abs

> # 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

> max