Date: Sat, 12 Apr 2014 19:58:31 +0000 (UTC) From: Andreas Tobler <andreast@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r264376 - stable/9/sys/powerpc/include Message-ID: <201404121958.s3CJwVSJ013795@svn.freebsd.org>
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Author: andreast Date: Sat Apr 12 19:58:31 2014 New Revision: 264376 URL: http://svnweb.freebsd.org/changeset/base/264376 Log: MFC r260610: Described in the man page but not implemented. Here it comes, atomic_swap_32/64. The latter only for powerpc64. Modified: stable/9/sys/powerpc/include/atomic.h Directory Properties: stable/9/sys/ (props changed) Modified: stable/9/sys/powerpc/include/atomic.h ============================================================================== --- stable/9/sys/powerpc/include/atomic.h Sat Apr 12 19:57:15 2014 (r264375) +++ stable/9/sys/powerpc/include/atomic.h Sat Apr 12 19:58:31 2014 (r264376) @@ -666,10 +666,47 @@ atomic_fetchadd_long(volatile u_long *p, return (value); } +static __inline u_int +atomic_swap_32(volatile u_int *p, u_int v) +{ + u_int prev; + + __asm __volatile( + "1: lwarx %0,0,%2\n" + " stwcx. %3,0,%2\n" + " bne- 1b\n" + : "=&r" (prev), "+m" (*(volatile u_int *)p) + : "r" (p), "r" (v) + : "cc", "memory"); + + return (prev); +} + +#ifdef __powerpc64__ +static __inline u_long +atomic_swap_64(volatile u_long *p, u_long v) +{ + u_long prev; + + __asm __volatile( + "1: ldarx %0,0,%2\n" + " stdcx. %3,0,%2\n" + " bne- 1b\n" + : "=&r" (prev), "+m" (*(volatile u_long *)p) + : "r" (p), "r" (v) + : "cc", "memory"); + + return (prev); +} +#endif + #define atomic_fetchadd_32 atomic_fetchadd_int +#define atomic_swap_int atomic_swap_32 #ifdef __powerpc64__ #define atomic_fetchadd_64 atomic_fetchadd_long +#define atomic_swap_long atomic_swap_64 +#define atomic_swap_ptr atomic_swap_64 #endif #endif /* ! _MACHINE_ATOMIC_H_ */
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