Acos

Function Acos

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

Performance:

		Intel(R) Xeon(R) processor 5100 Series	45nm Intel(R) Core(TM)2 Duo Processor	Intel(R) Itanium(R) 2 processor
single	HA	1.27E+03	1.22E+03	1.52E+03
	LA	1.27E+03	1.12E+03	1.52E+03
	EP	1.27E+03	1.12E+03	1.52E+03
double	HA	1.24E+03	1.10E+03	1.48E+03
	LA	1.24E+03	1.10E+03	1.48E+03
	EP	1.24E+03	1.10E+03	1.48E+03

Notes:
1) Units - CPE (Clocks per Element)
2) Performance was measured on "working" interval (double precision: [0.01, 20.00] × [0.01, 20.00]; single precision: [0.01, 20.00] × [0.01, 20.00])
3) Data - vectors of 1000 elements with random generated numbers.

Accuracy:

		Intel(R) Xeon(R) processor 5100 Series	45nm Intel(R) Core(TM)2 Duo Processor	Intel(R) Itanium(R) 2 processor
single	HA	0.50	0.50	0.50
	LA	0.50	0.50	0.50
	EP	0.50	0.50	0.50
double	HA	0.50	0.50	0.50
	LA	0.50	0.50	0.50
	EP	0.50	0.50	0.50

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

Performance Graphs:

Legal Information