Test for showing bug of Rosetta2

rosetta_bug.c

#include <stdint.h>
#include <stdio.h>

int main() {
  uint64_t dividend = 0x7c0f45f1;
  uint64_t divisor = 0x52e0a6998;
  uint32_t quotient, remainder;

  __asm__ volatile("mov %%rsp, %%r11\n\t"
                   "mov %%rbp, %%r12\n\t"
                   "mov $0x79216054, %%rbp\n\t"
                   "mov $0, %%rdx\n\t"
                   "mov %2, %%rsp\n\t"
                   "mov %3, %%rax\n\t"
                   "sub $0, %%rsp\n\t"
                   "mov $0x000000000000004C, %%rcx\n\t"
                   // section start
                   "dec %%rdx\n\t"
                   "neg %%r9d\n\t"
                   "rorq %%cl, -0x79216054(%%rsp,%%rbp,1)\n\t"
                   "bswap %%r9d\n\t"
                   "btc %%edx, %%ebp\n\t"
                   "cdq\n\t"
                   "divl 4(%%rsp,%%rdx,1)\n\t" // Execute the div instruction
                   "neg %%r9d\n\t" // no effect
                   "cwd\n\t" // <- fucks up divl
                   "dec %%r9d\n\t" // no effect
                   "cwd\n\t" // <- fucks up divl
                   // section end
                   "movl %%eax, %0\n\t"
                   "movl %%edx, %1\n\t"
                   "mov %%r12, %%rbp\n\t"
                   "mov %%r11, %%rsp"
                   : "=r"(quotient), "=r"(remainder)
                   : "r"(&divisor), "r"(dividend)
                   : "rax", "rdx", "rsp");

  printf("Quotient: 0x%x, expect 0\n", quotient);
  // if you comment out cwd, you get 0x7c0f45f1 (and cwd should gives 0x7c0f0000)
  printf("Remainder: 0x%x, expect 0x7c0f0000\n", remainder);

  return 0;
}