3 Commits

Author	SHA1	Message	Date
Craig Topper	03c8d6a0c4	[LegalizeDAG][RISCV][PowerPC][AMDGPU][WebAssembly] Improve expansion of SETONE/SETUEQ on targets without SETO/SETUO. ... If SETO/SETUO aren't legal, they'll be expanded and we'll end up with 3 comparisons. SETONE is equivalent to (SETOGT || SETOLT) so if one of those operations is supported use that expansion. We don't need both since we can commute the operands to make the other. SETUEQ can be implemented with !(SETOGT || SETOLT) or (SETULE && SETUGE). I've only implemented the first because it didn't look like most of the affected targets had legal SETULE/SETUGE. Reviewed By: frasercrmck, tlively, nemanjai Differential Revision: https://reviews.llvm.org/D94450	2021-01-12 10:45:03 -08:00
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