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3 commits

Author SHA1 Message Date
Raph Levien 69b6632085 Fix write-after-read in prefix test 
Thanks to Jeff Bolz for spotting the write-after-read hazard on the
sh_flag accesses. This fixes observed failures on Nvidia Turing and
Ampere on DX12.
 2021-11-14 07:13:15 -08:00
Raph Levien a0648a2153 Portability fixes 
The MSL translation of the prefix example had its bindings permuted; a
flag prevents this (but, as is typical for shader translation,
potentially creates other problems).

Also use explicit unsigned literal to avoid DXC warnings.
 2021-11-11 07:08:39 -08:00
Raph Levien 33d7b25a92 Start testing framework 
This adds a prefix sum test. This patch is also trying to get a little
more serious about structuring both the test runner (toward the goal of
collecting proper statistics) and pipeline stages for the tests.

Still WIP but giving good results.
 2021-11-06 11:24:34 -07:00