Developer Reference
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Atanpi
Computes the inverse tangent of vector elements 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 | 21.95 | 9.04 | 7.50 | 4.87 |
LA | 9.03 | 2.79 | 2.52 | 1.50 | |
EP | 2.72 | 2.14 | 1.85 | 1.13 | |
double | HA | 18.42 | 16.51 | 13.68 | 10.30 |
LA | 12.86 | 11.02 | 9.30 | 6.72 | |
EP | 8.92 | 8.71 | 7.11 | 4.15 |
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 | 1.00 | 1.00 | 1.00 | 1.00 |
LA | 3.27 | 3.27 | 3.27 | 2.63 | |
EP | 3.77E+03 | 3.77E+03 | 3.77E+03 | 3.77E+03 | |
double | HA | 0.83 | 0.83 | 0.83 | 0.86 |
LA | 2.85 | 2.85 | 2.85 | 2.87 | |
EP | 2.18E+07 | 2.18E+07 | 2.18E+07 | 2.16E+07 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Trigonometric Functions