| 1 | /* Copyright (C) 1996-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library. If not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | /* Copy a null-terminated string from SRC to DST. Return a pointer |
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| 19 | to the null-terminator in the source. */ |
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| 20 | |
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| 21 | #include <sysdep.h> |
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| 22 | |
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| 23 | .text |
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| 24 | |
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| 25 | ENTRY(__stpcpy) |
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| 26 | ldgp gp, 0(pv) |
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| 27 | #ifdef PROF |
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| 28 | .set noat |
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| 29 | lda AT, _mcount |
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| 30 | jsr AT, (AT), _mcount |
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| 31 | .set at |
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| 32 | #endif |
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| 33 | .prologue 1 |
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| 34 | |
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| 35 | jsr t9, __stxcpy # do the work of the copy |
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| 36 | |
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| 37 | and t8, 0xf0, t2 # binary search for byte offset of the |
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| 38 | and t8, 0xcc, t1 # last byte written. |
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| 39 | and t8, 0xaa, t0 |
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| 40 | andnot a0, 7, a0 |
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| 41 | cmovne t2, 4, t2 |
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| 42 | cmovne t1, 2, t1 |
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| 43 | cmovne t0, 1, t0 |
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| 44 | addq a0, t2, v0 |
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| 45 | addq t0, t1, t0 |
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| 46 | addq v0, t0, v0 |
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| 47 | |
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| 48 | ret |
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| 49 | |
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| 50 | END(__stpcpy) |
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| 51 | |
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| 52 | weak_alias (__stpcpy, stpcpy) |
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| 53 | libc_hidden_def (__stpcpy) |
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| 54 | libc_hidden_builtin_def (stpcpy) |
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| 55 | |
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