> A few minor nits: Thanks for the hints. The attached patch and changelog below should do now.
> BTW, have you done your paper work with FSF? > Yep. Took a while but it's done now. Cheers, Oleg 2011-09-21 Oleg Endo <oleg.e...@t-online.de> * config/sh/sh.c (andcosts): Renamed to and_xor_ior_costs. Added AND special case. Adapted comments. (sh_rtx_costs): Added XOR and IOR case.
Index: gcc/config/sh/sh.c =================================================================== --- gcc/config/sh/sh.c (revision 178946) +++ gcc/config/sh/sh.c (working copy) @@ -242,7 +242,7 @@ static int flow_dependent_p (rtx, rtx); static void flow_dependent_p_1 (rtx, const_rtx, void *); static int shiftcosts (rtx); -static int andcosts (rtx); +static int and_xor_ior_costs (rtx, int code); static int addsubcosts (rtx); static int multcosts (rtx); static bool unspec_caller_rtx_p (rtx); @@ -2830,14 +2830,15 @@ return shift_insns[value]; } -/* Return the cost of an AND operation. */ +/* Return the cost of an AND/XOR/IOR operation. */ static inline int -andcosts (rtx x) +and_xor_ior_costs (rtx x, int code) { int i; - /* Anding with a register is a single cycle and instruction. */ + /* A logical operation with two registers is a single cycle + instruction. */ if (!CONST_INT_P (XEXP (x, 1))) return 1; @@ -2853,17 +2854,18 @@ } /* These constants are single cycle extu.[bw] instructions. */ - if (i == 0xff || i == 0xffff) + if ((i == 0xff || i == 0xffff) && code == AND) return 1; - /* Constants that can be used in an and immediate instruction in a single - cycle, but this requires r0, so make it a little more expensive. */ + /* Constants that can be used in an instruction as an immediate are + a single cycle, but this requires r0, so make it a little more + expensive. */ if (CONST_OK_FOR_K08 (i)) return 2; - /* Constants that can be loaded with a mov immediate and an and. + /* Constants that can be loaded with a mov immediate need one more cycle. This case is probably unnecessary. */ if (CONST_OK_FOR_I08 (i)) return 2; - /* Any other constants requires a 2 cycle pc-relative load plus an and. + /* Any other constant requires an additional 2 cycle pc-relative load. This case is probably unnecessary. */ return 3; } @@ -3032,7 +3034,9 @@ return true; case AND: - *total = COSTS_N_INSNS (andcosts (x)); + case XOR: + case IOR: + *total = COSTS_N_INSNS (and_xor_ior_costs (x, code)); return true; case MULT: