Developer Reference for Intel® oneAPI Math Kernel Library for C
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v?Trunc
Computes an integer value rounded towards zero for each vector element.
Syntax
vsTrunc( n, a, y );
vsTruncI(n, a, inca, y, incy);
vmsTrunc( n, a, y, mode );
vmsTruncI(n, a, inca, y, incy, mode);
vdTrunc( n, a, y );
vdTruncI(n, a, inca, y, incy);
vmdTrunc( n, a, y, mode );
vmdTruncI(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 vsTrunc, vmsTrunc const double* for vdTrunc, vmdTrunc |
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. |
Output Parameters
Name |
Type |
Description |
---|---|---|
y |
float* for vsTrunc, vmsTrunc double* for vdTrunc, vmdTrunc |
Pointer to an array that contains the output vector y. |
Description
The function computes an integer value rounded towards zero for each vector element.

Argument | Result | Exception |
---|---|---|
+0 | +0 | |
-0 | -0 | |
+∞ | +∞ | |
-∞ | -∞ | |
SNAN | QNAN | INVALID |
QNAN | QNAN |