fixed point was a mistake

[eniko@mastodon.gamedev.place]

@midnaw not really no, they're rarely used nowadays

[eniko@mastodon.gamedev.place]

@dacmot head hurt

[dacmot@sunny.garden]

Ah. Fair.

Are you sure it's the fixed point and not the barometric pressure? 😅

@eniko

[disorderlyf@todon.eu]

@eniko oops, all ints

[eniko@mastodon.gamedev.place]

fixed point was in fact *not* a mistake

[at1st@mstdn.ca]

@eniko @midnaw As I understand, it's an iconic difference between COBOL and other languages that Fixed Point is native to COBOL, and every other language said "Floating point is good enough for everyone."?

[ratsnakegames@mastodon.social]

@eniko pretty important for, like, finance and shit

[muri@troet.cafe]

@eniko what a rollercoaster of emotions!

[gabrielesvelto@mas.to]

@ratsnakegames @eniko

[gabrielesvelto@mas.to]

@ratsnakegames @eniko I wanted to write COBOL not FORTRAN but my brain missed a beat

[ratsnakegames@mastodon.social]

@gabrielesvelto @eniko we still do that sh*t in Java or .NET these days because financial regulators really frown upon money vanishing because of floating point errors

[gabrielesvelto@mas.to]

@ratsnakegames and I commend you for that! In a past life I worked for a high-frquency trading firm and their software did financial calculations using floating point numbers 🤷

[gabrielesvelto@mas.to]

@eniko jumpscare

[m3t00@app.wafrn.net]

when 64kb ram was all anyone would ever need

[sabik@rants.au]

@gabrielesvelto @ratsnakegames
Eh, as long as there's enough bits in the mantissa...

[kevingranade@mastodon.gamedev.place]

@eniko following with interest.

[eniko@mastodon.gamedev.place]

I have completed the triangle rasterizer fixed point conversion

The benchmarks have all improved between 0 and 35%

Except for threaded random triangles with flat color. That metric has increased 106%. As in its twice as fast as before

I have no idea why but I'm fairly sure I've ruled out bugs in my benchmarking

I am very confused

[atridas@mastodon.gamedev.place]

@eniko fixed point is very fun

[lina@vt.social]

@eniko Hyperthreading? That has very different behavior depending on the kind of code being run. A single core might have twice the int resources to handle two threads of throughput but not twice the float resources (and then it depends on how bottlenecked by things like memory latency the benchmark is).

[eniko@mastodon.gamedev.place]

@lina I don't know? >_> I just split the screen between 4 worker threads that all draw each triangle to their quadrant