[PATCH][AArch64] Add aes and sha reservations for Thunderx2t99

James Greenhalgh james.greenhalgh@arm.com
Wed Mar 8 17:39:00 GMT 2017


On Mon, Mar 06, 2017 at 05:09:58AM +0000, Hurugalawadi, Naveen wrote:
> Hi,
> 
> Please find attached the patch that adds aes and sha reservations for
> Thunderx2t99.
> 
> Bootstrapped and Regression tested on aarch64-thunder-linux.
> Please review the patch and let us know if its okay for Stage-1?
> 
> Thanks,
> Naveen
> 
> 2017-03-06  Julian Brown  <julian@codesourcery.com>
> 	    Naveen H.S  <Naveen.Hurugalawadi@cavium.com>
> 
> 	* config/aarch64/thunderx2t99.md (thunderx2t99_crc): New Reservation.

> diff --git a/gcc/config/aarch64/thunderx2t99.md b/gcc/config/aarch64/thunderx2t99.md
> index f807547..2eb136b 100644
> --- a/gcc/config/aarch64/thunderx2t99.md
> +++ b/gcc/config/aarch64/thunderx2t99.md
> @@ -443,7 +443,22 @@
>         (eq_attr "type" "neon_store2_one_lane,neon_store2_one_lane_q"))
>    "thunderx2t99_ls01,thunderx2t99_f01")
>  
> +;; Crypto extensions.
> +
> +; FIXME: Forwarding path for aese/aesmc or aesd/aesimc pairs?

Do you need these if you've enabled instruction fusion?

I'm not sure on the exact mechanics of how instruction fusion works, and
whether you'd get further scheduling benefits from modeling a forwarding
path if one exists.

Regardless, this patch is OK for Stage 1.

Thanks,
James

> +(define_insn_reservation "thunderx2t99_aes" 5
> +  (and (eq_attr "tune" "thunderx2t99")
> +       (eq_attr "type" "crypto_aese,crypto_aesmc"))
> +  "thunderx2t99_f1")
> +
>  (define_insn_reservation "thunderx2t99_pmull" 5
>    (and (eq_attr "tune" "thunderx2t99")
>         (eq_attr "type" "crypto_pmull"))
>    "thunderx2t99_f1")
> +
> +(define_insn_reservation "thunderx2t99_sha" 7
> +  (and (eq_attr "tune" "thunderx2t99")
> +       (eq_attr "type" "crypto_sha1_fast,crypto_sha1_xor,crypto_sha1_slow,\
> +			crypto_sha256_fast,crypto_sha256_slow"))
> +  "thunderx2t99_f1")



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