VM: Intrinsify double arithmetic operations with a smi rhs.

runtime/vm/intrinsifier_ia32.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.
 //
 // 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 1423 matching lines @@
 
 // arg0 is Double, arg1 is unknown.
 void Intrinsifier::Double_lessEqualThan(Assembler* assembler) {
   CompareDoubles(assembler, BELOW_EQUAL);
 }
 
 
 // Expects left argument to be double (receiver). Right argument is unknown.
 // Both arguments are on stack.
 static void DoubleArithmeticOperations(Assembler* assembler, Token::Kind kind) {
-  Label fall_through;
-  TestLastArgumentIsDouble(assembler, &fall_through, &fall_through);
+  Label fall_through, is_smi, double_op;
+  TestLastArgumentIsDouble(assembler, &is_smi, &fall_through);
   // Both arguments are double, right operand is in EAX.
   __ movsd(XMM1, FieldAddress(EAX, Double::value_offset()));
+  __ Bind(&double_op);
   __ movl(EAX, Address(ESP, + 2 * kWordSize));  // Left argument.
   __ movsd(XMM0, FieldAddress(EAX, Double::value_offset()));
   switch (kind) {
     case Token::kADD: __ addsd(XMM0, XMM1); break;
     case Token::kSUB: __ subsd(XMM0, XMM1); break;
     case Token::kMUL: __ mulsd(XMM0, XMM1); break;
     case Token::kDIV: __ divsd(XMM0, XMM1); break;
     default: UNREACHABLE();
   }
   const Class& double_class = Class::Handle(
       Isolate::Current()->object_store()->double_class());
   __ TryAllocate(double_class,
                  &fall_through,
                  Assembler::kNearJump,
                  EAX,  // Result register.
                  EBX);
   __ movsd(FieldAddress(EAX, Double::value_offset()), XMM0);
   __ ret();
+  __ Bind(&is_smi);
+  __ SmiUntag(EAX);
+  __ cvtsi2sd(XMM1, EAX);
+  __ jmp(&double_op);
   __ Bind(&fall_through);
 }
 
 
 void Intrinsifier::Double_add(Assembler* assembler) {
   DoubleArithmeticOperations(assembler, Token::kADD);
 }
 
 
 void Intrinsifier::Double_mul(Assembler* assembler) {
@@ skipping 666 matching lines @@
 void Intrinsifier::Profiler_getCurrentTag(Assembler* assembler) {
   __ LoadIsolate(EAX);
   __ movl(EAX, Address(EAX, Isolate::current_tag_offset()));
   __ ret();
 }
 
 #undef __
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32