3 Commits

Author	SHA1	Message	Date
Alex Bradbury	c4efcd6970	[RISCV] Generalise shouldExtendTypeInLibcall logic to apply to all <XLEN floats on soft ABIs ... This results in improved codegen for half/bf16 libcalls on soft ABIs Adds a RISCVSubtarget helper method for determining if a soft FP ABI is being targeted (future bf16 related patches make use of this). Differential Revision: https://reviews.llvm.org/D151434	2023-05-30 11:04:03 +01:00
Alex Bradbury	9bb34ca652	[RISCV][test] Expand bfloat.ll tests to include i16 bitcasts and load/store ... Pre-commit new tests used in D151663.	2023-05-29 21:38:26 +01:00
Alex Bradbury	061e368fe2	[SelectionDAG] Implement soft FP legalisation for bf16 FP_EXTEND and BF16_TO_FP ... As discussed in D151436, it's safe to do this as a simple shift (as is done in LegalizeDAG.cpp) rather than needing a libcall. The added test cases for RISC-V previously just triggered an assertion. Codegen for bfloat_to_double will be slightly improved by D151434. Differential Revision: https://reviews.llvm.org/D151563	2023-05-29 10:32:28 +01:00