Viewing profile — clausecker

Go had panic/recover right from the get go. Nobody “caved.” And indeed, you are free to use panic/recover for error handling in your code. That was always allowed. That said, the k…

Really bad idea. Silently returning some (the wrong) value is always worse than catching the error right then and their and panicking. A panic is a noticeable symptom of something …

> No it really doesn't. It litters your code with if statements that are all just about the same, except that one that needs to be different, and you go blind looking at them all a…

You can find the first set bit in an integer with a machine instruction, it's completely branch free. gcc has __builtin_ctz() for this. You'll either need to iterate over all set b…

So I've thought about it and I don't really feel like spending more time to convince you that this works. If you have questions I am happy to answer them, but please write your own…

This does track the state. If you want to track it across multple vectors of input, you'll need to carry it over manually.

You can do it like this, assuming A is the mask of newlines and B is the mask of non-spaces. 1. Compute M1 = ~A & ~B, which is the mask of all spaces that are not newlines 2. Compu…

We do this with FreeBSD ports, but users don't have to clone the ports tree unless they want to modify ports or compile them with custom options.

And the same reason NVRAM was dead on arrival. No affordable dev systems meant that only enterprise software supported it.

That's more "load store architecture" than RISC. And by that measure, S/360 could be considered a RISC.

You may enjoy the RISC deprogrammer: https://blog.erratasec.com/2022/10/the-risc-deprogrammer.htm...

FreeBSD

ARM already has most stuff required for this on board. Two proprietary extensions are used by Rosetta: one emulates the parity (rarely used) and half-carry (obsolete) flags, which …

It's very likely that there is some serious autovectorisation going on behind the scenes.

Best one was when gedit had the option to syntax highlight for a language named “Los.”

Had the same feeling browsing through the Haskell package collection. Felt like and almagamation of PhD theses, none of which were maintained after the author got his degree. Every…

Such as?

I'm talking about how they are able to integrate stuff that normally wouldn't fit into 32 bits (such as 3 operand simd with masking), not about getting the instruction set more com…

Also, the VAX instruction encoding is a class of horror above that of x86.

ARM64 has a trick up its sleeve: many instructions that would be longer on other architecturea are instead split into easily recognisable pairs on ARM64. This allows for simple inp…

LL/SC is performant, it just doesn't scale to high core counts. The VEX encoding is actually only rarely longer than the legacy one, and frequently it is shorter.

When I implemented SIMD-accelerated string functions for FreeBSD's libc, I briefly looked at Stringzilla, but the code didn't look particularly interesting or fast. So no surprise …

If you give in to an unreasonable person's demands, that person will demand more and more until it all comes crashing down.