SHR_SHA256
#define SIGMA_MIN0_SHA256(x) (ROTR_SHA256(x, 7) ^ ROTR_SHA256(x, 18) ^ SHR_SHA256(x, 3))
#define SIGMA_MIN1_SHA256(x) (ROTR_SHA256(x, 17) ^ ROTR_SHA256(x, 19) ^ SHR_SHA256(x, 10))