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Date: Tue, 27 Aug 2013 12:22:06 -0400
From: Rich Felker <dalias@...ifal.cx>
To: musl@...ts.openwall.com
Subject: Re: Optimized C memset [v2]
Here's version 2 (filename version 6, in honor of glibc ;) of the
memset code. I fixed a bug in the logic for coverage of the tail (the
part past what's covered by the loop) for some values of n and
alignments, and cleaned up the __GNUC__ usage a bit to use less
#ifdeffery. The remaining test at the top for the __GNUC__ version is
ugly, I admit, and should possibly just be removed and replaced by a
configure check to add -D__may_alias__= to the CFLAGS if the compiler
defines __GNUC__ but does not recognize __attribute__((__may_alias__))
-- opinions on this?
Rich
View attachment "memset6.c" of type "text/plain" (1276 bytes)
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