------- Additional Comments From felix-gcc at fefe dot de 2005-06-15 21:05 ------- (In reply to comment #5) > (In reply to comment #4) > > what about *arithmetic shift* instruction (e.g. SAR on ix86) ? > Nope, try that with a negative number and you will notice that it will not > work.
Actually it does work. 5 SAR 1 == 2; -5 SAR 1 == -2. That's exactly what SAR is for, after all. See the Intel manuals. Or look here: http://faydoc.tripod.com/cpu/sar.htm SAR r/m32, 1 Signed divide* r/m32 by 2, once -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22072