Note: The following is relevant to the Windows DevKit 2023 context, as an example.
Begin forwarded message: From: Jonathan Thackray <[email protected]> Subject: Re: [llvm/llvm-project] A few default FEAT_??? mismatches for cortex-a78a and cortex-x1c (that should be the same for both) (Issue #62383) Date: January 4, 2024 at 12:07:00 PST To: llvm/llvm-project <[email protected]> Cc: Mark Millard <[email protected]>, Author <[email protected]> Reply-To: llvm/llvm-project <reply+abc3n4nrzfdxxogmwbejm56durbgjevbnhhgi3n...@reply.github.com> Closed #62383 as completed via #76932. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: <llvm/llvm-project/issue/62383/issue_event/[email protected]> That was after . . . Begin forwarded message: From: Jonathan Thackray <[email protected]> Subject: Re: [llvm/llvm-project] A few default FEAT_??? mismatches for cortex-a78a and cortex-x1c (that should be the same for both) (Issue #62383) Date: January 3, 2024 at 09:28:57 PST To: llvm/llvm-project <[email protected]> Cc: Mark Millard <[email protected]>, Author <[email protected]> Reply-To: llvm/llvm-project <reply+abc3n4ptdtmfvzgvjh35zvodulf5tevbnhhgi3n...@reply.github.com> Thanks for spotting this. I also checked some other Technical Reference Manuals, and it would appear that the Arm Cortex-X2 also supports Flag Manipulation, for bits 52-55 (TS) of ID_AA64ISAR0_EL1. I will add AArch64::AEK_FLAGM to both the Arm Cortex-X1C and Arm Cortex-X2 defined in llvm/include/llvm/TargetParser/AArch64TargetParser.h. The Arm Cortex-X1 does not support FLAGM. It appears that there is nothing to do in this bugfix for FEAT_LRCPC2 and FEAT_LSE2 as they are not currently fully defined. I will also remove AArch64::AEK_FP16FML from the Arm Cortex-A78C, as the Technical Reference Manual indicates this is not supported. TRM links: Arm Cortex-A78C: https://developer.arm.com/documentation/101430/latest/ Arm Cortex-X1: https://developer.arm.com/documentation/101433/latest/ Arm Cortex-X1C: https://developer.arm.com/documentation/101968/latest/ Arm Cortex-X2: https://developer.arm.com/documentation/101803/latest/ Arm Cortex-X3: https://developer.arm.com/documentation/101602/latest/ Arm Cortex-X4: https://developer.arm.com/documentation/102484/latest/ — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread. === Mark Millard marklmi at yahoo.com
