在iOS中内联asm错误(Inline asm in iOS error)

在iOS中内联asm错误(Inline asm in iOS error)

int x; __asm __volatile（“movl％0，%% sp”：“= r”（x）::“％sp”）; 我想将sp存储到x。 错误：

error: unexpected token in operand __asm __volatile("movl %0, %%sp":"=r"(x)::"%sp"); ^ :1:13: note: instantiated into assembly here movl r0, %sp ^ 1 warning and 1 error generated.

int x; __asm __volatile("movl %0, %%sp":"=r"(x)::"%sp"); I want to store sp to x. The error:

error: unexpected token in operand __asm __volatile("movl %0, %%sp":"=r"(x)::"%sp"); ^ :1:13: note: instantiated into assembly here movl r0, %sp ^ 1 warning and 1 error generated.

最满意答案

我找到了我的解决方案：

asm volatile("mov %0, sp \n\t":"=r"(x));

I have found my solution:

asm volatile("mov %0, sp \n\t":"=r"(x));