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 pow.
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