Visible to Intel only — GUID: GUID-672CCB8D-675E-4CE4-9E0C-FB0C225701BC
Visible to Intel only — GUID: GUID-672CCB8D-675E-4CE4-9E0C-FB0C225701BC
v?Powx
Computes vector a to the scalar power b.
Syntax
call vspowx( n, a, b, y )
call vspowxi(n, a, inca, b, y, incy)
call vmspowx( n, a, b, y, mode )
call vmspowxi(n, a, inca, b, y, incy, mode)
call vdpowx( n, a, b, y )
call vdpowxi(n, a, inca, b, y, incy)
call vmdpowx( n, a, b, y, mode )
call vmdpowxi(n, a, inca, b, y, incy, mode)
call vcpowx( n, a, b, y )
call vcpowxi(n, a, inca, b, y, incy)
call vmcpowx( n, a, b, y, mode )
call vmcpowxi(n, a, inca, b, y, incy, mode)
call vzpowx( n, a, b, y )
call vzpowxi(n, a, inca, b, y, incy)
call vmzpowx( n, a, b, y, mode )
call vmzpowxi(n, a, inca, b, y, incy, mode)
Include Files
- mkl_vml.f90
Input Parameters
Name |
Type |
Description |
---|---|---|
n |
INTEGER, INTENT(IN) |
Number of elements to be calculated. |
a |
DOUBLE PRECISION for vdpowx, vmdpowx COMPLEX for vcpowx, vmcpowx DOUBLE COMPLEX for vzpowx, vmzpowx REAL, INTENT(IN) for vspowx, vmspowx DOUBLE PRECISION, INTENT(IN) for vdpowx, vmdpowx COMPLEX, INTENT(IN) for vcpowx, vmcpowx DOUBLE COMPLEX, INTENT(IN) for vzpowx, vmzpowx |
Array a that specifies the input vector |
b | DOUBLE PRECISION for vdpowx, vmdpowx COMPLEX for vcpowx, vmcpowx DOUBLE COMPLEX for vzpowx, vmzpowx REAL, INTENT(IN) for vspowx, vmspowx DOUBLE PRECISION, INTENT(IN) for vdpowx, vmdpowx COMPLEX, INTENT(IN) for vcpowx, vmcpowx DOUBLE COMPLEX, INTENT(IN) for vzpowx, vmzpowx |
Scalar value b that is the constant power. |
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. |
Data Type | Threshold Limitations on Input Parameters |
---|---|
single precision | abs(a[i]) < ( FLT_MAX )1/b |
double precision | abs(a[i]) < ( DBL_MAX )1/b |
Precision overflow thresholds for the complex v?Powx function are beyond the scope of this document.
Output Parameters
Name |
Type |
Description |
---|---|---|
y |
DOUBLE PRECISION for vdpowx, vmdpowx COMPLEX for vcpowx, vmcpowx DOUBLE COMPLEX for vzpowx, vmzpowx REAL, INTENT(OUT) for vspowx, vmspowx DOUBLE PRECISION, INTENT(OUT) for vdpowx, vmdpowx COMPLEX, INTENT(OUT) for vcpowx, vmcpowx DOUBLE COMPLEX, INTENT(OUT) for vzpowx, vmzpowx |
Array that specifies the output vector y. |
Description
The v?Powx function computes a to the power b for a vector a and a scalar b.
The real function v(s/d)Powx has certain limitations on the input range of a and b parameters. Specifically, if a[i] is positive, then b may be arbitrary. For negative a[i], the value of b must be an integer (either positive or negative).
The complex function v(c/z)Powx has no input range limitations.
Special values and VM Error Status treatment are the same as for the v?Pow function.