Intrinsify Float32Array_getIndexed on IA32 and X64.

runtime/vm/intrinsifier_ia32.cc

 // Copyright (c) 2012, 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 540 matching lines @@
 
 bool Intrinsifier::Int32Array_getIndexed(Assembler* assembler) {
   return false;
 }
 
 
 bool Intrinsifier::Uint32Array_getIndexed(Assembler* assembler) {
   return false;
 }
 
+bool Intrinsifier::Float32Array_getIndexed(Assembler* assembler) {
+  Label fall_through;
+  TestByteArrayIndex(assembler, &fall_through);
+  // After TestByteArrayIndex:
+  // * EAX has the base address of the byte array.
+  // * EBX has the index into the array.
+  // EBX contains the SMI index which is shifted left by 1.
+  // This shift means we only multiply the index by 2 not 4 (sizeof float).
+  // Load single precision float into XMM7.
+  __ movss(XMM7, FieldAddress(EAX, EBX, TIMES_2,
+                              Float32Array::data_offset()));
+  // Convert into a double precision float.
+  __ cvtss2sd(XMM7, XMM7);
+  // Allocate a double instance.
+  const Class& double_class = Class::Handle(
+                          Isolate::Current()->object_store()->double_class());
+  AssemblerMacros::TryAllocate(assembler,
+                               double_class,
+                               &fall_through,
+                               Assembler::kNearJump, EAX);
+  // Store XMM7 into double instance.
+  __ movsd(FieldAddress(EAX, Double::value_offset()), XMM7);
+  __ ret();
+  __ Bind(&fall_through);
+  return false;
+}
+
+bool Intrinsifier::Float32Array_setIndexed(Assembler* assembler) {
+    return false;
+}
 
 // Tests if two top most arguments are smis, jumps to label not_smi if not.
 // Topmost argument is in EAX.
 static void TestBothArgumentsSmis(Assembler* assembler, Label* not_smi) {
   __ movl(EAX, Address(ESP, + 1 * kWordSize));
   __ movl(EBX, Address(ESP, + 2 * kWordSize));
   __ orl(EBX, EAX);
   __ testl(EBX, Immediate(kSmiTagMask));
   __ j(NOT_ZERO, not_smi, Assembler::kNearJump);
 }
@@ skipping 859 matching lines @@
   __ Bind(&is_true);
   __ LoadObject(EAX, bool_true);
   __ ret();
   return true;
 }
 
 #undef __
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32