On Sun, Nov 08, 2015 at 07:37:53PM -0500, Michael Meissner wrote: > This patch adds support for scalar count trailing zeros instruction that is > being added to ISA 3.0 (power9).
I bet you should change CTZ_DEFINED_VALUE_AT_ZERO as well. > +(define_insn "ctz<mode>2_hw" > + [(set (match_operand:GPR 0 "gpc_reg_operand" "=r") > + (ctz:GPR (match_operand:GPR 1 "gpc_reg_operand" "r")))] > + "TARGET_CTZ" > + "cnttz<wd> %0,%1" > + [(set_attr "type" "cntlz")]) We should probably rename this attr value now. "cntz" maybe? Could be later of course. Segher
