Date: Fri, 4 Apr 2003 17:49:54 -0800 (PST) From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 28104 for review Message-ID: <200304050149.h351ns0H090282@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=28104 Change 28104 by peter@peter_daintree on 2003/04/04 17:49:16 implement some more. This is just about done I think. Have to check the gcc manual for how to specify 64 bit regs though. Affected files ... .. //depot/projects/hammer/sys/x86_64/include/atomic.h#6 edit Differences ... ==== //depot/projects/hammer/sys/x86_64/include/atomic.h#6 (text+ko) ==== @@ -141,25 +141,21 @@ static __inline int atomic_cmpset_long(volatile u_long *dst, u_long exp, u_long src) { -#if 0 long res = exp; __asm __volatile ( " " __XSTRING(MPLOCKED) " " - " cmpxchgl %1,%2 ; " + " cmpxchgq %1,%2 ; " " setz %%al ; " " movzbl %%al,%0 ; " "1: " "# atomic_cmpset_int" - : "+a" (res) /* 0 (result) */ + : "+a" (res) /* 0 (result) %rax, XXX check */ : "r" (src), /* 1 */ "m" (*(dst)) /* 2 */ : "memory"); return (res); -#else - return (0); -#endif } #endif /* defined(__GNUC__) */ @@ -392,8 +388,8 @@ u_long result; __asm __volatile ( - " xorl %0,%0 ; " - " xchgl %1,%0 ; " + " xorq %0,%0 ; " + " xchgq %1,%0 ; " "# atomic_readandclear_int" : "=&r" (result) /* 0 (result) */ : "m" (*addr)); /* 1 (addr) */
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