Ln

Function Ln

The Ln function computes computes a natural logarithm of real 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	11.25	10.19	5.14
	LA	9.29	8.42	5.14
	EP	5.35	5.34	5.14
double	HA	21.02	16.24	6.18
	LA	17.78	16.09	6.18
	EP	17.78	16.09	6.18

Notes:
1) Units - CPE (Clocks per Element)
2) Performance was measured on "working" interval (double precision: [0.1, 10000.0]; single precision: [0.1, 10000.0])
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	0.88	0.88	0.50
	EP	111.00	111.00	0.50
double	HA	0.55	0.55	0.50
	LA	0.55	0.55	0.50
	EP	0.55	0.55	0.50

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

Performance Graphs:

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