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); |
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]) ...
Note
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.
Parent topic: Intrinsics for Trigonometric Operations
Inglés