Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 0.9
  • 09/09/2020
  • Public Content
Contents

v?Exp2

Computes the base 2 exponential of vector elements.

Syntax

vsExp2
(
n
,
a
,
y
);
vsExp2I(n, a, inca, y, incy);
vmsExp2
(
n
,
a
,
y
,
mode
);
vmsExp2I(n, a, inca, y, incy, mode);
vdExp2
(
n
,
a
,
y
);
vdExp2I(n, a, inca, y, incy);
vmdExp2
(
n
,
a
,
y
,
mode
);
vmdExp2I(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
vsExp2
const float*
 for
vmsExp2
const double*
 for
vdExp2
const double*
 for
vmdExp2
Pointer to the array containing the input vector
a
.
inca
,
incy
const MKL_INT
Specifies increments for the elements of
a
 and
y
.
mode
const MKL_INT64
Overrides the global VM
mode
 setting for this function call. See
vmlSetMode
 for possible values and their description.
Output Parameters
Name
Type
Description
y
float*
 for
vsExp2
float*
 for
vmsExp2
double*
 for
vdExp2
double*
 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
a
i
 < log
2
(FLT_MAX)
double precision
a
i
 < log
2
(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

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804