Looking at the 386 die, I think the decoded instruction queue consists of three parts widely separated on the die: the 32-bit immediate value stored in the data

Looking at the 386 die, I think the decoded instruction queue consists of three parts widely separated on the die: the 32-bit immediate value stored in the datapath, the instruction fields in the middle of the chip, and the microcode start address stored above the microcode ROM. I find it interesting that the queue sounds like one physical thing, but it is distributed.