From 4fcc031a7085a47b9a027a20a919574f8aab0768 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Tue, 30 May 2006 09:13:53 +0000
Subject: import some optimized functions from blackfin cvs

---
 libc/string/bfin/memchr.S | 54 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 libc/string/bfin/memchr.S

(limited to 'libc/string/bfin/memchr.S')

diff --git a/libc/string/bfin/memchr.S b/libc/string/bfin/memchr.S
new file mode 100644
index 000000000..6ecaf37a1
--- /dev/null
+++ b/libc/string/bfin/memchr.S
@@ -0,0 +1,54 @@
+/* memchr.S
+ * Copyright (C) 2003, 2005, 2006 Analog Devices Inc., All Rights Reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU Library General
+ * Public License. See the file "COPYING.LIB" in the main directory of this
+ * archive for more details.
+ *
+ * Non-LGPL License also available as part of VisualDSP++
+ * http://www.analog.com/processors/resources/crosscore/visualDspDevSoftware.html
+ */
+
+/* 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
+
+.global _memchr
+.type _memchr, STT_FUNC
+_memchr:
+	P0 = R0;             // P0 = address
+	P2 = R2;             // P2 = count
+	R1 = R1.B(Z);
+	CC = R2 == 0;
+	IF CC JUMP failed;
+
+bytes:
+	LSETUP (byte_loop_s , byte_loop_e) LC0=P2;
+
+byte_loop_s:
+	R3 = B[P0++](Z);
+	CC = R3 == R1;
+	IF CC JUMP found;
+	NOP;
+byte_loop_e:
+
+failed:
+	R0=0;
+	RTS;
+
+found:
+	R0 = P0;
+	R0 += -1;
+	RTS;
+
+.size _memchr,.-_memchr
+
+libc_hidden_def (memchr)
-- 
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