Function std::intrinsics::powif32

pub unsafe extern "rust-intrinsic" fn powif32(a: f32, x: i32) -> f32

🔬 This is a nightly-only experimental API. (core_intrinsics)

intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library

将 f32 提升为整数幂。

此内联函数的稳定版本是 f32::powi