Ant-32 [7], and Larc [6]. Ant-32 was designed after it was found that an earlier architecture, Ant-8, was too simply for any advanced courses. However, it is substantially more complex than its 8-bit counterpart. Larc is perhaps the most similar to Green16. It is a 16-bit RISC architecture that provides 16 machine instructions. Its combines simplicity with fair functional density, but at the cost of having five distinct instruction formats. The instruction encoding is complicated by the fact that some instructions support 8-bit immediate values, while others only support immediate values of 4 bits. The design of Green16 makes different trade-os. The introduction of the NIW register allows all instructions can be representing in a common format, while supporting full-width immediate values. The cost is slightly lower functional density when immediate values are small integers – a positive trade for a pedagogy.
Ant-32 [7], and Larc [6]. Ant-32 was designed after it was found that an earlier architecture, Ant-8, was too simply for any advanced courses. However, it is substantially more complex than its 8-bit counterpart. Larc is perhaps the most similar to Green16. It is a 16-bit RISC architecture that provides 16 machine instructions. Its combines simplicity with fair functional density, but at the cost of having five distinct instruction formats. The instruction encoding is complicated by the fact that some instructions support 8-bit immediate values, while others only support immediate values of 4 bits. The design of Green16 makes different trade-os. The introduction of the NIW register allows all instructions can be representing in a common format, while supporting full-width immediate values. The cost is slightly lower functional density when immediate values are small integers – a positive trade for a pedagogy.
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