1 use rustc_hir::def_id::LOCAL_CRATE;
2 use rustc_middle::ty::query::Providers;
3 use rustc_session::Session;
4 use rustc_span::symbol::sym;
5 use rustc_span::symbol::Symbol;
7 // When adding features to the below lists
8 // check whether they're named already elsewhere in rust
9 // e.g. in stdarch and whether the given name matches LLVM's
10 // if it doesn't, to_llvm_feature in llvm_util in rustc_codegen_llvm needs to be adapted
12 const ARM_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
13 ("aclass", Some(sym::arm_target_feature)),
14 ("mclass", Some(sym::arm_target_feature)),
15 ("rclass", Some(sym::arm_target_feature)),
16 ("dsp", Some(sym::arm_target_feature)),
17 ("neon", Some(sym::arm_target_feature)),
18 ("crc", Some(sym::arm_target_feature)),
19 ("crypto", Some(sym::arm_target_feature)),
20 ("v5te", Some(sym::arm_target_feature)),
21 ("v6", Some(sym::arm_target_feature)),
22 ("v6k", Some(sym::arm_target_feature)),
23 ("v6t2", Some(sym::arm_target_feature)),
24 ("v7", Some(sym::arm_target_feature)),
25 ("v8", Some(sym::arm_target_feature)),
26 ("vfp2", Some(sym::arm_target_feature)),
27 ("vfp3", Some(sym::arm_target_feature)),
28 ("vfp4", Some(sym::arm_target_feature)),
29 ("fp-armv8", Some(sym::arm_target_feature)),
30 // This is needed for inline assembly, but shouldn't be stabilized as-is
31 // since it should be enabled per-function using #[instruction_set], not
33 ("thumb-mode", Some(sym::arm_target_feature)),
36 // Commented features are not available in LLVM 10.0, or have since been renamed
37 const AARCH64_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
39 ("neon", Some(sym::aarch64_target_feature)),
41 ("fp", Some(sym::aarch64_target_feature)),
43 ("fp16", Some(sym::aarch64_target_feature)),
45 ("sve", Some(sym::aarch64_target_feature)),
47 ("crc", Some(sym::aarch64_target_feature)),
48 // Cryptographic extension
49 ("crypto", Some(sym::aarch64_target_feature)),
51 ("ras", Some(sym::aarch64_target_feature)),
53 ("lse", Some(sym::aarch64_target_feature)),
55 ("rdm", Some(sym::aarch64_target_feature)),
57 ("rcpc", Some(sym::aarch64_target_feature)),
59 ("rcpc2", Some(sym::aarch64_target_feature)),
61 ("dotprod", Some(sym::aarch64_target_feature)),
63 ("tme", Some(sym::aarch64_target_feature)),
65 ("fhm", Some(sym::aarch64_target_feature)),
67 ("dit", Some(sym::aarch64_target_feature)),
69 // ("flagm", Some(sym::aarch64_target_feature)),
71 ("ssbs", Some(sym::aarch64_target_feature)),
73 ("sb", Some(sym::aarch64_target_feature)),
75 // ("pauth", Some(sym::aarch64_target_feature)),
77 ("dpb", Some(sym::aarch64_target_feature)),
79 ("dpb2", Some(sym::aarch64_target_feature)),
81 ("sve2", Some(sym::aarch64_target_feature)),
83 ("sve2-aes", Some(sym::aarch64_target_feature)),
85 ("sve2-sm4", Some(sym::aarch64_target_feature)),
87 ("sve2-sha3", Some(sym::aarch64_target_feature)),
89 ("sve2-bitperm", Some(sym::aarch64_target_feature)),
91 ("frintts", Some(sym::aarch64_target_feature)),
93 // ("i8mm", Some(sym::aarch64_target_feature)),
95 // ("f32mm", Some(sym::aarch64_target_feature)),
97 // ("f64mm", Some(sym::aarch64_target_feature)),
99 // ("bf16", Some(sym::aarch64_target_feature)),
101 ("rand", Some(sym::aarch64_target_feature)),
103 ("bti", Some(sym::aarch64_target_feature)),
105 ("mte", Some(sym::aarch64_target_feature)),
107 ("jsconv", Some(sym::aarch64_target_feature)),
109 ("fcma", Some(sym::aarch64_target_feature)),
110 // FEAT_SHA1 & FEAT_SHA256
111 ("sha2", Some(sym::aarch64_target_feature)),
112 // FEAT_SHA512 & FEAT_SHA3
113 ("sha3", Some(sym::aarch64_target_feature)),
114 // FEAT_SM3 & FEAT_SM4
115 ("sm4", Some(sym::aarch64_target_feature)),
116 ("v8.1a", Some(sym::aarch64_target_feature)),
117 ("v8.2a", Some(sym::aarch64_target_feature)),
118 ("v8.3a", Some(sym::aarch64_target_feature)),
119 ("v8.4a", Some(sym::aarch64_target_feature)),
120 ("v8.5a", Some(sym::aarch64_target_feature)),
121 // ("v8.6a", Some(sym::aarch64_target_feature)),
122 // ("v8.7a", Some(sym::aarch64_target_feature)),
125 const X86_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
126 ("adx", Some(sym::adx_target_feature)),
130 ("avx512bf16", Some(sym::avx512_target_feature)),
