sysdeps/alpha/alphaev67/stpcpy.S

   1 /* Copyright (C) 2000-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Richard Henderson <rth@redhat.com>.
   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 SRC to DEST returning the address of the terminating 0 in DEST.  */
  20
  21 #include <sysdep.h>
  22
  23         .arch ev6
  24         .set noreorder
  25         .set noat
  26         .text
  27
  28 ENTRY(__stpcpy)
  29         ldgp    gp, 0(pv)
  30 #ifdef PROF
  31         lda     AT, _mcount
  32         jsr     AT, (AT), _mcount
  33 #endif
  34         .prologue 1
  35
  36         .align 4
  37         mov     a0, v0
  38         nop
  39         jsr     t9, __stxcpy
  40
  41         # t8  = bitmask (with one bit set) indicating the last byte written
  42         # a0  = unaligned address of the last *word* written
  43
  44         cttz    t8, t8
  45         andnot  a0, 7, a0
  46         addq    a0, t8, v0
  47         ret
  48
  49         END(__stpcpy)
  50
  51 weak_alias (__stpcpy, stpcpy)
  52 libc_hidden_def (__stpcpy)
  53 libc_hidden_builtin_def (stpcpy)