Developer Reference for Intel® oneAPI Math Kernel Library for C
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v?Expm1
Computes an exponential of vector elements decreased by 1.
Syntax
vsExpm1( n, a, y );
vsExpm1I(n, a, inca, y, incy);
vmsExpm1( n, a, y, mode );
vmsExpm1I(n, a, inca, y, incy, mode);
vdExpm1( n, a, y );
vdExpm1I(n, a, inca, y, incy);
vmdExpm1( n, a, y, 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. |
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.
Argument | Result | VM Error Status | Exception |
---|---|---|---|
+0 | +0 | ||
-0 | +0 | ||
X > overflow | +∞ | VML_STATUS_OVERFLOW | OVERFLOW |
+∞ | +∞ | ||
-∞ | -1 | ||
QNAN | QNAN | ||
SNAN | QNAN | INVALID |