Intrinsify [] for ExternalUint8 and Uint8 typed data.

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 419 matching lines @@
 
 
 // Gets the length of a TypedData.
 void Intrinsifier::TypedData_getLength(Assembler* assembler) {
   __ lw(T0, Address(SP, 0 * kWordSize));
   __ Ret();
   __ delay_slot()->lw(V0, FieldAddress(T0, TypedData::length_offset()));
 }
 
 
+void Intrinsifier::Uint8Array_getIndexed(Assembler* assembler) {
+  Label fall_through;
+
+  __ lw(T0, Address(SP, + 0 * kWordSize));  // Index.
+
+  __ andi(CMPRES1, T0, Immediate(kSmiTagMask));
+  __ bne(CMPRES1, ZR, &fall_through);  // Index is not an smi, fall through.
+  __ delay_slot()->lw(T1, Address(SP, + 1 * kWordSize));  // Array.
+
+  // Range check.
+  __ lw(T2, FieldAddress(T1, TypedData::length_offset()));
+  __ BranchUnsignedGreaterEqual(T0, T2, &fall_through);
+
+  __ SmiUntag(T0);
+  __ addu(T1, T1, T0);
+  __ lbu(V0, FieldAddress(T1, TypedData::data_offset()));
+  __ Ret();
+  __ delay_slot()->SmiTag(V0);
+
+  __ Bind(&fall_through);
+}
+
+
+void Intrinsifier::ExternalUint8Array_getIndexed(Assembler* assembler) {
+  Label fall_through;
+
+  __ lw(T0, Address(SP, + 0 * kWordSize));  // Index.
+
+  __ andi(CMPRES1, T0, Immediate(kSmiTagMask));
+  __ bne(CMPRES1, ZR, &fall_through);  // Index is not an smi, fall through.
+  __ delay_slot()->lw(T1, Address(SP, + 1 * kWordSize));  // Array.
+
+  // range check

[zra, 2014/05/30 18:11:00]

Range check.

[srdjan, 2014/05/30 19:23:12]

Done.

+  __ lw(T2, FieldAddress(T1, TypedData::length_offset()));
+  __ BranchUnsignedGreaterEqual(T0, T2, &fall_through);
+
+  __ lw(T1, FieldAddress(T1, ExternalTypedData::data_offset()));
+  __ SmiUntag(T0);
+  __ addu(T1, T1, T0);
+  __ lbu(V0, Address(T1, 0));
+  __ Ret();
+  __ delay_slot()->SmiTag(V0);
+
+  __ 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 1249 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