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Implement new Vermicelli16 acceleration functions using SVE2.

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The scheme utilises the MATCH and NMATCH instructions to
scan for 16 characters at the same rate as vermicelli
scans for one.

Change-Id: Ie2cef904c56651e6108593c668e9b65bc001a886
This commit is contained in:
George Wort
2021-06-28 16:29:43 +01:00
committed by Konstantinos Margaritis
parent b6a7ee7e84
commit b54710d208
25 changed files with 1153 additions and 8 deletions
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11
src/nfa/accel_dfa_build_strat.cpp
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@@ -1,5 +1,6 @@
/*
* Copyright (c) 2015-2017, Intel Corporation
* Copyright (c) 2021, Arm Limited
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -33,6 +34,7 @@
#include "nfagraph/ng_limex_accel.h"
#include "shufticompile.h"
#include "trufflecompile.h"
#include "vermicellicompile.h"
#include "util/accel_scheme.h"
#include "util/charreach.h"
#include "util/container.h"
@@ -514,6 +516,15 @@ accel_dfa_build_strat::buildAccel(UNUSED dstate_id_t this_idx,
return;
}
#ifdef HAVE_SVE2
if (info.cr.count() <= 16) {
accel->accel_type = ACCEL_VERM16;
vermicelli16Build(info.cr, (u8 *)&accel->verm16.mask);
DEBUG_PRINTF("state %hu is vermicelli16\n", this_idx);
return;
}
#endif // HAVE_SVE2
if (info.cr.count() > max_floating_stop_char()) {
accel->accel_type = ACCEL_NONE;
DEBUG_PRINTF("state %hu is too broad\n", this_idx);