Function core::arch::x86::_mm_rsqrt14_sd[][src]

pub unsafe fn _mm_rsqrt14_sd(a: __m128d, b: __m128d) -> __m128d
🔬 This is a nightly-only experimental API. (stdsimd #48556)
This is supported on x86 and target feature avx512f only.
Expand description

计算 b 中较低的双精度 (64-bit) 浮点元素的近似倒数平方根,将结果存储在 dst 的较低元素中,并将较高的元素从 a 复制到 dst 的较高元素。该近似值的最大相对误差小于 2^-14。

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