# test_likely.cpp:7: if (unlikely(argc > 0)) { .loc 1 7 0 cmpl $0, -4(%rbp) #, argc setg %al #, _1 movzbl %al, %eax # _1, _2 testq %rax, %rax # _3 je .L2 #, # test_likely.cpp:8: printf("Positive\n"); .loc 1 8 0 leaq .LC0(%rip), %rdi #, call puts@PLT # jmp .L3 # .L2: # test_likely.cpp:10: printf("Zero or Negative\n"); .loc 1 10 0 leaq .LC1(%rip), %rdi #, call puts@PLT # .L3: # test_likely.cpp:12: return 0; .loc 1 12 0 movl $0, %eax #, _9 解释一下这段汇编代码
时间: 2024-03-07 16:51:52 浏览: 16
这段汇编代码是从一段 C++ 代码编译而来。它首先检查 argc 变量是否大于 0,如果是,则跳转到标签 .L2,否则继续执行下一条指令。在标签 .L2 中,它会打印出 "Zero or Negative",然后跳转到标签 .L3 继续执行。在标签 .L3 中,它会返回 0。这段代码的作用是根据命令行参数 argc 的值打印出 "Positive" 或 "Zero or Negative"。在这段代码中使用了 unlikely 宏来提示编译器,条件语句中的条件很可能是不成立的,以便编译器做出更好的优化。
相关问题
Unstable_TrapFocus.js:84 Uncaught RangeError: Maximum call stack size exceeded.
This error occurs when a function calls itself repeatedly until the call stack reaches its maximum limit. The most common cause of this error is a recursive function that doesn't have a proper exit condition, causing it to call itself indefinitely.
In the case of the Unstable_TrapFocus.js script, the error is likely caused by a recursive function that's being called repeatedly, causing the call stack to overflow. To fix the issue, you'll need to identify the recursive function and add an exit condition that prevents it from calling itself indefinitely.
One way to do this is to use a debugger to step through the code and identify the function that's causing the error. Once you've identified the function, you can add a conditional statement that checks if the exit condition has been met before calling the function again.
For example, if the function is supposed to iterate over an array and perform some action on each item, you can add a check that stops the iteration once the end of the array is reached:
```
function myRecursiveFunction(array, index) {
if (index >= array.length) {
return; // exit condition
}
// perform action on array[index]
myRecursiveFunction(array, index + 1); // call function again with incremented index
}
```
By adding an exit condition to your recursive function, you can prevent it from calling itself indefinitely and avoid the "Maximum call stack size exceeded" error.
Main.java:27: error: -> expected List<Double>Result = newArrayList<Double>(); ^
This error message indicates that there is a syntax error in the code on line 27. The arrow symbol "->" is not expected in this context.
Based on the code snippet provided, it is likely that there is a missing space between "List<Double>" and "Result" in the code. The correct syntax should be:
List<Double> result = new ArrayList<Double>();
Note the space between "List<Double>" and "result". Additionally, the method should be capitalized as "new ArrayList<>()" instead of "newArrayList<>()".