Re: [PATCH] abuse of macros in swab.h

[Giuliano Pochini]

> +static inline __u64 ___swab16(__u64 x)
> +{
> +     return  (__u64)((x & (__u64)0x00000000000000ffULL) << 56) |
> +             (__u64)((x & (__u64)0x000000000000ff00ULL) << 40) |
> +             (__u64)((x & (__u64)0x0000000000ff0000ULL) << 24) |
> +             (__u64)((x & (__u64)0x00000000ff000000ULL) <<  8) |
> +             (__u64)((x & (__u64)0x000000ff00000000ULL) >>  8) |
> +             (__u64)((x & (__u64)0x0000ff0000000000ULL) >> 24) |
> +             (__u64)((x & (__u64)0x00ff000000000000ULL) >> 40) |
> +             (__u64)((x & (__u64)0xff00000000000000ULL) >> 56);
> +}


And something like this ?

static inline __u64 ___swab16(__u64 x){
__u64 n;
  n = (x>>32) | (x<<32);
  n = ((n & 0x0000ffff0000ffffLL)<<16) | (n & 0xffff0000ffff0000LL)>>16;
  n = ((n & 0x00ff00ff00ff00ffLL)<<8)  | (n & 0xff00ff00ff00ff00LL)>>8;
  return(n);
}



Bye.

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