bufinfo (sm5 - asm)
Query the element count on a buffer (but not the constant buffer).
| bufinfo dest[.mask], srcResource |
|---|
| Item | Description |
|---|---|
| dest |
[in] The address of the results. |
| srcResource |
[in] Buffer, other than a constant Buffer, in an SRV (t#) or UAV (u#). |
Remarks
All components in dest receive the integer number of elements in the buffer s shader resource view. The number of elements depends on the view parameters such as memory format.
For a typed buffer SRV or UAV, the return value is the number of elements in the view (where an element is one unit of the typed format).
For a raw buffer SRV or UAV, the return value is the number of bytes in the view.
For a structured buffer SRV or UAV, the return value is the number of structures in the view.
This instruction applies to the following shader stages:
| Vertex | Hull | Domain | Geometry | Pixel | Compute |
|---|---|---|---|---|---|
| X | X | X | X | X | X |
Minimum Shader Model
This instruction is supported in the following shader models:
| Shader Model | Supported |
|---|---|
| Shader Model 5 | yes |
| Shader Model 4.1 | no |
| Shader Model 4 | no |
| Shader Model 3 (DirectX HLSL) | no |
| Shader Model 2 (DirectX HLSL) | no |
| Shader Model 1 (DirectX HLSL) | no |