1 files changed, 70 insertions, 0 deletions

diff --git a/arch/blackfin/lib/memchr.S b/arch/blackfin/lib/memchr.S
new file mode 100644
index 000000000000..498122250d07
--- /dev/null
+++ b/arch/blackfin/lib/memchr.S
@@ -0,0 +1,70 @@
+/*
+ * File:         arch/blackfin/lib/memchr.S
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/linkage.h>
+
+/* void *memchr(const void *s, int c, size_t n);
+ * R0 = address (s)
+ * R1 = sought byte (c)
+ * R2 = count (n)
+ *
+ * Returns pointer to located character.
+ */
+
+.text
+
+.align 2
+
+ENTRY(_memchr)
+        P0 = R0;                /* P0 = address */
+        P2 = R2;                /* P2 = count */
+        R1 = R1.B(Z);
+        CC = R2 == 0;
+        IF CC JUMP .Lfailed;
+
+.Lbytes:
+        LSETUP (.Lbyte_loop_s, .Lbyte_loop_e) LC0=P2;
+
+.Lbyte_loop_s:
+        R3 = B[P0++](Z);
+        CC = R3 == R1;
+        IF CC JUMP .Lfound;
+.Lbyte_loop_e:
+        NOP;
+
+.Lfailed:
+        R0=0;
+        RTS;
+
+.Lfound:
+        R0 = P0;
+        R0 += -1;
+        RTS;
+
+.size _memchr,.-_memchr