arith14.0   [plain text]

# $FreeBSD$
# Check that <</>> use the low bits of the shift count.

if [ $((1<<16<<16)) = 0 ]; then
	width=32
elif [ $((1<<32<<32)) = 0 ]; then
	width=64
elif [ $((1<<64<<64)) = 0 ]; then
	width=128
elif [ $((1<<64>>64)) = 1 ]; then
	# Integers are wider than 128 bits; assume arbitrary precision.
	# Nothing to test here.
	exit 0
else
	echo "Cannot determine integer width"
	exit 2
fi

twowidth=$((width * 2))
j=43 k=$((1 << (width - 2))) r=0

i=0
while [ $i -lt $twowidth ]; do
	if [ "$((j << i))" != "$((j << (i + width)))" ]; then
		echo "Problem with $j << $i"
		r=2
	fi
	i=$((i + 1))
done

i=0
while [ $i -lt $twowidth ]; do
	if [ "$((k >> i))" != "$((k >> (i + width)))" ]; then
		echo "Problem with $k >> $i"
		r=2
	fi
	i=$((i + 1))
done

exit $r