| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1996-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Richard Henderson <rth@tamu.edu>, 1996. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | /* Copy a null-terminated string from SRC to DST. Return a pointer |
| 20 | to the null-terminator in the source. */ |
| 21 | |
| 22 | #include <sysdep.h> |
| 23 | |
| 24 | .text |
| 25 | |
| 26 | ENTRY(__stpcpy) |
| 27 | ldgp gp, 0(pv) |
| 28 | #ifdef PROF |
| 29 | .set noat |
| 30 | lda AT, _mcount |
| 31 | jsr AT, (AT), _mcount |
| 32 | .set at |
| 33 | #endif |
| 34 | .prologue 1 |
| 35 | |
| 36 | jsr t9, __stxcpy # do the work of the copy |
| 37 | |
| 38 | and t8, 0xf0, t2 # binary search for byte offset of the |
| 39 | and t8, 0xcc, t1 # last byte written. |
| 40 | and t8, 0xaa, t0 |
| 41 | andnot a0, 7, a0 |
| 42 | cmovne t2, 4, t2 |
| 43 | cmovne t1, 2, t1 |
| 44 | cmovne t0, 1, t0 |
| 45 | addq a0, t2, v0 |
| 46 | addq t0, t1, t0 |
| 47 | addq v0, t0, v0 |
| 48 | |
| 49 | ret |
| 50 | |
| 51 | END(__stpcpy) |
| 52 | |
| 53 | weak_alias (__stpcpy, stpcpy) |
| 54 | libc_hidden_def (__stpcpy) |
| 55 | libc_hidden_builtin_def (stpcpy) |