sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S

   1 /* Default memset/bzero implementation for PowerPC64.
   2    Copyright (C) 2013-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #include <sysdep.h>
  20
  21 /* Copied from bzero.S to prevent the linker from inserting a stub
  22    between bzero and memset.  NOTE: this code should be positioned
  23    before ENTRY/END_GEN_TB redefinition.  */
  24 ENTRY (__bzero_ppc)
  25         CALL_MCOUNT 3
  26         mr      r5,r4
  27         li      r4,0
  28         b       L(_memset)
  29 END_GEN_TB (__bzero_ppc,TB_TOCLESS)
  30
  31
  32 #if defined SHARED && IS_IN (libc)
  33 # undef EALIGN
  34 # define EALIGN(name, alignt, words)                            \
  35   .section ".text";                                             \
  36   ENTRY_2(__memset_ppc)                                         \
  37   .align ALIGNARG(alignt);                                      \
  38   EALIGN_W_##words;                                             \
  39   BODY_LABEL(__memset_ppc):                                     \
  40   cfi_startproc;                                                \
  41   LOCALENTRY(__memset_ppc)
  42
  43 # undef END_GEN_TB
  44 # define END_GEN_TB(name, mask)                                 \
  45   cfi_endproc;                                                  \
  46   TRACEBACK_MASK(__memset_ppc,mask)                             \
  47   END_2(__memset_ppc)
  48
  49 # undef libc_hidden_builtin_def
  50 # define libc_hidden_builtin_def(name)
  51 #endif
  52
  53 /* Do not implement __bzero at powerpc64/memset.S.  */
  54 #define NO_BZERO_IMPL
  55
  56 #include <sysdeps/powerpc/powerpc64/memset.S>