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

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 025bd891c2273305ea7da6d98d37692ad23bb876..0196aead9c7545de875aadb84b6e0c386631dcd3 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -56,6 +56,34 @@ MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
 }
 
 
+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]);