user: 请从给定的汇编指令推导出C源代码:

```asm
<Find_Shortest_Route>:
  endbr64
  push   %r15
  movslq %esi,%rax
  push   %r14
  btr    %eax,%edx
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xb8,%rsp
  mov    %edx,0x8c(%rsp)
  movl   $0x0,0x64(%rsp)
  test   %edx,%edx
  je     L246
  mov    D4(%rip),%rdx
  mov    %rdi,%r14
  movq   $0x0,0x30(%rsp)
  lea    (%r14,%rax,8),%rax
  mov    %r14,%r15
  mov    (%rdx),%edi
  mov    %rax,0xa8(%rsp)
  mov    %edi,0x4(%rsp)
  mov    %edi,0x64(%rsp)
  jmp    L215
L572:
  addq   $0x1,0x30(%rsp)
  mov    0x30(%rsp),%rax
  cmp    $0x10,%rax
  je     L246
L215:
  mov    0x8c(%rsp),%eax
  mov    0x30(%rsp),%ecx
  bt     %ecx,%eax
  jae    L572
  mov    0xa8(%rsp),%rax
  mov    0x30(%rsp),%rsi
  mov    (%rax),%rax
  mov    %esi,%ecx
  mov    (%rax,%rsi,4),%eax
  mov    %eax,0x88(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x8c(%rsp),%eax
  mov    %eax,0x90(%rsp)
  je     L559
  movq   $0x0,0x38(%rsp)
  mov    0x4(%rsp),%eax
  mov    %eax,0x68(%rsp)
  jmp    L526
L95:
  addq   $0x1,0x38(%rsp)
  mov    0x38(%rsp),%rax
  cmp    $0x10,%rax
  je     L542
L526:
  mov    0x90(%rsp),%eax
  mov    0x38(%rsp),%ecx
  bt     %ecx,%eax
  jae    L95
  mov    0x30(%rsp),%rax
  mov    0x38(%rsp),%rcx
  mov    (%r15,%rax,8),%rax
  mov    (%rax,%rcx,4),%eax
  mov    %eax,0x94(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x90(%rsp),%eax
  mov    %eax,0x98(%rsp)
  je     L180
  movq   $0x0,0x40(%rsp)
  mov    0x4(%rsp),%eax
  mov    %eax,0x6c(%rsp)
  jmp    L198
L316:
  addq   $0x1,0x40(%rsp)
  mov    0x40(%rsp),%rax
  cmp    $0x10,%rax
  je     L453
L198:
  mov    0x98(%rsp),%eax
  mov    0x40(%rsp),%ebx
  bt     %ebx,%eax
  jae    L316
  mov    0x38(%rsp),%rax
  mov    0x40(%rsp),%rsi
  mov    (%r15,%rax,8),%rax
  mov    %esi,%ecx
  mov    (%rax,%rsi,4),%eax
  mov    %eax,0x9c(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x98(%rsp),%eax
  mov    %eax,0xa0(%rsp)
  je     L293
  movq   $0x0,0x20(%rsp)
  mov    0x4(%rsp),%eax
  mov    %eax,0x70(%rsp)
  jmp    L513
L616:
  addq   $0x1,0x20(%rsp)
  mov    0x20(%rsp),%rax
  cmp    $0x10,%rax
  je     L65
L513:
  mov    0xa0(%rsp),%eax
  mov    0x20(%rsp),%edi
  bt     %edi,%eax
  jae    L616
  mov    0x40(%rsp),%rax
  mov    0x20(%rsp),%rdi
  mov    (%r15,%rax,8),%rax
  mov    %edi,%ecx
  mov    (%rax,%rdi,4),%eax
  mov    %eax,0xa4(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0xa0(%rsp),%eax
  mov    %eax,0x74(%rsp)
  je     L31
  mov    0x4(%rsp),%eax
  movl   $0x0,0x28(%rsp)
  movq   $0x0,0x58(%rsp)
  mov    %eax,0x50(%rsp)
L8:
  mov    0x74(%rsp),%eax
  mov    0x28(%rsp),%ecx
  bt     %ecx,%eax
  jb     L554
L258:
  addl   $0x1,0x28(%rsp)
  mov    0x28(%rsp),%eax
  addq   $0x4,0x58(%rsp)
  cmp    $0x10,%eax
  jne    L8
  mov    0x50(%rsp),%ebx
  add    %ebx,0xa4(%rsp)
L31:
  mov    0x70(%rsp),%esi
  mov    0xa4(%rsp),%eax
  cmp    %eax,%esi
  cmovle %esi,%eax
  mov    %eax,0x70(%rsp)
  jmp    L616
L246:
  mov    0x64(%rsp),%eax
  add    $0xb8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L542:
  mov    0x68(%rsp),%esi
  add    %esi,0x88(%rsp)
L559:
  mov    0x64(%rsp),%esi
  mov    0x88(%rsp),%eax
  cmp    %eax,%esi
  cmovle %esi,%eax
  mov    %eax,0x64(%rsp)
  jmp    L572
L554:
  mov    0x20(%rsp),%rax
  mov    0x58(%rsp),%rsi
  movzbl 0x28(%rsp),%ecx
