target-s390: Split out disas_jcc Lots of duplicated code replaced with a couple of tables. We no longer attempt to manually invert the logic operation: the comments now match the code. In the fully general test, constant propagate (1 << (3 - cc)) into (8 >> cc). The new function will be usable by non-branch insns as well. Signed-off-by: Richard Henderson <rth@twiddle.net>