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Re: [PATCH] powerpc64: Add POWER8 strnlen
Ping. Any objection to merge this change?
On 03/23/2017 06:14 PM, Carlos Eduardo Seo wrote:
>
> On 3/21/17, 5:11 PM, "Wainer dos Santos Moschetta" <libc-alpha-owner@sourceware.org on behalf of wainersm@linux.vnet.ibm.com> wrote:
>
> Added strnlen POWER8 otimized for long strings. It delivers
> same performance as POWER7 implementation for short strings.
>
> This takes advantage of reasonably performing unaligned loads
> and bit permutes to check the first 1-16 bytes until
> quadword aligned, then checks in 64 bytes strides until unsafe,
> then 16 bytes, truncating the count if need be.
>
> Likewise, the POWER7 code is recycled for less than 32 bytes strings.
>
> Tested on ppc64 and ppc64le.
>
>
>
> LGTM
>
>
> --
> Carlos Eduardo Seo
> Software Engineer - Linux on Power Toolchain
> cseo@linux.vnet.ibm.com
>
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