E0511 - Error codes index
Description: Book listing all Rust error codes

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# Error code E0511

Invalid monomorphization of an intrinsic function was used.

Erroneous code example:

    #![feature(intrinsics)]

    #[rustc_intrinsic]
    unsafe fn simd_add<T>(a: T, b: T) -> T;

    fn main() {
        unsafe { simd_add(0, 1); }
        // error: invalid monomorphization of `simd_add` intrinsic
    }

The generic type has to be a SIMD type. Example:

    #![allow(unused)]
    #![feature(repr_simd)]
    #![feature(intrinsics)]

    fn main() {
    #[repr(simd)]
    #[derive(Copy, Clone)]
    struct i32x2([i32; 2]);

    #[rustc_intrinsic]
    unsafe fn simd_add<T>(a: T, b: T) -> T;

    unsafe { simd_add(i32x2([0, 0]), i32x2([1, 2])); } // ok!
    }