Implement bigint shift intrinsics on x64.

runtime/vm/intrinsifier_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/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 765 matching lines @@
   __ Ret();
   __ delay_slot()->addiu(V0, V0, Immediate(-1));  // Remove inverted smi-tag.
 }
 
 
 void Intrinsifier::Smi_bitLength(Assembler* assembler) {
   // TODO(sra): Implement.
 }
 
 
+void Intrinsifier::Bigint_lsh(Assembler* assembler) {
+  // TODO(regis): Implement.
+}
+
+
+void Intrinsifier::Bigint_rsh(Assembler* assembler) {
+  // TODO(regis): Implement.
+}
+
+
 void Intrinsifier::Bigint_absAdd(Assembler* assembler) {
   // static void _absAdd(Uint32List digits, int used,
   //                     Uint32List a_digits, int a_used,
   //                     Uint32List r_digits)
 
   // T2 = used, T3 = digits
   __ lw(T2, Address(SP, 3 * kWordSize));
   __ lw(T3, Address(SP, 4 * kWordSize));
   // T3 = &digits[0]
   __ addiu(T3, T3, Immediate(TypedData::data_offset() - kHeapObjectTag));
@@ skipping 1233 matching lines @@
   Isolate* isolate = Isolate::Current();
   __ LoadImmediate(V0, reinterpret_cast<uword>(isolate));
   // Set return value.
   __ Ret();
   __ delay_slot()->lw(V0, Address(V0, Isolate::current_tag_offset()));
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS