b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
88 lines
2.9 KiB
ArmAsm
88 lines
2.9 KiB
ArmAsm
/* $NetBSD: byte_swap_4.S,v 1.3 2009/12/14 00:39:00 matt Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Ralph Campbell.
|
|
*
|
|
* 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. 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.
|
|
*/
|
|
|
|
#include <mips/asm.h>
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
RCSID("from: @(#)htonl.s 8.1 (Berkeley) 6/4/93")
|
|
#else
|
|
RCSID("$NetBSD: byte_swap_4.S,v 1.3 2009/12/14 00:39:00 matt Exp $")
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#undef _LOCORE
|
|
#define _LOCORE /* XXX not really, just assembly-code source */
|
|
#include <machine/endian.h>
|
|
|
|
#if defined(_KERNEL) || defined(_STANDALONE)
|
|
#define BSWAP32_NAME bswap32
|
|
#else
|
|
#define BSWAP32_NAME __bswap32
|
|
#endif
|
|
|
|
NLEAF(BSWAP32_NAME) # a0 = 0x11223344, return 0x44332211
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
ALEAF(htonl) # a0 = 0x11223344, return 0x44332211
|
|
ALEAF(ntohl)
|
|
#endif
|
|
#if (__mips == 32 || __mips == 64) && __mips_isa_rev == 2
|
|
/*
|
|
* If we are on MIPS32R2 or MIPS64R2 it's much easier
|
|
*/
|
|
wsbh a0, a0 # word swap bytes within halfwords
|
|
rotr v0, a0, 16 # rotate word 16bits
|
|
j ra
|
|
#else
|
|
srl v1, a0, 24 # v1 = 0x00000011
|
|
sll v0, a0, 24 # v0 = 0x44000000
|
|
or v0, v0, v1
|
|
and v1, a0, 0xff00
|
|
sll v1, v1, 8 # v1 = 0x00330000
|
|
or v0, v0, v1
|
|
srl v1, a0, 8
|
|
and v1, v1, 0xff00 # v1 = 0x00002200
|
|
or v0, v0, v1
|
|
j ra
|
|
#endif
|
|
END(BSWAP32_NAME)
|
|
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
NLEAF(htonl) # a0 = 0x11223344, return 0x44332211
|
|
ALEAF(ntohl)
|
|
move v0, a0
|
|
j ra
|
|
END(htonl)
|
|
#endif
|