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> There are many GPUs with no double precision floating point support in hardware. Which ones? I'm genuinely curious about this.
by gbrown_ 5y ago
> There are many GPUs with no double precision floating point support in hardware.
Which ones? I'm genuinely curious about this.
- modeless 5y agoI think all of the ones listed as DirectX 10.1 or lower on this page: https://en.wikipedia.org/wiki/Feature_levels_in_Direct3D https://en.wikipedia.org/wiki/Feature_levels_in_Direct3D Those are all quite old now of course, but even modern GPUs may not have 64-bit ALUs and rely on emulation instead. Intel Gen11 in Ice Lake, for example: https://01.org/sites/default/files/documentation/intel-gfx-prm-osrc-icllp-vol04-configurations_0.pdf https://01.org/sites/default/files/documentation/intel-gfx-p... In mobile architectures 64-bit ALUs can be an optional feature that is omitted for lower end configurations. I know this is true of PowerVR.
- gbrown_ 5y agoAh interesting to know about Gen11, thanks for the links.