Intrinsify Double.toInt.

runtime/vm/intrinsifier_ia32.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.
 //
 // The intrinsic code below is executed before a method has built its frame.
 // The return address is on the stack and the arguments below it.
 // Registers EDX (arguments descriptor) and ECX (function) must be preserved.
 // Each intrinsification method returns true if the corresponding
 // Dart method was intrinsified.
 
@@ skipping 1151 matching lines @@
   __ Bind(&is_zero);
   // Check for negative zero (get the sign bit).
   __ movmskpd(EAX, XMM0);
   __ testl(EAX, Immediate(1));
   __ j(NOT_ZERO, &is_true, Assembler::kNearJump);
   __ jmp(&is_false, Assembler::kNearJump);
   return true;  // Method is complete, no slow case.
 }
 
 
+bool Intrinsifier::Double_toInt(Assembler* assembler) {
+  __ movl(EAX, Address(ESP, +1 * kWordSize));
+  __ movsd(XMM0, FieldAddress(EAX, Double::value_offset()));
+  __ cvttsd2si(EAX, XMM0);
+  // Overflow is signalled with minint.
+  Label fall_through;
+  // Check for overflow and that it fits into Smi.
+  __ cmpl(EAX, Immediate(0xC0000000));
+  __ j(NEGATIVE, &fall_through, Assembler::kNearJump);
+  __ SmiTag(EAX);
+  __ ret();
+  __ Bind(&fall_through);
+  return false;
+}
+
+
 // Argument type is not known
 bool Intrinsifier::Math_sqrt(Assembler* assembler) {
   Label fall_through, is_smi, double_op;
   TestLastArgumentIsDouble(assembler, &is_smi, &fall_through);
   // Argument is double and is in EAX.
   __ movsd(XMM1, FieldAddress(EAX, Double::value_offset()));
   __ Bind(&double_op);
   __ sqrtsd(XMM0, XMM1);
   const Class& double_class = Class::Handle(
       Isolate::Current()->object_store()->double_class());
@@ skipping 225 matching lines @@
   __ Bind(&is_true);
   __ LoadObject(EAX, bool_true);
   __ ret();
   return true;
 }
 
 #undef __
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32