Div

Function Div

The Div function performs element by element division.

Performance:

	Default processor	Pentium® III processor	Pentium® 4 processor	Itanium® processor
vsDiv (HA version)	14.5	10.9	9.8	4.2
vdDiv (HA version)	16.2	16.4	11.8	5.3

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
vsDiv (HA version)	0.50	0.50	0.50	0.50
vdDiv (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
vsDiv/vdDiv (HA version)	0, 0	NaN (Raise DZ Exeption)	+	+	+	+
	NaN (Both QNaN and SNaN)	NaN (Raise Invalid Exeption for SNaN)	+	+	+	+
	0 / (+/-)Inf	0	+	+	+	+
	(+/-)Inf / (+/-)Inf	NaN (Raise DZ Exeption)	+	+	+	+
	(+/-)Inf / 0	(+/-)Inf	+	+	+	+
	x / x for all non-special x	1	+	+	+	+

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