131 ("avx512bitalg", Some(sym::avx512_target_feature)),
132 ("avx512bw", Some(sym::avx512_target_feature)),
133 ("avx512cd", Some(sym::avx512_target_feature)),
134 ("avx512dq", Some(sym::avx512_target_feature)),
135 ("avx512er", Some(sym::avx512_target_feature)),
136 ("avx512f", Some(sym::avx512_target_feature)),
137 ("avx512gfni", Some(sym::avx512_target_feature)),
138 ("avx512ifma", Some(sym::avx512_target_feature)),
139 ("avx512pf", Some(sym::avx512_target_feature)),
140 ("avx512vaes", Some(sym::avx512_target_feature)),
141 ("avx512vbmi", Some(sym::avx512_target_feature)),
142 ("avx512vbmi2", Some(sym::avx512_target_feature)),
143 ("avx512vl", Some(sym::avx512_target_feature)),
144 ("avx512vnni", Some(sym::avx512_target_feature)),
145 ("avx512vp2intersect", Some(sym::avx512_target_feature)),
146 ("avx512vpclmulqdq", Some(sym::avx512_target_feature)),
147 ("avx512vpopcntdq", Some(sym::avx512_target_feature)),
150 ("cmpxchg16b", Some(sym::cmpxchg16b_target_feature)),
151 ("ermsb", Some(sym::ermsb_target_feature)),
152 ("f16c", Some(sym::f16c_target_feature)),
156 ("movbe", Some(sym::movbe_target_feature)),
161 ("rtm", Some(sym::rtm_target_feature)),
168 ("sse4a", Some(sym::sse4a_target_feature)),
170 ("tbm", Some(sym::tbm_target_feature)),
177 const HEXAGON_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
178 ("hvx", Some(sym::hexagon_target_feature)),
179 ("hvx-length128b", Some(sym::hexagon_target_feature)),
182 const POWERPC_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
183 ("altivec", Some(sym::powerpc_target_feature)),
184 ("power8-altivec", Some(sym::powerpc_target_feature)),
185 ("power9-altivec", Some(sym::powerpc_target_feature)),
186 ("power8-vector", Some(sym::powerpc_target_feature)),
187 ("power9-vector", Some(sym::powerpc_target_feature)),
188 ("vsx", Some(sym::powerpc_target_feature)),
191 const MIPS_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] =
192 &[("fp64", Some(sym::mips_target_feature)), ("msa", Some(sym::mips_target_feature))];
194 const RISCV_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
195 ("m", Some(sym::riscv_target_feature)),
196 ("a", Some(sym::riscv_target_feature)),
197 ("c", Some(sym::riscv_target_feature)),
198 ("f", Some(sym::riscv_target_feature)),
199 ("d", Some(sym::riscv_target_feature)),
200 ("e", Some(sym::riscv_target_feature)),
203 const WASM_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
204 ("simd128", Some(sym::wasm_target_feature)),
205 ("atomics", Some(sym::wasm_target_feature)),
206 ("nontrapping-fptoint", Some(sym::wasm_target_feature)),
209 /// When rustdoc is running, provide a list of all known features so that all their respective
210 /// primitives may be documented.
212 /// IMPORTANT: If you're adding another feature list above, make sure to add it to this iterator!
213 pub fn all_known_features() -> impl Iterator<Item = (&'static str, Option<Symbol>)> {
215 .chain(ARM_ALLOWED_FEATURES.iter())
216 .chain(AARCH64_ALLOWED_FEATURES.iter())
217 .chain(X86_ALLOWED_FEATURES.iter())
218 .chain(HEXAGON_ALLOWED_FEATURES.iter())
219 .chain(POWERPC_ALLOWED_FEATURES.iter())
220 .chain(MIPS_ALLOWED_FEATURES.iter())
221 .chain(RISCV_ALLOWED_FEATURES.iter())
222 .chain(WASM_ALLOWED_FEATURES.iter())
226 pub fn supported_target_features(sess: &Session) -> &'static [(&'static str, Option<Symbol>)] {
227 match &*sess.target.arch {
228 "arm" => ARM_ALLOWED_FEATURES,
229 "aarch64" => AARCH64_ALLOWED_FEATURES,
230 "x86" | "x86_64" => X86_ALLOWED_FEATURES,
231 "hexagon" => HEXAGON_ALLOWED_FEATURES,
232 "mips" | "mips64" => MIPS_ALLOWED_FEATURES,
233 "powerpc" | "powerpc64" => POWERPC_ALLOWED_FEATURES,
234 "riscv32" | "riscv64" => RISCV_ALLOWED_FEATURES,
235 "wasm32" | "wasm64" => WASM_ALLOWED_FEATURES,
240 pub(crate) fn provide(providers: &mut Providers) {
241 providers.supported_target_features = |tcx, cnum| {
242 assert_eq!(cnum, LOCAL_CRATE);
243 if tcx.sess.opts.actually_rustdoc {
244 // rustdoc needs to be able to document functions that use all the features, so
245 // whitelist them all
246 all_known_features().map(|(a, b)| (a.to_string(), b)).collect()
248 supported_target_features(tcx.sess).iter().map(|&(a, b)| (a.to_string(), b)).collect()