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/*
* 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.
*/
#ifndef GOUGH_INTERNAL_H
#define GOUGH_INTERNAL_H
#include "accel.h"
#include "mcclellan_internal.h"
#include "ue2common.h"
#define INVALID_SLOT (~0U)
#define GOUGH_INS_END 0
#define GOUGH_INS_MOV 1
#define GOUGH_INS_NEW 2
#define GOUGH_INS_MIN 3
/* todo: add instructions targeting acc reg? */
struct gough_ins {
u32 op; /* u32 to avoid padding */
u32 dest;
u32 src; /* for GOUGH_INS_NEW, this specifies the adjustment to apply to the
* current offset */
};
/*
* HAPPY FUN ASCII ART TIME
*
* ----
* | | struct NFA
* ----
* ~~~~ normal(ish) mcclellan engine
* ~~~~
* ~~~~
* ~~~~
* ~~~~
* ~~~~
* ~~~~
* ~~~~
* ---- = m->haig_offset
* | | } struct gough_info
* ----
* | | }
* | | } edge prog table -> provides the offset of the start of the program
* | | } to run when the edge is taken. 0 indicates no
* | | } work to do
* ---- = h->top_prog_offset
* | | }
* | | } top prog table -> provides the offset of the start of the program
* | | } to run when a top is taken from this state. 0
* | | } indicates nothing to do
* ---- = h->prog_base_offset
* | | }
* | | } programs to run
* | | }
* | | }
* ----
*/
struct gough_info {
u32 top_prog_offset; /**< offset to the base of the top prog table */
u32 prog_base_offset; /**< not used at runtime */
u32 stream_som_loc_count; /**< number of som locs in the stream state */
u8 stream_som_loc_width; /**< number of bytes per som loc */
};
static really_inline
const struct gough_info *get_gough(const struct mcclellan *m) {
assert(m->haig_offset);
const char *n = (const char *)m - sizeof(struct NFA);
return (const struct gough_info *)(n + m->haig_offset);
}
static really_inline
const u32 *get_gough_top_offsets(const struct mcclellan *m) {
const struct gough_info *g = get_gough(m);
if (!g->top_prog_offset) {
return NULL;
}
const char *n = (const char *)m - sizeof(struct NFA);
return (const u32 *)(n + g->top_prog_offset);
}
/* Gough state representation in scratch.
*
* During execution, gough tracks a number of variables containing potential
* starts of match. These are all stored in a large array of u64a slots.
*/
struct gough_som_info {
u64a slots[1]; /* 'flexible' member array */
};
struct gough_report {
ReportID r;
u32 som; /* som slot to report */
};
struct gough_report_list {
u32 count;
struct gough_report report[];
};
struct gough_accel {
union AccelAux accel;
u8 margin_dist;
u32 prog_offset;
};
#endif
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