64 static uint64_t load_4(const uint8_t *in) {  in load_4()  function
721   int64_t s1 = 2097151 & (load_4(s + 2) >> 5);  in x25519_sc_reduce()
723   int64_t s3 = 2097151 & (load_4(s + 7) >> 7);  in x25519_sc_reduce()
724   int64_t s4 = 2097151 & (load_4(s + 10) >> 4);  in x25519_sc_reduce()
726   int64_t s6 = 2097151 & (load_4(s + 15) >> 6);  in x25519_sc_reduce()
729   int64_t s9 = 2097151 & (load_4(s + 23) >> 5);  in x25519_sc_reduce()
731   int64_t s11 = 2097151 & (load_4(s + 28) >> 7);  in x25519_sc_reduce()
732   int64_t s12 = 2097151 & (load_4(s + 31) >> 4);  in x25519_sc_reduce()
734   int64_t s14 = 2097151 & (load_4(s + 36) >> 6);  in x25519_sc_reduce()
737   int64_t s17 = 2097151 & (load_4(s + 44) >> 5);  in x25519_sc_reduce()
739   int64_t s19 = 2097151 & (load_4(s + 49) >> 7);  in x25519_sc_reduce()
740   int64_t s20 = 2097151 & (load_4(s + 52) >> 4);  in x25519_sc_reduce()
742   int64_t s22 = 2097151 & (load_4(s + 57) >> 6);  in x25519_sc_reduce()
743   int64_t s23 = (load_4(s + 60) >> 3);  in x25519_sc_reduce()