zfs/tests/zfs-tests/tests/functional/simd/simd_supported.ksh

#!/bin/ksh -p
#
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#
# Copyright (c) 2022 by Attila Fülöp <attila@fueloep.org>
#

. $STF_SUITE/include/libtest.shlib

#
# DESCRIPTION:
#       Make sure we have SIMD support, so it will not go away without notice
#
# STRATEGY:
#	1. Test if we are running on a Linux x86 system with SSE support
#       2. If so, check if the zfs_fletcher_4_impl module parameter contains
#	   a sse implementation
#	3. If not fail the test, otherwise pass it

log_note "Testing if we support SIMD instructions (Linux x86 only)"

if !is_linux; then
    log_unsupported "Not a Linux System"
fi

case "$(uname -m)" in
i386|i686|x86_64)
	typeset -R modparam="/sys/module/zcommon/parameters/zfs_fletcher_4_impl"
	if cat /proc/cpuinfo | awk '/^flags/ {print; exit;}' | grep -q sse; then
		log_must grep -q sse "$modparam"
		log_pass "SIMD instructions supported"
	else
		log_unsupported "No FPU present"
	fi
	;;
*)
	log_unsupported "Not a x86 CPU"
	;;
esac