Matt Arsenault 16bc07ac91 AMDGPU: Select f64 fmul by negative power of 2 to ldexp ...

Select fmul x, -K -> ldexp(-x, log2(fabsK))
Select fmul fabs(x), -K -> ldexp(-|x|, log2(fabsK))

https://reviews.llvm.org/D158173

2023-08-23 20:36:01 -04:00

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