sh/tests/expansion/arith14.0

   1 # $FreeBSD: head/bin/sh/tests/expansion/arith14.0 270029 2014-08-15 22:36:41Z jilles $
   2 # Check that <</>> use the low bits of the shift count.
   3
   4 if [ $((1<<16<<16)) = 0 ]; then
   5         width=32
   6 elif [ $((1<<32<<32)) = 0 ]; then
   7         width=64
   8 elif [ $((1<<64<<64)) = 0 ]; then
   9         width=128
  10 elif [ $((1<<64>>64)) = 1 ]; then
  11         # Integers are wider than 128 bits; assume arbitrary precision.
  12         # Nothing to test here.
  13         exit 0
  14 else
  15         echo "Cannot determine integer width"
  16         exit 2
  17 fi
  18
  19 twowidth=$((width * 2))
  20 j=43 k=$((1 << (width - 2))) r=0
  21
  22 i=0
  23 while [ $i -lt $twowidth ]; do
  24         if [ "$((j << i))" != "$((j << (i + width)))" ]; then
  25                 echo "Problem with $j << $i"
  26                 r=2
  27         fi
  28         i=$((i + 1))
  29 done
  30
  31 i=0
  32 while [ $i -lt $twowidth ]; do
  33         if [ "$((k >> i))" != "$((k >> (i + width)))" ]; then
  34                 echo "Problem with $k >> $i"
  35                 r=2
  36         fi
  37         i=$((i + 1))
  38 done
  39
  40 exit $r