sha512_block_data_order
sha512_block_data_order (c,p,1);
sha512_block_data_order (c,p,1);
sha512_block_data_order (c,p,1);
sha512_block_data_order (c,p,1),
sha512_block_data_order (c,data,len/sizeof(c->u)),
sha512_block_data_order (c,data,1);
void sha512_block_data_order (SHA512_CTX *ctx, const void *in, size_t num);