Annotation of sys/lib/libkern/arch/mips64/htonl.S, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: htonl.S,v 1.3 2004/09/09 15:41:18 pefo Exp $ */
2: /*-
3: * Copyright (c) 1991, 1993
4: * The Regents of the University of California. All rights reserved.
5: *
6: * This code is derived from software contributed to Berkeley by
7: * Ralph Campbell.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. 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.
20: *
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.
32: */
33:
34: #include "DEFS.h"
35:
36:
37: /*
38: * netorder = htonl(hostorder)
39: * hostorder = ntohl(netorder)
40: */
41: LEAF(htonl, 0) # a0 = 0x11223344, return 0x44332211
42: ALEAF(ntohl)
43: .set noreorder
44: srl v1, a0, 24 # v1 = 0x00000011
45: sll v0, a0, 24 # v0 = 0x44000000
46: or v0, v0, v1
47: and v1, a0, 0xff00
48: sll v1, v1, 8 # v1 = 0x00330000
49: or v0, v0, v1
50: srl v1, a0, 8
51: and v1, v1, 0xff00 # v1 = 0x00002200
52: j ra
53: or v0, v0, v1
54: END(htonl)
CVSweb