On Tue, 24 Apr 2012 00:34:00 -0700, Kenneth Graunke <[email protected]> wrote: > A little analysis shows that the worst-case value for "nr" is 16: > - base_mrf = 2 ... 2 > - header present (say gen == 5) ... 4 > - SIMD16 mode: += 4 * reg_width ... 12 > - source_depth_to_render_target ... 14 > - dest_depth_reg ... 16 > > This resulted in us setting base_mrf to 2 and mlen to 14. In other > words, we'd try to use m2..m16. But m16 doesn't exist pre-Gen6. Also,
nr is "where you'd put the next arg if there was one", right? so nr of 16 should be fine, since you've only loaded up to m15?
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