組み込み向けCPUの三角関数演算における精度比較

概要

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Recently, requirement to support advanced usage is increasing in the field of embedded systems. There are many different CPU architectures used in embedded systems such as Renesas H8, SH and ARM. However, few quantitative investigations have been made concerning calculations accuracy of embedded CPUs. We previously reported an accuracy of transcendental function calculation in embedded CPUs. In this paper, we focus on the accuracy of trigonometric functions calculation in embedded CPUs. Experiments are performed for 32 bit floating-point (float type) operation performance based on sin, cos and tan functions on target platforms, such as Renesas H8S, SH-2, SH-4, ARM-9 and general purpose x86 CPUs. As a result, a different value has been output for some CPU architectures. Therefore, user should note operating condition that use embedded systems.
石巻専修大学の論文