Date: Fri, 25 Jul 2003 08:54:23 -0700 (PDT) From: Bruce Evans <bde@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/libkern scanc.c Message-ID: <200307251554.h6PFsOxg031023@repoman.freebsd.org>
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bde 2003/07/25 08:54:23 PDT
FreeBSD src repository
Modified files:
sys/libkern scanc.c
Log:
Backed out the micro-optimization in 1.4. It was to help gcc-2.6.3
on i486's (and probably i386's), but it has had very little effect
since gcc-2.7 or gcc-2.95. With gcc-3.3, it gave a small
pessimization for at least i386's, athlon-xp's and pentium4's, a
small optimization (I think) for pentium1's, and made no difference
for i386's. (movzbl is best for all the later processors, and the
micro-optimization was to stop it being used on i486's.)
Revision Changes Path
1.10 +1 -6 src/sys/libkern/scanc.c
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