tools/testing/selftests/bpf/bpf_endian.h

   1 #ifndef __BPF_ENDIAN__
   2 #define __BPF_ENDIAN__
   3
   4 #include <asm/byteorder.h>
   5
   6 #if __BYTE_ORDER == __LITTLE_ENDIAN
   7 # define __bpf_ntohs(x)         __builtin_bswap16(x)
   8 # define __bpf_htons(x)         __builtin_bswap16(x)
   9 #elif __BYTE_ORDER == __BIG_ENDIAN
  10 # define __bpf_ntohs(x)         (x)
  11 # define __bpf_htons(x)         (x)
  12 #else
  13 # error "Fix your __BYTE_ORDER?!"
  14 #endif
  15
  16 #define bpf_htons(x)                            \
  17         (__builtin_constant_p(x) ?              \
  18          __constant_htons(x) : __bpf_htons(x))
  19 #define bpf_ntohs(x)                            \
  20         (__builtin_constant_p(x) ?              \
  21          __constant_ntohs(x) : __bpf_ntohs(x))
  22
  23 #endif