Date: Tue, 10 May 2011 21:18:45 +0000 (UTC) From: Marius Strobl <marius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r221750 - head/sys/sparc64/include Message-ID: <201105102118.p4ALIjrD060522@svn.freebsd.org>
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Author: marius Date: Tue May 10 21:18:45 2011 New Revision: 221750 URL: http://svn.freebsd.org/changeset/base/221750 Log: Add an ATOMIC_CLEAR_LONG. Modified: head/sys/sparc64/include/asmacros.h Modified: head/sys/sparc64/include/asmacros.h ============================================================================== --- head/sys/sparc64/include/asmacros.h Tue May 10 18:44:40 2011 (r221749) +++ head/sys/sparc64/include/asmacros.h Tue May 10 21:18:45 2011 (r221750) @@ -90,6 +90,17 @@ bne,pn %icc, 9b ; \ mov r3, r2 +/* + * Atomically clear a number of bits of an u_long in memory. + */ +#define ATOMIC_CLEAR_LONG(r1, r2, r3, bits) \ + ldx [r1], r2 ; \ +9: andn r2, bits, r3 ; \ + casxa [r1] ASI_N, r2, r3 ; \ + cmp r2, r3 ; \ + bne,pn %icc, 9b ; \ + mov r3, r2 + #define PCPU(member) PCPU_REG + PC_ ## member #define PCPU_ADDR(member, reg) \ add PCPU_REG, PC_ ## member, reg
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