Official documents only mention two functions:
long dmuls_h(long data1,long data2) and long dmuls_l(long data1,long data2)
so can I use long long? or __int64?
__int64 is not defined in the SDK. Instead, use long long.
If you're using the PrizmSDK for the Casio Prizm, then you can perform arbitrary operations on 64-bit numbers just as if they were native. For example:
Code: long long int a = 9000000001;
long long unsigned int b = 12345678934544;
a *= b;
b += a;
sprintf(somestring,"%llu",b);
No, long long can't be used in 9860 SDK... Any other ideas?
I found something like this
Quote:
> Prior to C99, there was a DR that stated that no standard integer type
> could be "longer" than long, i.e., size_t, ptrdiff_t, and so on. But
> a "long long" type in a pre-C99 compiler would be an extension, not a
> standard type, and the only limitation placed on extensions is the one
> above.
ANd in limits.h, there aren't any indics from any long long, long int or else extended type.
It would seem then that you'd want to write some 64-bit routines based around structs of two 32-bit integers. I've even seen libraries of routines that will do arithmetic operations such as addition, subtraction, division, multiplication, and comparison on such structs, so you might not have to do much work for it.
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