58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/* Copyright (C) 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdeps/generic/memcopy.h>
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/* We override the word-copying macros, partly because misalignment in one
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pointer isn't cause for a special function, partly because we want to
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get rid of wordcopy.c; these macros are only used in memmove.c (and
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it's sibling bcopy) since we have arch-specific mempcpy, memcpy and
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memset. */
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#undef OP_T_THRES
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#define OP_T_THRES OPSIZ
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#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
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do \
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{ \
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unsigned long enddst_bp = dst_bp + nbytes - (nbytes % OPSIZ); \
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nbytes_left = (nbytes % OPSIZ); \
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while (dst_bp < (unsigned long) enddst_bp) \
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{ \
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op_t x = *(op_t *) src_bp; \
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src_bp += sizeof x; \
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*(op_t *) dst_bp = x; \
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dst_bp += sizeof x; \
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} \
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} while (0)
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#define WORD_COPY_BWD(dst_bp, src_bp, nbytes_left, nbytes) \
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do \
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{ \
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unsigned long enddst_bp = dst_bp - nbytes + (nbytes % OPSIZ); \
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nbytes_left = (nbytes % OPSIZ); \
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while (dst_bp > enddst_bp) \
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{ \
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op_t x; \
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src_bp -= sizeof x; \
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x = *(op_t *) src_bp; \
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dst_bp -= sizeof x; \
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*(op_t *) dst_bp = x; \
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} \
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} while (0)
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