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exp2.3Cg

Langue: en

Version: 345021 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

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

   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);

Returns the base-2 exponential a.

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

   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.

exp2 is fully supported in all profiles unless otherwise specified.

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