  mov    (%r15,%rax,8),%rax
  mov    (%rax,%rsi,1),%eax
  mov    %eax,0x60(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x74(%rsp),%eax
  mov    %eax,0x2c(%rsp)
  je     L137
  mov    0x4(%rsp),%eax
  xor    %r14d,%r14d
  mov    %eax,0x78(%rsp)
L189:
  mov    0x2c(%rsp),%eax
  bt     %r14d,%eax
  jb     L472
L680:
  add    $0x1,%r14
  cmp    $0x10,%r14
  jne    L189
  mov    0x78(%rsp),%esi
  add    %esi,0x60(%rsp)
L137:
  mov    0x50(%rsp),%ecx
  mov    0x60(%rsp),%eax
  cmp    %eax,%ecx
  cmovle %ecx,%eax
  mov    %eax,0x50(%rsp)
  jmp    L258
L472:
  mov    0x58(%rsp),%rax
  mov    %r14d,%ecx
  mov    (%r15,%rax,2),%rax
  mov    (%rax,%r14,4),%eax
  mov    %eax,0x54(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x2c(%rsp),%eax
  mov    %eax,0x7c(%rsp)
  je     L108
  mov    0x4(%rsp),%eax
  mov    %r14,0x18(%rsp)
  mov    %r15,%r14
  movq   $0x0,0x8(%rsp)
  mov    %eax,0x10(%rsp)
L67:
  mov    0x7c(%rsp),%eax
  mov    0x8(%rsp),%ebx
  bt     %ebx,%eax
  jb     L416
L392:
  addq   $0x1,0x8(%rsp)
  mov    0x8(%rsp),%rax
  cmp    $0x10,%rax
  jne    L67
  mov    0x10(%rsp),%esi
  add    %esi,0x54(%rsp)
  mov    %r14,%r15
  mov    0x18(%rsp),%r14
L108:
  mov    0x78(%rsp),%edi
  mov    0x54(%rsp),%eax
  cmp    %eax,%edi
  cmovle %edi,%eax
  mov    %eax,0x78(%rsp)
  jmp    L680
  nopl   0x0(%rax,%rax,1)
L416:
  mov    0x18(%rsp),%rax
  mov    0x8(%rsp),%rdi
  mov    (%r14,%rax,8),%rax
  mov    %edi,%ecx
  mov    (%rax,%rdi,4),%ebx
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x7c(%rsp),%eax
  mov    %eax,0x80(%rsp)
  je     L379
  movq   $0x0,0x48(%rsp)
  mov    %r14,%r13
  mov    0x4(%rsp),%ebp
  mov    %ebx,%r14d
  movl   $0x0,0x14(%rsp)
  mov    %r13,%rbx
L381:
  mov    0x80(%rsp),%eax
  mov    0x14(%rsp),%edi
  bt     %edi,%eax
  jb     L103
L440:
  addl   $0x1,0x14(%rsp)
  mov    0x14(%rsp),%eax
  add    $0x8,%r13
  addq   $0x4,0x48(%rsp)
  cmp    $0x10,%eax
  jne    L381
  mov    %rbx,%rax
  mov    %r14d,%ebx
  add    %ebp,%ebx
  mov    %rax,%r14
L379:
  mov    0x10(%rsp),%eax
  cmp    %ebx,%eax
  cmovle %eax,%ebx
  mov    %ebx,0x10(%rsp)
  jmp    L392
  nopl   0x0(%rax)
L103:
  mov    0x8(%rsp),%rax
  mov    0x48(%rsp),%rcx
  mov    $0x1,%r15d
  mov    (%rbx,%rax,8),%rax
  mov    (%rax,%rcx,1),%eax
  movzbl 0x14(%rsp),%ecx
  shl    %cl,%r15d
  mov    %eax,0x84(%rsp)
  not    %r15d
  and    0x80(%rsp),%r15d
  je     L243
  mov    0x4(%rsp),%r12d
  test   $0x1,%r15b
  jne    L225
L486:
  test   $0x2,%r15b
  jne    L568
L120:
  test   $0x4,%r15b
  jne    L165
L228:
  test   $0x8,%r15b
  jne    L611
L286:
  test   $0x10,%r15b
  jne    L671
L688:
  test   $0x20,%r15b
  jne    L89
L677:
  test   $0x40,%r15b
  jne    L190
L339:
  test   $0x80,%r15b
  jne    L57
L422:
  test   $0x100,%r15d
  jne    L176
L185:
  test   $0x200,%r15d
  jne    L175
L306:
  test   $0x400,%r15d
  jne    L109
L0:
  test   $0x800,%r15d
  jne    L144
L217:
  test   $0x1000,%r15d
  jne    L152
L340:
  test   $0x2000,%r15d
  jne    L61
L3:
  test   $0x4000,%r15d
  jne    L345
L356:
  test   $0x8000,%r15d
  jne    L462
  add    %r12d,0x84(%rsp)
  nopl   0x0(%rax)
L243:
  mov    0x84(%rsp),%eax
  cmp    %eax,%ebp
  cmovg  %eax,%ebp
  jmp    L440
L65:
  mov    0x70(%rsp),%edi
  add    %edi,0x9c(%rsp)
L293:
  mov    0x6c(%rsp),%ecx
  mov    0x9c(%rsp),%eax
  cmp    %eax,%ecx
