Description:
- Abstract interface between hardware and the lowest level software
- User portion of the instruction set plus the operating system interfaces used by application programmers
- Translate Assembly Language to binary
- Each assembly language is for 1 micro-processor
Basic processor:
- One instruction at a time:
Instruction types:
- Every architecture has their own instructions but generally follow a few categories:
- Arithmetic: add, subtract, shift left, shift right, multiply, divide,…
- Memory: load, store from to register and memory
- Control flow: conditional jump (branches), jump and link (subroutine call)
- Others: vector add/sub/mul/div, string ops, IO,…
Architecture includes:
Operands:
- Can be from:
- Register
- Memory
- Immediate (constant)
