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#ifndef _BYTESWAP_H
#define _BYTESWAP_H
/* COM32 will be running on an i386 platform */
#include <stdint.h>
#include <klibc/compiler.h>
#define __bswap_16_macro(v) ((uint16_t) \
(((uint16_t)(v) << 8) | \
((uint16_t)(v) >> 8)))
static inline __constfunc uint16_t __bswap_16(uint16_t v)
{
return __bswap_16_macro(v);
}
#define bswap_16(x) (__builtin_constant_p(x) ? \
__bswap_16_macro(x) : __bswap_16(x))
#define __bswap_32_macro(v) ((uint32_t) \
((((uint32_t)(v) & 0x000000ff) << 24) | \
(((uint32_t)(v) & 0x0000ff00) << 8) | \
(((uint32_t)(v) & 0x00ff0000) >> 8) | \
(((uint32_t)(v) & 0xff000000) >> 24)))
static inline __constfunc uint32_t __bswap_32(uint32_t v)
{
#if __SIZEOF_POINTER__ == 4
asm("xchgb %h0,%b0 ; roll $16,%0 ; xchgb %h0,%b0"
: "+q" (v));
#elif __SIZEOF_POINTER__ == 8
asm("bswap %0"
: "=r" (v)
: "0" (v));
#else
#error "unable to build for architecture"
#endif
return v;
}
#define bswap_32(x) (__builtin_constant_p(x) ? \
__bswap_32_macro(x) : __bswap_32(x))
#define __bswap_64_macro(v) ((uint64_t) \
(((uint64_t)__bswap_32_macro((uint32_t)(v)) << 32) | \
(__bswap_32__macro((uint32_t)((uint64_t)(v) >> 32)))))
static inline __constfunc uint64_t __bswap_64(uint64_t v)
{
return ((uint64_t)__bswap_32(v) << 32) | __bswap_32(v >> 32);
}
#define bswap_64(x) (__builtin_constant_p(x) ? \
__bswap_64_macro(x) : __bswap_64(x))
#endif /* byteswap.h */
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