汇编 AND 运算

 AND运算
 逻辑与&&
 按位与&


一、AND运算
    1&&12=1;
    12&&0=0; 0&&1=0;
00401000  /$  55            PUSH EBP
00401001  |.  8BEC          MOV EBP,ESP
00401003  |.  83EC 10       SUB ESP,10
00401006  |.  C745 FC 93000>MOV DWORD PTR SS:[EBP-4],93              ;  i=0x93 =10010011
0040100D  |.  C745 F4 87000>MOV DWORD PTR SS:[EBP-C],87              ;  j=0x87 =10000111
00401014  |.  837D FC 00    CMP DWORD PTR SS:[EBP-4],0               ;  i and j=10000011
00401018  |.  74 0F         JE SHORT asm_AND.00401029                ;  JNE
0040101A  |.  837D F4 00    CMP DWORD PTR SS:[EBP-C],0
0040101E  |.  74 09         JE SHORT asm_AND.00401029
00401020  |.  C745 F0 01000>MOV DWORD PTR SS:[EBP-10],1              ;  t=1
00401027  |.  EB 07         JMP SHORT asm_AND.00401030
00401029  |>  C745 F0 00000>MOV DWORD PTR SS:[EBP-10],0              ;  t=0;
00401030  |>  8B45 F0       MOV EAX,DWORD PTR SS:[EBP-10]            ;  eax=t
00401033  |.  8945 F8       MOV DWORD PTR SS:[EBP-8],EAX             ;  k=eax=i&&j;
00401036  |.  8BC0          MOV EAX,EAX                              ;  __asm mov eax,eax
00401038  |.  8B4D FC       MOV ECX,DWORD PTR SS:[EBP-4]             ;  ecx=i
0040103B  |.  234D F4       AND ECX,DWORD PTR SS:[EBP-C]             ;  ecx=i&j;
0040103E  |.  894D F8       MOV DWORD PTR SS:[EBP-8],ECX             ;  k=ecx=i&j;
00401041  |.  33C0          XOR EAX,EAX
00401043  |.  8BE5          MOV ESP,EBP
00401045  |.  5D            POP EBP
00401046  \.  C3            RETN