Encoding Registers P261 Fioure 44 Each register has 4-bit ID 各eax0 号esi6 ecx 1 号edi sedx ges geba ebp Same encoding as in IA32, but IA32 using only 3-bit ID Register ID 8 indicates"no register a Will use this in our hardware design in multiple places Processor– 11 – Processor Encoding Registers Each register has 4-bit ID ◼ Same encoding as in IA32, but IA32 using only 3-bit ID Register ID 8 indicates “no register” ◼ Will use this in our hardware design in multiple places %eax %ecx %edx %ebx %esi %edi %esp %ebp 0 1 2 3 6 7 4 5 P261 Figure 4.4