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use the ffs32 from bitops.h which is faster

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This commit is contained in:
christos 2007-11-02 21:05:06 +00:00
parent cf1c3898fb
commit 2f1af36850
1 changed files with 6 additions and 9 deletions
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15
common/lib/libc/string/ffs.c
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@ -1,4 +1,4 @@
/* $NetBSD: ffs.c,v 1.2 2007/06/04 18:19:27 christos Exp $ */ /* $NetBSD: ffs.c,v 1.3 2007/11/02 21:05:06 christos Exp $ */
/*- /*-
* Copyright (c) 1990, 1993 * Copyright (c) 1990, 1993
@ -34,10 +34,13 @@
#if 0 #if 0
static char sccsid[] = "@(#)ffs.c 8.1 (Berkeley) 6/4/93"; static char sccsid[] = "@(#)ffs.c 8.1 (Berkeley) 6/4/93";
#else #else
__RCSID("$NetBSD: ffs.c,v 1.2 2007/06/04 18:19:27 christos Exp $"); __RCSID("$NetBSD: ffs.c,v 1.3 2007/11/02 21:05:06 christos Exp $");
#endif #endif
#endif /* LIBC_SCCS and not lint */ #endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/bitops.h>
#if !defined(_KERNEL) && !defined(_STANDALONE) #if !defined(_KERNEL) && !defined(_STANDALONE)
#include <string.h> #include <string.h>
#else #else
@ -53,11 +56,5 @@ __RCSID("$NetBSD: ffs.c,v 1.2 2007/06/04 18:19:27 christos Exp $");
int int
ffs(int mask) ffs(int mask)
{ {
int bit; return ffs32((uint32_t)mask);
if (mask == 0)
return(0);
for (bit = 1; !(mask & 1); bit++)
mask >>= 1;
return(bit);
} }