Developer Reference
Visible to Intel only — GUID: GUID-AE16D238-1B23-4F61-AE42-57256FA88583
Acospi
Computes the inverse cosine 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 | 3.55 | 2.74 | 2.68 | 1.79 |
LA | 2.81 | 1.98 | 1.78 | 1.21 | |
EP | 2.79 | 1.87 | 1.59 | 0.91 | |
double | HA | 9.98 | 7.43 | 6.83 | 3.84 |
LA | 8.23 | 7.12 | 6.02 | 3.70 | |
EP | 6.21 | 4.82 | 4.27 | 2.59 |
Notes:
- Units - CPE (Clocks per Element)
Performance was measured on "working" interval (double precision: [ -1.0, 1.0 ]; single precision: [ -1.0, 1.0 ])
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 | 0.79 | 0.79 | 0.79 | 0.95 |
LA | 2.46 | 2.46 | 2.46 | 2.46 | |
EP | 531.57 | 531.57 | 531.57 | 531.57 | |
double | HA | 0.80 | 0.80 | 0.80 | 0.80 |
LA | 2.23 | 2.23 | 2.23 | 2.23 | |
EP | 4.85E+06 | 4.85E+06 | 4.85E+06 | 4.48E+06 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Trigonometric Functions