Study summary of the week four

Four weeks Study summary y86-64 instruction set architecture visibility Status: program register, condition code, program status, program counter, and memory

such as the condition code

zf--0 sign, sf--symbol, of--signed

Y86-64 directive

• Integer operations directives: ADDQ, SUBQ, ANDQ, Xorq

• Jump commands: jmp, Jle, JL, je, jne, Jge, JG

• Conditional delivery directives: Cmovle, CMOVL, Cmove, Cmovne, Cmovge, CMOVG

Y86-64 instruction Set

function code for Y86-64 instruction set

Logic design and hardware control language operators in the HCL expression:

and:&&

Or: | |

Non -:!

HCL integer Expression

[select1 : expr1;select2 : expr2;...selectk : exprk;]

Realization of memory and clock seq last week's summary of wrong questions

The following jump commands are related to ZF ()

A.
jmp

B.
Je

C.
Js

D.
Ja

E.
Jb

F.
Jbe

Answer: B D F

Assuming that the function of the C-expression T=a+b is completed with the add instruction, the correct statement about the condition Code Register is ()

A.
If t==0, then zf=1

B.
If t<0, then cf=1

C.
If t<0, then sf=1

D.
if (a<0==b<0) && (t<0! = a<0), the of=1

E.
if (a<0==b<0) && (t<0! = a<0), the cf=1

F.
LEAQ directive does not affect the condition code register

G.
CMP directives do not affect the condition code register

Answer: A C D F

Study summary of the week four