Developer Reference

Contents

v?Expm1

Computes an exponential of vector elements decreased by 1.

Syntax

vsExpm1
(
n
,
a
,
y
)
;
vsExpm1I(n, a, inca, y, incy);
vmsExpm1
(
n
,
a
,
y
,
mode
)
;
vmsExpm1I(n, a, inca, y, incy, mode);
vdExpm1
(
n
,
a
,
y
)
;
vdExpm1I(n, a, inca, y, incy);
vmdExpm1
(
n
,
a
,
y
,
mode
)
;
vmdExpm1I(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 float*
for
vsExpm1
,
vmsExpm1
const double*
for
vdExpm1
,
vmdExpm1
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.
Precision Overflow Thresholds for
Expm1
Function
Data Type
Threshold Limitations on Input Parameters
single precision
a
[i] < Ln( FLT_MAX )
double precision
a
[i] < Ln( DBL_MAX )
Output Parameters
Name
Type
Description
y
float*
for
vsExpm1
,
vmsExpm1
double*
for
vdExpm1
,
vmdExpm1
Pointer to an array that contains the output vector
y
.
Description
The
v?Expm1
function computes an exponential of vector elements decreased by 1.
Special Values for Real Function
v?Expm1(x)
Argument
Result
VM Error Status
Exception
+0
+0
 
 
-0
+0
 
 
X > overflow
+
VML_STATUS_OVERFLOW
OVERFLOW
+
+
 
 
-
-1
 
 
QNAN
QNAN
 
 
SNAN
QNAN
 
INVALID

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.