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by rep_lodsb
739 days ago
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It's easy enough to learn "base + index*scale +- displacement". And it can be written in exactly that way, in whatever order makes the meaning of the code clearest, as you would do it in a higher level language. AT&T syntax forces you to learn this before writing or even reading a single line of code that references memory, instead of giving the illusion that maybe something like [eax+ebx+ecx] or [[eax]] was also allowed. I don't think that's very helpful. It also forces you to learn a very specific way of writing it that is completely unintuitive. I'm somewhat sympathetic to the argument that assembly syntax should correspond to the underlying hardware, just not to such an extreme. For example, I prefer 8080 over Z80 for that reason (one mnemonic for each addressing mode). |
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Well, you already know this requirement, so it is not a problem for you. However for learners, who don't have even the remotest idea of machine instructions, all they get is some invalid expression error messages. Same message for all (1) (2) and (3) cases I listed above.
Maybe Intel syntax works better for experienced programmers. But at least for me, when I was a newbie to assembly, AT&T was better than Intel syntax. It made learning process easier.
> AT&T syntax forces you to learn this before writing or even reading a single line of code that references memory
I do believe that rules forced by language is a good thing. At least it helped me understand why (1) (2) and (3) didn't work
Many people believe Rust can help people write safer code. Why? Because of its rules. Incorrect ownership will be discovered by the borrow checker so a compilation error will force the programmer to correct it.
Maybe an experienced C++ programmer will be able to handle memory management correctly in C++, and loves the extra freedom that C++ brings. But Rust can be helpful for learners. It provides clear error message helping them understand why their code is wrong. While in C++? Segmentation fault.
(Needless to say, Rust also helps experienced programmers. Even experienced programmers write buggy C++ code.)