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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...
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 ...
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...
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 ...
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...
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?
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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...
Tetris-ing an array
...
Well, considering that you can use XOR in this situation to find the common parts of the string. Any time you xor two bytes that are the same, you get a nullbyte as the output. So we can use that to our advantage:
$first = $array[0];
$length = strlen($first...
Split function equivalent in T-SQL?
... answered Mar 30 '09 at 14:52
XORXOR
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