Macro std::is_x86_feature_detected

macro_rules! is_x86_feature_detected {
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($feature_lit) => { ... };
    ($bind_feature) => { ... };
    ($t:tt,) => { ... };
    ($t:tt) => { ... };
}

一个在 运行时 测试 x86/x86-64 平台上是否具有 CPU 功能的宏。

标准库中提供了此宏，它将在运行时检测是否检测到指定的 CPU 功能。

除非在整个 crate 中启用了指定功能，否则在编译时不会解析。 当前，运行时检测主要依赖于 cpuid 指令。

该宏仅使用一个参数，该参数是要测试的功能的字符串字面量。 支持的功能名称是 their 文档 中 Intel 定义的功能的小写版本。

支持参数

该宏支持 #[target_feature] 支持的相同名称。 但是，与 #[target_feature] 不同，此宏不支持用逗号分隔的名称。 相反，针对多个功能的测试目前必须通过单独的宏调用来完成。

支持的参数有:

• "aes"
• "pclmulqdq"
• "rdrand"
• "rdseed"
• "tsc"
• "mmx"
• "sse"
• "sse2"
• "sse3"
• "ssse3"
• "sse4.1"
• "sse4.2"
• "sse4a"
• "sha"
• "avx"
• "avx2"
• "avx512f"
• "avx512cd"
• "avx512er"
• "avx512pf"
• "avx512bw"
• "avx512dq"
• "avx512vl"
• "avx512ifma"
• "avx512vbmi"
• "avx512vpopcntdq"
• "avx512vbmi2"
• "avx512gfni"
• "avx512vaes"
• "avx512vpclmulqdq"
• "avx512vnni"
• "avx512bitalg"
• "avx512bf16"
• "avx512vp2intersect"
• "f16c"
• "fma"
• "bmi1"
• "bmi2"
• "abm"
• "lzcnt"
• "tbm"
• "popcnt"
• "fxsr"
• "xsave"
• "xsaveopt"
• "xsaves"
• "xsavec"
• "cmpxchg16b"
• "adx"
• "rtm"