https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88494
--- Comment #8 from vekumar at gcc dot gnu.org --- I tested mdbx before and after the revision Richard pointed out. On My Ryzen box there is ~4% regression. Although "vblenvps" is fast path instruction and can execute in pipe 0/1. It competes with vcmpccsd, fma and muls instruction that are also executing on pipe 0|1. Looks to me regression is due to added dependency and port pressure. We need to benchmark with large application like SPEC and then decide whether we need to enable X86_TUNE_SCALAR_FLOAT_BLENDV tuning for Ryzen or not. On BDVER4 there were no blendvps generated and no regression seen.
