Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 6/24/2024
Public

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v?i1

Computes the regular modified cylindrical Bessel function of vector elements.

Syntax

call vsi1( n, a, y )
call vsi1i(n, a, inca, y, incy)
call vmsi1( n, a, y, mode )
call vmsi1i(n, a, inca, y, incy, mode)
call vdi1( n, a, y )
call vdi1i(n, a, inca, y, incy)
call vmdi1( n, a, y, mode )
call vmdi1i(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

REAL, INTENT(IN) for vsi1, vmsi1

DOUBLE PRECISION, INTENT(IN) for vdi1, vmdi1

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

REAL, INTENT(OUT) for vsi1, vmsi1

DOUBLE PRECISION, INTENT(OUT) for vdi1, vmdi1

Array that specifies the output vector y.

Description

The I1 function computes the regular modified cylindrical Bessel function of order 1 for elements of the input vector a and writes them to the output vector y.

Special Values for Real Function v?i1(x)
Argument Result VM Error Status Exception
+0 +0    
-0 +0    
+ +    
- -    
QNAN QNAN    
SNAN QNAN   INVALID