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CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...c_76A0B8C7
769AEF72 push edi
769AEF73 xor edi, edi
769AEF75 cmp [ebp+8], edi ; 判断第一个参数是否为NULL
769AEF78 jnz loc_76A0B8D1
769AEF7E
769AEF7Eloc_769AEF7E:
769AEF7E call ?IsRu...
Code Golf - π day
...: 490 chars
mov si,80h
mov cl,[si]
jcxz ret
mov bx,10
xor ax,ax
xor bp,bp
dec cx
a:mul bx
mov dl,[si+2]
sub dl,48
cmp dl,bl
jae ret
add ax,dx
inc si
loop a
mov dl,al
inc dl
mov dh,al
add dh,dh
mov ch,dh
mul al
mov...
How did I get a value larger than 8 bits in size from an 8-bit integer?
...
The assembler code reveals the problem:
:loop
mov esi, ebx
xor eax, eax
mov edi, OFFSET FLAT:.LC2 ;"c: %i\n"
sub ebx, 1
call printf
cmp ebx, -301
jne loop
mov esi, -45
mov edi, OFFSET FLAT:.LC2 ;"c: %i\n"
xor eax, eax
call printf
EBX should be anded with FF post decremen...
Cleanest way to toggle a boolean variable in Java?
... search terms. The code above doesn't. For those who need it, it's bitwise XOR as described here.
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Avoiding if statement inside a for loop?
...rite_vector(int*, int*, bool)+0x40>
4005d3: 31 ed xor %ebp,%ebp
4005d5: 0f 1f 00 nopl (%rax)
4005d8: 8b 13 mov (%rbx),%edx
4005da: 89 ee mov %ebp,%esi
4005dc: 31 c0 xor %eax,%e...
Windows x64编程中寄存器的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...TING, FILE_ATTRIBUTE_NORMAL, NULL);
000000013F79157D 45 33 ED xor r13d,r13d
000000013F791580 4C 8B E1 mov r12,rcx
000000013F791583 4C 89 6C 24 30 mov qword ptr [rsp+30h],r13 // 第 7 个参数
000000013F791588 45 8D 45 01 ...
When should the volatile keyword be used in C#?
... (IA32):
void main()
{
00401000 push ecx
int j = 0;
00401001 xor ecx,ecx
for (int i = 0 ; i < 100 ; ++i)
00401003 xor eax,eax
00401005 mov edx,1
0040100A lea ebx,[ebx]
{
j += i;
00401010 add ecx,eax
00401012 add eax,e...
Wolfram's Rule 34 in XKCD [closed]
...gt; 1
You can do all of this with a single "color" of comparing (like an XOR circuit for example) and even merge this operation with the write operation. Then by keeping 2 control bits somewhere (o and 1 at the beginning of your memory) you can accomplish writing a plain 0 or 1 by comparing those ...
Zero-based month numbering [closed]
...m Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 and would always be up to the length of elements, excluding the last one.
Also, the use of zero is also po...
Can I catch multiple Java exceptions in the same catch clause?
...
XOR sign ( I ) is not the same as OR ( || ), A | B means either A or B but not both A || B means either A or B or both so as for exceptions it is either exceptionA or exceptionB but not both at the same time. this is why the...