Developer Reference
Visible to Intel only — GUID: GUID-3F03213A-48EB-41F3-B42F-3339DD513BA5
Atan2
Computes a four-quadrant inverse tangent of vector elements of two real vectors.
Performance:
Intel® Xeon® Processor E5-2680 | Intel® Xeon® Processor E5-2699 v3 | Intel® Xeon® Processor E5-2699 v4 | Intel® Xeon® Gold 6148 Processor | ||
---|---|---|---|---|---|
single | HA | 31.82 | 7.52 | 6.41 | 2.76 |
LA | 14.07 | 3.35 | 2.96 | 1.90 | |
EP | 3.65 | 2.88 | 2.53 | 1.15 | |
double | HA | 25.39 | 18.66 | 15.50 | 5.73 |
LA | 16.05 | 11.37 | 9.31 | 5.11 | |
EP | 10.54 | 9.77 | 8.54 | 3.43 |
Notes:
- Units - CPE (Clocks per Element)
Performance was measured on "working" interval (double precision: [ -10000.0, 10000.0 ] × [ -18000.0, 18000.0 ]; single precision: [ -10000.0, 10000.0 ] × [ -18000.0, 18000.0 ])
Data - vectors of 1000 elements with random generated numbers.
All data was collected with 64-bit libraries.
Accuracy:
Intel® Xeon® Processor E5-2680 | Intel® Xeon® Processor E5-2699 v3 | Intel® Xeon® Processor E5-2699 v4 | Intel® Xeon® Gold 6148 Processor | ||
---|---|---|---|---|---|
single | HA | 0.75 | 0.75 | 0.75 | 0.75 |
LA | 2.59 | 2.57 | 2.57 | 2.57 | |
EP | 3.70E+03 | 3.70E+03 | 3.70E+03 | 3.70E+03 | |
double | HA | 0.74 | 0.74 | 0.74 | 0.74 |
LA | 2.14 | 1.81 | 1.81 | 1.81 | |
EP | 2.03E+07 | 2.03E+07 | 2.03E+07 | 2.03E+07 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Trigonometric Functions