tree 3427edbd476288d38f8c609bf64f605c79a0b7f2
parent ebc22e0030e4ba3d02b021c44b5670926a57cae6
author Chris Dalton <csmartdalton@google.com> 1547852000 -0700
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1548176104 +0000

ccpr: Add explicit fmas to vertex placement code

It appears that some SPIR-V compilers are rearranging flops and fmas,
resulting in LSB differences on vertices that should be identical.
This rewrites the code with explicit fmas, and in a way that
discourages rearranging until we can find a better solution.

Bug: skia:7733
Bug: skia:8693
Change-Id: Ic4464ab3fa5fc2d2bc13b0b84671d8fa5f3c10a0
Reviewed-on: https://skia-review.googlesource.com/c/185420
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>