Doing 64 bit manipulation using 32 bit data in Fixed point arithmetic using C.
- by Viks
Hi,
I am stuck with a problem. I am working on a hardware which only does support 32 bit operations.
sizeof(int64_t) is 4. Sizeof(int) is 4.
and I am porting an application which assumes size of int64_t to be 8 bytes. The problem is it has this macro
BIG_MULL(a,b) ( (int64_t)(a) * (int64_t)(b) 23)
The result is always a 32 bit…