NAME
    abs - returns absolute value of scalars and vectors.

SYNOPSIS
      float  abs( float  a );
      float1 abs( float1 a );
      float2 abs( float2 a );
      float3 abs( float3 a );
      float4 abs( float4 a );
 
      half   abs( half  a );
      half1  abs( half1 a );
      half2  abs( half2 a );
      half3  abs( half3 a );
      half4  abs( half4 a );
 
      fixed  abs( fixed  a );
      fixed1 abs( fixed1 a );
      fixed2 abs( fixed2 a );
      fixed3 abs( fixed3 a );
      fixed4 abs( fixed4 a );
 
PARAMETERS
    a       Vector or scalar of which to determine the absolute value.

DESCRIPTION
    Returns the absolute value of a scalar or vector.

    For vectors, the returned vector contains the absolute value of each
    element of the input vector.

REFERENCE IMPLEMENTATION
    abs for a float scalar could be implemented like this.

      float abs(float a)
      {
        return max(-a, a);
      }

PROFILE SUPPORT
    abs is supported in all profiles.

    Support in the fp20 is limited.

    Consider abs to be free or extremely inexpensive.

SEE ALSO
    the max manpage

