Developer Guide and Reference

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_mm_atan2_ps
,
_mm256_atan2_ps

Calculates the inverse tangent of float32 variables x and y. Vector variant of atan2(x, y) function for a 128-bit/256-bit vector argument of float32 values.

Syntax

extern __m128 _mm_atan2_ps(__m128 v1, __m128 v2);
extern __m256 _mm256_atan2_ps(__m256 v1, __m256 v2);
Arguments
v1
vector with float32 values
v2
vector with float32 values
Description
Calculates the arc tangent of corresponding float32 elements of vectors
v1
and
v2
. The following is an illustration of the atan2 operation:
Res[0] = atan2(v1[0], v2[0]) Res[1] = atan2(v1[1], v2[1]) Res[2] = atan2(v1[2], v2[2]) Res[15] = atan2(v1[15], v2[15]) ...
This calculation is similar to calculating the arc tangent of
y / x
, except that the signs of both arguments are used to determine the quadrant of the result.
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.