Marek Working Towards Even Lower SGPR Register Usage

Written by Michael Larabel in Radeon on 18 February 2018 at 10:15 AM EST. 11 Comments
Yesterday well known open-source AMD developer Marek Olšák landed his RadeonSI 32-bit pointers support for freeing up some scalar general purpose registers (SGPRs) and he's continued with a new patch series to alleviate register usage even more.

A set of 13 patches were posted on Saturday by Marek for reducing user SGPR register usage. When using merged tessellation and geometry shader with 64-bit pointers, SGPR register use drops from 18 to 14 but with 32-bit pointers drops from 11 to 6. Other combinations are also saving a few registers. This patch series also happens to be a prerequisite for vertex buffer object (VBO) descriptors in user SGPRs.

All the details via this patch series.
Related News
About The Author
Michael Larabel

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

Popular News This Week