inline-assembly

Is there a way of modifying specific array elements with inline assembly ? int move[2]; I'm looking to change move[0] and move[1] in __asm . I am a novice with assembly coding, mainly stick to C++, and there is probably a very simple answer. So far I've attempted to move move[1] into registers, move the number I want to change it to into another, and then move one into the other. I have managed to get it to compile but it doesnt actually work. You can use something like MOV array[TYPE array * index], value; , for example: #include <stdio.h> int main(int argc, char **argv) { int foo[] = {1, 2,

I'm developing an online judge system for programming contests like LeetCode, Codeforces, etc. As for most programming contests, inline assembler is not allowed in C/C++, so I would like to add the same restriction to my system. I would like to let GCC and G++ produce an error when compiling a C/C++ program containing inline assembler, so that any code containing inline assembler will result in compilation error. Is there a way to achieve that? Should I pass some command line arguments to GCC/G++? Note: disabling inline assembler is just for obeying the rules, not for security concerns. Is

I would like to perform ROR and ROL operations on variables in an Objective-C program. However, I can't manage it – I am not an assembly expert. Here is what I have done so far: uint8_t v1 = ....; uint8_t v2 = ....; // v2 is either 1, 2, 3, 4 or 5 asm("ROR v1, v2"); the error I get is: Unknown use of instruction mnemonic with unknown size suffix How can I fix this? Edit: The code does not need to use inline assembly. However, I haven't found a way to do this using Objective-C / C++ / C instructions. To do this in standard C, you can do: var = (var << shift) | (var >> (sizeof(var)*CHAR_BIT

Given this code: #include <stdio.h> int main(int argc, char **argv) { int x = 1; printf("Hello x = %d\n", x); } I'd like to access and manipulate the variable x in inline assembly. Ideally, I want to change its value using inline assembly. GNU assembler, and using the AT&T syntax. Aniket Inge In GNU C inline asm, with x86 AT&T syntax: (But https://gcc.gnu.org/wiki/DontUseInlineAsm if you can avoid it). // this example doesn't really need volatile: the result is the same every time asm volatile("movl $0, %[some]" : [some] "=r" (x) ); after this, x contains 0. Note that you should generally