assembly: single instruction poly?

Shifrin · 18 Aug 2005

For Poly/Mono4 I'm sure this is the quickest way - would love to know if there is a faster way 😉

Shif.

infuzion · 18 Aug 2005

Thanks I wasn't sure if there had to be 4 seperate instructions like you had in the Pow Poly module.

Shifrin · 18 Aug 2005

The SSE instructions can operate on four floats at a time, and sqrtps is an SSE instruction - so it only appears once in the code 🙂

The 'Poly Pow(x,n)' module has to use FPU instructions, these only operate on one float at a time, so the code calculating pow(x,n) appears four times!

Shif.

infuzion · 18 Aug 2005

cheers now I feel so much wiser 🙂

caleb · 19 Aug 2005

Just out of curiosity - should I be worried at this point that I don't understand anything that is being said here?

I just want to see if there is "must know" information about how SynthMaker handles things like this that I really need to understand before digging too deeply.

Alot of the recent announcements and discussions about streams etc. has left me feeling quite lost.

Caleb

stefan · 19 Aug 2005

I don't think you have to understand how to deal with numbers when using SSE registers etc to be a SM user. It's enough to know that when using streams, the same components can be used as mono, mono4 or poly components.

Usually, a mono4 component that is mainly relying upon SSE will use about as much cpu as a mono component. Which is good to know, because you can often use one filter module instead of four etc when you're doing. Oh, I don't know, having filters in your stereo delay or building an EQ or whatever 🙂

I don't think you should worry TOO much about how one actually deals with these things on an "assembler language level", we can't expect everyone to be as geeky as us 🙂

caleb · 19 Aug 2005

stefancrs wrote: I don't think you should worry TOO much about how one actually deals with these things on an "assembler language level", we can't expect everyone to be as geeky as us 🙂

Yes - but if I would like to get geeky at some stage - will there be plenty of fellow geeks to help me out? 😉

Caleb

stefan · 19 Aug 2005

Ofcourse 🙂

Shifrin · 19 Aug 2005

stefancrs wrote: Ofcourse 🙂

Indeed!

Shif.

infuzion · 19 Aug 2005

stefancrs wrote: Usually, a mono4 component that is mainly relying upon SSE will use about as much cpu as a mono component. Which is good to know, because you can often use one filter module instead of four etc when you're doing.

Conversely, you do have to worry if there are 4 FPU instructions being used in parrell, like in the case of the Stream/Poly Power modules. In this case, a Mono Power moudle is supplied. But don't worry that much untill final stages or you notice CPU is too high.