Author: rlibby Date: Fri Feb 28 18:32:40 2020 New Revision: 358440 URL: https://svnweb.freebsd.org/changeset/base/358440
Log: amd64 pmap.c: minor codegen optimization in flag access Following previous revision, apply the same minor optimization to hand-rolled atomic_fcmpset_128 in pmap.c. Reviewed by: kib, markj Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D23870 Modified: head/sys/amd64/amd64/pmap.c Modified: head/sys/amd64/amd64/pmap.c ============================================================================== --- head/sys/amd64/amd64/pmap.c Fri Feb 28 18:32:36 2020 (r358439) +++ head/sys/amd64/amd64/pmap.c Fri Feb 28 18:32:40 2020 (r358440) @@ -714,8 +714,8 @@ pmap_di_load_invl(struct pmap_invl_gen *ptr, struct pm old_low = new_low = 0; old_high = new_high = (uintptr_t)0; - __asm volatile("lock;cmpxchg16b\t%1;sete\t%0" - : "=r" (res), "+m" (*ptr), "+a" (old_low), "+d" (old_high) + __asm volatile("lock;cmpxchg16b\t%1" + : "=@cce" (res), "+m" (*ptr), "+a" (old_low), "+d" (old_high) : "b"(new_low), "c" (new_high) : "memory", "cc"); if (res == 0) { @@ -742,8 +742,8 @@ pmap_di_store_invl(struct pmap_invl_gen *ptr, struct p old_low = old_val->gen; old_high = (uintptr_t)old_val->next; - __asm volatile("lock;cmpxchg16b\t%1;sete\t%0" - : "=r" (res), "+m" (*ptr), "+a" (old_low), "+d" (old_high) + __asm volatile("lock;cmpxchg16b\t%1" + : "=@cce" (res), "+m" (*ptr), "+a" (old_low), "+d" (old_high) : "b"(new_low), "c" (new_high) : "memory", "cc"); return (res); _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
