Adds intrinsics for arm64.

runtime/vm/intermediate_language_arm64.cc

 // Copyright (c) 2014, 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_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 2436 matching lines @@
   __ Bind(slow_path->exit_label());
 }
 
 
 static void EmitJavascriptOverflowCheck(FlowGraphCompiler* compiler,
                                         Range* range,
                                         Label* overflow,
                                         Register result) {
   if (!range->IsWithin(-0x20000000000000LL, 0x20000000000000LL)) {
     ASSERT(overflow != NULL);
-    __ CompareImmediate(result, -0x20000000000000LL, PP);
-    __ b(overflow, LT);
-    __ CompareImmediate(result, 0x20000000000000LL, PP);
-    __ b(overflow, GT);
+    __ LoadImmediate(TMP, 0x20000000000000LL, PP);
+    __ add(TMP2, result, Operand(TMP));
+    __ cmp(TMP2, Operand(TMP, LSL, 1));
+    __ b(overflow, HI);
   }
 }
 
 
 static void EmitSmiShiftLeft(FlowGraphCompiler* compiler,
                              BinarySmiOpInstr* shift_left) {
   const bool is_truncating = shift_left->is_truncating();
   const LocationSummary& locs = *shift_left->locs();
   Register left = locs.in(0).reg();
   Register result = locs.out(0).reg();
@@ skipping 91 matching lines @@
     }
   } else {
     if (right_needs_check) {
       ASSERT(shift_left->CanDeoptimize());
       __ CompareImmediate(
           right, reinterpret_cast<int64_t>(Smi::New(Smi::kBits)), PP);
       __ b(deopt, CS);
     }
     // Left is not a constant.
     // Check if count too large for handling it inlined.
-    __ Asr(TMP, right, kSmiTagSize);  // SmiUntag right into IP.
-    // Overflow test (preserve left, right, and IP);
+    __ Asr(TMP, right, kSmiTagSize);  // SmiUntag right into TMP.
+    // Overflow test (preserve left, right, and TMP);
     Register temp = locs.temp(0).reg();
     __ lslv(temp, left, TMP);
     __ asrv(TMP2, temp, TMP);
     __ CompareRegisters(left, TMP2);
     __ b(deopt, NE);  // Overflow.
     // Shift for result now we know there is no overflow.
     __ lslv(result, left, TMP);
   }
   if (FLAG_throw_on_javascript_int_overflow) {
     EmitJavascriptOverflowCheck(compiler, shift_left->range(), deopt, result);
@@ skipping 1903 matching lines @@
   compiler->GenerateCall(token_pos(),
                          &label,
                          PcDescriptors::kOther,
                          locs());
   __ Drop(ArgumentCount());  // Discard arguments.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64