Developer Reference

Contents

v?Fmod

The
v?Fmod
function performs element by element computation of the modulus function of vector
a
with respect to vector
b
.

Syntax

vsFmod
(
n
,
a
,
b
,
y
);
vsFmodI(n, a, inca, b, incb, y, incy);
vmsFmod
(
n
,
a
,
b
,
y
,
mode
);
vmsFmodI(n, a, inca, b, incb, y, incy, mode);
vdFmod
(
n
,
a
,
b
,
y
);
vdFmodI(n, a, inca, b, incb, y, incy);
vmdFmod
(
n
,
a
,
b
,
y
,
mode
);
vmdFmodI(n, a, inca, b, incb, 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, b
const float*
for
vsFmod
const float*
for
vmsFmod
const double*
for
vdFmod
const double*
for
vmdFmod
Pointers to arrays containing the input vectors
a
and
b
.
inca
,
incb
,
incy
const MKL_INT
Specifies increments for the elements of
a
,
b
, 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
vsFmod
float*
for
vmsFmod
double*
for
vdFmod
double*
for
vmdFmod
Pointer to an array containing the output vector
y
.
Description
The
v?Fmod
function computes the modulus function of each element of vector
a
, with respect to the corresponding elements of vector
b
:
a
i
-
b
i
*trunc(
a
i
/
b
i
)
In general, the modulus function
fmod (
a
i
,
b
i
)
returns the value
a
i
-
n
*
b
i
for some integer
n
such that if
b
i
is nonzero, the result has the same sign as
a
i
and a magnitude less than the magnitude of
b
i
.
Special values for Real Function
v?Fmod(x, y)
Argument 1
Argument 2
Result
VM Error Status
Exception
x
not NAN
±
0
NAN
VML_STATUS_SING
INVALID
±∞
y
not NAN
NAN
VML_STATUS_SING
INVALID
±
0
y
0, not NAN
±
0
 
x
finite
±∞
x
UNDERFLOW if
x
is subnormal
NAN
y
NAN
x
NAN
NAN
If element
i
in the result of
v?Fmod
is 0, its sign is that of
a
i
.

Product and Performance Information

1

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