错误：错误的寄存器名称`%rax’ MinGW，Windows 7，x64 CPU，C ++

Error: bad register name `%rax' MinGW, Windows 7, x64 CPU, C++

在我之前的主题：如何读取寄存器：rax、rbx、rcx、rdx、rsp。C、C++中的RBP、RSI、RDI？我问起了读那些登记簿的事。现在我写了一个代码来读取(目前为止)rax和rbx。

我使用Windows7 64位操作系统，代码块和Mingw作为编译器，我在X64 CPU上工作。当我试图编译以下代码时，我得到了这些错误：

1 2	Error: bad register name `%rax' Error: bad register name `%rbx'

代码：

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#include <iostream>
#include <cstdlib>
#include <stdint.h>

void read(void)
{
uint64_t rax = 0, rbx = 0;
__asm__ __volatile__ (
/* read value from rbx into rbx */
"movq %%rbx, %0;
"
/* read value from rax into rax*/
"movq %%rax, %1;
"
/* output args */
:"=r" (rbx),"=r" (rax)
: /* no input */
/* clear both rdx and rax */
:"%rbx","%rax"
);

/* print out registers content */
std::cout <<"RAX =" << rax <<"
";
std::cout <<"RBX =" << rbx <<"
";

}

int main(int argc, char **argv)
{
read();

return 0;
}