Date: Fri, 12 Oct 2001 09:49:29 -0700 (PDT) From: John Polstra <jdp@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/i386 identcpu.c Message-ID: <200110121649.f9CGnTU21379@freefall.freebsd.org>
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jdp 2001/10/12 09:49:28 PDT
Modified files:
sys/i386/i386 identcpu.c
Log:
Correct the input/output/clobber specifications for the cpuid
instruction. Stefan Keller <dres@earth.serd.org> noticed that CPU
identification was broken when compiled with -O2, and tracked it
down to the asm statement, which was storing values into memory
without specifying that memory was modified. He submitted a patch
which added "memory" as a clobber, but I refined it further to
arrive at this version.
MFC after: 3 days
Revision Changes Path
1.95 +4 -9 src/sys/i386/i386/identcpu.c
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