Developer Reference
Visible to Intel only — GUID: GUID-96053EA3-C64A-4810-A7EF-D823B44A8C6F
Atan2pi
Computes the four-quadrant inverse tangent of the ratios of the corresponding elementss of two vectors divided by π.
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 | 10.57 | 10.93 | 8.82 | 5.58 |
LA | 6.14 | 3.57 | 3.33 | 2.05 | |
EP | 4.07 | 2.80 | 2.50 | 1.31 | |
double | HA | 24.45 | 19.10 | 15.81 | 9.90 |
LA | 16.52 | 13.88 | 11.88 | 7.67 | |
EP | 11.66 | 10.81 | 9.39 | 4.89 |
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 | 0.83 | 0.82 | 0.82 | 0.82 |
LA | 2.61 | 2.88 | 2.88 | 2.58 | |
EP | 3.77E+03 | 3.77E+03 | 3.77E+03 | 3.77E+03 | |
double | HA | 0.85 | 0.85 | 0.85 | 0.92 |
LA | 3.37 | 3.37 | 3.37 | 3.60 | |
EP | 2.19E+07 | 2.19E+07 | 2.19E+07 | 2.16E+07 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Trigonometric Functions