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Deal with delta being negative on machines which signed shifts don't shift 1's.

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This commit is contained in:
christos 2007-05-17 00:36:12 +00:00
parent 885f3f0a50
commit 7ac2181da6
1 changed files with 9 additions and 3 deletions
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12
usr.sbin/timed/timed/correct.c
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@ -1,4 +1,4 @@
/* $NetBSD: correct.c,v 1.13 2007/01/26 16:12:41 christos Exp $ */
/* $NetBSD: correct.c,v 1.14 2007/05/17 00:36:12 christos Exp $ */
/*-
* Copyright (c) 1985, 1993 The Regents of the University of California.
@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)correct.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: correct.c,v 1.13 2007/01/26 16:12:41 christos Exp $");
__RCSID("$NetBSD: correct.c,v 1.14 2007/05/17 00:36:12 christos Exp $");
#endif
#endif /* not lint */
@ -140,7 +140,13 @@ adjclock(struct timeval *corr)
&& delta < MIN_ROUND*1000) {
if (smoother <= 4)
smoother++;
ndelta = delta >> smoother;
ndelta = (unsigned long)delta >> smoother;
if (delta < 0) {
long mask = (long)~0 &
~((1 << ((sizeof(long) * NBBY) - smoother))
- 1);
ndelta |= mask;
}
if (trace)
fprintf(fd,
"trimming delta %ld usec to %ld\n",