Function Acos

 

The Acos function computes an inverse cosine of real vector elements.

 

Performance:

Dual-Core
 Intel(R) Xeon(R) processor 5100 Series
 45nm Intel(R)
Core(TM)2 Duo processor
Intel(R) Itanium(R) 2 processor
single HA 12.06 12.51 12.80
LA 8.85 8.06 12.80
EP 6.57 7.10 12.80
double HA 21.28 18.38 11.02
LA 12.38 17.00 11.02
EP 12.38 17.00 11.02

Notes:
1) Units - CPE (Clocks per Element)
2) Performance was measured on "working" interval (double precision: [ -1, 1 ]; single precision: [ -1, 1 ])
3) Data - vectors of 1000 elements with random generated numbers.

 

Accuracy:

Dual-Core
 Intel(R) Xeon(R) processor 5100 Series
 45nm Intel(R)
Core(TM)2 Duo processor
Intel(R) Itanium(R) 2 processor
single HA 0.71 0.71 0.50
LA 2.34 2.34 0.50
EP 622.00 622.00 0.50
double HA 0.71 0.71 0.50
LA 2.87 2.87 0.50
EP 2.87 2.87 0.50

Note: Units - ULP (Units in The Last Place).

 

 

Performance Graphs:

     

 

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