projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| cccda09f UD |
1 | /* Copyright (C) 1996 Free Software Foundation, Inc. |
| 2 | Contributed by Richard Henderson (rth@tamu.edu) | |
| 3 | ||
| 4 | This file is part of the GNU C Library. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Library General Public License as | |
| 8 | published by the Free Software Foundation; either version 2 of the | |
| 9 | License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Library General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Library General Public | |
| 17 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 18 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 19 | Cambridge, MA 02139, USA. */ | |
| 20 | ||
| 21 | /* Copy a null-terminated string from SRC to DST. Return a pointer | |
| 22 | to the null-terminator in the source. */ | |
| 23 | ||
| 24 | #include <sysdep.h> | |
| 25 | ||
| 26 | .text | |
| 27 | ||
| 28 | ENTRY(__stpcpy) | |
| 29 | ldgp gp, 0(pv) | |
| 2c6fe0bd UD |
30 | #ifdef PROF |
| 31 | lda AT, _mcount | |
| 32 | jsr AT, (AT), _mcount | |
| 33 | #endif | |
| cccda09f UD |
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) |