CODEWITHSUNDEEP
assemblyavrbigint8-bit
Kevin Paulo
Kevin Paulo

Reputation: 1

How do I get the most significant part of a number?

For example, if I have the number #1020h represented in hexadecimal, the most significant part is the 10 and the least is the 20. Is there an easy way of doing this? I'm using a 8 bit risc assembly simulator

Edit: I was told I had to use the JC conditional

Upvotes: 0

Views: 119

Answers (1)

Peter Cordes
Peter Cordes

Reputation: 365237

In an 8-bit system (like 8-bit RISC AVR for example) a 16-bit number is already stored as 2 separate bytes. You don't have to do anything special; it's already in separate registers so you literally already have the 0x10 high byte isolated in a register with zero instructions.

Or you already need to deal with its storage in memory as 2 separate bytes, e.g. using 2 separate load instructions.

Also, if you need to branch then there's some other part of the problem you aren't mentioning, like maybe adding two other numbers to get this 16-bit number.

Upvotes: 1

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