = locs()->in(0).reg();
     Register index = locs()->in(1).reg();
-    __ BranchGreaterEqual(index, length, deopt);
+    __ BranchUnsignedGreaterEqual(index, length, deopt);
   }
 }
 
 
 LocationSummary* UnboxIntegerInstr::MakeLocationSummary() const {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
@@ skipping 368 matching lines @@
                          &label,
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS