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[FMV] Unify ls64, ls64_v and ls64_accdata. #346

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Sep 12, 2024
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[FMV] Unify ls64, ls64_v and ls64_accdata. #346

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5 changes: 2 additions & 3 deletions main/acle.md
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Original file line number Diff line number Diff line change
Expand Up @@ -403,6 +403,7 @@ Armv8.4-A [[ARMARMv84]](#ARMARMv84). Support is added for the Dot Product intrin
* Added `__FUNCTION_MULTI_VERSIONING_SUPPORT_LEVEL` to indicate the support
level of the [Function Multi Versioning](#function-multi-versioning).
* Unified Function Multi Versioning features sha1, sha2.
* Unified Function Multi Versioning features ls64, ls64_v, ls64_accdata.
* Added [**Alpha**](#current-status-and-anticipated-changes)
support for SME2.1 (FEAT_SME2p1).
* Removed requirement to add preprocessor guards for header files.
Expand Down Expand Up @@ -2755,9 +2756,7 @@ The following table lists the architectures feature mapping for AArch64
| 490 | `FEAT_SSBS` | ssbs | ```ID_AA64PFR1_EL1.SSBS >= 0b0001``` |
| 500 | `FEAT_SSBS2` | ssbs2 | ```ID_AA64PFR1_EL1.SSBS >= 0b0010``` |
| 510 | `FEAT_BTI` | bti | ```ID_AA64PFR1_EL1.BT >= 0b0001``` |
| 520 | `FEAT_LS64` | ls64 | ```ID_AA64ISAR1_EL1.LS64 >= 0b0001``` |
| 530 | `FEAT_LS64_V` | ls64_v | ```ID_AA64ISAR1_EL1.LS64 >= 0b0010``` |
| 540 | `FEAT_LS64_ACCDATA` | ls64_accdata | ```ID_AA64ISAR1_EL1.LS64 >= 0b0011``` |
| 520 | `FEAT_LS64`, `FEAT_LS64_V`, <br> `FEAT_LS64_ACCDATA` | ls64 | ```ID_AA64ISAR1_EL1.LS64 >= 0b0011``` |
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I think you only need FEAT_LS64_ACCDATA here since that is the correct feature.

In general it is not clear what we mean if we have multiple FEAT_ flags in an entry - all should be set. If we want to keep doing this, maybe we should make this more explicit?

| 550 | `FEAT_WFxT` | wfxt | ```ID_AA64ISAR2_EL1.WFxT >= 0b0010``` |
| 560 | `FEAT_SME_F64F64` | sme-f64f64 | ```ID_AA64SMFR0_EL1.F64F64 == 0b1``` |
| 570 | `FEAT_SME_I16I64` | sme-i16i64 | ```ID_AA64SMFR0_EL1.I16I64 == 0b1111``` |
Expand Down