InvCbrt

Function InvCbrt

The InvCbrt function computes an inverse cube root.

Performance:

	Default processor	Pentium® III processor	Pentium® 4 processor	Itanium® processor
vsInvCbrt (HA version)	31.4	31.3	23.4	7.2
vdInvCbrt (HA version)	42.4	42.3	40.8	9.4

Notes:
1) Units - CPE (Clocks per Element)
2) Performance was measured on "working" interval (double precision: [3e-308,10000]; single precision: [2e-38,10000])
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
vsInvCbrt (HA version)	0.83	0.83	0.87	0.50
vdInvCbrt (HA version)	0.61	0.61	0.53	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
vsInvCbrt/vdInvCbrt (HA version)	+/- 0	+/- Inf (Raise DZ Exeption)	+	+	+	+
	NaN (Both QnaN and SNaN)	NaN (Raise Invalid Exeption for SnaN)	+	+	+	+
	+/- Inf	+/- 0	+	+	+	+

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