log10

> # NAME

> log10 - returns the base-10 logarithm of scalars and vectors

> # SYNOPSIS

>       float  log10(float a);
>       float1 log10(float1 a);
>       float2 log10(float2 a);
>       float3 log10(float3 a);
>       float4 log10(float4 a);

>       half   log10(half a);
>       half1  log10(half1 a);
>       half2  log10(half2 a);
>       half3  log10(half3 a);
>       half4  log10(half4 a);

>       fixed  log10(fixed a);
>       fixed1 log10(fixed1 a);
>       fixed2 log10(fixed2 a);
>       fixed3 log10(fixed3 a);
>       fixed4 log10(fixed4 a);

> # PARAMETERS

> a

>   Vector or scalar of which to determine the base-10 logarithm.

> # DESCRIPTION

> Returns the base-10 logarithm a.

> For vectors, the returned vector contains the base-10 logarithm of each element of the input vector.

> # REFERENCE IMPLEMENTATION

>       float3 log10(float3 a)
>       {
>         float3 rv;
>         int i;

>         for (i=0; i<3; i++) {
>           rv[i] = log10(a[i]);  // this is the ANSI C standard library log10()
>         }
>         return rv;
>       }

> log10 is typically implemented with a native base-10 logarithm instruction.

> # PROFILE SUPPORT

> log10 is fully supported in all profiles unless otherwise specified.

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

> # SEE ALSO

> exp, log, log2, pow