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Re: [PATCH, libcpp] Faster line lexer.
- From: Uros Bizjak <ubizjak at gmail dot com>
- To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Cc: Ondrej Bilka <neleai at seznam dot cz>
- Date: Fri, 10 Jul 2015 11:37:18 +0200
- Subject: Re: [PATCH, libcpp] Faster line lexer.
- Authentication-results: sourceware.org; auth=none
Hello!
> As I wrote at
>
> [PATCH, libcpp]: Use asm flag outputs in search_line_sse42 main loop
>
> https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg113610.html
>
> I wont repeat myself with reasons summary is that current sse4.2 code is
> reduntant as it has same performance as sse2 one.
> This improves sse2 performance by around 10% vs sse4.2 code by
> using better header.
Have you tried new SSE4.2 implementation (the one with asm flags) with
unrolled loop?
Uros.