mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
94 lines
2.2 KiB
ArmAsm
94 lines
2.2 KiB
ArmAsm
/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
|
|
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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* Append no more than COUNT characters from the null-terminated string SRC
|
|
to the null-terminated string DST. Always null-terminate the new DST. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
.text
|
|
|
|
ENTRY(strncat)
|
|
ldgp gp, 0(pv)
|
|
#ifdef PROF
|
|
.set noat
|
|
lda AT, _mcount
|
|
jsr AT, (AT), _mcount
|
|
.set at
|
|
#endif
|
|
.prologue 1
|
|
|
|
mov a0, v0 # set up return value
|
|
beq a2, $zerocount
|
|
|
|
/* Find the end of the string. */
|
|
|
|
ldq_u t0, 0(a0) # load first quadword (a0 may be misaligned)
|
|
lda t1, -1(zero)
|
|
insqh t1, a0, t1
|
|
andnot a0, 7, a0
|
|
or t1, t0, t0
|
|
cmpbge zero, t0, t1 # t1 <- bitmask: bit i == 1 <==> i-th byte == 0
|
|
bne t1, $found
|
|
|
|
$loop: ldq t0, 8(a0)
|
|
addq a0, 8, a0 # addr += 8
|
|
cmpbge zero, t0, t1
|
|
beq t1, $loop
|
|
|
|
$found: negq t1, t2 # clear all but least set bit
|
|
and t1, t2, t1
|
|
|
|
and t1, 0xf0, t2 # binary search for that set bit
|
|
and t1, 0xcc, t3
|
|
and t1, 0xaa, t4
|
|
cmovne t2, 4, t2
|
|
cmovne t3, 2, t3
|
|
cmovne t4, 1, t4
|
|
addq t2, t3, t2
|
|
addq a0, t4, a0
|
|
addq a0, t2, a0
|
|
|
|
/* Now do the append. */
|
|
|
|
jsr t9, __stxncpy
|
|
|
|
/* Worry about the null termination. */
|
|
|
|
zapnot t0, t8, t1 # was last byte a null?
|
|
bne t1, 0f
|
|
ret
|
|
|
|
0: and t10, 0x80, t1
|
|
bne t1, 1f
|
|
|
|
/* Here there are bytes left in the current word. Clear one. */
|
|
addq t10, t10, t10 # end-of-count bit <<= 1
|
|
zap t0, t10, t0
|
|
stq_u t0, 0(a0)
|
|
ret
|
|
|
|
1: /* Here we must read the next DST word and clear the first byte. */
|
|
ldq_u t0, 8(a0)
|
|
zap t0, 1, t0
|
|
stq_u t0, 8(a0)
|
|
|
|
$zerocount:
|
|
ret
|
|
|
|
END(strncat)
|