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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _ASM_BYTEORDER_H
#define _ASM_BYTEORDER_H
#include <sys/ccompile.h>
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(__lint) && defined(__GNUC__)
/*
* htonll(), ntohll(), htonl(), ntohl(), htons(), ntohs()
* These functions reverse the byte order of the input parameter and returns
* the result. This is to convert the byte order from host byte order
* (little endian) to network byte order (big endian), or vice versa.
*/
#if defined(__i386) || defined(__amd64)
extern __GNU_INLINE uint16_t
htons(uint16_t value)
{
#if defined(__amd64)
__asm__("xchgb %h0, %b0" : "+Q" (value));
#elif defined(__i386)
__asm__("xchgb %h0, %b0" : "+q" (value));
#endif
return (value);
}
extern __GNU_INLINE uint16_t
ntohs(uint16_t value)
{
#if defined(__amd64)
__asm__("xchgb %h0, %b0" : "+Q" (value));
#elif defined(__i386)
__asm__("xchgb %h0, %b0" : "+q" (value));
#endif
return (value);
}
extern __GNU_INLINE uint32_t
htonl(uint32_t value)
{
__asm__("bswap %0" : "+r" (value));
return (value);
}
extern __GNU_INLINE uint32_t
ntohl(uint32_t value)
{
__asm__("bswap %0" : "+r" (value));
return (value);
}
#if defined(__amd64)
extern __GNU_INLINE uint64_t
htonll(uint64_t value)
{
__asm__("bswapq %0" : "+r" (value));
return (value);
}
extern __GNU_INLINE uint64_t
ntohll(uint64_t value)
{
__asm__("bswapq %0" : "+r" (value));
return (value);
}
#elif defined(__i386)
/* Use the htonl() and ntohl() inline functions defined above */
extern __GNU_INLINE uint64_t
htonll(uint64_t value)
{
return (htonl(value >> 32) | ((uint64_t)htonl(value) << 32));
}
extern __GNU_INLINE uint64_t
ntohll(uint64_t value)
{
return (ntohl(value >> 32) | (uint64_t)ntohl(value) << 32);
}
#endif /* __amd64 */
#endif /* __i386 || __amd64 */
#endif /* !__lint && __GNUC__ */
#ifdef __cplusplus
}
#endif
#endif /* _ASM_BYTEORDER_H */
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