> ## Name

> ceil - returns smallest integer not less than a scalar or each vector component.

> ## Synopsis

>     float  ceil(float a);
>     float1 ceil(float1 a);
>     float2 ceil(float2 a);
>     float3 ceil(float3 a);
>     float4 ceil(float4 a);

>     half   ceil(half a);
>     half1  ceil(half1 a);
>     half2  ceil(half2 a);
>     half3  ceil(half3 a);
>     half4  ceil(half4 a);

>     fixed  ceil(fixed a);
>     fixed1 ceil(fixed1 a);
>     fixed2 ceil(fixed2 a);
>     fixed3 ceil(fixed3 a);
>     fixed4 ceil(fixed4 a);

> ## Parameters

> a
>   Vector or scalar of which to determine the ceiling.

> ## Description

> Returns the ceiling or smallest integer not less than a scalar or each vector component.

> ## Reference Implementation

> ceil for a float scalar could be implemented like this.

>     float ceil(float v)
>     {
>       return -floor(-v);
>     }

> ## Profile Support

> ceil is supported in all profiles except fp20.

> ## See Also

> floor