  cmovle %ecx,%eax
  mov    %eax,0x6c(%rsp)
  jmp    L316
L453:
  mov    0x6c(%rsp),%ecx
  add    %ecx,0x94(%rsp)
L180:
  mov    0x68(%rsp),%edi
  mov    0x94(%rsp),%eax
  cmp    %eax,%edi
  cmovle %edi,%eax
  mov    %eax,0x68(%rsp)
  jmp    L95
L225:
  mov    %r15d,%edx
  xor    %esi,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    (%rdx),%eax
  mov    %eax,%r12d
  mov    0x4(%rsp),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L486
L462:
  mov    %r15d,%edx
  mov    $0xf,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x3c(%rdx),%eax
  cmp    %r12d,%eax
  cmovg  %r12d,%eax
  add    %eax,0x84(%rsp)
  jmp    L243
L345:
  mov    %r15d,%edx
  mov    $0xe,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x38(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L356
L61:
  mov    %r15d,%edx
  mov    $0xd,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x34(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L3
L152:
  mov    %r15d,%edx
  mov    $0xc,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x30(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L340
L144:
  mov    %r15d,%edx
  mov    $0xb,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x2c(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L217
L109:
  mov    %r15d,%edx
  mov    $0xa,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x28(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L0
L175:
  mov    %r15d,%edx
  mov    $0x9,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x24(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L306
L176:
  mov    %r15d,%edx
  mov    $0x8,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x20(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L185
L57:
  mov    %r15d,%edx
  mov    $0x7,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x1c(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L422
L190:
  mov    %r15d,%edx
  mov    $0x6,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x18(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L339
L89:
  mov    %r15d,%edx
  mov    $0x5,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x14(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L677
L671:
  mov    %r15d,%edx
  mov    $0x4,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x10(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L688
L611:
  mov    %r15d,%edx
  mov    $0x3,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0xc(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L286
L165:
  mov    %r15d,%edx
  mov    $0x2,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x8(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L228
L568:
  mov    %r15d,%edx
  mov    $0x1,%esi
  mov    %rbx,%rdi
  call   <Find_Shortest_Route>
  mov    0x0(%r13),%rdx
  add    0x4(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L120
```

assistant: ```c
int Find_Shortest_Route(int **distances, int startNode, uint16_t unvisitedMask) {
  int n, minDist, nextDist;
  unvisitedMask &= ~(1 << startNode);
  if (unvisitedMask == 0x0000)
    return 0;
  minDist = INT_MAX;
  for (n = 0; n < 16; n++) {
    if (unvisitedMask & (1 << n)) {
      nextDist = distances[startNode][n] + Find_Shortest_Route(distances, n, unvisitedMask);
      if (nextDist < minDist)
        minDist = nextDist;
    }
  }
  return minDist;
}
```