do_R4              80 ext/digest/sha1/sha1.c void do_R4(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *);
do_R4             162 ext/digest/sha1/sha1.c     do_R4(&a, &b, &c, &d, &e, block);