src/sksl/sksl_interp.inc

STRINGIFY(
    float cos(float y);
    float3 cross(float3 x, float3 y);
    float dot($genType x, $genType y);
    $genType mix($genType x, $genType y, float t);
    float sin(float x);
    float sqrt(float x);
    float tan(float x);
)