summaryrefslogtreecommitdiff
path: root/sysdeps/i386/memset.c
diff options
context:
space:
mode:
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