trunc

Computes an integer value rounded towards zero for each vector element.

Syntax

Buffer API:

void trunc(queue &exec_queue, int64_t n, buffer<T, 1> &a, buffer<T, 1> &y, uint64_t mode = mode::not_defined)

USM API:

event trunc(queue &exec_queue, int64_t n, T *a, T *y, vector_class<event> *depends, uint64_t mode = mode::not_defined)

trunc supports the following precisions.

T
float
double

Description

The trunc(a) function computes an integer value rounded towards zero for each vector element.

Argument	Result	Error Code
+0	+0
-0	-0
+∞	+∞
-∞	-∞
QNAN	QNAN
SNAN	QNAN

The trunc function does not generate any errors.

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 size n.

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.

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 size n.

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.

Output Parameters

Buffer API:

y

The buffer y containing the output vector of size n.

USM API:

y

Pointer y to the output vector of size n.

return value (event)

Function end event.

Example

An example of how to use trunc can be found in the oneMKL installation directory, under:

examples/sycl/vml/vtrunc.cpp

Parent topic: Rounding Functions