cosd¶
Computes the cosine of vector elements multiplied by π
/180.
Syntax
Buffer API:
-
void
cosd
(queue &exec_queue, int64_t n, buffer<T, 1> &a, buffer<T, 1> &y, uint64_t mode = mode::not_defined, error_handler<T> errhandler = {})¶
USM API:
-
event
cosd
(queue &exec_queue, int64_t n, T *a, T *y, vector_class<event> *depends, uint64_t mode = mode::not_defined, error_handler<T> errhandler = {})¶
cosd
supports the following precisions.
T |
---|
|
|
Description
The cosd(a) function is a degree argument trigonometric function. It
computes the cosine of vector elements multiplied by π
/180. For
an argument a
, the function computes cos(π
*a
/180).
Note that arguments abs(a
i) ≤ 224 for single
precision or abs(a
i ) ≤ 252 for double
precision, they belong to the fast computational path:
trigonometric function arguments for which VM provides the best
possible performance. Avoid arguments with do not belong to the fast
computational path in VM High Accuracy (HA) or Low Accuracy (LA)
functions. For arguments which do not belong to the fast
computational path you can use VM Enhanced Performance (EP)
functions, which are fast on the entire function domain. However,
these functions provide lower accuracy.
Argument |
Result |
Error Code |
---|---|---|
+0 |
+1 |
|
-0 |
+1 |
|
+∞ |
QNAN |
|
-∞ |
QNAN |
|
QNAN |
QNAN |
|
SNAN |
QNAN |
Input Parameters
Buffer API:
- exec_queue
The queue where the routine should be executed.
- n
Specifies the number of elements to be calculated.
- a
The buffer
a
containing input vector of sizen
.- mode
Overrides the global VM mode setting for this function call. See set_mode function for possible values and their description. This is an optional parameter. The default value is
mode::not_defined
.- errhandler
Sets local error handling mode for this function call. See the create_error_handler function for arguments and their descriptions. This is an optional parameter. The local error handler is disabled by default.
USM API:
- exec_queue
The queue where the routine should be executed.
- n
Specifies the number of elements to be calculated.
- a
Pointer
a
to the input vector of sizen
.- depends
Vector of dependent events (to wait for input data to be ready).
- mode
Overrides the global VM mode setting for this function call. See the set_mode function for possible values and their description. This is an optional parameter. The default value is
mode::not_defined
.- errhandler
Sets local error handling mode for this function call. See the create_error_handler function for arguments and their descriptions. This is an optional parameter. The local error handler is disabled by default.
Output Parameters
Buffer API:
- y
The buffer
y
containing the output vector of sizen
.
USM API:
- y
Pointer
y
to the output vector of sizen
.- return value (event)
Function end event.
Example
An example of how to use cosd can be found in the oneMKL installation directory, under:
examples/sycl/vml/vcosd.cpp
Parent topic: Trigonometric Functions