Inv

Function Inv

The Inv function performs element by element inversion.

Performance:

	Default processor	Pentium® III processor	Pentium® 4 processor	Itanium® processor
vsInv (HA version)	10.0	10.1	9.9	3.1
vdInv (HA version)	11.2	11.3	11.7	4.3

Notes:
1) Units - CPE (Clocks per Element)
2) Performance was measured on "working" interval (double precision: [-10000,10000]; single precision: [-10000,10000])
3) Data - vectors of 1000 elements with random generated numbers
4) "Default" means X87 code for all IA-32 processors
5) Performance of "default" version was measured on Pentium® III processor

Notes:
1) *        X87 code for all processors
2) **      Pentium® III processor
3) ***    Pentium® 4 processor
4) **** Itanium® processor
5) Logarithmic scale is used for "Vectors Size" axis

Maximal observed error for the whole function domain:

	Default processor	Pentium® III processor	Pentium® 4 processor	Itanium® processor
vsInv (HA version)	0.50	0.50	0.50	0.50
vdInv (HA version)	0.50	0.50	0.50	0.50

Notes:
1) Units - ULP (Units in The Last Place)

Special values:

Function	Input Argument	Result	Default processor	Pentium® III processor	Pentium® 4 processor	Itanium® processor
vsInv/vdInv (HA version)	0	+ Inf (Raise DZ Exeption)	+	+	+	+
	NaN (Both QNaN and SNaN)	NaN (Raise Invalid Exeption for SNaN)	+	+	+	+
	1	1	+	+	+	+
	2	1/2	+	+	+	+

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