NAME
    exp - returns the base-e exponential of scalars and vectors

SYNOPSIS
      float  exp(float a);
      float1 exp(float1 a);
      float2 exp(float2 a);
      float3 exp(float3 a);
      float4 exp(float4 a);
 
      half   exp(half a);
      half1  exp(half1 a);
      half2  exp(half2 a);
      half3  exp(half3 a);
      half4  exp(half4 a);
 
      fixed  exp(fixed a);
      fixed1 exp(fixed1 a);
      fixed2 exp(fixed2 a);
      fixed3 exp(fixed3 a);
      fixed4 exp(fixed4 a);

PARAMETERS
    a       Vector or scalar of which to determine the base-e exponential.
            The value e is approximately 2.71828182845904523536.

DESCRIPTION
    Returns the base-e exponential *a*.

    For vectors, the returned vector contains the base-e exponential of each
    element of the input vector.

REFERENCE IMPLEMENTATION
      float3 exp(float3 a)
      {
        float3 rv;
        int i;

        for (i=0; i<3; i++) {
          rv[i] = exp(a[i]);  // this is the ANSI C standard library exp()
        }
        return rv;
      }

    exp is typically implemented with either a native base-2 exponentional
    instruction or the pow manpage.

PROFILE SUPPORT
    exp is fully supported in all profiles unless otherwise specified.

    Support in the fp20 is limited to constant compile-time evaluation.

SEE ALSO
    the exp2 manpage, the log manpage, the pow manpage

