Developer Reference for Intel® oneAPI Math Kernel Library for Fortran
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v?Expm1
Computes an exponential of vector elements decreased by 1.
Syntax
call vsexpm1( n, a, y )
call vsexpm1i(n, a, inca, y, incy)
call vmsexpm1( n, a, y, mode )
call vmsexpm1i(n, a, inca, y, incy, mode)
call vdexpm1( n, a, y )
call vdexpm1i(n, a, inca, y, incy)
call vdexpm1( n, a, y, mode )
call vmdexpm1i(n, a, inca, y, incy, mode)
Include Files
- mkl_vml.f90
Input Parameters
Name |
Type |
Description |
---|---|---|
n |
INTEGER, INTENT(IN) |
Specifies the number of elements to be calculated. |
a |
DOUBLE PRECISION for vdexpm1, vmdexpm1 REAL, INTENT(IN) for vsexpm1, vmsexpm1 DOUBLE PRECISION, INTENT(IN) for vdexpm1, vmdexpm1 |
Array that specifies the input vector a. |
inca, incy |
INTEGER, INTENT(IN) |
Specifies increments for the elements of a and y. |
mode |
INTEGER(KIND=8), INTENT(IN) |
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 |
DOUBLE PRECISION for vdexpm1, vmdexpm1 REAL, INTENT(OUT) for vsexpm1, vmsexpm1 DOUBLE PRECISION, INTENT(OUT) for vdexpm1, vmdexpm1 |
Array that specifies 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 |