[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/sysdeps/i386/bzero.c b/ap/libc/glibc/glibc-2.22/sysdeps/i386/bzero.c
new file mode 100644
index 0000000..1a89444
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/sysdeps/i386/bzero.c
@@ -0,0 +1,82 @@
+/* bzero -- set a block of memory to zero. For Intel 80x86, x>=3.
+ This file is part of the GNU C Library.
+ Copyright (C) 1991-2015 Free Software Foundation, Inc.
+ 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>
+
+#undef bzero
+#undef __bzero
+
+#ifdef __GNUC__
+
+void
+__bzero (dstpp, len)
+ void *dstpp;
+ size_t len;
+{
+ /* N.B.: This code is almost verbatim from memset.c. */
+ 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 = 0;
+
+ /* Clear the direction flag, so filling will move forward. */
+ asm volatile ("cld");
+
+ /* This threshold value is optimal. */
+ if (len >= 12)
+ {
+ /* 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), "c" (len), "a" (x) :
+ "memory");
+}
+weak_alias (__bzero, bzero)
+
+#else
+#include <string/bzero.c>
+#endif