I'm taking an x86 assembly language programming class and know that certain instructions shouldn't be used anymore -- because they're slow on modern processors; for example, the loop instruction.
I haven't been able to find any list of instructions that are considered deprecated and should be avoided; any guidance would be appreciated.
If you what to know what to avoid, go directly to the processor manufacturers, both intel and amd have manuals for the instruction sets their processors support and to what degree they support them, your best bet if probably the optimization volumes, but if your only just starting out, take Jim's advice, get the thing working first before you worry about speed