The SuperH-3, part 4: Basic arithmetic

Okay, we’re ready to do some arithmetic. Due to the limited instruction encoding space, there isn’t room for any three-operand instructions.¹ All of the arithmetic instructions are two-operand, where the second source operand also acts as the destination. ADD Rm, Rn ; The post The SuperH-3, part 4: Basic arithmetic appeared first on The Old New Thing....

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