Date: Mon, 15 Jan 2001 19:45:55 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/include mutex.h Message-ID: <200101160345.f0G3juR67937@freefall.freebsd.org>
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jhb 2001/01/15 19:45:55 PST
Modified files:
sys/i386/include mutex.h
Log:
- Use "+a" instead of "=&a" for several constraints. This should fix
compiling errors where gcc would run out of registers.
- Add "cc" to the list of clobbers for micro-ops where we perform
instructions that alter %eflags.
- Use xchgl instead of cmpxchgl to release a spin lock. This could allow
for more efficient register allocation as we no longer mandate that %eax
be used.
- Reenable the optimized mutex micro-ops in the non-i386 case.
Revision Changes Path
1.23 +20 -26 src/sys/i386/include/mutex.h
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