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.
84 lines
2.7 KiB
ArmAsm
84 lines
2.7 KiB
ArmAsm
/* $NetBSD: byte_swap_2.S,v 1.3 2009/12/14 00:39:00 matt Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <mips/asm.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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RCSID("from: @(#)htons.s 8.1 (Berkeley) 6/4/93")
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#else
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RCSID("$NetBSD: byte_swap_2.S,v 1.3 2009/12/14 00:39:00 matt Exp $")
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#endif
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#endif /* LIBC_SCCS and not lint */
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#undef _LOCORE
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#define _LOCORE /* XXX not really, just assembly-code source */
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#include <machine/endian.h>
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#if defined(_KERNEL) || defined(_STANDALONE)
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#define BSWAP16_NAME bswap16
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#else
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#define BSWAP16_NAME __bswap16
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#endif
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NLEAF(BSWAP16_NAME)
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#if BYTE_ORDER == LITTLE_ENDIAN
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ALEAF(htons)
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ALEAF(ntohs)
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#endif
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#if (__mips == 32 || __mips == 64) && __mips_isa_rev == 2
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/*
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* If we are on MIPS32r2 or MIPS64r2, use the new instructions
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*/
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wsbh a0, a0 # word swap bytes within halfwords
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and v0, a0, 0xffff # bound it to 16bits
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j ra
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#else
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srl v0, a0, 8
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and v0, v0, 0xff
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sll v1, a0, 8
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and v1, v1, 0xff00
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or v0, v0, v1
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j ra
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#endif
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END(BSWAP16_NAME)
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#if BYTE_ORDER == BIG_ENDIAN
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NLEAF(htons)
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ALEAF(ntohs)
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move v0, a0
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j ra
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END(htons)
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#endif
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