Developer Reference

Contents

v?Abs

Computes absolute value of vector elements.

Syntax

vsAbs
(
n
,
a
,
y
)
;
vsAbsI(n, a, inca, y, incy);
vmsAbs
(
n
,
a
,
y
,
mode
)
;
vmsAbsI(n, a, inca, y, incy, mode);
vdAbs
(
n
,
a
,
y
)
;
vdAbsI(n, a, inca, y, incy);
vmdAbs
(
n
,
a
,
y
,
mode
)
;
vmdAbsI(n, a, inca, y, incy, mode);
vcAbs
(
n
,
a
,
y
)
;
vcAbsI(n, a, inca, y, incy);
vmcAbs
(
n
,
a
,
y
,
mode
)
;
vmcAbsI(n, a, inca, y, incy, mode);
vzAbs
(
n
,
a
,
y
)
;
vzAbsI(n, a, inca, y, incy);
vmzAbs
(
n
,
a
,
y
,
mode
)
;
vmzAbsI(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
vsAbs
,
vmsAbs
const double*
for
vdAbs
,
vmdAbs
const MKL_Complex8*
for
vcAbs
,
vmcAbs
const MKL_Complex16*
for
vzAbs
,
vmzAbs
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
float*
for
vsAbs
,
vmsAbs
,
vcAbs
,
vmcAbs
double*
for
vdAbs
,
vmdAbs
,
vzAbs
,
vmzAbs
Pointer to an array that contains the output vector
y
.
Description
The
v?Abs
function computes an absolute value of vector elements.
Special Values for Real Function
v?Abs(x)
Argument
Result
Exception
+0
+0
 
-0
+0
 
+
+
 
-
+
 
QNAN
QNAN
 
SNAN
QNAN
INVALID
Specifications for special values of the complex functions are defined according to the following formula
Abs(z) = Hypot(RE(z),IM(z))
.

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