diff options
Diffstat (limited to 'sys/lib/libkern/arch/arm/byte_swap_4.S')
| -rw-r--r-- | sys/lib/libkern/arch/arm/byte_swap_4.S | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/sys/lib/libkern/arch/arm/byte_swap_4.S b/sys/lib/libkern/arch/arm/byte_swap_4.S new file mode 100644 index 00000000000..8ef3359f898 --- /dev/null +++ b/sys/lib/libkern/arch/arm/byte_swap_4.S @@ -0,0 +1,53 @@ +/* $NetBSD: byte_swap_4.S,v 1.1 2000/12/29 20:51:57 bjh21 Exp $ */ + +/*- + * Copyright (c) 1997 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Neil A. Carson + * + * 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 by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <machine/asm.h> + +_ENTRY(_C_LABEL(bswap32)) +_ENTRY(_C_LABEL(ntohl)) +_ENTRY(_C_LABEL(htonl)) +_PROF_PROLOGUE + eor r1, r0, r0, ror #16 + bic r1, r1, #0x00FF0000 + mov r0, r0, ror #8 + eor r0, r0, r1, lsr #8 +#ifdef __APCS_26__ + movs pc,lr +#else + mov pc, lr +#endif |