Commit Graph

2 Commits

Author SHA1 Message Date
Ties Stuij d678e14c55 [AArch64][CodeGen] Restrict bfloat vector operations to what's actually supported
Previously in addTypeForNeon, we would set the operations for bfloat vectors
like other generic types. But as bfloat is a storage-only type a number of
operations shouldn't be set. This patch fixes that.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D85101
2020-08-28 11:44:37 +01:00
Ties Stuij 78bd0c0e5e [AArch64][BFloat] add BFloat instruction support for AArch64
Summary:
Add support for lowering various BFloat related SelDAG nodes:
- load/store (ldrh/strh)
- concat
- dup/duplane
- bitconvert/bitcast
- insert_subvector/insert_subreg

This patch is part of a series implementing the Bfloat16 extension of the
Armv8.6-a architecture, as detailed here:

https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/arm-architecture-developments-armv8-6-a

The bfloat type, and its properties are specified in the Arm Architecture
Reference Manual:

https://developer.arm.com/docs/ddi0487/latest/arm-architecture-reference-manual-armv8-for-armv8-a-architecture-profile

Reviewers: ab, t.p.northover, john.brawn, fpetrogalli, sdesmalen, LukeGeeson

Reviewed By: fpetrogalli

Subscribers: LukeGeeson, pbarrio, kristof.beyls, hiraditya, danielkiss, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79712
2020-05-27 15:36:54 +01:00