1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

//! Aarch64 run-time features.

features! {
    @TARGET: aarch64;
    @CFG: target_arch = "aarch64";
    @MACRO_NAME: is_aarch64_feature_detected;
    @MACRO_ATTRS:
    /// This macro tests, at runtime, whether an `aarch64` feature is enabled on aarch64 platforms.
    /// Currently most features are only supported on linux-based platforms.
    ///
    /// This macro takes one argument which is a string literal of the feature being tested for.
    /// The feature names are mostly taken from their FEAT_* definitions in the [ARM Architecture
    /// Reference Manual][docs].
    ///
    /// ## Supported arguments
    ///
    /// * `"asimd"` or "neon" - FEAT_AdvSIMD
    /// * `"pmull"` - FEAT_PMULL
    /// * `"fp"` - FEAT_FP
    /// * `"fp16"` - FEAT_FP16
    /// * `"sve"` - FEAT_SVE
    /// * `"crc"` - FEAT_CRC
    /// * `"lse"` - FEAT_LSE
    /// * `"lse2"` - FEAT_LSE2
    /// * `"rdm"` - FEAT_RDM
    /// * `"rcpc"` - FEAT_LRCPC
    /// * `"rcpc2"` - FEAT_LRCPC2
    /// * `"dotprod"` - FEAT_DotProd
    /// * `"tme"` - FEAT_TME
    /// * `"fhm"` - FEAT_FHM
    /// * `"dit"` - FEAT_DIT
    /// * `"flagm"` - FEAT_FLAGM
    /// * `"ssbs"` - FEAT_SSBS
    /// * `"sb"` - FEAT_SB
    /// * `"paca"` - FEAT_PAuth (address authentication)
    /// * `"pacg"` - FEAT_Pauth (generic authentication)
    /// * `"dpb"` - FEAT_DPB
    /// * `"dpb2"` - FEAT_DPB2
    /// * `"sve2"` - FEAT_SVE2
    /// * `"sve2-aes"` - FEAT_SVE2_AES
    /// * `"sve2-sm4"` - FEAT_SVE2_SM4
    /// * `"sve2-sha3"` - FEAT_SVE2_SHA3
    /// * `"sve2-bitperm"` - FEAT_SVE2_BitPerm
    /// * `"frintts"` - FEAT_FRINTTS
    /// * `"i8mm"` - FEAT_I8MM
    /// * `"f32mm"` - FEAT_F32MM
    /// * `"f64mm"` - FEAT_F64MM
    /// * `"bf16"` - FEAT_BF16
    /// * `"rand"` - FEAT_RNG
    /// * `"bti"` - FEAT_BTI
    /// * `"mte"` - FEAT_MTE
    /// * `"jsconv"` - FEAT_JSCVT
    /// * `"fcma"` - FEAT_FCMA
    /// * `"aes"` - FEAT_AES
    /// * `"sha2"` - FEAT_SHA1 & FEAT_SHA256
    /// * `"sha3"` - FEAT_SHA512 & FEAT_SHA3
    /// * `"sm4"` - FEAT_SM3 & FEAT_SM4
    ///
    /// [docs]: https://developer.arm.com/documentation/ddi0487/latest
    #[stable(feature = "simd_aarch64", since = "1.60.0")]
    @BIND_FEATURE_NAME: "asimd"; "neon";
    @NO_RUNTIME_DETECTION: "ras";
    @NO_RUNTIME_DETECTION: "v8.1a";
    @NO_RUNTIME_DETECTION: "v8.2a";
    @NO_RUNTIME_DETECTION: "v8.3a";
    @NO_RUNTIME_DETECTION: "v8.4a";
    @NO_RUNTIME_DETECTION: "v8.5a";
    @NO_RUNTIME_DETECTION: "v8.6a";
    @NO_RUNTIME_DETECTION: "v8.7a";
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] asimd: "neon";
    /// FEAT_AdvSIMD (Advanced SIMD/NEON)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] pmull: "pmull";
    /// FEAT_PMULL (Polynomial Multiply)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] fp: "fp";
    implied by target_features: ["neon"];
    /// FEAT_FP (Floating point support) - Implied by `neon` target_feature
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] fp16: "fp16";
    /// FEAT_FP16 (Half-float support)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sve: "sve";
    /// FEAT_SVE (Scalable Vector Extension)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] crc: "crc";
    /// FEAT_CRC32 (Cyclic Redundancy Check)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] lse: "lse";
    /// FEAT_LSE (Large System Extension - atomics)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] lse2: "lse2";
    /// FEAT_LSE2 (unaligned and register-pair atomics)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] rdm: "rdm";
    /// FEAT_RDM (Rounding Doubling Multiply - ASIMDRDM)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] rcpc: "rcpc";
