# [−][src]Function core::arch::wasm32::f64x2_extract_lane

    pub unsafe fn f64x2_extract_lane(a: v128, imm: usize) -> f64

🔬 This is a nightly-only experimental API. (`stdsimd` #48556)
This is supported on WebAssembly only.

Extracts lane from a 128-bit vector interpreted as 2 packed f64 numbers.

Extracts the scalar value of lane specified in the immediate mode operand `imm` from `a`.

# Unsafety

This function has undefined behavior if `imm` is greater than or equal to 2.