mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 18:40:14 +00:00
19212f875d
1998-03-09 08:21 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/chown.c: Moved to ... * sysdeps/unix/sysv/linux/i386/chown.c: ...here. * sysdeps/unix/sysv/linux/i386/chown.c: Correct versioning information. * libc.map: Add chown to GLIBC_2.1. * sysdeps/unix/sysv/linux/i386/syscalls.list: Add s_chown here. * sysdeps/unix/sysv/linux/syscalls.list: Remove s_chown here. 1998-03-06 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/generic/ffs.S: Rename function to __ffs and make ffs a weak alias. * sysdeps/alpha/ffs.c: Likewise. * sysdeps/am29k/ffs.c: Likewise. * sysdeps/i386/ffs.c: Likewise. * sysdeps/i960/ffs.c: Likewise. * sysdeps/m68k/ffs.c: Likewise. * sysdeps/m88k/ffs.c: Likewise. * sysdeps/powerpc/ffs.c: Likewise. * sysdeps/rs6000/ffs.c: Likewise. * sysdeps/vax/ffs.s: Likewise. * string/string.h: Declare __ffs. * libc.map: Export it. * elf/dl-profile.c (_dl_start_profile): Use __ffs instead of __builtin_ffs, which is not guaranteed to be namespace clean. 1998-03-06 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/sprof.c: Rewrite symbol handling to use the normal symbol table, which is much more likely to exist than debugging symbols. (printsym): Remove const. (load_shobj): Don't use _dl_pagesize. Fix mapping of section header table. * libc.map: Export __profile_frequency, used by elf/sprof, to avoid infinite recursion during startup. 1998-03-09 12:16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
74 lines
1.8 KiB
ArmAsm
74 lines
1.8 KiB
ArmAsm
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
|
|
Contributed by David Mosberger (davidm@cs.arizona.edu).
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* Finds the first bit set in an integer. Optimized for the Alpha
|
|
architecture. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
.set noreorder
|
|
.set noat
|
|
|
|
ENTRY(__ffs)
|
|
#ifdef PROF
|
|
ldgp gp, 0(pv)
|
|
lda AT, _mcount
|
|
jsr AT, (AT), _mcount
|
|
.prologue 1
|
|
#else
|
|
.prologue 0
|
|
#endif
|
|
|
|
ldq_u zero, 0(sp) # on the 21064, this helps dual-issuing
|
|
addl a0, zero, a0 # the last insn and reduces the stall
|
|
negq a0, t0 # due to the srl instruction
|
|
and a0, t0, t0
|
|
clr v0
|
|
beq a0, $done
|
|
|
|
# now do binary search for first non-zero bit
|
|
|
|
zapnot t0, 0x03, t2
|
|
addq v0, 16, t3
|
|
cmoveq t2, t3, v0
|
|
|
|
zapnot t0, 0x05, t2
|
|
addq v0, 8, t3
|
|
cmoveq t2, t3, v0
|
|
|
|
srl t0, v0, t0
|
|
addq v0, 1, v0
|
|
|
|
and t0, 0x0f, t2
|
|
addq v0, 4, t3
|
|
cmoveq t2, t3, v0
|
|
|
|
and t0, 0x33, t2
|
|
addq v0, 2, t3
|
|
cmoveq t2, t3, v0
|
|
|
|
and t0, 0x55, t2
|
|
addq v0, 1, t3
|
|
cmoveq t2, t3, v0
|
|
|
|
$done: ret
|
|
|
|
END(__ffs)
|
|
weak_alias (__ffs, ffs)
|