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Re: Potential issue with strstr on x86 with sse4.2 in glibc-2.18
- From: Alexander Monakov <amonakov at ispras dot ru>
- To: Rich Felker <dalias at aerifal dot cx>
- Cc: libc-alpha at sourceware dot org
- Date: Mon, 19 Aug 2013 22:51:48 +0400 (MSK)
- Subject: Re: Potential issue with strstr on x86 with sse4.2 in glibc-2.18
- References: <520E181D dot 2040308 at archlinux dot org> <alpine dot LNX dot 2 dot 00 dot 1308191628370 dot 2626 at monopod dot intra dot ispras dot ru> <20130819144648 dot GF20515 at brightrain dot aerifal dot cx> <alpine dot LNX dot 2 dot 00 dot 1308191924490 dot 2626 at monopod dot intra dot ispras dot ru> <20130819163712 dot GG20515 at brightrain dot aerifal dot cx> <alpine dot LNX dot 2 dot 00 dot 1308192045480 dot 2626 at monopod dot intra dot ispras dot ru> <20130819170550 dot GH20515 at brightrain dot aerifal dot cx> <CABtfrpCaT2tzBCcnuNPUryiPkJbSytm7b+JOVf_jCFQMFAAvEw at mail dot gmail dot com> <20130819180722 dot GI20515 at brightrain dot aerifal dot cx>
On Mon, 19 Aug 2013, Rich Felker wrote:
> That sounds like a plausible explanation, actually. Are you aware of
> the GCC version where alignment was first introduced?
No. To provide a data point, gcc-3.4 does not align mod 16 with -Os.