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attributes/codegen: update aarch64 features
Update `attributes/codegen.md` to match aarch64 CPU features known to rustc[1]. [1]: https://github.com/rust-lang/rust/blob/afa859f8121bf2985362a2c8414dc71a825ccf2d/compiler/rustc_target/src/target_features.rs#L179-L373
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‎src/attributes/codegen.md‎

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@@ -226,52 +226,52 @@ Reference Manual], or elsewhere on [developer.arm.com].
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> The following pairs of features should both be marked as enabled or disabled together if used:
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> - `paca` and `pacg`, which LLVM currently implements as one feature.
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Feature | Implicitly Enables | Feature Name
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---------------|--------------------|-------------------
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`aes` | `neon` | FEAT_AES & FEAT_PMULL --- Advanced <abbr title="Single Instruction Multiple Data">SIMD</abbr> AES & PMULL instructions
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`bf16` | | FEAT_BF16 --- BFloat16 instructions
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`bti` | | FEAT_BTI --- Branch Target Identification
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`crc` | | FEAT_CRC --- CRC32 checksum instructions
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`dit` | | FEAT_DIT --- Data Independent Timing instructions
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`dotprod` | | FEAT_DotProd --- Advanced SIMD Int8 dot product instructions
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`dpb` | | FEAT_DPB --- Data cache clean to point of persistence
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`dpb2` | | FEAT_DPB2 --- Data cache clean to point of deep persistence
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`f32mm` | `sve` | FEAT_F32MM --- SVE single-precision FP matrix multiply instruction
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`f64mm` | `sve` | FEAT_F64MM --- SVE double-precision FP matrix multiply instruction
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`fcma` | `neon` | FEAT_FCMA --- Floating point complex number support
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`fhm` | `fp16` | FEAT_FHM --- Half-precision FP FMLAL instructions
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`flagm` | | FEAT_FlagM --- Conditional flag manipulation
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`fp16` | `neon` | FEAT_FP16 --- Half-precision FP data processing
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`frintts` | | FEAT_FRINTTS --- Floating-point to int helper instructions
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`i8mm` | | FEAT_I8MM --- Int8 Matrix Multiplication
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`jsconv` | `neon` | FEAT_JSCVT --- JavaScript conversion instruction
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`lse` | | FEAT_LSE --- Large System Extension
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`lor` | | FEAT_LOR --- Limited Ordering Regions extension
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`mte` | | FEAT_MTE & FEAT_MTE2 --- Memory Tagging Extension
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`neon` | | FEAT_FP & FEAT_AdvSIMD --- Floating Point and Advanced SIMD extension
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`pan` | | FEAT_PAN --- Privileged Access-Never extension
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`paca` | | FEAT_PAuth --- Pointer Authentication (address authentication)
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`pacg` | | FEAT_PAuth --- Pointer Authentication (generic authentication)
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`pmuv3` | | FEAT_PMUv3 --- Performance Monitors extension (v3)
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`rand` | | FEAT_RNG --- Random Number Generator
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`ras` | | FEAT_RAS & FEAT_RASv1p1 --- Reliability, Availability and Serviceability extension
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`rcpc` | | FEAT_LRCPC --- Release consistent Processor Consistent
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`rcpc2` | `rcpc` | FEAT_LRCPC2 --- RcPc with immediate offsets
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`rdm` | | FEAT_RDM --- Rounding Double Multiply accumulate
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`sb` | | FEAT_SB --- Speculation Barrier
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`sha2` | `neon` | FEAT_SHA1 & FEAT_SHA256 --- Advanced SIMD SHA instructions
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`sha3` | `sha2` | FEAT_SHA512 & FEAT_SHA3 --- Advanced SIMD SHA instructions
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`sm4` | `neon` | FEAT_SM3 & FEAT_SM4 --- Advanced SIMD SM3/4 instructions
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`spe` | | FEAT_SPE --- Statistical Profiling Extension
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`ssbs` | | FEAT_SSBS & FEAT_SSBS2 --- Speculative Store Bypass Safe
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`sve` | `fp16` | FEAT_SVE --- Scalable Vector Extension
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`sve2` | `sve` | FEAT_SVE2 --- Scalable Vector Extension 2
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`sve2-aes` | `sve2`, `aes` | FEAT_SVE_AES --- SVE AES instructions
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`sve2-sm4` | `sve2`, `sm4` | FEAT_SVE_SM4 --- SVE SM4 instructions
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`sve2-sha3` | `sve2`, `sha3` | FEAT_SVE_SHA3 --- SVE SHA3 instructions
