#include #include using namespace metal; struct Inputs { }; struct Outputs { float4 sk_FragColor [[color(0)]]; }; float frexp(float arg, thread int* exp) { return frexp(arg, *exp); } fragment Outputs fragmentMain(Inputs _in [[stage_in]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { Outputs _outputStruct; thread Outputs* _out = &_outputStruct; int exp; float foo = frexp(0.5, &exp); _out->sk_FragColor = float4(float(exp)); return *_out; }