Developer Guide and Reference

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_mm_invsqrt_pd
,
_mm256_invsqrt_pd

Calculates inverse square root value. Vector variant of invsqrt(x) function for a 128-bit/256-bit vector argument of float64 values.

Syntax

extern __m128d _mm_invsqrt_pd(__m128d v1);
extern __m256d _mm256_invsqrt_pd(__m256d v1);
Arguments
v1
vector with float64 values
Description
Calculates the inverse square root of vector
v1
elements.
Returns
128-bit/256-bit vector with the result of the operation.
Many routines in the
svml
library are more optimized for Intel® microprocessors than for non-Intel microprocessors.