_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.

Note iconNote

Many routines in the svml library are more highly optimized for Intel® microprocessors than for non-Intel microprocessors.
Parent topic: Intrinsics for Square Root and Cube Root Operations

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