CODEWITHSUNDEEP
c++
Yazan Houshieh
Yazan Houshieh

Reputation: 113

New Float number

i want to make a new float type with a size of 128-bit , the exponent would have 4-bytes(32-bit) and the fraction would have 12-bytes(96-bit), how i can make this type in c++, where i will be able to do input, output ,+,-,*,/ operations.

[I am thinking of c++ class but i can't figure how i will mange up between exponent and fraction with the specified length]

I have tried "bitset" std class, but it has a huge size in comparison with what i need for example "std::bitset<16> foo;" give a size of 8-bytes.

Any Suggestions !

Upvotes: 0

Views: 406

Answers (1)

Pandrei
Pandrei

Reputation: 4951

You have to build your own data type and implement all the operations you want to do with it. This is exactly how a compiler emulates a 64 bit dataset when the architecture supports only 32 bit data native.

So a class/struct with two members is the right starting point. You have to implement the basic operations now: +,-,*,/. Add and sub are easy, you need to pay more attention to * and /. What I can tell you is that usually compiles implement these using repeated add and sub operations.

Upvotes: 1

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