On 04/09/14 07:08, Bin Cheng wrote:
> @@ -1872,7 +1892,9 @@ const struct tune_params arm_cortex_a53_tune =
> {true, true}, /* Prefer non short
> circuit. */
> &arm_default_vec_cost, /* Vectorizer costs. */
> false, /* Prefer Neon for 64-bits
> bitops. */
> - false, false /* Prefer 32-bit encodings.
> */
> + false, false, /* Prefer 32-bit encodings.
> */
> + false, /* Prefer Neon for stringops.
> */
> + 8 /* Maximum insns to inline
> memset. */
> };
>
> const struct tune_params arm_cortex_a57_tune =
> @@ -1889,7 +1911,9 @@ const struct tune_params arm_cortex_a57_tune =
> {true, true}, /* Prefer non short circuit.
> */
> &arm_default_vec_cost, /* Vectorizer costs. */
> false, /* Prefer Neon for 64-bits
> bitops. */
> - true, true /* Prefer 32-bit encodings.
> */
> + true, true, /* Prefer 32-bit encodings.
> */
> + false, /* Prefer Neon for stringops.
> */
> + 8 /* Maximum insns to inline
> memset. */
> };
Why don't we use Neon for Cortex-(A53,A57)? We've used it for
Cortex-(A7,A8,A15).
R
