Developer Reference
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InvSqrt
Computes an inverse square root 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 | 1.32 | 0.92 | 0.79 | 0.51 |
LA | 1.32 | 0.64 | 0.54 | 0.42 | |
EP | 0.86 | 0.64 | 0.54 | 0.22 | |
double | HA | 5.39 | 3.57 | 3.05 | 1.10 |
LA | 5.19 | 3.57 | 3.02 | 0.93 | |
EP | 4.38 | 3.29 | 2.69 | 0.77 |
Notes:
- Units - CPE (Clocks per Element)
Performance was measured on "working" interval (double precision: [ 0.1, 10000.0 ]; single precision: [ 0.1, 10000.0 ])
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 | 0.77 | 0.50 | 0.50 | 0.55 |
LA | 2.74 | 2.72 | 2.72 | 0.89 | |
EP | 2.74 | 2.72 | 2.72 | 857.00 | |
double | HA | 0.52 | 0.52 | 0.52 | 0.62 |
LA | 1.55 | 1.42 | 1.42 | 1.06 | |
EP | 2.76E+05 | 2.76E+05 | 2.76E+05 | 3.56E+07 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Root