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authorH.J. Lu <hjl.tools@gmail.com>2015-08-27 09:04:40 -0700
committerH.J. Lu <hjl.tools@gmail.com>2015-08-27 09:04:54 -0700
commitd226114b9bfce2ea729f9c7b736aa5d509b2a73c (patch)
tree4076d4d6c1c6c3e112d417f85b036d10ceb79480 /sysdeps/i386/memset.c
parent37430363b865f2423bd58b4f0eaa779845ed7e71 (diff)
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Add i386 memset and memcpy assembly functions
Add i386 memset and memcpy assembly functions with REP MOVSB/STOSB
instructions.

	* sysdeps/i386/bcopy.S: New file.
	* sysdeps/i386/bzero.S: Likewise.
	* sysdeps/i386/memcpy.S: Likewise.
	* sysdeps/i386/memmove.S: Likewise.
	* sysdeps/i386/mempcpy.S: Likewise.
	* sysdeps/i386/memset.S: Likewise.
	* sysdeps/i386/bzero.c: Removed.
	* sysdeps/i386/memset.c: Likewise.
	* sysdeps/i386/i586/memcpy_chk.S: Likewise.
	* sysdeps/i386/i586/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i586/memset_chk.S: Likewise.
	* sysdeps/i386/i686/memcpy_chk.S: Moved to ...
	* sysdeps/i386/memcpy_chk.S: Here.
	* sysdeps/i386/i686/memmove_chk.S: Moved to ...
	* sysdeps/i386/memmove_chk.S: Here.
	* sysdeps/i386/i686/mempcpy_chk.S: Moved to ...
	* sysdeps/i386/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i686/memset_chk.S: Moved to ...
	* sysdeps/i386/memset_chk.S: Likewise.
Diffstat (limited to 'sysdeps/i386/memset.c')
-rw-r--r--sysdeps/i386/memset.c85
1 files changed, 0 insertions, 85 deletions
diff --git a/sysdeps/i386/memset.c b/sysdeps/i386/memset.c
deleted file mode 100644
index bf11590460..0000000000
--- a/sysdeps/i386/memset.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/* Set a block of memory to some byte value.
-   For Intel 80x86, x>=3.
-   Copyright (C) 1991-2015 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Torbjorn Granlund (tege@sics.se).
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <string.h>
-#include <memcopy.h>
-
-#ifdef	__GNUC__
-
-#undef memset
-
-void *
-memset (void *dstpp, int c, size_t len)
-{
-  int d0;
-  unsigned long int dstp = (unsigned long int) dstpp;
-
-  /* This explicit register allocation
-     improves code very much indeed.  */
-  register op_t x asm("ax");
-
-  x = (unsigned char) c;
-
-  /* Clear the direction flag, so filling will move forward.  */
-  asm volatile("cld");
-
-  /* This threshold value is optimal.  */
-  if (len >= 12)
-    {
-      /* Fill X with four copies of the char we want to fill with.  */
-      x |= (x << 8);
-      x |= (x << 16);
-
-      /* Adjust LEN for the bytes handled in the first loop.  */
-      len -= (-dstp) % OPSIZ;
-
-      /* There are at least some bytes to set.
-	 No need to test for LEN == 0 in this alignment loop.  */
-
-      /* Fill bytes until DSTP is aligned on a longword boundary.  */
-      asm volatile("rep\n"
-		   "stosb" /* %0, %2, %3 */ :
-		   "=D" (dstp), "=c" (d0) :
-		   "0" (dstp), "1" ((-dstp) % OPSIZ), "a" (x) :
-		   "memory");
-
-      /* Fill longwords.  */
-      asm volatile("rep\n"
-		   "stosl" /* %0, %2, %3 */ :
-		   "=D" (dstp), "=c" (d0) :
-		   "0" (dstp), "1" (len / OPSIZ), "a" (x) :
-		   "memory");
-      len %= OPSIZ;
-    }
-
-  /* Write the last few bytes.  */
-  asm volatile("rep\n"
-	       "stosb" /* %0, %2, %3 */ :
-	       "=D" (dstp), "=c" (d0) :
-	       "0" (dstp), "1" (len), "a" (x) :
-	       "memory");
-
-  return dstpp;
-}
-libc_hidden_builtin_def (memset)
-
-#else
-#include <string/memset.c>
-#endif