Log1p

Function Log1p

The Log1p function computes natural logarithm of vector elements that are increased by 1.

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	37.55	37.13	147.57
	LA	37.52	37.13	147.52
	EP	36.94	35.88	147.52
double	HA	38.27	37.60	141.21
	LA	38.27	37.60	140.66
	EP	38.19	37.60	140.64

Notes:
1) Units - CPE (Clocks per Element)
2) Performance was measured on "working" interval (double precision: [1.0, 999.0]; single precision: [1.0, 999.0])
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	0.50	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:

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