Comment # 1
on bug 85596
from Alex Deucher
(In reply to Lauri Kasanen from comment #0) > Many big shaders that currently fail with > r600_shader_select - Failed to build shader variant (type=1) -12 > r600_shader_from_tgsi - GPR limit exceeded - shader requires foo registers > > would actually work if the GPR check was moved to after SB, as SB reduces > the GPR usage quite nicely. > > Another thing is that 128 is the lowest common denominator, and many cards > have 192 or 256, which could be checked with the radeon_info ioctl. >From an ISA perspective, there are only 128 GPRs. The higher limits are hw internal details.
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