Date: Tue, 19 Feb 2013 15:02:17 +0000 (UTC) From: "Cherry G. Mathew" <cherry@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r246993 - projects/amd64_xen_pv/sys/amd64/include/xen Message-ID: <201302191502.r1JF2HwT046360@svn.freebsd.org>
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Author: cherry Date: Tue Feb 19 15:02:17 2013 New Revision: 246993 URL: http://svnweb.freebsd.org/changeset/base/246993 Log: Add assembler for 64bit locked exchange. Approved by: gibbs (implicit) Modified: projects/amd64_xen_pv/sys/amd64/include/xen/xen-os.h Modified: projects/amd64_xen_pv/sys/amd64/include/xen/xen-os.h ============================================================================== --- projects/amd64_xen_pv/sys/amd64/include/xen/xen-os.h Tue Feb 19 14:39:10 2013 (r246992) +++ projects/amd64_xen_pv/sys/amd64/include/xen/xen-os.h Tue Feb 19 15:02:17 2013 (r246993) @@ -220,6 +220,11 @@ static __inline unsigned long __xchg(uns :"=r" (x) :"m" (*__xg(ptr)), "0" (x) :"memory"); + case 8: + __asm__ __volatile__("xchgq %0,%1" + :"=r" (x) + :"m" (*__xg(ptr)), "0" (x) + :"memory"); break; } return x;help
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