CPU: Simplify the implementation of the decode cache.
CPU: Simplify the implementation of the decode cache.

Also reorganize it to make it more amenable to being rearranged later.

rjschof/gem5,markoshorro/gem5,rjschof/gem5,Weil0ng/gem5,qizenguf/MLC-STT,gem5/gem5,sobercoder/gem5,cancro7/gem5,cancro7/gem5,joerocklin/gem5,powerjg/gem5-ci-test,markoshorro/gem5,samueldotj/TeeRISC-Simulator,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,aclifton/cpeg853-gem5,rjschof/gem5,zlfben/gem5,rjschof/gem5,gem5/gem5,samueldotj/TeeRISC-Simulator,KuroeKurose/gem5,Weil0ng/gem5,yb-kim/gemV,gedare/gem5,Weil0ng/gem5,briancoutinho0905/2dsampling,aclifton/cpeg853-gem5,sobercoder/gem5,powerjg/gem5-ci-test,aclifton/cpeg853-gem5,joerocklin/gem5,kaiyuanl/gem5,aclifton/cpeg853-gem5,KuroeKurose/gem5,markoshorro/gem5,powerjg/gem5-ci-test,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,Weil0ng/gem5,yb-kim/gemV,SanchayanMaity/gem5,SanchayanMaity/gem5,powerjg/gem5-ci-test,KuroeKurose/gem5,rjschof/gem5,rallylee/gem5,austinharris/gem5-riscv,samueldotj/TeeRISC-Simulator,kaiyuanl/gem5,rjschof/gem5,samueldotj/TeeRISC-Simulator,austinharris/gem5-riscv,KuroeKurose/gem5,qizenguf/MLC-STT,briancoutinho0905/2dsampling,markoshorro/gem5,markoshorro/gem5,sobercoder/gem5,SanchayanMaity/gem5,gedare/gem5,yb-kim/gemV,yb-kim/gemV,HwisooSo/gemV-update,rallylee/gem5,briancoutinho0905/2dsampling,austinharris/gem5-riscv,SanchayanMaity/gem5,kaiyuanl/gem5,gem5/gem5,qizenguf/MLC-STT,gem5/gem5,cancro7/gem5,KuroeKurose/gem5,SanchayanMaity/gem5,cancro7/gem5,SanchayanMaity/gem5,TUD-OS/gem5-dtu,joerocklin/gem5,joerocklin/gem5,austinharris/gem5-riscv,gem5/gem5,austinharris/gem5-riscv,sobercoder/gem5,briancoutinho0905/2dsampling,zlfben/gem5,gem5/gem5,briancoutinho0905/2dsampling,rjschof/gem5,cancro7/gem5,kaiyuanl/gem5,TUD-OS/gem5-dtu,HwisooSo/gemV-update,TUD-OS/gem5-dtu,gedare/gem5,qizenguf/MLC-STT,gedare/gem5,TUD-OS/gem5-dtu,gem5/gem5,SanchayanMaity/gem5,Weil0ng/gem5,Weil0ng/gem5,markoshorro/gem5,joerocklin/gem5,kaiyuanl/gem5,qizenguf/MLC-STT,yb-kim/gemV,gedare/gem5,TUD-OS/gem5-dtu,yb-kim/gemV,TUD-OS/gem5-dtu,zlfben/gem5,zlfben/gem5,rallylee/gem5,rallylee/gem5,sobercoder/gem5,HwisooSo/gemV-update,sobercoder/gem5,HwisooSo/gemV-update,joerocklin/gem5,joerocklin/gem5,kaiyuanl/gem5,cancro7/gem5,kaiyuanl/gem5,gedare/gem5,TUD-OS/gem5-dtu,qizenguf/MLC-STT,samueldotj/TeeRISC-Simulator,powerjg/gem5-ci-test,yb-kim/gemV,joerocklin/gem5,austinharris/gem5-riscv,cancro7/gem5,rallylee/gem5,samueldotj/TeeRISC-Simulator,yb-kim/gemV,Weil0ng/gem5,zlfben/gem5,zlfben/gem5,KuroeKurose/gem5,samueldotj/TeeRISC-Simulator,HwisooSo/gemV-update,rallylee/gem5,gedare/gem5,aclifton/cpeg853-gem5,HwisooSo/gemV-update,rallylee/gem5,austinharris/gem5-riscv,KuroeKurose/gem5,markoshorro/gem5,sobercoder/gem5,briancoutinho0905/2dsampling,HwisooSo/gemV-update,briancoutinho0905/2dsampling,zlfben/gem5,qizenguf/MLC-STT