Developer Reference for Intel® oneAPI Math Kernel Library for C

ID 766684
Date 3/31/2023
Public

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Document Table of Contents

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.



Special Values for Real Function v?Trunc(x)
Argument Result Exception
+0 +0  
-0 -0  
+ +  
- -  
SNAN QNAN INVALID
QNAN QNAN