|
Re: Bad math for video
|
Joined: Feb 2009
Posts: 3,466
connoisseur
|
connoisseur
Joined: Feb 2009
Posts: 3,466 |
When I was doing vector programming on the Cell processor I noticed that IBM was making a big deal about the Cell being able to perform double precision math while all GPUs at the time were limited to single.
But there was a 4x speed hit for using doubles over single precision floats. So the extra precision was there for people who needed it, but since I was processing raw data from camera sensors, that at most had 24-bits of precision (but the noise floor really only yielded 18-bits of accuracy), the single precision was enough.
Though the point is I could get the extra precision if I needed it. Chips that trade speed for accuracy will be extremely single purpose. There's no way to turn off the design flaw when you don't mind trading in the speed, like there is with traditional design.
Pioneer PDP-5020FD, Marantz SR6011 Axiom M5HP, VP160HP, QS8 Sony PS4, surround backs -Chris
|
|
|
Forums16
Topics24,946
Posts442,494
Members15,617
|
Most Online2,082 Jan 22nd, 2020
|
|
0 members (),
832
guests, and
3
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
|
|