Support median block size > 4 GB

add a 128/64 division routine so we can use a > 32 bit median block size in calculations
2019-10-07 19:24:57 +00:00
parent b60cf6a938
commit be82c40703
6 changed files with 174 additions and 14 deletions
@@ -129,6 +129,9 @@ static inline uint32_t div128_32(uint64_t dividend_hi, uint64_t dividend_lo, uin
  return remainder;
 }

+// Long divisor with 2^64 base
+void div128_64(uint64_t dividend_hi, uint64_t dividend_lo, uint64_t divisor, uint64_t* quotient_hi, uint64_t *quotient_lo, uint64_t *remainder_hi, uint64_t *remainder_lo);
+
 #define IDENT16(x) ((uint16_t) (x))
 #define IDENT32(x) ((uint32_t) (x))
 #define IDENT64(x) ((uint64_t) (x))