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- /* Copyright (C) 2000-2026 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 a null-terminated string from SRC to DST. */
- #include <sysdep.h>
- .arch ev6
- .set noreorder
- .text
- ENTRY(strcat)
- ldgp gp, 0(pv)
- #ifdef PROF
- .set noat
- lda AT, _mcount
- jsr AT, (AT), _mcount
- .set at
- #endif
- .prologue 1
- mov $16, $0 # E : set up return value
- /* Find the end of the string. */
- ldq_u $1, 0($16) # L : load first quadword (a0 may be misaligned)
- lda $2, -1 # E :
- insqh $2, $16, $2 # U :
- andnot $16, 7, $16 # E :
- or $2, $1, $1 # E :
- cmpbge $31, $1, $2 # E : bits set iff byte == 0
- bne $2, $found # U :
- $loop: ldq $1, 8($16) # L :
- addq $16, 8, $16 # E :
- cmpbge $31, $1, $2 # E :
- beq $2, $loop # U :
- $found: cttz $2, $3 # U0 :
- addq $16, $3, $16 # E :
- /* Now do the append. */
- mov $26, $23 # E :
- jmp $31, __stxcpy # L0 :
- END(strcat)
- libc_hidden_builtin_def (strcat)
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