Intrinsify [] for ExternalUint8 and Uint8 typed data.

runtime/vm/intrinsifier_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/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 23 matching lines @@
 
 void Intrinsifier::Array_getIndexed(Assembler* assembler) {
   Label fall_through;
 
   __ ldr(R0, Address(SP, + 0 * kWordSize));  // Index
   __ ldr(R1, Address(SP, + 1 * kWordSize));  // Array
 
   __ tsti(R0, kSmiTagMask);
   __ b(&fall_through, NE);  // Index is not an smi, fall through.
 
-  // range check
+  // Range check.
   __ ldr(R6, FieldAddress(R1, Array::length_offset()));
   __ cmp(R0, Operand(R6));
   __ b(&fall_through, CS);
 
   ASSERT(kSmiTagShift == 1);
   // array element at R1 + R0*4 + Array::data_offset - 1
   __ add(R6, R1, Operand(R0, LSL, 2));
   __ ldr(R0, FieldAddress(R6, Array::data_offset()));
   __ ret();
   __ Bind(&fall_through);
@@ skipping 166 matching lines @@
 
 void Intrinsifier::GrowableList_getIndexed(Assembler* assembler) {
   Label fall_through;
 
   __ ldr(R0, Address(SP, + 0 * kWordSize));  // Index
   __ ldr(R1, Address(SP, + 1 * kWordSize));  // Array
 
   __ tsti(R0, kSmiTagMask);
   __ b(&fall_through, NE);  // Index is not an smi, fall through.
 
-  // range check
+  // Range check.
   __ ldr(R6, FieldAddress(R1, GrowableObjectArray::length_offset()));
   __ cmp(R0, Operand(R6));
   __ b(&fall_through, CS);
 
   ASSERT(kSmiTagShift == 1);
   // array element at R6 + R0 * 4 + Array::data_offset - 1
   __ ldr(R6, FieldAddress(R1, GrowableObjectArray::data_offset()));  // Data
   __ add(R6, R6, Operand(R0, LSL, 2));
   __ ldr(R0, FieldAddress(R6, Array::data_offset()));
   __ ret();
@@ skipping 105 matching lines @@
 
 
 // Gets the length of a TypedData.
 void Intrinsifier::TypedData_getLength(Assembler* assembler) {
   __ ldr(R0, Address(SP, 0 * kWordSize));
   __ ldr(R0, FieldAddress(R0, TypedData::length_offset()));
   __ ret();
 }
 
 
+void Intrinsifier::Uint8Array_getIndexed(Assembler* assembler) {
+  Label fall_through;
+  __ ldr(R0, Address(SP, + 0 * kWordSize));  // Index.
+  __ ldr(R1, Address(SP, + 1 * kWordSize));  // Array.
+  __ tsti(R0, kSmiTagMask);
+  __ b(&fall_through, NE);  // Index is not a smi, fall through.
+
+  // Range check.
+  __ ldr(R6, FieldAddress(R1, TypedData::length_offset()));
+  __ cmp(R0, Operand(R6));
+  __ b(&fall_through, CS);
+
+  // Array element at R1 + R0 + TypedData::data_offset - 1.
+  // Untag R0.
+  __ add(R1, R1, Operand(R0, LSR, 1));
+  __ ldr(R0, FieldAddress(R1, TypedData::data_offset()), kUnsignedByte);
+  __ SmiTag(R0);
+  __ ret();
+  __ Bind(&fall_through);
+}
+
+
+void Intrinsifier::ExternalUint8Array_getIndexed(Assembler* assembler) {
+  Label fall_through;
+
+  __ ldr(R0, Address(SP, + 0 * kWordSize));  // Index.
+  __ ldr(R1, Address(SP, + 1 * kWordSize));  // Array.
+  __ tsti(R0, kSmiTagMask);
+  __ b(&fall_through, NE);  // Index is not a smi, fall through.
+
+  // Range check.
+  __ ldr(R6, FieldAddress(R1, TypedData::length_offset()));
+  __ cmp(R0, Operand(R6));
+  __ b(&fall_through, CS);
+
+  __ ldr(R1, FieldAddress(R1, ExternalTypedData::data_offset()));
+
+  // Untag R0.
+  __ add(R1, R1, Operand(R0, LSR, 1));
+  __ ldr(R0, Address(R1, 0), kUnsignedByte);
+  __ SmiTag(R0);
+  __ ret();
+  __ Bind(&fall_through);
+}
+
+
 static int GetScaleFactor(intptr_t size) {
   switch (size) {
     case 1: return 0;
     case 2: return 1;
     case 4: return 2;
     case 8: return 3;
     case 16: return 4;
   }
   UNREACHABLE();
   return -1;
@@ skipping 1184 matching lines @@
   Isolate* isolate = Isolate::Current();
   __ LoadImmediate(R1, reinterpret_cast<uword>(isolate), kNoPP);
   // Set return value to Isolate::current_tag_.
   __ ldr(R0, Address(R1, Isolate::current_tag_offset()));
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64