Add signed/unsigned 8-bit and 16-bit Representations

src/ia32/macro-assembler-ia32.cc

 // Copyright 2012 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 38 matching lines @@
       allow_stub_calls_(true),
       has_frame_(false) {
   if (isolate() != NULL) {
     // TODO(titzer): should we just use a null handle here instead?
     code_object_ = Handle<Object>(isolate()->heap()->undefined_value(),
                                   isolate());
   }
 }
 
 
+void MacroAssembler::Load(Register dst, const Operand& src, Representation r) {
+  ASSERT(!r.IsDouble());
+  if (r.IsInteger8()) {
+    movsx_b(dst, src);
+  } else if (r.IsUInteger8()) {
+    movzx_b(dst, src);
+  } else if (r.IsInteger16()) {
+    movsx_w(dst, src);
+  } else if (r.IsUInteger16()) {
+    movzx_w(dst, src);
+  } else {
+    mov(dst, src);
+  }
+}
+
+
+void MacroAssembler::Store(Register src, const Operand& dst, Representation r) {
+  ASSERT(!r.IsDouble());
+  if (r.IsInteger8() || r.IsUInteger8()) {
+    mov_b(dst, src);
+  } else if (r.IsInteger16() || r.IsUInteger16()) {
+    mov_w(dst, src);
+  } else {
+    mov(dst, src);
+  }
+}
+
+
 void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) {
   if (isolate()->heap()->RootCanBeTreatedAsConstant(index)) {
     Handle<Object> value(&isolate()->heap()->roots_array_start()[index]);
     mov(destination, value);
     return;
   }
   ExternalReference roots_array_start =
       ExternalReference::roots_array_start(isolate());
   mov(destination, Immediate(index));
   mov(destination, Operand::StaticArray(destination,
@@ skipping 3478 matching lines @@
   cmp(scratch_reg, Operand::StaticVariable(new_space_allocation_top));
   j(greater, no_memento_found);
   cmp(MemOperand(scratch_reg, -AllocationMemento::kSize),
       Immediate(isolate()->factory()->allocation_memento_map()));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32