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[FMV] Remove features without compiler support and consolidate others.
It was raised in ARM-software#315 that some features are of no use. In this revision I am removing FMV features that have no equivalent backend feature in the compiler therefore cannot be supported in any meaningful way [1], and I am fusing FMV features that the compiler cannot support independently [2]. [1]: dgh, ebf16, rpres, sve-bf16, sve-ebf16, sve-i8mm, memtag3 [2]: {sha1, sha2}, {aes, pmull}, {sve2-aes, sve2-pmull128}, {memtag, memtag2}, {ssbs, ssbs2}, {ls64, ls64_v, ls64_accdata}
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‎main/acle.md‎

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@@ -398,6 +398,8 @@ Armv8.4-A [[ARMARMv84]](#ARMARMv84). Support is added for the Dot Product intrin
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* Fixed incorrect system register dependencies in Function Multi Versioning.
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* Added a requirement for function version declaration in Function Multi Versioning.
401+
* Removed FMV features without compiler support: dgh, ebf16, rpres, sve-bf16, sve-ebf16, sve-i8mm, memtag3.
402+
* Consolidated FMV features: {sha1, sha2}, {aes, pmull}, {sve2-aes, sve2-pmull128}, {memtag, memtag2}, {ssbs, ssbs2}, {ls64, ls64_v, ls64_accdata}.
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### References
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@@ -2607,11 +2609,9 @@ The following table lists the architectures feature mapping for AArch64
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| 106 | `FEAT_SM3`, `FEAT_SM4` | sm4 | ```ID_AA64ISAR0_EL1.SM4 >= 0b0001``` |
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| 108 | `FEAT_RDM` | rdm, rdma | ```ID_AA64ISAR0_EL1.RDM >= 0b0001``` |
26092611
| 110 | `FEAT_CRC32` | crc | ```ID_AA64ISAR0_EL1.CRC32 >= 0b0001``` |
2610-
| 120 | `FEAT_SHA1` | sha1 | ```ID_AA64ISAR0_EL1.SHA1 >= 0b0001``` |
2611-
| 130 | `FEAT_SHA256` | sha2 | ```ID_AA64ISAR0_EL1.SHA2 >= 0b0001``` |
2612+
| 130 | `FEAT_SHA1`,`FEAT_SHA256`| sha2 | ```ID_AA64ISAR0_EL1.SHA2 >= 0b0001``` |
26122613
| 140 | `FEAT_SHA512`,`FEAT_SHA3`| sha3 | ```ID_AA64ISAR0_EL1.SHA3 >= 0b0001``` |
2613-
| 150 | `FEAT_AES` | aes | ```ID_AA64ISAR0_EL1.AES >= 0b0001``` |
2614-
| 160 | `FEAT_PMULL` | pmull | ```ID_AA64ISAR0_EL1.AES >= 0b0010``` |
2614+
| 150 | `FEAT_AES`,`FEAT_PMULL` | aes | ```ID_AA64ISAR0_EL1.AES >= 0b0010``` |
26152615
| 170 | `FEAT_FP16` | fp16 | ```ID_AA64PFR0_EL1.FP == 0b0001``` |
26162616
| 175 | `FEAT_FHM` | fp16fml | ```ID_AA64ISAR0_EL1.FHM >= 0b0001``` |
26172617
| 180 | `FEAT_DIT` | dit | ```ID_AA64PFR0_EL1.DIT >= 0b0001``` |
@@ -2623,35 +2623,23 @@ The following table lists the architectures feature mapping for AArch64
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| 240 | `FEAT_LRCPC2` | rcpc2 | ```ID_AA64ISAR1_EL1.LRCPC >= 0b0010``` |
26242624
| 241 | `FEAT_LRCPC3` | rcpc3 | ```ID_AA64ISAR1_EL1.LRCPC >= 0b0011``` |
26252625
| 250 | `FEAT_FRINTTS` | frintts | ```ID_AA64ISAR1_EL1.FRINTTS >= 0b0001``` |
2626-
| 260 | `FEAT_DGH` | dgh | ```ID_AA64ISAR1_EL1.DGH >= 0b0001``` |
26272626
| 270 | `FEAT_I8MM` | i8mm | ```ID_AA64ISAR1_EL1.I8MM >= 0b0001``` |
