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+Figure \ref{gpufloats.pdf} shows the rendering of a the edge of circle through evaluation of $x^2 + y^2 < 1$ using an x86-64 CPU and various GPU models. If we assume the x86-64 is IEEE-754 compliant performing the default rounding behaviour (to nearest) the GPUs are using different rounding behaviours which may not be IEEE-754 compliant. Whilst outside the scope of this project, consistency of floating point arithmetic on GPUs could be an interesting area for further investigation, particularly given the recent interest in use of GPUs for parallelisable numerical computing.