Beyond3D Forum

bigtabs · 13-Apr-2007, 14:03

The G80 uses a scalar architecture and the boffins round here seem to think that the R600 will too.

So, does this mean that both will necessarily perform the same operations?

i.e will one G80 stream processor necessarily do the same calculations as an R600 stream processor, assuming that it is scalar?

TIA

Xmas · 13-Apr-2007, 17:09

What exactly do you mean by "same operations"?

Many CPUs are scalar architectures. That doesn't mean the instruction sequences you get from compiling the same code for each of these platforms are identical, or even similar.

bigtabs · 13-Apr-2007, 22:30

What I was trying to ask : Presuming the R600 shader processors are scalar, does that mean they necessarily do the same work as a G80 shader processor? I see that what you are saying is no.

I'm just trying to get my head around the whole 320 vs 128 scalars thing.

Thanks for the response.

bigtabs · 14-Apr-2007, 10:30

For those coming to this thread hoping to find some enlightenment I'll add links to relevant posts as I find them.

Vector vs Scalar - Pete (Staff)

13-Apr-2007, 14:03	#1
bigtabs Senior Member Join Date: Jan 2007 Location: TDO, Germany Posts: 1,222	Scalar Operations The G80 uses a scalar architecture and the boffins round here seem to think that the R600 will too. So, does this mean that both will necessarily perform the same operations? i.e will one G80 stream processor necessarily do the same calculations as an R600 stream processor, assuming that it is scalar? TIA __________________ Trade Steam games with other B3D members Last edited by bigtabs; 13-Apr-2007 at 17:08.

13-Apr-2007, 17:09	#2
Xmas Off-season Join Date: Feb 2002 Location: On the pursuit of happiness Posts: 3,019	What exactly do you mean by "same operations"? Many CPUs are scalar architectures. That doesn't mean the instruction sequences you get from compiling the same code for each of these platforms are identical, or even similar. __________________ Binary prefixes for bits and bytes

13-Apr-2007, 22:30	#3
bigtabs Senior Member Join Date: Jan 2007 Location: TDO, Germany Posts: 1,222	What I was trying to ask : Presuming the R600 shader processors are scalar, does that mean they necessarily do the same work as a G80 shader processor? I see that what you are saying is no. I'm just trying to get my head around the whole 320 vs 128 scalars thing. Thanks for the response. __________________ Trade Steam games with other B3D members

14-Apr-2007, 10:30	#4
bigtabs Senior Member Join Date: Jan 2007 Location: TDO, Germany Posts: 1,222	For those coming to this thread hoping to find some enlightenment I'll add links to relevant posts as I find them. Vector vs Scalar - Pete (Staff) __________________ Trade Steam games with other B3D members

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