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`sve2-bitperm` | `sve2` | FEAT_SVE_BitPerm --- SVE Bit Permute
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`tme` | | FEAT_TME --- Transactional Memory Extension
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`vh` | | FEAT_VHE --- Virtualization Host Extensions
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Feature | Implicity Enables | Feature Name
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------- | ----------------- | ------------
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`aes` | `neon` | FEAT_AES & FEAT_PMULL --- Advanced <abbr title="Single Instruction Multiple Data">SIMD</abbr> AES & PMULL instructions
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`bf16` | | FEAT_BF16 --- BFloat16 instructions
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`bti` | | FEAT_BTI --- Branch Target Identification
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`crc` | | FEAT_CRC --- CRC32 checksum instructions
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`dit` | | FEAT_DIT --- Data Independent Timing instructions
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`dotprod` | `neon` | FEAT_DotProd --- Advanced SIMD Int8 dot product instructions
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`dpb` | | FEAT_DPB --- Data cache clean to point of persistence
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`dpb2` | `dpb` | FEAT_DPB2 --- Data cache clean to point of deep persistence
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`f32mm` | `sve` | FEAT_F32MM --- SVE single-precision FP matrix multiply instruction
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`f64mm` | `sve` | FEAT_F64MM --- SVE double-precision FP matrix multiply instruction
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`fcma` | `neon` | FEAT_FCMA --- Floating point complex number support
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`fhm` | `fp16` | FEAT_FHM --- Half-precision FP FMLAL instructions
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`flagm` | | FEAT_FLAGM --- Conditional flag manipulation
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`fp16` | `neon` | FEAT_FP16 --- Half-precision FP data processing
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`frintts` | | FEAT_FRINTTS --- Floating-point to int helper instructions
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`i8mm` | | FEAT_I8MM --- Int8 Matrix Multiplication
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`jsconv` | `neon` | FEAT_JSCVT --- JavaScript conversion instruction
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`lor` | | FEAT_LOR --- Limited Ordering Regions extension
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`lse` | | FEAT_LSE --- Large System Extensions
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`mte` | | FEAT_MTE & FEAT_MTE2 --- Memory Tagging Extension
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`neon` | | FEAT_AdvSimd & FEAT_FP --- Floating Point and Advanced SIMD extension
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`paca` | | FEAT_PAUTH --- Pointer Authentication (address authentication)
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`pacg` | | FEAT_PAUTH --- Pointer Authentication (generic authentication)
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`pan` | | FEAT_PAN --- Privileged Access-Never extension
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`pmuv3` | | FEAT_PMUv3 --- Performance Monitors extension (v3)
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`rand` | | FEAT_RNG --- Random Number Generator
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`ras` | | FEAT_RAS & FEAT_RASv1p1 --- Reliability, Availability and Serviceability extension
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`rcpc` | | FEAT_LRCPC --- Release consistent Processor Consistent
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`rcpc2` | `rcpc` | FEAT_LRCPC2 --- RcPc with immediate offsets
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`rdm` | `neon` | FEAT_RDM --- Rounding Double Multiply accumulate
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`sb` | | FEAT_SB --- Speculation Barrier
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`sha2` | `neon` | FEAT_SHA1 & FEAT_SHA256 --- Advanced SIMD SHA instructions
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`sha3` | `sha2` | FEAT_SHA512 & FEAT_SHA3 --- Advanced SIMD SHA instructions
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`sm4` | `neon` | FEAT_SM3 & FEAT_SM4 --- Advanced SIMD SM3/4 instructions
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`spe` | | FEAT_SPE --- Statistical Profiling Extension
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`ssbs` | | FEAT_SSBS & FEAT_SSBS2 --- Speculative Store Bypass Safe
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`sve` | `neon` | FEAT_SVE --- Scalable Vector Extension
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`sve2` | `sve` | FEAT_SVE2 --- Scalable Vector Extension 2
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`sve2-aes` | `sve2` `aes`, | FEAT_SVE_AES & FEAT_SVE_PMULL128 --- SVE AES instructions
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`sve2-bitperm` | `sve2` | FEAT_SVE2_BitPerm --- SVE Bit Permute
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`sve2-sha3` | `sve2` `sha3`, | FEAT_SVE2_SHA3 --- SVE SHA3 instructions
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`sve2-sm4` | `sve2` `sm4`, | FEAT_SVE2_SM4 --- SVE SM4 instructions
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`tme` | | FEAT_TME --- Transactional Memory Extension
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`vh` | | FEAT_VHE --- Virtualization Host Extensions
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r[attributes.codegen.target_feature.riscv]
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#### `riscv32` or `riscv64`

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