diff options
| author | Roland McGrath <roland@gnu.org> | 1995-02-21 08:07:34 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1995-02-21 08:07:34 +0000 |
| commit | 67a87b936eaab25dc983e979e5a548256d1a527a (patch) | |
| tree | cc821a229df7ee0d081df42258c31c241b78c0ef /sysdeps/generic/memcpy.c | |
| parent | 787126fe16e340c8a0c4301d4cab942973d7d85c (diff) | |
* string/Makefile (distribute): Add pagecopy.h.
* sysdeps/mach/pagecopy.h: New file.
* sysdeps/generic/pagecopy.h: New file.
* sysdeps/generic/memcpy.c: Include pagecopy.h; call
PAGE_COPY_FWD_MAYBE first when word aligned.
* sysdeps/generic/memmove.c: Likewise.
Diffstat (limited to 'sysdeps/generic/memcpy.c')
| -rw-r--r-- | sysdeps/generic/memcpy.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/sysdeps/generic/memcpy.c b/sysdeps/generic/memcpy.c index 222d358224..e1a1ade057 100644 --- a/sysdeps/generic/memcpy.c +++ b/sysdeps/generic/memcpy.c @@ -21,6 +21,7 @@ Cambridge, MA 02139, USA. */ #include <ansidecl.h> #include <string.h> #include <memcopy.h> +#include <pagecopy.h> PTR DEFUN(memcpy, (dstpp, srcpp, len), @@ -38,10 +39,14 @@ DEFUN(memcpy, (dstpp, srcpp, len), len -= (-dstp) % OPSIZ; BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ); - /* Copy from SRCP to DSTP taking advantage of the known - alignment of DSTP. Number of bytes remaining is put - in the third argumnet, i.e. in LEN. This number may - vary from machine to machine. */ + /* 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); |