Y86 Processor State P258 Floure 41 Program registers Condition Memory 号eax号esi codes ecx edi edx es PC 各ebx号eb Program Registers e Same 8 as with lA32. Each 32 bits ■ Condition codes e Single-bit flags set by arithmetic or logical instructions >)OF: Overflow ZF: Zero SF: Negative a Program Counter Indicates address of instruction ■ Memory o Byte-addressable storage array Words stored in little-endian byte order Processor– 9 – Processor %eax %ecx %edx %ebx %esi %edi %esp %ebp Y86 Processor State ◼ Program Registers ⚫ Same 8 as with IA32. Each 32 bits ◼ Condition Codes ⚫ Single-bit flags set by arithmetic or logical instructions » OF: Overflow ZF: Zero SF:Negative ◼ Program Counter ⚫ Indicates address of instruction ◼ Memory ⚫ Byte-addressable storage array ⚫ Words stored in little-endian byte order Program registers Condition codes PC Memory OF ZF SF P258 Figure 4.1