================
@@ -1259,6 +1270,64 @@ struct {
// As features grows new fields could be added
} __aarch64_cpu_features __attribute__((visibility("hidden"), nocommon));
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#if TARGET_OS_OSX || TARGET_OS_IPHONE
+#include <dispatch/dispatch.h>
+#include <sys/sysctl.h>
+
+static bool isKnownAndSupported(const char *name) {
+ int32_t val = 0;
+ size_t size = sizeof(val);
+ if (sysctlbyname(name, &val, &size, NULL, 0))
+ return false;
+ return val;
+}
+
+void __init_cpu_features_resolver(void) {
+ static dispatch_once_t onceToken = 0;
+ dispatch_once(&onceToken, ^{
+ //
https://developer.apple.com/documentation/kernel/1387446-sysctlbyname/determining_instruction_set_characteristics
+ static struct {
+ const char *sysctl_name;
+ enum CPUFeatures feature;
+ } Features[] = {
+ {"hw.optional.arm.FEAT_FlagM", FEAT_FLAGM},
+ {"hw.optional.arm.FEAT_FlagM2", FEAT_FLAGM2},
+ {"hw.optional.arm.FEAT_FHM", FEAT_FP16FML},
+ {"hw.optional.arm.FEAT_DotProd", FEAT_DOTPROD},
+ {"hw.optional.arm.FEAT_RDM", FEAT_RDM},
+ {"hw.optional.arm.FEAT_LSE", FEAT_LSE},
+ {"hw.optional.floatingpoint", FEAT_FP},
+ {"hw.optional.AdvSIMD", FEAT_SIMD},
+ {"hw.optional.armv8_crc32", FEAT_CRC},
+ {"hw.optional.arm.FEAT_SHA1", FEAT_SHA1},
+ {"hw.optional.arm.FEAT_SHA256", FEAT_SHA2},
+ {"hw.optional.armv8_2_sha3", FEAT_SHA3},
+ {"hw.optional.arm.FEAT_AES", FEAT_AES},
+ {"hw.optional.arm.FEAT_PMULL", FEAT_PMULL},
+ {"hw.optional.arm.FEAT_FP16", FEAT_FP16},
+ {"hw.optional.arm.FEAT_JSCVT", FEAT_JSCVT},
+ {"hw.optional.arm.FEAT_FCMA", FEAT_FCMA},
+ {"hw.optional.arm.FEAT_LRCPC", FEAT_RCPC},
+ {"hw.optional.arm.FEAT_LRCPC2", FEAT_RCPC2},
+ {"hw.optional.arm.FEAT_FRINTTS", FEAT_FRINTTS},
+ {"hw.optional.arm.FEAT_I8MM", FEAT_I8MM},
+ {"hw.optional.arm.FEAT_BF16", FEAT_BF16},
+ {"hw.optional.arm.FEAT_SB", FEAT_SB},
+ {"hw.optional.arm.FEAT_SSBS", FEAT_SSBS2},
+ {"hw.optional.arm.FEAT_BTI", FEAT_BTI},
+ };
+
+ for (size_t I = 0, E = sizeof(Features) / sizeof(Features[0]); I != E; ++I)
----------------
MaskRay wrote:
compiler-rt generally uses lower-case variable names.
https://github.com/llvm/llvm-project/pull/73685
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