fix: resA and resB can be > i32

[amkCha]

maxOffset can be 2³² (MXPX_THRESHOLD)
in row i + 8, when divided by 32, ie 2⁵, res can be 2²⁷
in row i + 9, previous res is squared and divided by 512, ie 2^9, so resA can be 2^45
We need to replace the definition of resA as an i64 i/o i32

For resB,
in row i + 9, previous res is squared and divided by 512, ie 2^9, so resA can be 2^45
in the case where the remainder is 0, the ceiling == the quotient, ie resB = resA so resB can also be 2^45