View source for Instructions (Computer Science)

A computer needs 1 instruction to run (OISC with subleq). It's possible but not fun.

Each instruction is of a fix size. In [[FISC]], for example, each instruction is 2 bytes. Arguments on this instruction does not need to conform to a certain order (such as that dictated by the assembly language).

= Operators =
The [[Add]] operator is very important. It is the fundamental building block of arithmetic operations such as subtract, multiply, divide, and modulo.

= Suboperator =
Some instructions have ''free bits'' in the instruction due to the fixed size. In this case, the free bits may be used as '''suboperators.''' This requires additional circuit on the [[ALU]].

In [[FISC]], for example, the ''not'' instruction only specify two registers (unlike the usual 3), so 2 bits are left free.

[[Category:Computer Architecture]]