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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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12
src/nfa/accel.c
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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:
@@ -81,6 +82,17 @@ const u8 *run_accel(const union AccelAux *accel, const u8 *c, const u8 *c_end) {
c_end - 1);
break;
#ifdef HAVE_SVE2
case ACCEL_VERM16:
DEBUG_PRINTF("accel verm16 %p %p\n", c, c_end);
if (c_end - c < 16) {
return c;
}
rv = vermicelli16Exec(accel->verm16.mask, c, c_end);
break;
#endif // HAVE_SVE2
case ACCEL_DVERM_MASKED:
DEBUG_PRINTF("accel dverm masked %p %p\n", c, c_end);
if (c + 16 + 1 >= c_end) {