Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 7/13/2023
Public

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Document Table of Contents

v?Trunc

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

INTEGER, INTENT(IN)

Specifies the number of elements to be calculated.

a

DOUBLE PRECISION for vdTrunc, vmdTrunc

REAL, INTENT(IN) for vsTrunc, vmsTrunc

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 for possible values and their description.

Output Parameters

Name

Type

Description

y

DOUBLE PRECISION for vdTrunc, vmdTrunc

REAL, INTENT(OUT) for vsTrunc, vmsTrunc

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