Visible to Intel only — GUID: GUID-E68A3799-1D72-4181-AA71-4338EBB25369
Visible to Intel only — GUID: GUID-E68A3799-1D72-4181-AA71-4338EBB25369
v?LGamma
Computes the natural logarithm of the absolute value of gamma function for vector elements.
Syntax
call vslgamma( n, a, y )
call vslgammai(n, a, inca, y, incy)
call vmslgamma( n, a, y, mode )
call vmslgammai(n, a, inca, y, incy, mode)
call vdlgamma( n, a, y )
call vdlgammai(n, a, inca, y, incy)
call vmdlgamma( n, a, y, mode )
call vmdlgammai(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 vdlgamma, vmdlgamma REAL, INTENT(IN) for vslgamma, vmslgamma DOUBLE PRECISION, INTENT(IN) for vdlgamma, vmdlgamma |
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 vdlgamma, vmdlgamma REAL, INTENT(OUT) for vslgamma, vmslgamma DOUBLE PRECISION, INTENT(OUT) for vdlgamma, vmdlgamma |
Array that specifies the output vector y. |
Description
The v?LGamma function computes the natural logarithm of the absolute value of gamma function for elements of the input vector a and writes them to the output vector y. Precision overflow thresholds for the v?LGamma function are beyond the scope of this document. If the result does not meet the target precision, the function raises the OVERFLOW exception and sets the VM Error Status to VML_STATUS_OVERFLOW.
Argument | Result | VM Error Status | Exception |
---|---|---|---|
+1 | +0 | ||
+2 | +0 | ||
+0 | +∞ | VML_STATUS_SING | ZERODIVIDE |
-0 | +∞ | VML_STATUS_SING | ZERODIVIDE |
negative integer | +∞ | VML_STATUS_SING | ZERODIVIDE |
-∞ | +∞ | ||
+∞ | +∞ | ||
X > overflow | +∞ | VML_STATUS_OVERFLOW | OVERFLOW |
QNAN | QNAN | ||
SNAN | QNAN | INVALID |