dfa: adding new Sheng engine

A new shuffle-based DFA engine, complete with acceleration and smallwrite.

src/nfa/sheng_internal.h

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 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.
+ */
+
+#ifndef SHENG_INTERNAL_H_
+#define SHENG_INTERNAL_H_
+
+#include "ue2common.h"
+#include "util/simd_utils.h"
+
+#define SHENG_STATE_ACCEPT 0x10
+#define SHENG_STATE_DEAD 0x20
+#define SHENG_STATE_ACCEL 0x40
+#define SHENG_STATE_MASK 0xF
+#define SHENG_STATE_FLAG_MASK 0x70
+
+#define SHENG_FLAG_SINGLE_REPORT 0x1
+#define SHENG_FLAG_CAN_DIE 0x2
+#define SHENG_FLAG_HAS_ACCEL 0x4
+
+struct report_list {
+    u32 count;
+    ReportID report[];
+};
+
+struct sstate_aux {
+    u32 accept;
+    u32 accept_eod;
+    u32 accel;
+    u32 top;
+};
+
+struct sheng {
+    m128 shuffle_masks[256];
+    u32 length;
+    u32 aux_offset;
+    u32 report_offset;
+    u32 accel_offset;
+    u8 n_states;
+    u8 anchored;
+    u8 floating;
+    u8 flags;
+    ReportID report;
+};
+
+#endif /* SHENG_INTERNAL_H_ */