v?Expm1

Computes an exponential of vector elements decreased by 1.

Syntax

vsExpm1

(

)

;

vsExpm1I(n, a, inca, y, incy);

vmsExpm1

(

mode

)

;

vmsExpm1I(n, a, inca, y, incy, mode);

vdExpm1

(

)

;

vdExpm1I(n, a, inca, y, incy);

vmdExpm1

(

mode

)

;

vmdExpm1I(n, a, inca, y, incy, mode);

Include Files

mkl.h

Input Parameters

Name	Type	Description
n	`const MKL_INT`	Specifies the number of elements to be calculated.
a	`const float` for vsExpm1 , vmsExpm1 `const double` for vdExpm1 , vmdExpm1	Pointer to an array that contains the input vector a .
inca , incy	const MKL_INT	Specifies increments for the elements of `a` and `y`.
mode	`const MKL_INT64`	Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Precision Overflow Thresholds for
Expm1
Function
Data Type	Threshold Limitations on Input Parameters
single precision	`a`[i] < Ln( FLT_MAX )
double precision	`a`[i] < Ln( DBL_MAX )

Output Parameters

Name	Type	Description
y	`float` for vsExpm1 , vmsExpm1 `double` for vdExpm1 , vmdExpm1	Pointer to an array that contains the output vector y .

Description

The

v?Expm1

function computes an exponential of vector elements decreased by 1.

Special Values for Real Function
v?Expm1(x)
Argument	Result	VM Error Status	Exception
+0	+0
-0	+0
X > overflow	+ ∞	VML_STATUS_OVERFLOW	OVERFLOW
+ ∞	+ ∞
- ∞	-1
QNAN	QNAN
SNAN	QNAN		INVALID

In This Topic

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.