Inline Doubles truncate and round.

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2012, 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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 2192 matching lines @@
   // Overflow is signalled with minint.
   Label do_call, done;
   // Check for overflow and that it fits into Smi.
   __ movq(temp, result);
   __ shlq(temp, Immediate(1));
   __ j(OVERFLOW, deopt);
   __ SmiTag(result);
 }
 
 
+LocationSummary* DoubleToDoubleInstr::MakeLocationSummary() const {
+  const intptr_t kNumInputs = 1;
+  const intptr_t kNumTemps =
+      (recognized_kind() == MethodRecognizer::kDoubleRound) ? 1 : 0;
+  LocationSummary* result =
+      new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
+  result->set_in(0, Location::RequiresXmmRegister());
+  result->set_out(Location::RequiresXmmRegister());
+  if (recognized_kind() == MethodRecognizer::kDoubleRound) {
+    result->set_temp(0, Location::RequiresXmmRegister());
+  }
+  return result;
+}
+
+
+void DoubleToDoubleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  XmmRegister value = locs()->in(0).xmm_reg();
+  XmmRegister result = locs()->out().xmm_reg();
+  if (recognized_kind() == MethodRecognizer::kDoubleTruncate) {
+    __ roundsd(result, value,  Assembler::kRoundToZero);
+  } else {
+    XmmRegister temp = locs()->temp(0).xmm_reg();
+    __ DoubleRound(result, value, temp);
+  }
+}
+
+
 LocationSummary* PolymorphicInstanceCallInstr::MakeLocationSummary() const {
   return MakeCallSummary();
 }
 
 
 void PolymorphicInstanceCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Label* deopt = compiler->AddDeoptStub(instance_call()->deopt_id(),
                                         kDeoptPolymorphicInstanceCallTestFail);
   if (ic_data().NumberOfChecks() == 0) {
     __ jmp(deopt);
@@ skipping 218 matching lines @@
 
 void ShiftMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   UNIMPLEMENTED();
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64