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Call memcpy in generic mempcpy

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Ondrej Bilka 2013-02-13 12:57:41 +01:00
parent c2af38aa76
commit 170704c9ec
2 changed files with 6 additions and 36 deletions
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ChangeLog
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@ -1,3 +1,7 @@
2013-02-13 Ondřej Bílka <neleai@seznam.cz>
* string/mempcpy.c: Implement by calling memcpy.
2013-02-13 Siddhesh Poyarekar <siddhesh@redhat.com>
* sysdeps/ieee754/dbl-64/mpexp.c (__mpexp): Remove NFA.

38
string/mempcpy.c
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@ -20,48 +20,14 @@
<http://www.gnu.org/licenses/>. */
#include <string.h>
#include <memcopy.h>
#include <pagecopy.h>
#undef mempcpy
#undef __mempcpy
void *
__mempcpy (dstpp, srcpp, len)
void *dstpp;
const void *srcpp;
size_t len;
__mempcpy (void *dest, const void *src, size_t len)
{
unsigned long int dstp = (long int) dstpp;
unsigned long int srcp = (long int) srcpp;
/* Copy from the beginning to the end. */
/* If there not too few bytes to copy, use word copy. */
if (len >= OP_T_THRES)
{
/* Copy just a few bytes to make DSTP aligned. */
len -= (-dstp) % OPSIZ;
BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
/* Copy whole pages from SRCP to DSTP by virtual address manipulation,
as much as possible. */
PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
/* Copy from SRCP to DSTP taking advantage of the known alignment of
DSTP. Number of bytes remaining is put in the third argument,
i.e. in LEN. This number may vary from machine to machine. */
WORD_COPY_FWD (dstp, srcp, len, len);
/* Fall out and copy the tail. */
}
/* There are just a few bytes to copy. Use byte memory operations. */
BYTE_COPY_FWD (dstp, srcp, len);
return (void *) dstp;
return memcpy (dest, src, len) + len;
}
libc_hidden_def (__mempcpy)
weak_alias (__mempcpy, mempcpy)