initial import

1 files changed, 81 insertions, 0 deletions

diff --git a/sysdeps/generic/bzero.c b/sysdeps/generic/bzero.c
new file mode 100644
index 0000000000..7ebdcfe7e3
--- /dev/null
+++ b/sysdeps/generic/bzero.c
@@ -0,0 +1,81 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+   Contributed by Torbjorn Granlund (tege@sics.se).
+   
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <string.h>
+#include <memcopy.h>
+
+/* Set N bytes of S to 0.  */
+void
+DEFUN(bzero, (s, n), PTR s AND size_t len)
+{
+  long int dstp = (long int) s;
+  CONST op_t zero = 0;
+
+  if (len >= 8)
+    {
+      size_t xlen;
+
+      /* There are at least some bytes to zero.  No need to test
+	 for LEN == 0 in this alignment loop.  */
+      while (dstp % OPSIZ != 0)
+	{
+	  ((byte *) dstp)[0] = 0;
+	  dstp += 1;
+	  len -= 1;
+	}
+
+      /* Write 8 op_t per iteration until less than 8 op_t remain.  */
+      xlen = len / (OPSIZ * 8);
+      while (xlen != 0)
+	{
+	  ((op_t *) dstp)[0] = zero;
+	  ((op_t *) dstp)[1] = zero;
+	  ((op_t *) dstp)[2] = zero;
+	  ((op_t *) dstp)[3] = zero;
+	  ((op_t *) dstp)[4] = zero;
+	  ((op_t *) dstp)[5] = zero;
+	  ((op_t *) dstp)[6] = zero;
+	  ((op_t *) dstp)[7] = zero;
+	  dstp += 8 * OPSIZ;
+	  xlen -= 1;
+	}
+      len %= OPSIZ * 8;
+
+      /* Write 1 op_t per iteration until less than op_t remain.  */
+      xlen = len / OPSIZ;
+      while (xlen != 0)
+	{
+	  ((op_t *) dstp)[0] = zero;
+	  dstp += OPSIZ;
+	  xlen -= 1;
+	}
+      len %= OPSIZ;
+    }
+
+  /* Write the last few bytes.  */
+  while (len != 0)
+    {
+      ((byte *) dstp)[0] = 0;
+      dstp += 1;
+      len -= 1;
+    }
+}
+