Implements exception handler stub on MIPS.

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 2298 matching lines @@
                                         right.reg(),
                                         needs_number_check());
   }
 
   Condition true_condition = (kind() == Token::kEQ_STRICT) ? EQ : NE;
   branch->EmitBranchOnCondition(compiler, true_condition);
 }
 
 
 LocationSummary* BooleanNegateInstr::MakeLocationSummary() const {
-  UNIMPLEMENTED();
-  return NULL;
+  return LocationSummary::Make(1,
+                               Location::RequiresRegister(),
+                               LocationSummary::kNoCall);
 }
 
 
 void BooleanNegateInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
-  UNIMPLEMENTED();
+  Register value = locs()->in(0).reg();
+  Register result = locs()->out().reg();
+
+  __ LoadObject(result, Bool::True());
+  __ LoadObject(TMP1, Bool::False());
+  __ subu(CMPRES, value, result);
+  __ movz(result, TMP1, CMPRES);  // If value is True, move False into result.
 }
 
 
 LocationSummary* ChainContextInstr::MakeLocationSummary() const {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 void ChainContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
@@ skipping 45 matching lines @@
                          &label,
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS