linux-kernel - Re: [PATCH 4/5] Glue code for optmized Poly1305 implementation for ppc64le.

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Message-ID: <ZEdovn1XbEUptK+m@gondor.apana.org.au>
Date:   Tue, 25 Apr 2023 13:44:30 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Danny Tsen <dtsen@...ux.ibm.com>
Cc:     linux-crypto@...r.kernel.org, leitao@...ian.org,
        nayna@...ux.ibm.com, appro@...ptogams.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        mpe@...erman.id.au, ltcgcw@...ux.vnet.ibm.com, dtsen@...ibm.com
Subject: Re: [PATCH 4/5] Glue code for optmized Poly1305 implementation for
 ppc64le.

On Mon, Apr 24, 2023 at 02:47:25PM -0400, Danny Tsen wrote:
>
> +	if (likely(srclen >= POLY1305_BLOCK_SIZE)) {
> +		bytes = round_down(srclen, POLY1305_BLOCK_SIZE);
> +		used = crypto_poly1305_setdctxkey(dctx, src, bytes);
> +		if (likely(used)) {
> +			srclen -= used;
> +			src += used;
> +		}
> +		if (srclen >= POLY1305_BLOCK_SIZE*4) {
> +			vsx_begin();

Your chacha code has a SIMD-fallback, how come this one doesn't?

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt