Developer Reference
Visible to Intel only — GUID: GUID-139E903B-1FC7-41CF-8D72-76625D6FB52C
Atan
Computes an inverse tangent of real vector elements.
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 | 8.32 | 5.44 | 4.93 | 1.59 |
LA | 3.64 | 2.17 | 1.82 | 1.24 | |
EP | 1.75 | 1.50 | 1.34 | 0.82 | |
double | HA | 17.02 | 13.30 | 11.57 | 3.53 |
LA | 9.49 | 8.17 | 6.84 | 2.97 | |
EP | 6.12 | 5.13 | 4.45 | 2.17 |
Notes:
- Units - CPE (Clocks per Element)
Performance was measured on "working" interval (double precision: [ -5.0, 5.0 ]; single precision: [ -5.0, 5.0 ])
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 | 0.72 | 0.72 | 0.72 | 0.50 |
LA | 1.81 | 1.56 | 1.56 | 1.00 | |
EP | 3.77E+03 | 3.77E+03 | 3.77E+03 | 3.77E+03 | |
double | HA | 0.63 | 0.64 | 0.64 | 0.53 |
LA | 1.87 | 1.87 | 1.87 | 1.87 | |
EP | 1.96E+07 | 1.96E+07 | 1.96E+07 | 1.96E+07 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Trigonometric Functions