do our own fma discovery
Peephole add(F32,F32) for an argument that is a mul().
As a flourish, only generate Op::fma_f32 on machines we know support
real fused mul-adds. This removes the ambiguity of whether Op::mad_f32
is an FMA or not; the new Op::fma_f32 is always an FMA, and otherwise
you'll just see ordinary mul-add. No more Op::mad_f32.
Change-Id: I38016a2430774583116d8d6a8ada677012c1a8fc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/275138
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
3 files changed