    /// FEAT_LRCPC (Release consistent Processor consistent)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] rcpc2: "rcpc2";
    /// FEAT_LRCPC2 (RCPC with immediate offsets)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] dotprod: "dotprod";
    /// FEAT_DotProd (Vector Dot-Product - ASIMDDP)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] tme: "tme";
    /// FEAT_TME (Transactional Memory Extensions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] fhm: "fhm";
    /// FEAT_FHM (fp16 multiplication instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] dit: "dit";
    /// FEAT_DIT (Data Independent Timing instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] flagm: "flagm";
    /// FEAT_FLAGM (flag manipulation instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] ssbs: "ssbs";
    /// FEAT_SSBS (speculative store bypass safe)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sb: "sb";
    /// FEAT_SB (speculation barrier)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] paca: "paca";
    /// FEAT_PAuth (address authentication)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] pacg: "pacg";
    /// FEAT_PAuth (generic authentication)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] dpb: "dpb";
    /// FEAT_DPB (aka dcpop - data cache clean to point of persistence)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] dpb2: "dpb2";
    /// FEAT_DPB2 (aka dcpodp - data cache clean to point of deep persistence)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sve2: "sve2";
    /// FEAT_SVE2 (Scalable Vector Extension 2)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sve2_aes: "sve2-aes";
    /// FEAT_SVE_AES (SVE2 AES crypto)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sve2_sm4: "sve2-sm4";
    /// FEAT_SVE_SM4 (SVE2 SM4 crypto)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sve2_sha3: "sve2-sha3";
    /// FEAT_SVE_SHA3 (SVE2 SHA3 crypto)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sve2_bitperm: "sve2-bitperm";
    /// FEAT_SVE_BitPerm (SVE2 bit permutation instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] frintts: "frintts";
    /// FEAT_FRINTTS (float to integer rounding instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] i8mm: "i8mm";
    /// FEAT_I8MM (integer matrix multiplication, plus ASIMD support)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] f32mm: "f32mm";
    /// FEAT_F32MM (single-precision matrix multiplication)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] f64mm: "f64mm";
    /// FEAT_F64MM (double-precision matrix multiplication)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] bf16: "bf16";
    /// FEAT_BF16 (BFloat16 type, plus MM instructions, plus ASIMD support)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] rand: "rand";
    /// FEAT_RNG (Random Number Generator)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] bti: "bti";
    /// FEAT_BTI (Branch Target Identification)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] mte: "mte";
    /// FEAT_MTE (Memory Tagging Extension)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] jsconv: "jsconv";
    /// FEAT_JSCVT (JavaScript float conversion instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] fcma: "fcma";
    /// FEAT_FCMA (float complex number operations)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] aes: "aes";
    /// FEAT_AES (AES instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sha2: "sha2";
    /// FEAT_SHA1 & FEAT_SHA256 (SHA1 & SHA2-256 instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sha3: "sha3";
    /// FEAT_SHA512 & FEAT_SHA3 (SHA2-512 & SHA3 instructions)
    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sm4: "sm4";
    /// FEAT_SM3 & FEAT_SM4 (SM3 & SM4 instructions)
}