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glibc/ports/sysdeps/alpha/stpcpy.S
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/* Copyright (C) 1996, 2002, 2004 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Richard Henderson <rth@tamu.edu>, 1996. | |
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/>. */ | |
/* Copy a null-terminated string from SRC to DST. Return a pointer | |
to the null-terminator in the source. */ | |
#include <sysdep.h> | |
.text | |
ENTRY(__stpcpy) | |
ldgp gp, 0(pv) | |
#ifdef PROF | |
.set noat | |
lda AT, _mcount | |
jsr AT, (AT), _mcount | |
.set at | |
#endif | |
.prologue 1 | |
jsr t9, __stxcpy # do the work of the copy | |
and t8, 0xf0, t2 # binary search for byte offset of the | |
and t8, 0xcc, t1 # last byte written. | |
and t8, 0xaa, t0 | |
andnot a0, 7, a0 | |
cmovne t2, 4, t2 | |
cmovne t1, 2, t1 | |
cmovne t0, 1, t0 | |
addq a0, t2, v0 | |
addq t0, t1, t0 | |
addq v0, t0, v0 | |
ret | |
END(__stpcpy) | |
weak_alias (__stpcpy, stpcpy) | |
libc_hidden_def (__stpcpy) | |
libc_hidden_builtin_def (stpcpy) |