Visible to Intel only — GUID: GUID-07DACC98-83C5-491C-A13D-1DF59E0A4673
Visible to Intel only — GUID: GUID-07DACC98-83C5-491C-A13D-1DF59E0A4673
v?Ln
Computes natural logarithm of vector elements.
Syntax
vhLn( n, a, y );
vhLnI(n, a, inca, y, incy);
vmhLn( n, a, y, mode );
vmhLnI(n, a, inca, y, incy, mode);
vsLn( n, a, y );
vsLnI(n, a, inca, y, incy);
vmsLn( n, a, y, mode );
vmsLnI(n, a, inca, y, incy, mode);
vdLn( n, a, y );
vdLnI(n, a, inca, y, incy);
vmdLn( n, a, y, mode );
vmdLnI(n, a, inca, y, incy, mode);
vcLn( n, a, y );
vcLnI(n, a, inca, y, incy);
vmcLn( n, a, y, mode );
vmcLnI(n, a, inca, y, incy, mode);
vzLn( n, a, y );
vzLnI(n, a, inca, y, incy);
vmzLn( n, a, y, mode );
vmzLnI(n, a, inca, y, incy, mode);
Include Files
- mkl.h
Input Parameters
Name |
Type |
Description |
---|---|---|
n |
const MKL_INT |
Specifies the number of elements to be calculated. |
a |
const _Float16* for vhLn, vmhLn const float* for vsLn, vmsLn const double* for vdLn, vmdLn const MKL_Complex8* for vcLn, vmcLn const MKL_Complex16* for vzLn, vmzLn |
Pointer to an array that contains the input vector a. |
inca, incy |
const MKL_INT |
Specifies increments for the elements of a and y. |
mode |
const MKL_INT64 |
Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description. |
Output Parameters
Name |
Type |
Description |
---|---|---|
y |
_Float16* for vhLn, vmhLn float* for vsLn, vmsLn double* for vdLn, vmdLn MKL_Complex8* for vcLn, vmcLn MKL_Complex16* for vzLn, vmzLn |
Pointer to an array that contains the output vector y. |
Description
The v?Ln function computes natural logarithm of vector elements.
Argument | Result | VM Error Status | Exception |
---|---|---|---|
+1 | +0 | ||
X < +0 | QNAN | VML_STATUS_ERRDOM | INVALID |
+0 | -∞ | VML_STATUS_SING | ZERODIVIDE |
-0 | -∞ | VML_STATUS_SING | ZERODIVIDE |
-∞ | QNAN | VML_STATUS_ERRDOM | INVALID |
+∞ | +∞ | ||
QNAN | QNAN | ||
SNAN | QNAN | INVALID |
See Special Value Notations for the conventions used in the table below.
RE(z) i·IM(z) |
-∞
|
-X
|
-0
|
+0
|
+X
|
+∞
|
NAN
|
---|---|---|---|---|---|---|---|
+i·∞ | +∞+i·π/2 | +∞+i·π/2 | +∞+i·π/2 | +∞+i·π/2 | +∞+i·π/4 | +∞+i·QNAN |
|
+i·Y | +∞+i·π | +∞+i·0 | QNAN+i·QNAN INVALID |
||||
+i·0 | +∞+i·π | -∞+i·π ZERODIVIDE | -∞+i·0 ZERODIVIDE | +∞+i·0 | QNAN+i·QNAN INVALID |
||
-i·0 | +∞-i·π | -∞-i·π ZERODIVIDE | -∞-i·0 ZERODIVIDE | +∞-i·0 | QNAN+i·QNAN INVALID |
||
-i·Y | +∞-i·π | +∞-i·0 | QNAN+i·QNAN INVALID |
||||
-i·∞ | +∞-i·π/2 | +∞-i·π/2 | +∞-i·π/2 | +∞-i·π/2 | +∞-i·π/4 | +∞+i·QNAN | |
+i·NAN | +∞+i·QNAN |
QNAN+i·QNAN INVALID |
QNAN+i·QNAN INVALID |
QNAN+i·QNAN INVALID |
QNAN+i·QNAN INVALID |
+∞+i·QNAN |
QNAN+i·QNAN INVALID |
Notes:
raises INVALID exception when real or imaginary part of the argument is SNAN