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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-04-18 15:29:21 +0200 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2016-04-19 16:36:51 +0200 |
| commit | 76a2110b473c12eb7a9c9e5d15d54309db5f8b9c (patch) | |
| tree | bb66d54e37b313f2928f72e739abb25586f50532 /newlib/libc/include/machine/endian.h | |
| parent | 7a5b4524431110fde4e9336f64ade73ab2c26b6b (diff) | |
| download | cygnal-76a2110b473c12eb7a9c9e5d15d54309db5f8b9c.tar.gz cygnal-76a2110b473c12eb7a9c9e5d15d54309db5f8b9c.tar.bz2 cygnal-76a2110b473c12eb7a9c9e5d15d54309db5f8b9c.zip | |
BSD compatibility for <machine/endian.h>
Introduce <machine/_endian.h> to let target based customization of
<machine/endian.h> via
* _LITTLE_ENDIAN,
* _BIG_ENDIAN,
* _PDP_ENDIAN, and
* _BYTE_ORDER.
defines. Add definitions expected by FreeBSD to
<machine/endian.h> like
* _QUAD_HIGHWORD,
* _QUAD_LOWWORD,
* __bswap16(),
* __bswap32(),
* __bswap64(),
* __htonl(),
* __htons(),
* __ntohl(), and
* __ntohs().
Also, if __BSD_VISIBLE
* LITTLE_ENDIAN,
* BIG_ENDIAN,
* PDP_ENDIAN, and
* BYTE_ORDER.
Targets that define __machine_host_to_from_network_defined in
<machine/_endian.h> must provide their own implementation of
* __htonl(),
* __htons(),
* __ntohl(), and
* __ntohs(),
otherwise a default implementation is provided by <machine/endian.h>.
In case of GCC defines to builtins are used.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Diffstat (limited to 'newlib/libc/include/machine/endian.h')
| -rw-r--r-- | newlib/libc/include/machine/endian.h | 69 |
1 files changed, 59 insertions, 10 deletions
diff --git a/newlib/libc/include/machine/endian.h b/newlib/libc/include/machine/endian.h index 07ebc8f63..34a5726e6 100644 --- a/newlib/libc/include/machine/endian.h +++ b/newlib/libc/include/machine/endian.h @@ -1,20 +1,69 @@ #ifndef __MACHINE_ENDIAN_H__ +#define __MACHINE_ENDIAN_H__ -#include <sys/config.h> +#include <sys/cdefs.h> +#include <sys/_types.h> +#include <machine/_endian.h> -#ifndef BIG_ENDIAN -#define BIG_ENDIAN 4321 +#if _BYTE_ORDER == _LITTLE_ENDIAN +#define _QUAD_HIGHWORD 1 +#define _QUAD_LOWWORD 0 +#else +#define _QUAD_HIGHWORD 0 +#define _QUAD_LOWWORD 1 #endif -#ifndef LITTLE_ENDIAN -#define LITTLE_ENDIAN 1234 + +#if __BSD_VISIBLE +#define LITTLE_ENDIAN _LITTLE_ENDIAN +#define BIG_ENDIAN _BIG_ENDIAN +#define PDP_ENDIAN _PDP_ENDIAN +#define BYTE_ORDER _BYTE_ORDER #endif -#ifndef BYTE_ORDER -#if defined(__IEEE_LITTLE_ENDIAN) || defined(__IEEE_BYTES_LITTLE_ENDIAN) -#define BYTE_ORDER LITTLE_ENDIAN +#ifdef __GNUC__ +#define __bswap16(_x) __builtin_bswap16(_x) +#define __bswap32(_x) __builtin_bswap32(_x) +#define __bswap64(_x) __builtin_bswap64(_x) +#else /* __GNUC__ */ +static __inline __uint16_t +__bswap16(__uint16_t _x) +{ + + return ((__uint16_t)((_x >> 8) | ((_x << 8) & 0xff00))); +} + +static __inline __uint32_t +__bswap32(__uint32_t _x) +{ + + return ((__uint32_t)((_x >> 24) | ((_x >> 8) & 0xff00) | + ((_x << 8) & 0xff0000) | ((_x << 24) & 0xff000000))); +} + +static __inline __uint64_t +__bswap64(__uint64_t _x) +{ + + return ((__uint64_t)((_x >> 56) | ((_x >> 40) & 0xff00) | + ((_x >> 24) & 0xff0000) | ((_x >> 8) & 0xff000000) | + ((_x << 8) & ((__uint64_t)0xff << 32)) | + ((_x << 24) & ((__uint64_t)0xff << 40)) | + ((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56)))); +} +#endif /* !__GNUC__ */ + +#ifndef __machine_host_to_from_network_defined +#if _BYTE_ORDER == _LITTLE_ENDIAN +#define __htonl(_x) __bswap32(_x) +#define __htons(_x) __bswap16(_x) +#define __ntohl(_x) __bswap32(_x) +#define __ntohs(_x) __bswap16(_x) #else -#define BYTE_ORDER BIG_ENDIAN -#endif +#define __htonl(_x) ((__uint32_t)(_x)) +#define __htons(_x) ((__uint16_t)(_x)) +#define __ntohl(_x) ((__uint32_t)(_x)) +#define __ntohs(_x) ((__uint16_t)(_x)) #endif +#endif /* __machine_host_to_from_network_defined */ #endif /* __MACHINE_ENDIAN_H__ */ |