InvSqrt

Function InvSqrt

The InvSqrt function computes an inverse square root 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	3.85	7.69	5.14
	LA	2.21	2.21	5.14
	EP	1.29	1.27	5.14
double	HA	13.42	11.72	6.36
	LA	11.17	9.67	6.16
	EP	11.16	9.67	6.16

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	0.73	0.73	0.50
	LA	2.83	2.83	0.50
	EP	4.69E+03	4.69E+03	0.50
double	HA	0.50	0.50	0.50
	LA	0.97	0.97	0.50
	EP	0.97	0.97	0.50

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

Performance Graphs:

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