mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
88 lines
2.2 KiB
ArmAsm
88 lines
2.2 KiB
ArmAsm
/* Copyright (C) 2000-2018 Free Software Foundation, Inc.
|
|
Contributed by Richard Henderson <rth@tamu.edu>, 1996.
|
|
EV67 optimized by Rick Gorton <rick.gorton@alpha-processor.com>.
|
|
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
|
|
<http://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>
|
|
|
|
.arch ev6
|
|
.set noreorder
|
|
.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 # U :
|
|
/* Find the end of the string. */
|
|
ldq_u t0, 0(a0) # L : load first quadword (a0 may be misaligned)
|
|
lda t1, -1 # E :
|
|
|
|
insqh t1, v0, t1 # U :
|
|
andnot a0, 7, a0 # E :
|
|
nop # E :
|
|
or t1, t0, t0 # E :
|
|
|
|
nop # E :
|
|
nop # E :
|
|
cmpbge zero, t0, t1 # E : bits set iff byte == 0
|
|
bne t1, $found # U :
|
|
|
|
$loop: ldq t0, 8(a0) # L :
|
|
addq a0, 8, a0 # E :
|
|
cmpbge zero, t0, t1 # E :
|
|
beq t1, $loop # U :
|
|
|
|
$found: cttz t1, t2 # U0 :
|
|
addq a0, t2, a0 # E :
|
|
jsr t9, __stxncpy # L0 : Now do the append.
|
|
|
|
/* Worry about the null termination. */
|
|
|
|
cttz t10, t2 # U0: byte offset of end-of-count.
|
|
bic a0, 7, a0 # E : word align the last write address.
|
|
zapnot t0, t8, t1 # U : was last byte a null?
|
|
nop # E :
|
|
|
|
bne t1, 0f # U :
|
|
nop # E :
|
|
nop # E :
|
|
ret # L0 :
|
|
|
|
0: addq t2, a0, a0 # E : address of end-of-count
|
|
stb zero, 1(a0) # L :
|
|
nop # E :
|
|
ret # L0 :
|
|
|
|
$zerocount:
|
|
nop # E :
|
|
nop # E :
|
|
nop # E :
|
|
ret # L0 :
|
|
|
|
END(strncat)
|