Craig Topper aa91d90cb0 [LegalizeVectorOps][PowerPC] Use xor to expand fneg. (#106595) ...

This preserves the semantis of fneg and matches what we do in
LegalizeDAG.

I kept the legal FSUB check to force unrolling for some targets that
don't have FSUB but have XOR. On Aarch64, using xor broke some tests that
expected to see a (v1f64 (fma (insertvector_elt (f64 (fneg
(extractvectorelt X)))))) pattern.

2024-08-29 15:00:23 -07:00

60 KiB

Raw Blame History

View Raw