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/* asm/byteorder.h
Copyright 1996, 1998, 2001 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _I386_BYTEORDER_H
#define _I386_BYTEORDER_H
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __LITTLE_ENDIAN
#define __LITTLE_ENDIAN 1234
#endif
#ifndef __LITTLE_ENDIAN_BITFIELD
#define __LITTLE_ENDIAN_BITFIELD
#endif
extern uint32_t ntohl(uint32_t);
extern uint16_t ntohs(uint16_t);
extern uint32_t htonl(uint32_t);
extern uint16_t htons(uint16_t);
extern __inline__ uint32_t __ntohl(uint32_t);
extern __inline__ uint16_t __ntohs(uint16_t);
extern __inline__ uint32_t __constant_ntohl(uint32_t);
extern __inline__ uint16_t __constant_ntohs(uint16_t);
extern __inline__ uint32_t
__ntohl(uint32_t x)
{
__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
"rorl $16,%0\n\t" /* swap words */
"xchgb %b0,%h0" /* swap higher bytes */
:"=q" (x)
: "0" (x));
return x;
}
#define __constant_ntohl(x) \
((uint32_t)((((uint32_t)(x) & 0x000000ffU) << 24) | \
(((uint32_t)(x) & 0x0000ff00U) << 8) | \
(((uint32_t)(x) & 0x00ff0000U) >> 8) | \
(((uint32_t)(x) & 0xff000000U) >> 24)))
extern __inline__ uint16_t
__ntohs(uint16_t x)
{
__asm__("xchgb %b0,%h0" /* swap bytes */
: "=q" (x)
: "0" (x));
return x;
}
#define __constant_ntohs(x) \
((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \
(((uint16_t)(x) & 0xff00) >> 8))) \
#define __htonl(x) __ntohl(x)
#define __htons(x) __ntohs(x)
#define __constant_htonl(x) __constant_ntohl(x)
#define __constant_htons(x) __constant_ntohs(x)
#if defined (__OPTIMIZE__) && !defined (__NO_INLINE__)
# define ntohl(x) \
(__builtin_constant_p((long)(x)) ? \
__constant_ntohl((x)) : \
__ntohl((x)))
# define ntohs(x) \
(__builtin_constant_p((short)(x)) ? \
__constant_ntohs((x)) : \
__ntohs((x)))
# define htonl(x) \
(__builtin_constant_p((long)(x)) ? \
__constant_htonl((x)) : \
__htonl((x)))
# define htons(x) \
(__builtin_constant_p((short)(x)) ? \
__constant_htons((x)) : \
__htons((x)))
#endif
#ifdef __cplusplus
}
#endif
#endif
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