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
exp2, log, pow
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