Developer Reference
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LGamma
Computes the natural logarithm of the absolute value of gamma function for 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 | 40.40 | 44.70 | 35.15 | 41.79 |
LA | 40.39 | 44.69 | 35.15 | 41.78 | |
EP | 40.39 | 44.69 | 35.14 | 41.72 | |
double | HA | 86.17 | 103.57 | 81.53 | 76.29 |
LA | 86.17 | 103.48 | 81.53 | 76.29 | |
EP | 86.15 | 103.48 | 81.53 | 76.29 |
Notes:
- Units - CPE (Clocks per Element)
Performance was measured on "working" interval (double precision: [ 0.00001, 1000.0 ]; single precision: [ 0.00001, 1000.0 ])
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 | 0.50 | 0.50 | 0.50 | 0.50 |
LA | 0.50 | 0.50 | 0.50 | 0.50 | |
EP | 0.50 | 0.50 | 0.50 | 0.50 | |
double | HA | 0.50 | 0.50 | 0.50 | 0.50 |
LA | 0.50 | 0.50 | 0.50 | 0.50 | |
EP | 0.50 | 0.50 | 0.50 | 0.50 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Special