26282627
| 280 | `FEAT_BF16` | bf16 | ```ID_AA64ISAR1_EL1.BF16 >= 0b0001``` |
2629-
| 290 | `FEAT_EBF16` | ebf16 | ```ID_AA64ISAR1_EL1.BF16 >= 0b0010``` |
2630-
| 300 | `FEAT_RPRES` | rpres | ```ID_AA64ISAR2_EL1.RPRES >= 0b0001``` |
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| 310 | `FEAT_SVE` | sve | ```ID_AA64PFR0_EL1.SVE >= 0b0001``` |
2632-
| 320 | `FEAT_BF16` | sve-bf16 | ```ID_AA64ZFR0_EL1.BF16 >= 0b0001``` |
2633-
| 330 | `FEAT_EBF16` | sve-ebf16 | ```ID_AA64ZFR0_EL1.BF16 >= 0b0010``` |
2634-
| 340 | `FEAT_I8MM` | sve-i8mm | ```ID_AA64ZFR0_EL1.I8MM >= 0b00001``` |
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| 350 | `FEAT_F32MM` | f32mm | ```ID_AA64ZFR0_EL1.F32MM >= 0b00001``` |
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| 360 | `FEAT_F64MM` | f64mm | ```ID_AA64ZFR0_EL1.F64MM >= 0b00001``` |
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| 370 | `FEAT_SVE2` | sve2 | ```ID_AA64ZFR0_EL1.SVEver >= 0b0001``` |
2638-
| 380 | `FEAT_SVE_AES` | sve2-aes | ```ID_AA64ZFR0_EL1.AES >= 0b0001``` |
2639-
| 390 | `FEAT_SVE_PMULL128` | sve2-pmull128 | ```ID_AA64ZFR0_EL1.AES >= 0b0010``` |
2632+
| 380 | `FEAT_SVE_AES`,<br>`FEAT_SVE_PMULL128`| sve2-aes | ```ID_AA64ZFR0_EL1.AES >= 0b0010``` |
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| 400 | `FEAT_SVE_BitPerm` | sve2-bitperm | ```ID_AA64ZFR0_EL1.BitPerm >= 0b0001``` |
26412634
| 410 | `FEAT_SVE_SHA3` | sve2-sha3 | ```ID_AA64ZFR0_EL1.SHA3 >= 0b0001``` |
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| 420 | `FEAT_SM3`,`FEAT_SVE_SM4`| sve2-sm4 | ```ID_AA64ZFR0_EL1.SM4 >= 0b0001``` |
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| 430 | `FEAT_SME` | sme | ```ID_AA64PFR1_EL1.SME >= 0b0001``` |
2644-
| 440 | `FEAT_MTE` | memtag | ```ID_AA64PFR1_EL1.MTE >= 0b0001``` |
2645-
| 450 | `FEAT_MTE2` | memtag2 | ```ID_AA64PFR1_EL1.MTE >= 0b0010``` |
2646-
| 460 | `FEAT_MTE3` | memtag3 | ```ID_AA64PFR1_EL1.MTE >= 0b0011``` |
2637+
| 440 | `FEAT_MTE`, `FEAT_MTE2` | memtag | ```ID_AA64PFR1_EL1.MTE >= 0b0010``` |
26472638
| 470 | `FEAT_SB` | sb | ```ID_AA64ISAR1_EL1.SB >= 0b0001``` |
26482639
| 480 | `FEAT_SPECRES` | predres | ```ID_AA64ISAR1_EL1.SPECRES >= 0b0001``` |
2649-
| 490 | `FEAT_SSBS` | ssbs | ```ID_AA64PFR1_EL1.SSBS >= 0b0001``` |
2650-
| 500 | `FEAT_SSBS2` | ssbs2 | ```ID_AA64PFR1_EL1.SSBS >= 0b0010``` |
2640+
| 490 | `FEAT_SSBS`, `FEAT_SSBS2`| ssbs | ```ID_AA64PFR1_EL1.SSBS >= 0b0010``` |
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| 510 | `FEAT_BTI` | bti | ```ID_AA64PFR1_EL1.BT >= 0b0001``` |
2652-
| 520 | `FEAT_LS64` | ls64 | ```ID_AA64ISAR1_EL1.LS64 >= 0b0001``` |
2653-
| 530 | `FEAT_LS64_V` | ls64_v | ```ID_AA64ISAR1_EL1.LS64 >= 0b0010``` |
2654-
| 540 | `FEAT_LS64_ACCDATA` | ls64_accdata | ```ID_AA64ISAR1_EL1.LS64 >= 0b0011``` |
2642+
| 520 | `FEAT_LS64`,`FEAT_LS64_V`,<br>`FEAT_LS64_ACCDATA`| ls64 | ```ID_AA64ISAR1_EL1.LS64 >= 0b0011``` |
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| 550 | `FEAT_WFxT` | wfxt | ```ID_AA64ISAR2_EL1.WFxT >= 0b0010``` |
26562644
| 560 | `FEAT_SME_F64F64` | sme-f64f64 | ```ID_AA64SMFR0_EL1.F64F64 == 0b1``` |
26572645
| 570 | `FEAT_SME_I16I64` | sme-i16i64 | ```ID_AA64SMFR0_EL1.I16I64 == 0b1111``` |

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