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Intel Mesa Driver Now Handles Register Spilling

Intel

Published on 02 October 2012 01:00 AM EDT
Written by Michael Larabel in Intel
1 Comment

The Intel i965 Mesa DRI driver can now handle register spilling.

Register spilling is what happens when allocating variables but there are no longer enough registers available so some registers need to be placed (or "spilled") in RAM instead. Up to this point there hasn't been the support within the Intel Mesa driver so it would simply fail, while now it's able to use memory when out of registers. Update: Daniel Vetter has clarified that the Intel driver has had register spilling support for the fragment shader already but that this is just for the VS.

Kenneth Graunke provided the patch to implement register spilling on the Mesa-dev mailing list. This might also be back-ported to Mesa 9.0. "This is a candidate for the 9.0 branch. Even if it proves to have bugs, it's likely better than simply failing to compile."

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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