Matt Arsenault 89ccfa1b39 AMDGPU: Use correct lowering for llvm.log2.f32 ...

We previously directly codegened to v_log_f32, which is broken for
denormals. The lowering isn't complicated, you simply need to scale
denormal inputs and adjust the result. Note log and log10 are still
not accurate enough, and will be fixed separately.

2023-06-23 08:37:37 -04:00

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