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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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10
src/nfa/mpvcompile.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 "nfa_internal.h"
#include "shufticompile.h"
#include "trufflecompile.h"
#include "vermicellicompile.h"
#include "util/alloc.h"
#include "util/multibit_build.h"
#include "util/order_check.h"
@@ -175,6 +177,14 @@ void writeKiloPuff(const map<ClusterKey, vector<raw_puff>>::const_iterator &it,
size_t set = reach.find_first();
assert(set != CharReach::npos);
kp->u.verm.c = (char)set;
#ifdef HAVE_SVE2
} else if (reach.count() >= 240) {
kp->type = MPV_VERM16;
vermicelli16Build(~reach, (u8 *)&kp->u.verm16.mask);
} else if (reach.count() <= 16) {
kp->type = MPV_NVERM16;
vermicelli16Build(reach, (u8 *)&kp->u.verm16.mask);
#endif // HAVE_SVE2
} else if (shuftiBuildMasks(~reach, (u8 *)&kp->u.shuf.mask_lo,
(u8 *)&kp->u.shuf.mask_hi) != -1) {
kp->type = MPV_SHUFTI;