Intrinsify Float32Array_getIndexed on IA32 and X64.

runtime/vm/intrinsifier_x64.cc

Index: runtime/vm/intrinsifier_x64.cc
diff --git a/runtime/vm/intrinsifier_x64.cc b/runtime/vm/intrinsifier_x64.cc
index 15a9c865ce6ecff3aedc0a60c7087cd79a897908..ff313c0ebc950769a4aa99b59d8fe94d2a7a2f07 100644
--- a/runtime/vm/intrinsifier_x64.cc
+++ b/runtime/vm/intrinsifier_x64.cc
@@ -512,6 +512,36 @@ bool Intrinsifier::Uint32Array_getIndexed(Assembler* assembler) {
   return false;
 }
 
+bool Intrinsifier::Float32Array_getIndexed(Assembler* assembler) {
+    Label fall_through;
+    TestByteArrayIndex(assembler, &fall_through);
+    // After TestByteArrayIndex:
+    // RAX has the base address of the byte array
+    // RBX has the index into the array
+
+    // Load single precision float into XMM7
+    __ movss(XMM7, FieldAddress(RAX, RBX, TIMES_4,
+                                Float32Array::data_offset()));
+    // Convert into a double precision float
+    __ cvtss2sd(XMM6, 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, RAX);
+    // Store XMM6 into double instance

[srdjan, 2012/09/09 14:26:52]

ditto for comments here

[Cutch, 2012/09/10 14:44:43]

Done.

+    __ movsd(FieldAddress(RAX, Double::value_offset()), XMM6);
+    __ 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 RAX.