Jon Beniston wrote:
Hi,
I'm trying to get the DFA scheduler in GCC 4.0.0 to schedule loads and
stores, but I can only get it to work for loads. I have an automaton defined
as follows:
(define_automaton "cpu")
(define_cpu_unit "x" "cpu")
(define_cpu_unit "m" "cpu")
(define_insn_reservation "arith" 1 (eq_attr "type" "arith") "x")
(define_insn_reservation "loads" 2 (eq_attr "type" "load") "x,m")
(define_insn_reservation "stores" 3 (eq_attr "type" "store") "x,m*2")
All instructions take one cycle in "x". Loads then take one "m" cycle, while
stores take two "m" cycles. Basically stores aren't fully pipelined.
There is not enough information to say what is wrong. It would be
better if you send gcc output when -fsched-verbose=10 is used.
Vlad
