Update.
[glibc.git] / sysdeps / vax / bcopy.s
blob43bb93d216ec1cc69ce0e2f9755f3590eef56ceb
1 /*
2 * Copyright (c) 1983 Regents of the University of California.
3 * All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
34 #if defined(LIBC_SCCS) && !defined(lint)
35 .asciz "@(#)bcopy.s 5.6 (Berkeley) 6/1/90"
36 #endif /* LIBC_SCCS and not lint */
38 /* bcopy(from, to, size) */
40 #include "DEFS.h"
42 ENTRY(bcopy, R6)
43 movl 4(ap),r1
44 movl 8(ap),r3
45 movl 12(ap),r6
46 cmpl r1,r3
47 bgtr 2f # normal forward case
48 blss 3f # overlapping, must do backwards
49 ret # equal, nothing to do
51 subl2 r0,r6
52 movc3 r0,(r1),(r3)
54 movzwl $65535,r0
55 cmpl r6,r0
56 jgtr 1b
57 movc3 r6,(r1),(r3)
58 ret
60 addl2 r6,r1
61 addl2 r6,r3
62 movzwl $65535,r0
63 jbr 5f
65 subl2 r0,r6
66 subl2 r0,r1
67 subl2 r0,r3
68 movc3 r0,(r1),(r3)
69 movzwl $65535,r0
70 subl2 r0,r1
71 subl2 r0,r3
73 cmpl r6,r0
74 jgtr 4b
75 subl2 r6,r1
76 subl2 r6,r3
77 movc3 r6,(r1),(r3)
78 ret