firstbithigh function
Gets the location of the first set bit starting from the highest order bit and working downward, per component.
Syntax
int firstbithigh(
in int value
);
Parameters
-
value [in]
-
Type: int
The input value.
Return value
Type: int
The location of the first set bit.
Remarks
For a signed integer, the first significant bit is zero for a negative number.
The following overloaded versions are also available:
int2 firstbithigh(int2 value);
int3 firstbithigh(int3 value);
int4 firstbithigh(int4 value);
uint firstbithigh(uint value);
uint2 firstbithigh(uint2 value);
uint3 firstbithigh(uint3 value);
uint4 firstbithigh(uint4 value);
Minimum Shader Model
This function is supported in the following shader models.
| Shader Model | Supported |
|---|---|
| Shader Model 5 and higher shader models | yes |
This function is supported in the following types of shaders:
| Vertex | Hull | Domain | Geometry | Pixel | Compute |
|---|---|---|---|---|---|
| x | x | x | x | x | x |
See also