Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 12/16/2022
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

v?Exp2

Computes the base 2 exponential of vector elements.

Syntax

call vsexp2 (n, a, y)

call vsexp2i(n, a, inca, y, incy)

call vmsexp2 (n, a, y, mode)

call vmsexp2i(n, a, inca, y, incy, mode)

call vdexp2 (n, a, y)

call vdexp2i(n, a, inca, y, incy)

call vmdexp2 (n, a, y, mode)

call vmdexp2i(n, a, inca, y, incy, mode)

Include Files
  • mkl_vml.f90
Input Parameters

Name

Type

Description

n

INTEGER

Specifies the number of elements to be calculated.

a

REAL for vsExp2

REAL for vmsExp2

DOUBLE PRECISION for vdExp2

DOUBLE PRECISION for vmdExp2

Pointer to the array containing the input vector a.

inca, incy

INTEGER, INTENT(IN)

Specifies increments for the elements of a and y.

mode

INTEGER (KIND=8)

Overrides the global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Output Parameters

Name

Type

Description

y

REAL for vsExp2

REAL for vmsExp2

DOUBLE PRECISION for vdExp2

DOUBLE PRECISION for vmdExp2

Pointer to an array containing the output vector y.

Description

The v?Exp2 function computes the base 2 exponential of vector elements.

Precision Overflow Thresholds for Real Function v?Exp2
Data Type Threshold Limitations on Input Parameters
single precision ai < log2(FLT_MAX)
double precision ai < log2(DBL_MAX)

See Special Value Notations for the conventions used in this table:

Special values for Real Function v?Exp2(x)
Argument Result VM Error Status Exception
+0 +1    
-0 +1    
x > overflow + VML_STATUS_OVERFLOW OVERFLOW
x < underflow +0 VML_STATUS_UNDERFLOW UNDERFLOW
+ +    
- +0    
QNAN QNAN    
SNAN QNAN   INVALID

See Also