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Mali Offline compiler GLSL clamp performance on Mali-Gxx

dbe_dev

Hi,

Been doing some analysis on some GLSL shader programs with the Mali Offline Compiler, great program btw.

It is however reporting that a clamp (vec3,float,float) is somehow slower for the Mali-Gxx than doing a seperate min/max according the offline compiler.

vec3 clamp_minmax (vec3 val, float minimum, float maximum){
    return clamp(val, minimum, maximum);
}

vs

vec3 clamp_minmax (vec3 val, float minimum, float maximum){
   vec3 rval = min(val, maximum);
   return max (rval, minimum);
}

Note that the minimum is a constant 0.0f.

Is this expected and correct for a Mali-Gxx ?

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