Cbrt

Function Cbrt

The Cbrt function computes a cube root.

Performance:

	Default processor	Pentium® III processor	Pentium® 4 processor	Itanium® processor
vsCbrt (HA version)	32.1	32.0	22.4	7.2
vdCbrt (HA version)	45.3	45.4	40.6	10.4

Notes:
1) Units - CPE (Clocks per Element)
2) Performance was measured on "working" interval (double precision: [0,10000]; single precision: [0,10000])
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
vsCbrt (HA version)	0.59	0.59	0.91	0.51
vdCbrt (HA version)	0.69	0.69	0.52	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
vsCbrt/vdCbrt (HA version)	+/- 0	+/- 0	+	+	+	+
	NaN (Both QNaN and SNaN)	NaN (Raise Invalid Exeption for SNaN)	+	+	+	+
	+/- Inf	+/- Inf	+	+	+	+

Intel, Pentium, Pentium III, Pentium 4, and Itanium are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries.