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
  mov    %edx,%ecx
  push   %r14
  btr    %eax,%ecx
  lea    (%rdi,%rax,8),%rax
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xb8,%rsp
  mov    %ecx,0x80(%rsp)
  mov    %rax,0x90(%rsp)
  test   %ecx,%ecx
  je     L571
  mov    D8(%rip),%rax
  mov    %rdi,%r15
  movq   $0x0,0x20(%rsp)
  mov    (%rax),%eax
  mov    %eax,0x8(%rsp)
  mov    %eax,0x68(%rsp)
  jmp    L169
L325:
  addq   $0x1,0x20(%rsp)
  mov    0x20(%rsp),%rax
  cmp    $0x10,%rax
  je     L406
L169:
  mov    0x80(%rsp),%eax
  mov    0x20(%rsp),%edx
  bt     %edx,%eax
  jae    L325
  mov    0x90(%rsp),%rax
  mov    0x20(%rsp),%rcx
  movq   $0x0,0x28(%rsp)
  mov    0x8(%rsp),%esi
  mov    (%rax),%rax
  mov    %esi,0x5c(%rsp)
  mov    (%rax,%rcx,4),%eax
  mov    %eax,0x98(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x80(%rsp),%eax
  mov    %eax,0x84(%rsp)
  jne    L693
  jmp    L149
L738:
  addq   $0x1,0x28(%rsp)
  mov    0x28(%rsp),%rax
  cmp    $0x10,%rax
  je     L734
L693:
  mov    0x84(%rsp),%eax
  mov    0x28(%rsp),%edi
  bt     %edi,%eax
  jae    L738
  mov    0x20(%rsp),%rax
  mov    0x28(%rsp),%rsi
  movq   $0x0,0x30(%rsp)
  mov    0x8(%rsp),%edx
  mov    (%r15,%rax,8),%rax
  mov    %esi,%ecx
  mov    %edx,0x60(%rsp)
  mov    (%rax,%rsi,4),%eax
  mov    %eax,0x9c(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x84(%rsp),%eax
  mov    %eax,0x88(%rsp)
  jne    L615
  jmp    L740
L13:
  addq   $0x1,0x30(%rsp)
  mov    0x30(%rsp),%rax
  cmp    $0x10,%rax
  je     L162
L615:
  mov    0x88(%rsp),%eax
  mov    0x30(%rsp),%esi
  bt     %esi,%eax
  jae    L13
  mov    0x28(%rsp),%rax
  mov    0x8(%rsp),%ebx
  mov    %r15,%r13
  movq   $0x0,0x18(%rsp)
  mov    0x30(%rsp),%rdi
  mov    (%r15,%rax,8),%rax
  mov    %ebx,0x64(%rsp)
  mov    %edi,%ecx
  mov    (%rax,%rdi,4),%eax
  mov    %eax,0xa0(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x88(%rsp),%eax
  mov    %eax,0x8c(%rsp)
  jne    L558
  jmp    L112
L135:
  addq   $0x1,0x18(%rsp)
  mov    0x18(%rsp),%rax
  cmp    $0x10,%rax
  je     L273
L558:
  mov    0x8c(%rsp),%eax
  mov    0x18(%rsp),%edi
  bt     %edi,%eax
  jae    L135
  mov    0x30(%rsp),%rax
  mov    0x18(%rsp),%rcx
  mov    0x0(%r13,%rax,8),%rax
  mov    (%rax,%rcx,4),%eax
  mov    %eax,0xa4(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x8c(%rsp),%eax
  mov    %eax,0x6c(%rsp)
  je     L633
  mov    0x8(%rsp),%eax
  movl   $0x0,0x3c(%rsp)
  movq   $0x0,0x50(%rsp)
  mov    %eax,0x40(%rsp)
L599:
  mov    0x6c(%rsp),%eax
  mov    0x3c(%rsp),%edx
  bt     %edx,%eax
  jb     L682
L9:
  addl   $0x1,0x3c(%rsp)
  mov    0x3c(%rsp),%eax
  addq   $0x4,0x50(%rsp)
  cmp    $0x10,%eax
  jne    L599
L513:
  mov    0x64(%rsp),%ecx
  mov    0xa4(%rsp),%eax
  add    0x40(%rsp),%eax
  cmp    %eax,%ecx
  cmovle %ecx,%eax
  mov    %eax,0x64(%rsp)
  jmp    L135
L571:
  mov    (%rax),%rax
  mov    (%rax),%eax
  mov    %eax,0x68(%rsp)
L406:
  mov    0x68(%rsp),%eax
  add    $0xb8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L149:
  mov    (%r15,%rcx,8),%rax
  mov    (%rax),%eax
  mov    %eax,0x5c(%rsp)
L734:
  mov    0x68(%rsp),%ecx
  mov    0x98(%rsp),%eax
  add    0x5c(%rsp),%eax
  cmp    %eax,%ecx
  cmovle %ecx,%eax
  mov    %eax,0x68(%rsp)
  jmp    L325
L682:
  mov    0x18(%rsp),%rax
  mov    0x50(%rsp),%rcx
  xor    %r12d,%r12d
  mov    0x8(%rsp),%esi
  mov    0x0(%r13,%rax,8),%rax
  mov    %esi,0x58(%rsp)
  mov    (%rax,%rcx,1),%eax
  movzbl 0x3c(%rsp),%ecx
  mov    %eax,0x70(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x6c(%rsp),%eax
  mov    %eax,0x44(%rsp)
  je     L457
  mov    %r13,%r15
  mov    %r12,%r13
L368:
  mov    0x44(%rsp),%eax
  bt     %r13d,%eax
  jb     L156
L531:
  add    $0x1,%r13
  cmp    $0x10,%r13
  jne    L368
  mov    %r15,%r13
L456:
  mov    0x40(%rsp),%edi
  mov    0x70(%rsp),%eax
  add    0x58(%rsp),%eax
  cmp    %eax,%edi
  cmovle %edi,%eax
  mov    %eax,0x40(%rsp)
  jmp    L9
L156:
  mov    0x50(%rsp),%rax
  mov    %r13d,%ecx
  mov    0x8(%rsp),%esi
  mov    %r15,%r14
  movq   $0x0,0x10(%rsp)
  mov    (%r15,%rax,2),%rax
  mov    %esi,0x38(%rsp)
  mov    (%rax,%r13,4),%eax
  mov    %eax,0xa8(%rsp)
  mov    $0x1,%eax
  shl    %cl,%eax
  not    %eax
  and    0x44(%rsp),%eax
  mov    %eax,0x74(%rsp)
  je     L38
L349:
  mov    0x74(%rsp),%eax
  mov    0x10(%rsp),%ebx
  bt     %ebx,%eax
  jb     L258
L134:
  addq   $0x1,0x10(%rsp)
  mov    0x10(%rsp),%rax
  cmp    $0x10,%rax
  jne    L349
  mov    %r14,%r15
L649:
  mov    0x58(%rsp),%edi
  mov    0xa8(%rsp),%eax
  add    0x38(%rsp),%eax
  cmp    %eax,%edi
  cmovle %edi,%eax
  mov    %eax,0x58(%rsp)
  jmp    L531
L38:
  mov    (%r15,%r13,8),%rax
  mov    (%rax),%eax
  mov    %eax,0x38(%rsp)
  jmp    L649
  nopl   (%rax)
L258:
  mov    0x10(%rsp),%rsi
  mov    (%r14,%r13,8),%rax
  mov    $0x1,%ebx
  mov    %esi,%ecx
  mov    (%rax,%rsi,4),%eax
  shl    %cl,%ebx
  not    %ebx
  and    0x74(%rsp),%ebx
  mov    %eax,0x78(%rsp)
  mov    %ebx,0x7c(%rsp)
  je     L607
  movq   $0x0,0x48(%rsp)
  mov    0x8(%rsp),%ebp
  mov    %r14,%rbx
  movl   $0x0,0xc(%rsp)
L8:
  mov    0x7c(%rsp),%eax
  mov    0xc(%rsp),%ecx
  bt     %ecx,%eax
  jb     L433
L590:
  addl   $0x1,0xc(%rsp)
  mov    0xc(%rsp),%eax
  add    $0x8,%rbx
  addq   $0x4,0x48(%rsp)
  cmp    $0x10,%eax
  jne    L8
L104:
  mov    0x78(%rsp),%r15d
  mov    0x38(%rsp),%eax
  add    %ebp,%r15d
  cmp    %r15d,%eax
  cmovle %eax,%r15d
  mov    %r15d,0x38(%rsp)
  jmp    L134
L607:
  mov    (%r14,%rsi,8),%rax
  mov    (%rax),%ebp
  jmp    L104
  nop
L433:
  mov    0x10(%rsp),%rax
  mov    0x48(%rsp),%rdi
  mov    $0x1,%r15d
  movzbl 0xc(%rsp),%ecx
  mov    (%r14,%rax,8),%rax
  shl    %cl,%r15d
  mov    (%rax,%rdi,1),%eax
  not    %r15d
  mov    %eax,0xac(%rsp)
  and    0x7c(%rsp),%r15d
  je     L609
  mov    0x8(%rsp),%r12d
  test   $0x1,%r15b
  jne    L15
L182:
  test   $0x2,%r15b
  jne    L656
L703:
  test   $0x4,%r15b
  jne    L311
L385:
  test   $0x8,%r15b
  jne    L462
L176:
  test   $0x10,%r15b
  jne    L467
L363:
  test   $0x20,%r15b
  jne    L480
L53:
  test   $0x40,%r15b
  jne    L405
L241:
  test   $0x80,%r15b
  jne    L547
L474:
  test   $0x100,%r15d
  jne    L440
L345:
  test   $0x200,%r15d
  jne    L73
L58:
  test   $0x400,%r15d
  jne    L256
L230:
  test   $0x800,%r15d
  jne    L418
L521:
  test   $0x1000,%r15d
  jne    L328
L357:
  test   $0x2000,%r15d
  jne    L126
L698:
  test   $0x4000,%r15d
  jne    L543
L388:
  test   $0x8000,%r15d
  jne    L367
  nopl   0x0(%rax)
L148:
  mov    0xac(%rsp),%eax
  add    %r12d,%eax
  cmp    %eax,%ebp
  cmovg  %eax,%ebp
  jmp    L590
  nopl   0x0(%rax)
L609:
  mov    (%rbx),%rax
  mov    (%rax),%r12d
  jmp    L148
L457:
