sync with NetBSD 970112 -moj

1 files changed, 70 insertions, 0 deletions

diff --git a/sys/arch/vax/boot/str.s b/sys/arch/vax/boot/str.s
new file mode 100644
index 00000000000..685574e0371
--- /dev/null
+++ b/sys/arch/vax/boot/str.s
@@ -0,0 +1,70 @@
+/*	$NetBSD: str.s,v 1.2 1996/08/02 16:18:40 ragge Exp $ */
+/*
+ * Copyright (c) 1996 Ludd, University of Lule}, Sweden.
+ * 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 at Ludd, University of 
+ *      Lule}, Sweden and its contributors.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/*
+ * Small versions of the most common string functions not using any
+ * emulated instructions.
+ */
+
+#include "../include/asm.h"
+
+ENTRY(strlen, 0);
+	movl	4(ap), r0
+1:	tstb	(r0)+
+	bneq	1b
+	decl	r0
+	subl2	4(ap), r0
+	ret
+
+ENTRY(strncmp, 0)
+	movl	12(ap), r3
+	brb	5f
+
+ENTRY(strcmp, 0)
+	movl	$250, r3	# max string len to compare
+5:	movl	4(ap), r2
+	movl	8(ap), r1
+	movl	$1, r0
+
+2:	cmpb	(r2),(r1)+
+	bneq	1f		# something differ
+	tstb	(r2)+
+	beql	4f		# continue, strings unequal
+	decl	r3		# max string len encountered?
+	bneq	2b
+
+4:	clrl	r0		# We are done, strings equal.
+	ret
+
+1:	bgtr	3f
+	mnegl	r0, r0
+3:	ret