Developer Reference for Intel® oneAPI Math Kernel Library for Fortran
v?Trunc
vsTrunc vmsTrunc vdTrunc vmdTrunc Computes an integer value rounded towards zero for each vector element.
Syntax
call vstrunc ( n , a , y )
call vstrunci(n, a, inca, y, incy)
call vmstrunc ( n , a , y , mode )
call vmstrunci(n, a, inca, y, incy, mode)
call vdtrunc ( n , a , y )
call vdtrunci(n, a, inca, y, incy)
call vmdtrunc ( n , a , y , mode )
call vmdtrunci(n, a, inca, y, incy, mode)
Include Files
mkl_vml.f90
Input Parameters
Name |
Type |
Description |
|---|---|---|
n |
Specifies the number of elements to be calculated. |
|
a |
Fortran 77: DOUBLE PRECISION for vdTrunc , vmdTruncFortran 90: REAL , INTENT(IN) for vsTrunc , vmsTruncFortran 90: DOUBLE PRECISION , INTENT(IN) for vdTrunc , vmdTrunc |
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 (Sets a new mode for VM functions according to the mode parameter and stores the previous VM mode to oldmode.) for possible values and their description. |
Output Parameters
Name |
Type |
Description |
|---|---|---|
y |
Fortran 77: DOUBLE PRECISION for vdTrunc , vmdTruncFortran 90: REAL , INTENT(OUT) for vsTrunc , vmsTruncFortran 90: DOUBLE PRECISION , INTENT(OUT) for vdTrunc , vmdTrunc |
Array that specifies the output vector y . |
Description
The function computes an integer value rounded towards zero for each vector element.
Special Values for Real Function v?Trunc(x)
Argument |
Result |
Exception |
|---|---|---|
+0 |
+0 |
|
-0 |
-0 |
|
|
|
|
|
|
|
SNAN |
QNAN |
INVALID |
QNAN |
QNAN |