Florent DEFAY <spira.inhabitant@xxxxxxxxx> writes:
> I looked over AVR backend but I did not understand some things like:
> 'p' and 'r' are codes introduced to mean that operands should be
> pre-dec or post-inc
> ___________________________________________________________
> ;; p POST_INC or PRE_DEC address as a pointer (X, Y, Z)
> ;; r POST_INC or PRE_DEC address as a register (r26, r28, r30)
> ___________________________________________________________
> but they seem to be never used.
Those are % operands used with PRINT_OPERAND. They are used in avr.c.
Look at, e.g., out_movhi_r_mr.
return (AS2 (sbiw,%r1,2) CR_TAB
AS2 (ld,%A0,%p1) CR_TAB
AS2 (ldd,%B0,%p1+1));
Ian
