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Summary: This patch adds support for BFloat Matrix Multiplication Intrinsics and Code Generation from __bf16 to AArch32. This includes IR intrinsics. Tests are provided as needed. 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 The following people contributed to this patch: - Luke Geeson - Momchil Velikov - Mikhail Maltsev - Luke Cheeseman - Simon Tatham Reviewers: stuij, t.p.northover, SjoerdMeijer, sdesmalen, fpetrogalli, LukeGeeson, simon_tatham, dmgreen, MarkMurrayARM Reviewed By: MarkMurrayARM Subscribers: MarkMurrayARM, danielkiss, kristof.beyls, hiraditya, cfe-commits, llvm-commits, chill, miyuki Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D81740