macro_rules! is_powerpc_feature_detected {
    ("altivec") => { ... };
    ("vsx") => { ... };
    ("power8") => { ... };
    ($t:tt,) => { ... };
    ($t:tt) => { ... };
}
🔬This is a nightly-only experimental API. (stdsimd #27731)
Available on PowerPC only.
Expand description

检查是否启用了 powerpc 特性。