# Function core::arch::x86::_mm512_mask_insertf64x4

source ·

    pub unsafe fn _mm512_mask_insertf64x4(
        src: __m512d,
        k: __mmask8,
        a: __m512d,
        b: __m256d,
        const IMM8: i32
    ) -> __m512d

🔬This is a nightly-only experimental API. (`stdsimd` #48556)
Available on (x86 or x86-64) and target feature `avx512f` only.
Expand description

Copy a to tmp, then insert 256 bits (composed of 4 packed double-precision (64-bit) floating-point elements) from b into tmp at the location specified by imm8. Store tmp to dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

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