Date: Sun, 5 Jul 2009 21:16:26 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r195382 - projects/mips/sys/mips/include Message-ID: <200907052116.n65LGQfO059892@svn.freebsd.org>
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Author: imp Date: Sun Jul 5 21:16:26 2009 New Revision: 195382 URL: http://svn.freebsd.org/changeset/base/195382 Log: addu and subu are special. We need to use daddu and dsubu here to get proper behavior. Submitted by: jmallet@ Modified: projects/mips/sys/mips/include/atomic.h Modified: projects/mips/sys/mips/include/atomic.h ============================================================================== --- projects/mips/sys/mips/include/atomic.h Sun Jul 5 20:44:50 2009 (r195381) +++ projects/mips/sys/mips/include/atomic.h Sun Jul 5 21:16:26 2009 (r195382) @@ -220,7 +220,7 @@ atomic_add_64(__volatile uint64_t *p, ui __asm __volatile ( "1:\n\t" "lld %0, %3\n\t" /* load old value */ - "addu %0, %2, %0\n\t" /* calculate new value */ + "daddu %0, %2, %0\n\t" /* calculate new value */ "scd %0, %1\n\t" /* attempt to store */ "beqz %0, 1b\n\t" /* spin if failed */ : "=&r" (temp), "=m" (*p) @@ -236,7 +236,7 @@ atomic_subtract_64(__volatile uint64_t * __asm __volatile ( "1:\n\t" "lld %0, %3\n\t" /* load old value */ - "subu %0, %2\n\t" /* calculate new value */ + "dsubu %0, %2\n\t" /* calculate new value */ "scd %0, %1\n\t" /* attempt to store */ "beqz %0, 1b\n\t" /* spin if failed */ : "=&r" (temp), "=m" (*p)
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