On 06/25/2011 01:18 AM, Nick Clifton wrote: > Hi Alex, Hi Jeff, Hi Richard, > > The clzsi2/bsch patterns in the MN10300 backend do not work. There > are two problems - firstly the starting bit-search position for the > BSCH instruction is not set.
Yes it is. What do you think that "unused" second operand does? > Secondly the BSCH instruction returns > the bit position of the highest set bit, not the number of leading > zeros. Ah, I do see that. I recommend you put the xor in the clz expander rather than cluttering up the "bsch" pattern. r~
