Add initial integrated assembler w/ some Xmm ops.

src/IceMemoryRegion.cpp

+// Copyright (c) 2011, 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.
+//
+// Modified by the Subzero authors.
+//
+//===- subzero/src/IceMemoryRegion.cpp - Memory region --------------------===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the MemoryRegion class. It tracks a pointer plus its
+// bounds for bounds-checking in debug mode.
+//===----------------------------------------------------------------------===//
+
+#include "IceMemoryRegion.h"
+
+namespace Ice {
+
+void MemoryRegion::CopyFrom(uintptr_t offset, const MemoryRegion &from) const {
+  assert(from.pointer() != NULL && from.size() > 0);
+  assert(this->size() >= from.size());
+  assert(offset <= this->size() - from.size());
+  memmove(reinterpret_cast<void *>(start() + offset), from.pointer(),
+          from.size());
+}
+
+} // end of namespace Ice