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NetBSD/sys/lib/libkern/arch/alpha/byte_swap_2.S

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Sync with libc.
1999-01-22 14:01:32 +03:00
/* $NetBSD: byte_swap_2.S,v 1.4 1999/01/22 11:01:32 mycroft Exp $ */
files copied from libc
1996-04-18 02:46:34 +04:00
/*
* Copyright (c) 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
copy down changes from libc
1996-10-17 08:26:20 +04:00
#include <machine/asm.h>
files copied from libc
1996-04-18 02:46:34 +04:00
/*
* Byte-swap a 2-byte quantity. (Convert 0x0123 to 0x2301.)
*
* Argument is an unsigned 2-byte integer (u_int16_t).
*/
Move the bswap functions from libutil to libc (this bups the minor of libc and the major of libutil). For little-endian architectures merge the bnswap() assembly versions with nto* and hton* using symbols aliasing. Use symbol renaming for the bswap function in this case to avoid namespace pollution. Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian machines, common code for inline macros go in machine/byte_swap.h Sync libkern with libc. Adjust #include in kernel sources for machine/bswap.h.
1999-01-15 16:31:15 +03:00
LEAF(bswap16, 1) /* a0 contains 0x0123 */
XLEAF(htons, 1)
XLEAF(ntohs, 1)
Sync with libc.
1999-01-22 14:01:32 +03:00
insbl a0, 1, t0 /* t0 = 0x23 */
files copied from libc
1996-04-18 02:46:34 +04:00
extbl a0, 1, t1 /* t1 = 0x 01 */
or t0, t1, v0 /* v0 = 0x2301 */
RET
Move the bswap functions from libutil to libc (this bups the minor of libc and the major of libutil). For little-endian architectures merge the bnswap() assembly versions with nto* and hton* using symbols aliasing. Use symbol renaming for the bswap function in this case to avoid namespace pollution. Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian machines, common code for inline macros go in machine/byte_swap.h Sync libkern with libc. Adjust #include in kernel sources for machine/bswap.h.
1999-01-15 16:31:15 +03:00
END(bswap16)