Contents

v?Arg

Computes argument of vector elements.

Syntax

vcArg
(
n
,
a
,
y
)
;
vmcArg
(
n
,
a
,
y
,
mode
)
;
vzArg
(
n
,
a
,
y
)
;
vmzArg
(
n
,
a
,
y
,
mode
)
;
Include Files
  • mkl.h
Input Parameters
Name
Type
Description
n
const MKL_INT
Specifies the number of elements to be calculated.
a
const MKL_Complex8*
for
vcArg
,
vmcArg
const MKL_Complex16*
for
vzArg
,
vmcArg
Pointer to an array that contains the input vector
a
.
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
vcArg
,
vmcArg
double*
for
vzArg
,
vmcArg
Pointer to an array that contains the output vector
y
.
Description
The
v?Arg
function computes argument of vector elements.
See Special Value Notations for the conventions used in the table below.
Special Values for Complex Function
v?Arg(z)
RE(z)
i
·
IM(z)
-
 
-X
 
-0
 
+0
 
+X
 
+
 
NAN
 
+i
·
+3
·
π
/4
+
π
/2
+
π
/2
+
π
/2
+
π
/2
+
π
/4
NAN
+i
·
Y
+
π
+
π
/2
+
π
/2
+0
NAN
+i
·
0
+
π
+
π
+
π
+0
+0
+0
NAN
-i
·
0
-
π
-
π
-
π
-0
-0
-0
NAN
-i
·
Y
-
π
-
π
/2
-
π
/2
-0
NAN
-i
·
-3
·
π
/4
-
π
/2
-
π
/2
-
π
/2
-
π
/2
-
π
/4
NAN
+i
·
NAN
NAN
NAN
NAN
NAN
NAN
NAN
NAN
Notes:
  • raises
    INVALID
    exception when real or imaginary part of the argument is
    SNAN
  • Arg(z)=Atan2(IM(z),RE(z))
    .
1

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 reservered 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