Add double unary operation (negate). This is a replica of the destrpyed CL https://chromiumcoderevi…

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 "vm/dart_entry.h"
@@ skipping 3212 matching lines @@
     case Token::kBIT_NOT:
       __ nor(result, value, ZR);
       __ addiu(result, result, Immediate(-1));  // Remove inverted smi-tag.
       break;
     default:
       UNREACHABLE();
   }
 }
 
 
+LocationSummary* UnaryDoubleOpInstr::MakeLocationSummary() const {
+  const intptr_t kNumInputs = 1;
+  const intptr_t kNumTemps = 2;
+  LocationSummary* summary =
+      new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
+  summary->set_in(0, Location::RequiresFpuRegister());
+  summary->set_out(Location::RequiresFpuRegister());
+  summary->set_temp(0, Location::RequiresRegister());
+  summary->set_in(2, Location::RequiresFpuRegister());
+  return summary;
+}
+
+
+void UnaryDoubleOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  // TODO(zra): Implement vneg.
+  Register temp = locs()->temp(0).reg();
+  const Double& minus_one = Double::ZoneHandle(Double::NewCanonical(-1));
+  __ LoadObject(temp, minus_one);
+  FpuRegister result = locs()->out().fpu_reg();
+  FpuRegister value = locs()->in(0).fpu_reg();
+  FpuRegister temp_fp = locs()->temp(1).fpu_reg();
+  __ LoadDFromOffset(temp_fp, temp, Double::value_offset() - kHeapObjectTag);
+  __ muld(result, value, temp_fp);
+}
+
+
+
 LocationSummary* SmiToDoubleInstr::MakeLocationSummary() const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps = 0;
   LocationSummary* result =
       new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
   result->set_in(0, Location::WritableRegister());
   result->set_out(Location::RequiresFpuRegister());
   return result;
 }
 
@@ skipping 640 matching lines @@
   compiler->GenerateCall(token_pos(),
                          &label,
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS