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?Rint

Computes a rounded integer value in the current rounding mode.

Syntax

call vsrint( n, a, y )

call vsrinti(n, a, inca, y, incy)

call vmsrint( n, a, y, mode )

call vmsrinti(n, a, inca, y, incy, mode)

call vdrint( n, a, y )

call vdrinti(n, a, inca, y, incy)

call vmdrint( n, a, y, mode )

call vmdrinti(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 vdrint, vmdrint

REAL, INTENT(IN) for vsrint, vmsrint

DOUBLE PRECISION, INTENT(IN) for vdrint, vmdrint

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 vdrint, vmdrint

REAL, INTENT(OUT) for vsrint, vmsrint

DOUBLE PRECISION, INTENT(OUT) for vdrint, vmdrint

Array that specifies the output vector y.

Description

The v?Rint function computes a rounded floating-point integer value using the current rounding mode for each vector element.

The rounding mode affects the results computed for inputs that fall between consecutive integers. For example:

  • f(0.5) = 0, for rounding modes set to round to nearest round toward zero or to minus infinity.

  • f(0.5) = 1, for rounding modes set to plus infinity.

  • f(-1.5) = -2, for rounding modes set to round to nearest or to minus infinity.

  • f(-1.5) = -1, for rounding modes set to round toward zero or to plus infinity.

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