d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add libkern ffsll() for parity with flsll()

Browse Source 
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D3962
This commit is contained in:
Conrad Meyer 2015-10-22 20:28:37 +00:00
parent 9034852c84
commit 3d3e385e75
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=289765
9 changed files with 58 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sys/conf/files.arm
View File

@ -120,6 +120,7 @@ libkern/ashldi3.c standard
libkern/ashrdi3.c standard
libkern/divdi3.c standard
libkern/ffsl.c standard
libkern/ffsll.c standard
libkern/fls.c standard
libkern/flsl.c standard
libkern/flsll.c standard

1
sys/conf/files.arm64
View File

@ -82,6 +82,7 @@ kern/subr_dummy_vdso_tc.c standard
libkern/bcmp.c standard
libkern/ffs.c standard
libkern/ffsl.c standard
libkern/ffsll.c standard
libkern/fls.c standard
libkern/flsl.c standard
libkern/flsll.c standard

1
sys/conf/files.i386
View File

@ -530,6 +530,7 @@ kern/imgact_aout.c optional compat_aout
kern/imgact_gzip.c optional gzip
kern/subr_sfbuf.c standard
libkern/divdi3.c standard
libkern/ffsll.c standard
libkern/flsll.c standard
libkern/memmove.c standard
libkern/memset.c standard

1
sys/conf/files.mips
View File

@ -56,6 +56,7 @@ kern/subr_sfbuf.c optional mips | mipsel | mipsn32
# gcc/clang runtime
libkern/ffsl.c standard
libkern/ffsll.c standard
libkern/fls.c standard
libkern/flsl.c standard
libkern/flsll.c standard

1
sys/conf/files.pc98
View File

@ -222,6 +222,7 @@ kern/imgact_aout.c optional compat_aout
kern/imgact_gzip.c optional gzip
kern/subr_sfbuf.c standard
libkern/divdi3.c standard
libkern/ffsll.c standard
libkern/flsll.c standard
libkern/memmove.c standard
libkern/memset.c standard

1
sys/conf/files.powerpc
View File

@ -87,6 +87,7 @@ libkern/cmpdi2.c optional powerpc
libkern/divdi3.c optional powerpc
libkern/ffs.c standard
libkern/ffsl.c standard
libkern/ffsll.c standard
libkern/fls.c standard
libkern/flsl.c standard
libkern/flsll.c standard

1
sys/conf/files.sparc64
View File

@ -67,6 +67,7 @@ kern/syscalls.c optional ktr
kern/subr_sfbuf.c standard
libkern/ffs.c standard
libkern/ffsl.c standard
libkern/ffsll.c standard
libkern/fls.c standard
libkern/flsl.c standard
libkern/flsll.c standard

48
sys/libkern/ffsll.c Normal file
View File

@ -0,0 +1,48 @@
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/libkern.h>
/*
* Find First Set bit
*/
int
ffsll(long long mask)
{
int bit;
if (mask == 0)
return (0);
for (bit = 1; !(mask & 1); bit++)
mask = (unsigned long long)mask >> 1;
return (bit);
}

3
sys/sys/libkern.h
View File

@ -89,6 +89,9 @@ int ffs(int);
#ifndef HAVE_INLINE_FFSL
int ffsl(long);
#endif
#ifndef HAVE_INLINE_FFSLL
int ffsll(long long);
#endif
#ifndef HAVE_INLINE_FLS
int fls(int);
#endif