3 ms·

Well, yes. That part sucks. But on x86, everything is like that. I'd rather have one weird, inconsistant thing than an amorphous, ever-shifting mass of them. Wh

Well, yes. That part sucks. But on x86, everything is like that. I'd rather have one weird, inconsistant thing than an amorphous, ever-shifting mass of them. Which is x86 in a nutshell. Here's a handy heuristic: if somebody claims to know every x86-64 instruction (or even every x86-32 instruction), you can be at least 90% sure they're lying.

lgeek 10y ago
> Here's a handy heuristic: if somebody claims to know every x86-64 instruction (or even every x86-32 instruction), you can be at least 90% sure they're lying. I very much prefer ARM myself, but you can probably apply the same rule of thumb to it. There are upwards of 400 instructions both in AArch32 and AArch64, with a fair number of differences between the two. Edit: I've also posted a breakdown of the immediate limitations for ARM in this thread. It's not that complicated when sticking to the standard instructions.
- qwertyuiop924 10y ago
  ...But how many of those instructions are just variants of other instructions, but with a different addressing mode?
  - lgeek 10y ago
    Fair enough, some instructions have many variants. But I work with ARM assembly almost daily and I still wouldn't remember that, for example, 'VQRDMULH' is a real instruction and it stands for 'Vector Saturating Rounding Doubling Multiply Returning High Half'.
    - qwertyuiop924 10y ago
      Ah, yes. A fun one. Those exist in x86, too. I should probably count up x86 against ARM, so I have more than guesses to go on here. Maybe that part of x86 actually better.
      - wolfgke 10y ago
        > I should probably count up x86 against ARM It is not easy to tell how many instruction there actually are on x86: > https://fgiesen.wordpress.com/2016/08/25/how-many-x86-instructions-are-there/ https://fgiesen.wordpress.com/2016/08/25/how-many-x86-instru...

3 ms·

Well, yes. That part sucks. But on x86, everything is like that. I'd rather have one weird, inconsistant thing than an amorphous, ever-shifting mass of them. Wh

by qwertyuiop924 10y ago

lgeek 10y ago
> Here's a handy heuristic: if somebody claims to know every x86-64 instruction (or even every x86-32 instruction), you can be at least 90% sure they're lying. I very much prefer ARM myself, but you can probably apply the same rule of thumb to it. There are upwards of 400 instructions both in AArch32 and AArch64, with a fair number of differences between the two. Edit: I've also posted a breakdown of the immediate limitations for ARM in this thread. It's not that complicated when sticking to the standard instructions.
- qwertyuiop924 10y ago
  ...But how many of those instructions are just variants of other instructions, but with a different addressing mode?
  - lgeek 10y ago
    Fair enough, some instructions have many variants. But I work with ARM assembly almost daily and I still wouldn't remember that, for example, 'VQRDMULH' is a real instruction and it stands for 'Vector Saturating Rounding Doubling Multiply Returning High Half'.
    - qwertyuiop924 10y ago
      Ah, yes. A fun one. Those exist in x86, too. I should probably count up x86 against ARM, so I have more than guesses to go on here. Maybe that part of x86 actually better.
      - wolfgke 10y ago
        > I should probably count up x86 against ARM It is not easy to tell how many instruction there actually are on x86: > https://fgiesen.wordpress.com/2016/08/25/how-many-x86-instructions-are-there/ https://fgiesen.wordpress.com/2016/08/25/how-many-x86-instru...