l4/pkg/l4re-core/uclibc/lib/contrib/uclibc/libc/string/cris/memcopy.h

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    Modified for use in uClibc (C) 2007 Axis Communications AB.
   5    Minimal modifications: include path name and #undef of WORD_COPY_FWD/BWD
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Library General Public License as
   9    published by the Free Software Foundation; either version 2 of the
  10    License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  19    see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "../generic/memcopy.h"
  22
  23 /* We override the word-copying macros, partly because misalignment in one
  24    pointer isn't cause for a special function, partly because we want to
  25    get rid of all the static functions in generic/memcopy.c; these macros
  26    are only used in memmove.c since we have arch-specific mempcpy, memcpy and
  27    memset.  */
  28
  29 #undef OP_T_THRES
  30 #define OP_T_THRES OPSIZ
  31
  32 #undef WORD_COPY_FWD
  33 #define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes)              \
  34   do                                                                    \
  35     {                                                                   \
  36       unsigned long enddst_bp = dst_bp + nbytes - (nbytes % OPSIZ);     \
  37       nbytes_left = (nbytes % OPSIZ);                                   \
  38       while (dst_bp < (unsigned long) enddst_bp)                        \
  39         {                                                               \
  40           op_t x = *(op_t *) src_bp;                                    \
  41           src_bp += sizeof x;                                           \
  42           *(op_t *) dst_bp = x;                                         \
  43           dst_bp += sizeof x;                                           \
  44         }                                                               \
  45     } while (0)
  46
  47 #undef WORD_COPY_BWD
  48 #define WORD_COPY_BWD(dst_bp, src_bp, nbytes_left, nbytes)              \
  49   do                                                                    \
  50     {                                                                   \
  51       unsigned long enddst_bp = dst_bp - nbytes + (nbytes % OPSIZ);     \
  52       nbytes_left = (nbytes % OPSIZ);                                   \
  53       while (dst_bp > enddst_bp)                                        \
  54         {                                                               \
  55           op_t x;                                                       \
  56           src_bp -= sizeof x;                                           \
  57           x = *(op_t *) src_bp;                                         \
  58           dst_bp -= sizeof x;                                           \
  59           *(op_t *) dst_bp = x;                                         \
  60         }                                                               \
  61     } while (0)