Expand feature detection on AArch64 Darwin

This reflects the currently available set of sysctl values as of macOS 15, on 2024-12-21.  Features not (yet) exposed by `is_aarch64_feature_detected` have been left in comments to document their existence for the future.

crates/std_detect/src/detect/os/darwin/aarch64.rs

@@ -39,63 +39,109 @@ pub(crate) fn detect_features() -> cache::Initializer {
         }
     };
 
-    let asimd = _sysctlbyname(c"hw.optional.AdvSIMD");
-    let pmull = _sysctlbyname(c"hw.optional.arm.FEAT_PMULL");
+    // Armv8.0 features not using the standard identifiers
     let fp = _sysctlbyname(c"hw.optional.floatingpoint");
-    let fp16 = _sysctlbyname(c"hw.optional.arm.FEAT_FP16");
+    let asimd = _sysctlbyname(c"hw.optional.AdvSIMD");
     let crc = _sysctlbyname(c"hw.optional.armv8_crc32");
-    let lse = _sysctlbyname(c"hw.optional.arm.FEAT_LSE");
-    let lse2 = _sysctlbyname(c"hw.optional.arm.FEAT_LSE2");
-    let rdm = _sysctlbyname(c"hw.optional.arm.FEAT_RDM");
-    let rcpc = _sysctlbyname(c"hw.optional.arm.FEAT_LRCPC");
-    let rcpc2 = _sysctlbyname(c"hw.optional.arm.FEAT_LRCPC2");
-    let dotprod = _sysctlbyname(c"hw.optional.arm.FEAT_DotProd");
-    let fhm = _sysctlbyname(c"hw.optional.arm.FEAT_FHM");
-    let flagm = _sysctlbyname(c"hw.optional.arm.FEAT_FlagM");
-    let ssbs = _sysctlbyname(c"hw.optional.arm.FEAT_SSBS");
-    let sb = _sysctlbyname(c"hw.optional.arm.FEAT_SB");
-    let paca = _sysctlbyname(c"hw.optional.arm.FEAT_PAuth");
+
+    // Armv8 and Armv9 features using the standard identifiers
+    let aes = _sysctlbyname(c"hw.optional.arm.FEAT_AES");
+    let bf16 = _sysctlbyname(c"hw.optional.arm.FEAT_BF16");
+    let bti = _sysctlbyname(c"hw.optional.arm.FEAT_BTI");
+    let dit = _sysctlbyname(c"hw.optional.arm.FEAT_DIT");
     let dpb = _sysctlbyname(c"hw.optional.arm.FEAT_DPB");
     let dpb2 = _sysctlbyname(c"hw.optional.arm.FEAT_DPB2");
+    let dotprod = _sysctlbyname(c"hw.optional.arm.FEAT_DotProd");
+    let ecv = _sysctlbyname(c"hw.optional.arm.FEAT_ECV");
+    let fcma = _sysctlbyname(c"hw.optional.arm.FEAT_FCMA");
+    let fhm = _sysctlbyname(c"hw.optional.arm.FEAT_FHM");
+    let fp16 = _sysctlbyname(c"hw.optional.arm.FEAT_FP16");
     let frintts = _sysctlbyname(c"hw.optional.arm.FEAT_FRINTTS");
+    let flagm = _sysctlbyname(c"hw.optional.arm.FEAT_FlagM");
+    let flagm2 = _sysctlbyname(c"hw.optional.arm.FEAT_FlagM2");
     let i8mm = _sysctlbyname(c"hw.optional.arm.FEAT_I8MM");
-    let bf16 = _sysctlbyname(c"hw.optional.arm.FEAT_BF16");
-    let bti = _sysctlbyname(c"hw.optional.arm.FEAT_BTI");
-    let fcma = _sysctlbyname(c"hw.optional.arm.FEAT_FCMA");
-    let aes = _sysctlbyname(c"hw.optional.arm.FEAT_AES");
+    let jsconv = _sysctlbyname(c"hw.optional.arm.FEAT_JSCVT");
+    let rcpc = _sysctlbyname(c"hw.optional.arm.FEAT_LRCPC");
+    let rcpc2 = _sysctlbyname(c"hw.optional.arm.FEAT_LRCPC2");
+    let lse = _sysctlbyname(c"hw.optional.arm.FEAT_LSE");
+    let lse2 = _sysctlbyname(c"hw.optional.arm.FEAT_LSE2");
+    let pauth = _sysctlbyname(c"hw.optional.arm.FEAT_PAuth");
+    let pmull = _sysctlbyname(c"hw.optional.arm.FEAT_PMULL");
+    let rdm = _sysctlbyname(c"hw.optional.arm.FEAT_RDM");
+    let sb = _sysctlbyname(c"hw.optional.arm.FEAT_SB");
     let sha1 = _sysctlbyname(c"hw.optional.arm.FEAT_SHA1");
-    let sha2 = _sysctlbyname(c"hw.optional.arm.FEAT_SHA256");
+    let sha256 = _sysctlbyname(c"hw.optional.arm.FEAT_SHA256");
     let sha3 = _sysctlbyname(c"hw.optional.arm.FEAT_SHA3");
     let sha512 = _sysctlbyname(c"hw.optional.arm.FEAT_SHA512");
-    let jsconv = _sysctlbyname(c"hw.optional.arm.FEAT_JSCVT");
+    let sme = _sysctlbyname(c"hw.optional.arm.FEAT_SME");
+    let sme2 = _sysctlbyname(c"hw.optional.arm.FEAT_SME2");
+    let sme_f64f64 = _sysctlbyname(c"hw.optional.arm.FEAT_SME_F64F64");
+    let sme_i16i64 = _sysctlbyname(c"hw.optional.arm.FEAT_SME_I16I64");
+    let ssbs = _sysctlbyname(c"hw.optional.arm.FEAT_SSBS");
+    let wfxt = _sysctlbyname(c"hw.optional.arm.FEAT_WFxT");
+
+    // The following features are not exposed by `is_aarch64_feature_detected`,
+    // but *are* reported by `sysctl`. They are here as documentation that they
+    // exist, and may potentially be exposed later.
+    /*
+    let afp = _sysctlbyname(c"hw.optional.arm.FEAT_AFP");
+    let csv2 = _sysctlbyname(c"hw.optional.arm.FEAT_CSV2");
+    let csv3 = _sysctlbyname(c"hw.optional.arm.FEAT_CSV3");
+    let fpac = _sysctlbyname(c"hw.optional.arm.FEAT_FPAC");
+    let pauth2 = _sysctlbyname(c"hw.optional.arm.FEAT_PAuth2");
+    let rpres = _sysctlbyname(c"hw.optional.arm.FEAT_RPRES");
+    let specres = _sysctlbyname(c"hw.optional.arm.FEAT_SPECRES");
+     */
 
