Initial commit of Hyperscan

src/nfa/limex_native.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2015, 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: native GPR runtime implementations.
+ */
+
+//#define DEBUG
+//#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"
+
+// Common code
+#define STATE_ON_STACK
+#define ESTATE_ON_STACK
+
+#include "limex_runtime.h"
+
+// Other implementation code from X-Macro impl.
+#define SIZE 32
+#define STATE_T u32
+#include "limex_state_impl.h"
+
+#define SIZE 32
+#define STATE_T u32
+#define INLINE_ATTR really_inline
+#include "limex_common_impl.h"
+
+////////////////////////////////////////////////////////////////////////////
+// LimEx NFA implementation code - general purpose registers
+////////////////////////////////////////////////////////////////////////////
+
+// Process exceptional states
+
+#define SIZE 32
+#define STATE_T u32
+#define STATE_ON_STACK
+#define ESTATE_ON_STACK
+#define RUN_EXCEPTION_FN_ONLY
+#include "limex_exceptional.h"
+
+static really_inline
+int processExceptional32(u32 s, u32 estate, UNUSED u32 diffmask, u32 *succ,
+                         const struct LimExNFA32 *limex,
+                         const u32 *exceptionMap,
+                         const struct NFAException32 *exceptions,
+                         const ReportID *exReports, u64a offset,
+                         struct NFAContext32 *ctx, char in_rev, char flags) {
+    assert(estate != 0); // guaranteed by calling macro
+
+    if (estate == ctx->cached_estate) {
+        DEBUG_PRINTF("using cached succ from previous state\n");
+        *succ |= ctx->cached_esucc;
+        if (ctx->cached_reports) {
+            if (unlikely(limexRunReports(ctx->cached_reports, ctx->callback,
+                                         ctx->context, offset)
+                        == MO_HALT_MATCHING)) {
+                return PE_RV_HALT; // halt;
+            }
+        }
+        return 0;
+    }
+
+    u32 orig_estate = estate; // for caching
+    u32 local_succ = 0;
+    struct proto_cache new_cache = {0, NULL};
+    enum CacheResult cacheable = CACHE_RESULT;
+
+    /* Note that only exception-states that consist of exceptions that _only_
+     * set successors (not fire accepts or squash states) are cacheable. */
+
+    do {
+        u32 bit = findAndClearLSB_32(&estate);
+        u32 idx = exceptionMap[bit];
+        const struct NFAException32 *e = &exceptions[idx];
+        if (!runException32(e, s, succ, &local_succ, limex, exReports, offset,
+                            ctx, &new_cache, &cacheable, in_rev, flags)) {
+            return PE_RV_HALT;
+        }
+    } while (estate != 0);
+
+    *succ |= local_succ;
+
+    if (cacheable == CACHE_RESULT) {
+        ctx->cached_estate = orig_estate;
+        ctx->cached_esucc = local_succ;
+        ctx->cached_reports = new_cache.reports;
+        ctx->cached_br = new_cache.br;
+    } else if (cacheable == DO_NOT_CACHE_RESULT_AND_FLUSH_BR_ENTRIES) {
+        ctx->cached_estate = 0U;
+    }
+
+    return 0;
+}
+
+// 32-bit models.
+
+#define SIZE                32
+#define STATE_T             u32
+#define SHIFT               1
+#include "limex_runtime_impl.h"
+
+#define SIZE                32
+#define STATE_T             u32
+#define SHIFT               2
+#include "limex_runtime_impl.h"
+
+#define SIZE                32
+#define STATE_T             u32
+#define SHIFT               3
+#include "limex_runtime_impl.h"
+
+#define SIZE                32
+#define STATE_T             u32
+#define SHIFT               4
+#include "limex_runtime_impl.h"
+
+#define SIZE                32
+#define STATE_T             u32
+#define SHIFT               5
+#include "limex_runtime_impl.h"
+
+#define SIZE                32
+#define STATE_T             u32
+#define SHIFT               6
+#include "limex_runtime_impl.h"
+
+#define SIZE                32
+#define STATE_T             u32
+#define SHIFT               7
+#include "limex_runtime_impl.h"