  mov    0x50(%rsp),%rax
  mov    0x0(%r13,%rax,2),%rax
  mov    (%rax),%eax
  mov    %eax,0x58(%rsp)
  jmp    L456
L633:
  mov    0x0(%r13,%rcx,8),%rax
  mov    (%rax),%eax
  mov    %eax,0x40(%rsp)
  jmp    L513
L112:
  mov    (%r15,%rdi,8),%rax
  mov    (%rax),%eax
  mov    %eax,0x64(%rsp)
L130:
  mov    0x60(%rsp),%esi
  mov    0xa0(%rsp),%eax
  add    0x64(%rsp),%eax
  cmp    %eax,%esi
  cmovle %esi,%eax
  mov    %eax,0x60(%rsp)
  jmp    L13
L273:
  mov    %r13,%r15
  jmp    L130
L740:
  mov    (%r15,%rsi,8),%rax
  mov    (%rax),%eax
  mov    %eax,0x60(%rsp)
L162:
  mov    0x5c(%rsp),%edi
  mov    0x9c(%rsp),%eax
  add    0x60(%rsp),%eax
  cmp    %eax,%edi
  cmovle %edi,%eax
  mov    %eax,0x5c(%rsp)
  jmp    L738
L367:
  mov    %r15d,%edx
  mov    $0xf,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x3c(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L148
L543:
  mov    %r15d,%edx
  mov    $0xe,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x38(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L388
L126:
  mov    %r15d,%edx
  mov    $0xd,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x34(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L698
L328:
  mov    %r15d,%edx
  mov    $0xc,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x30(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L357
L418:
  mov    %r15d,%edx
  mov    $0xb,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x2c(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L521
L256:
  mov    %r15d,%edx
  mov    $0xa,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x28(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L230
L73:
  mov    %r15d,%edx
  mov    $0x9,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x24(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L58
L440:
  mov    %r15d,%edx
  mov    $0x8,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x20(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L345
L547:
  mov    %r15d,%edx
  mov    $0x7,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x1c(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L474
L405:
  mov    %r15d,%edx
  mov    $0x6,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x18(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L241
L480:
  mov    %r15d,%edx
  mov    $0x5,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x14(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L53
L467:
  mov    %r15d,%edx
  mov    $0x4,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x10(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L363
L462:
  mov    %r15d,%edx
  mov    $0x3,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0xc(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L176
L311:
  mov    %r15d,%edx
  mov    $0x2,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x8(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L385
L656:
  mov    %r15d,%edx
  mov    $0x1,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    0x4(%rdx),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L703
L15:
  mov    %r15d,%edx
  xor    %esi,%esi
  mov    %r14,%rdi
  call   <Find_Shortest_Route>
  mov    (%rbx),%rdx
  add    (%rdx),%eax
  mov    %eax,%r12d
  mov    0x8(%rsp),%eax
  cmp    %eax,%r12d
  cmovg  %eax,%r12d
  jmp    L182
```

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