前面在講 pipeline 的時候
大家應該有發現 single issue 的設計有讓整個 pipeline 更好擴充

這次擴展 In Order CPU 把它變成 dual issue
rtl 的部分只是多了 rtl/tops/tiny5_dual_inorder.sv
順帶擴充了 systemC 的部分，讓他也支援 dual issue in order CPU

只加上 dual issue CPU 實作，會發現 cycle count 對不起來：

4: [PASS] random arithmetic seed 1 [normal] rtl_cycles=2984 systemc_cycles=3011 retired=256
4: [PASS] random arithmetic seed 1 [stalled] rtl_cycles=3133 systemc_cycles=3158 retired=256
4: [PASS] random arithmetic seed 2 [normal] rtl_cycles=2923 systemc_cycles=2949 retired=256
4: [PASS] random arithmetic seed 2 [stalled] rtl_cycles=3059 systemc_cycles=3082 retired=256

這次加上 systemC 的 dual issue C-model，就對得上了：

5: [PASS] random arithmetic seed 1 [normal] rtl_cycles=2984 systemc_cycles=2984 retired=256
5: [PASS] random arithmetic seed 1 [stalled] rtl_cycles=3133 systemc_cycles=3133 retired=256
5: [PASS] random arithmetic seed 2 [normal] rtl_cycles=2923 systemc_cycles=2923 retired=256
5: [PASS] random arithmetic seed 2 [stalled] rtl_cycles=3059 systemc_cycles=3059 retired=256

git link with tag: https://github.com/hsufit/TINY5_OOO/tree/ithome2026_D13