ping
> -----Original Message-----
> From: Wilco Dijkstra [mailto:wdijk...@arm.com]
> Sent: 05 March 2015 14:49
> To: gcc-patches@gcc.gnu.org
> Subject: [PATCH][AArch64] Fix Cortex-A53 shift costs
>
> This patch fixes the shift costs for Cortex-A53 so they are more accurate -
> immediate shifts
> use SBFM/UBFM which takes 2 cycles, register controlled shifts take 1 cycle.
> Bootstrap and
> regression OK.
>
> ChangeLog:
> 2015-03-05 Wilco Dijkstra <wdijk...@arm.com>
>
> * gcc/config/arm/aarch-cost-tables.h (cortexa53_extra_costs):
> Make Cortex-A53 shift costs more accurate.
>
> ---
> gcc/config/arm/aarch-cost-tables.h | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/gcc/config/arm/aarch-cost-tables.h
> b/gcc/config/arm/aarch-cost-tables.h
> index 05e96a9..6bb8ede 100644
> --- a/gcc/config/arm/aarch-cost-tables.h
> +++ b/gcc/config/arm/aarch-cost-tables.h
> @@ -130,12 +130,12 @@ const struct cpu_cost_table cortexa53_extra_costs =
> 0, /* arith. */
> 0, /* logical. */
> COSTS_N_INSNS (1), /* shift. */
> - COSTS_N_INSNS (2), /* shift_reg. */
> + 0, /* shift_reg. */
> COSTS_N_INSNS (1), /* arith_shift. */
> - COSTS_N_INSNS (2), /* arith_shift_reg. */
> + COSTS_N_INSNS (1), /* arith_shift_reg. */
> COSTS_N_INSNS (1), /* log_shift. */
> - COSTS_N_INSNS (2), /* log_shift_reg. */
> - 0, /* extend. */
> + COSTS_N_INSNS (1), /* log_shift_reg. */
> + COSTS_N_INSNS (1), /* extend. */
> COSTS_N_INSNS (1), /* extend_arith. */
> COSTS_N_INSNS (1), /* bfi. */
> COSTS_N_INSNS (1), /* bfx. */
> --
> 1.9.1
