Implement crankshaft support for pixel array loads.

src/ia32/lithium-codegen-ia32.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 984 matching lines @@
 }
 
 
 void LCodeGen::DoFixedArrayLength(LFixedArrayLength* instr) {
   Register result = ToRegister(instr->result());
   Register array = ToRegister(instr->InputAt(0));
   __ mov(result, FieldOperand(array, FixedArray::kLengthOffset));
 }
 
 
+void LCodeGen::DoPixelArrayLength(LPixelArrayLength* instr) {
+  Register result = ToRegister(instr->result());
+  Register array = ToRegister(instr->InputAt(0));
+  __ mov(result, FieldOperand(array, PixelArray::kLengthOffset));
+}
+
+
 void LCodeGen::DoValueOf(LValueOf* instr) {
   Register input = ToRegister(instr->InputAt(0));
   Register result = ToRegister(instr->result());
   Register map = ToRegister(instr->TempAt(0));
   ASSERT(input.is(result));
   NearLabel done;
   // If the object is a smi return the object.
   __ test(input, Immediate(kSmiTagMask));
   __ j(zero, &done);
 
@@ skipping 1002 matching lines @@
   // in the function's map.
   __ bind(&non_instance);
   __ mov(result, FieldOperand(result, Map::kConstructorOffset));
 
   // All done.
   __ bind(&done);
 }
 
 
 void LCodeGen::DoLoadElements(LLoadElements* instr) {
-  ASSERT(instr->result()->Equals(instr->InputAt(0)));
-  Register reg = ToRegister(instr->InputAt(0));
-  __ mov(reg, FieldOperand(reg, JSObject::kElementsOffset));
+  Register result = ToRegister(instr->result());
+  Register input = ToRegister(instr->InputAt(0));
+  __ mov(result, FieldOperand(input, JSObject::kElementsOffset));
   if (FLAG_debug_code) {
     NearLabel done;
-    __ cmp(FieldOperand(reg, HeapObject::kMapOffset),
+    __ cmp(FieldOperand(result, HeapObject::kMapOffset),
            Immediate(Factory::fixed_array_map()));
     __ j(equal, &done);
-    __ cmp(FieldOperand(reg, HeapObject::kMapOffset),
+    __ cmp(FieldOperand(result, HeapObject::kMapOffset),
+           Immediate(Factory::pixel_array_map()));
+    __ j(equal, &done);
+    __ cmp(FieldOperand(result, HeapObject::kMapOffset),
            Immediate(Factory::fixed_cow_array_map()));
-    __ Check(equal, "Check for fast elements failed.");
+    __ Check(equal, "Check for fast elements or pixel array failed.");
     __ bind(&done);
   }
 }
 
 
+void LCodeGen::DoLoadPixelArrayExternalPointer(
+    LLoadPixelArrayExternalPointer* instr) {
+  Register result = ToRegister(instr->result());
+  Register input = ToRegister(instr->InputAt(0));
+  __ mov(result, FieldOperand(input, PixelArray::kExternalPointerOffset));
+}
+
+
 void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
   Register arguments = ToRegister(instr->arguments());
   Register length = ToRegister(instr->length());
   Operand index = ToOperand(instr->index());
   Register result = ToRegister(instr->result());
 
   __ sub(length, index);
   DeoptimizeIf(below_equal, instr->environment());
 
   // There are two words between the frame pointer and the last argument.
@@ skipping 13 matching lines @@
                               key,
                               times_pointer_size,
                               FixedArray::kHeaderSize));
 
   // Check for the hole value.
   __ cmp(result, Factory::the_hole_value());
   DeoptimizeIf(equal, instr->environment());
 }
 
 
+void LCodeGen::DoLoadPixelArrayElement(LLoadPixelArrayElement* instr) {
+  Register external_elements = ToRegister(instr->external_pointer());
+  Register key = ToRegister(instr->key());
+  Register result = ToRegister(instr->result());
+  ASSERT(result.is(external_elements));
+
+  // Load the result.
+  __ movzx_b(result, Operand(external_elements, key, times_1, 0));
+}
+
+
 void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(esi));
   ASSERT(ToRegister(instr->object()).is(edx));
   ASSERT(ToRegister(instr->key()).is(eax));
 
   Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 }
 
 
@@ skipping 1653 matching lines @@
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32