Introduce a 64-bit LimEx model.

On 64-bit platforms, the Limex 64 model is implemented in normal GPRs.
On 32-bit platforms, however, 128-bit SSE registers are used for the
runtime implementation.

src/nfa/limex_64.c

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+/*
+ * Copyright (c) 2015-2016, Intel Corporation
+ *
+ * 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 with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file
+ * \brief LimEx NFA: 128-bit SIMD runtime implementations.
+ */
+
+/* Limex64 is unusual on as on 32 bit platforms, at runtime it uses an m128 for
+ * state calculations.
+ */
+
+//#define DEBUG_INPUT
+//#define DEBUG_EXCEPTIONS
+
+#include "limex.h"
+
+#include "accel.h"
+#include "limex_internal.h"
+#include "nfa_internal.h"
+#include "ue2common.h"
+#include "util/bitutils.h"
+#include "util/simd_utils.h"
+
+// Common code
+#define STATE_ON_STACK
+#define ESTATE_ON_STACK
+
+#include "limex_runtime.h"
+
+#define SIZE          64
+#define ENG_STATE_T   u64a
+
+#ifdef ARCH_64_BIT
+#define STATE_T       u64a
+#define LOAD_FROM_ENG load_u64a
+#else
+#define STATE_T       m128
+#define LOAD_FROM_ENG load_m128_from_u64a
+#endif
+
+#include "limex_exceptional.h"
+
+#include "limex_state_impl.h"
+
+#define INLINE_ATTR really_inline
+#include "limex_common_impl.h"
+
+#include "limex_runtime_impl.h"