__builtin_bswap64  128 include/uapi/linux/swab.h #define __swab64(x) (__u64)__builtin_bswap64((__u64)(x))
__builtin_bswap64   32 tools/testing/selftests/bpf/bpf_endian.h # define __bpf_be64_to_cpu(x)		__builtin_bswap64(x)
__builtin_bswap64   33 tools/testing/selftests/bpf/bpf_endian.h # define __bpf_cpu_to_be64(x)		__builtin_bswap64(x)