Function vfixupimmpd256

pub(in ::core_arch::x86::avx512f) unsafe extern ""unadjusted"" fn vfixupimmpd256(a: Simd<f64, 4>, b: Simd<f64, 4>, c: Simd<i64, 4>, imm8: i32, mask: u8) -> Simd<f64, 4>