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