From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 sysdeps/vax/memcmp.s | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 sysdeps/vax/memcmp.s

(limited to 'sysdeps/vax/memcmp.s')

diff --git a/sysdeps/vax/memcmp.s b/sysdeps/vax/memcmp.s
new file mode 100644
index 0000000000..3854fd8e4a
--- /dev/null
+++ b/sysdeps/vax/memcmp.s
@@ -0,0 +1,61 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.asciz "@(#)memcmp.s	5.1 (Berkeley) 5/15/90"
+#endif /* LIBC_SCCS and not lint */
+
+/* int memcmp(s1, s2, n) */
+
+#include "DEFS.h"
+
+ENTRY(memcmp, 0)
+	movl	4(ap),r1	/* r1 = s1 */
+	movq	8(ap),r3	/* r3 = s2; r4 = n */
+	movzwl	$65535,r5
+0:
+	cmpl	r4,r5
+	jgtru	3f		/* handle stupid cmpc3 limitation */
+	cmpc3	r4,(r1),(r3)	/* compare */
+	beql	2f		/* done if same (r0 = 0) */
+1:
+	movzbl	(r1),r0
+	movzbl	(r3),r2
+	subl2	r2,r0		/* return *s1 - *s2; s1,s2 unsigned chars */
+2:
+	ret
+3:
+	subl2	r5,r4		/* do 64K; adjust count */
+	cmpc3	r5,(r1),(r3)
+	jeql	0b		/* loop if same */
+	jbr	1b
-- 
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