S32                64 srclib/apr-util/crypto/apr_md4.c #define S32 9
S32                91 srclib/apr-util/crypto/apr_md5.c #define S32 11
S32               128 srclib/apr/random/unix/sha2.c #define S32(b,x)        (((x) >> (b)) | ((x) << (32 - (b))))