NAME

exp2 - returns the base-2 exponential of scalars and vectors

SYNOPSIS

  float  exp2(float a);
  float1 exp2(float1 a);
  float2 exp2(float2 a);
  float3 exp2(float3 a);
  float4 exp2(float4 a);
 
  half   exp2(half a);
  half1  exp2(half1 a);
  half2  exp2(half2 a);
  half3  exp2(half3 a);
  half4  exp2(half4 a);
 
  fixed  exp2(fixed a);
  fixed1 exp2(fixed1 a);
  fixed2 exp2(fixed2 a);
  fixed3 exp2(fixed3 a);
  fixed4 exp2(fixed4 a);

PARAMETERS

a

Vector or scalar of which to determine the base-2 exponential.

DESCRIPTION

Returns the base-2 exponential a.

For vectors, the returned vector contains the base-2 exponential of each element of the input vector.

REFERENCE IMPLEMENTATION

  float3 exp2(float3 a)
  {
    float3 rv;
    int i;

    for (i=0; i<3; i++) {
      rv[i] = exp2(a[i]);  // this is the ANSI C standard library exp2()
    }
    return rv;
  }

exp2 is typically implemented with a native base-2 exponentional instruction.

PROFILE SUPPORT

exp2 is fully supported in all profiles unless otherwise specified.

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

SEE ALSO

exp, log, pow