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Author SHA1 Message Date
Craig Topper a1ae3c6ac9 [RISCV][LegalizeDAG] Expand SETO and SETUO comparisons. Teach LegalizeDAG to expand SETUO expansion when UNE isn't legal. 
If SETUNE isn't legal, UO can use the NOT of the SETO expansion.

Removes some complex isel patterns. Most of the test changes are
from using XORI instead of SEQZ.

Differential Revision: https://reviews.llvm.org/D92008
 2020-12-10 09:15:52 -08:00
Hsiangkai Wang f7bc7c2981 [RISCV] Support Zfh half-precision floating-point extension. 
Support "Zfh" extension according to
https://github.com/riscv/riscv-isa-manual/blob/zfh/src/zfh.tex

Differential Revision: https://reviews.llvm.org/D90738
 2020-12-03 09:16:33 +08:00