Developer Reference

  • 2020.2
  • 07/15/2020
  • Public Content
Contents

v?MulByConj

Performs element by element multiplication of vector
a
element and conjugated vector
b
element.

Syntax

call vcmulbyconj
(
n
,
a
,
b
,
y
)
call vsmulbyconji(n, a, inca, b, incb, y, incy)
call vmcmulbyconj
(
n
,
a
,
b
,
y
,
mode
)
call vmsmulbyconji(n, a, inca, b, incb, y, incy, mode)
call vzmulbyconj
(
n
,
a
,
b
,
y
)
call vdmulbyconji(n, a, inca, b, incb, y, incy)
call vmzmulbyconj
(
n
,
a
,
b
,
y
,
mode
)
call vmdmulbyconji(n, a, inca, b, incb, y, incy, mode)
Include Files
  • mkl_vml.f90
Input Parameters
Name
Type
Description
n
INTEGER
,
INTENT(IN)
Specifies the number of elements to be calculated.
a
,
b
DOUBLE COMPLEX
for
vzmulbyconj
,
vmzmulbyconj
COMPLEX
,
INTENT(IN)
for
vcmulbyconj
,
vmcmulbyconj
DOUBLE COMPLEX
,
INTENT(IN)
for
vzmulbyconj
,
vmzmulbyconj
Arrays that specify the input vectors
a
and
b
.
inca
,
incb
,
incy
INTEGER, INTENT(IN)
Specifies increments for the elements of
a
,
b
, and
y
.
mode
INTEGER(KIND=8)
,
INTENT(IN)
Overrides global VM mode setting for this function call. See
vmlSetMode
for possible values and their description.
Output Parameters
Name
Type
Description
y
DOUBLE COMPLEX
for
vzmulbyconj
,
vmzmulbyconj
COMPLEX
,
INTENT(OUT)
for
vcmulbyconj
,
vmcmulbyconj
DOUBLE COMPLEX
,
INTENT(OUT)
for
vzmulbyconj
,
vmzmulbyconj
Array that specifies the output vector
y
.
Description
The
v?MulByConj
function performs element by element multiplication of vector
a
element and conjugated vector
b
element.
Specifications for special values of the functions are found according to the formula
MulByConj(x1+i*y1,x2+i*y2) = Mul(x1+i*y1,x2-i*y2)
.
Overflow in a complex function occurs (supported in the
HA
/
LA
accuracy modes only) when all
RE(x)
,
RE(y)
,
IM(x)
,
IM(y)
arguments are finite numbers, but the real or imaginary part of the computed result is so large that it does not fit the target precision. In this case, the function returns
in that part of the result, raises the
OVERFLOW
exception, and sets the VM Error Status to
VML_STATUS_OVERFLOW
(overriding any possible
VML_STATUS_ACCURACYWARNING
status).

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.