Gets the current hardware thread coordinates in the kernel's thread group space. This topic only applies to Intel® 64 and IA-32 architectures targeting Intel® Graphics Technology.
Syntax
i32 _gfx_gpgpu_group_count(i32 dim);
i32 _gfx_gpgpu_group_id(i32 dim);
i32 _gfx_gpgpu_local_size(i32 dim);
i32 _gfx_gpgpu_local_id(i32 dim);
Parameters
dim |
|
Description
These functions get information about a thread group space. A thread group space is 2-dimensional, with a 2-level hierarchy:
The top level is a 2d space of thread groups
The lower level of each thread group is a 2d space of threads.
The following table shows the information each function gets:
Function | Description |
|---|---|
_gfx_gpgpu_group_count | Gets the number of threads groups along a dimension. |
_gfx_gpgpu_local_size | Gets the number of threads along a dimension within a thread group. |
_gfx_gpgpu_group_id _gfx_gpgpu_local_id | Gets the coordinates for the current hardware thread in the thread space or thread group space created for the calling kernel. |
Return Values
Function: _gfx_gpgpu_group_count | Returns the number of thread groups along the given dimension of a 2-dimensional target thread group space. |
Function:_gfx_gpgpu_group_id | Returns the current thread group's coordinate along the given dimension of a 2-dimensional target thread group space. |
Function:_gfx_gpgpu_local_size | Returns the number of threads along the given dimension of a 2-dimensional target thread group. |
Function:_gfx_gpgpu_local_id | Returns the current thread's coordinates along the given dimension of a 2-dimensional target thread group. |