+    // The following "features" are reported by `sysctl` but are mandatory parts
+    // of SME or SME2, and so are not exposed separately by
+    // `is_aarch64_feature_detected`.  They are here to document their
+    // existence, in case they're needed in the future.
+    /*
+    let sme_b16f32 = _sysctlbyname(c"hw.optional.arm.SME_B16F32");
+    let sme_bi32i32 = _sysctlbyname(c"hw.optional.arm.SME_BI32I32");
+    let sme_f16f32 = _sysctlbyname(c"hw.optional.arm.SME_F16F32");
+    let sme_f32f32 = _sysctlbyname(c"hw.optional.arm.SME_F32F32");
+    let sme_i16i32 = _sysctlbyname(c"hw.optional.arm.SME_I16I32");
+    let sme_i8i32 = _sysctlbyname(c"hw.optional.arm.SME_I8I32");
+     */
+
+    enable_feature(Feature::aes, aes && pmull);
     enable_feature(Feature::asimd, asimd);
-    enable_feature(Feature::pmull, pmull);
-    enable_feature(Feature::fp, fp);
-    enable_feature(Feature::fp16, fp16);
+    enable_feature(Feature::bf16, bf16);
+    enable_feature(Feature::bti, bti);
     enable_feature(Feature::crc, crc);
-    enable_feature(Feature::lse, lse);
-    enable_feature(Feature::lse2, lse2);
-    enable_feature(Feature::rdm, rdm);
-    enable_feature(Feature::rcpc, rcpc);
-    enable_feature(Feature::rcpc2, rcpc2);
+    enable_feature(Feature::dit, dit);
     enable_feature(Feature::dotprod, dotprod);
-    enable_feature(Feature::fhm, fhm);
-    enable_feature(Feature::flagm, flagm);
-    enable_feature(Feature::ssbs, ssbs);
-    enable_feature(Feature::sb, sb);
-    enable_feature(Feature::paca, paca);
     enable_feature(Feature::dpb, dpb);
     enable_feature(Feature::dpb2, dpb2);
+    enable_feature(Feature::ecv, ecv);
+    enable_feature(Feature::fcma, fcma);
+    enable_feature(Feature::fhm, fhm);
+    enable_feature(Feature::flagm, flagm);
+    enable_feature(Feature::flagm2, flagm2);
+    enable_feature(Feature::fp, fp);
+    enable_feature(Feature::fp16, fp16);
     enable_feature(Feature::frintts, frintts);
     enable_feature(Feature::i8mm, i8mm);
-    enable_feature(Feature::bf16, bf16);
-    enable_feature(Feature::bti, bti);
-    enable_feature(Feature::fcma, fcma);
-    enable_feature(Feature::aes, aes && pmull);
     enable_feature(Feature::jsconv, jsconv);
-    enable_feature(Feature::sha2, sha1 && sha2 && asimd);
+    enable_feature(Feature::lse, lse);
+    enable_feature(Feature::lse2, lse2);
+    enable_feature(Feature::paca, pauth);
+    enable_feature(Feature::pacg, pauth);
+    enable_feature(Feature::pmull, aes && pmull);
+    enable_feature(Feature::rcpc, rcpc);
+    enable_feature(Feature::rcpc2, rcpc2);
+    enable_feature(Feature::rdm, rdm);
+    enable_feature(Feature::sb, sb);
+    enable_feature(Feature::sha2, sha1 && sha256 && asimd);
     enable_feature(Feature::sha3, sha512 && sha3 && asimd);
+    enable_feature(Feature::sme, sme);
+    enable_feature(Feature::sme2, sme2);
+    enable_feature(Feature::sme_f64f64, sme_f64f64);
+    enable_feature(Feature::sme_i16i64, sme_i16i64);
+    enable_feature(Feature::ssbs, ssbs);
+    enable_feature(Feature::wfxt, wfxt);
 
     value
 }