user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<relax>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %rdi,0x30(%rsp)
  mov    %rsi,0x58(%rsp)
  mov    %rdx,0x38(%rsp)
  mov    %rcx,0x40(%rsp)
  mov    %r9,0x48(%rsp)
  movl   $0x0,0x54(%rsp)
  mov    %r8,%rbp
  cmpl   $0x0,0xb0(%rsp)
  jg     L6
L26:
  add    $0x68,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L80:
  call   <sqrt@plt>
  jmp    L73
L27:
  mov    0xa0(%rsp),%rax
  cmpb   $0x0,(%rax,%rbx,1)
  jne    L54
  movsd  0x0(%rbp,%rbx,8),%xmm1
  minsd  %xmm0,%xmm1
  movapd %xmm1,%xmm0
L54:
  movsd  0x0(%rbp,%rbx,8),%xmm2
  subsd  %xmm0,%xmm2
  divsd  %xmm0,%xmm2
  movsd  0x18(%rsp),%xmm1
  mulsd  %xmm2,%xmm1
  movsd  0x20(%rsp),%xmm0
  mulsd  %xmm2,%xmm0
  mov    0x40(%rsp),%rax
  movapd %xmm1,%xmm3
  mulsd  (%rax,%rbx,8),%xmm3
  movsd  0x10(%rsp),%xmm2
  subsd  %xmm3,%xmm2
  mov    0x8(%rsp),%rsi
  movsd  %xmm2,(%rsi)
  movapd %xmm0,%xmm3
  mulsd  (%rax,%rbx,8),%xmm3
  movsd  (%r14),%xmm2
  subsd  %xmm3,%xmm2
  movsd  %xmm2,(%r14)
  mov    0x38(%rsp),%rax
  mulsd  (%rax,%rbx,8),%xmm1
  addsd  0x0(%r13),%xmm1
  movsd  %xmm1,0x0(%r13)
  mulsd  (%rax,%rbx,8),%xmm0
  addsd  (%r12),%xmm0
  movsd  %xmm0,(%r12)
  add    $0x1,%rbx
  add    $0x10,%r15
  cmp    0x28(%rsp),%rbx
  je     L100
L82:
  mov    (%r15),%eax
  add    %eax,%eax
  cltq
  shl    $0x3,%rax
  mov    0x30(%rsp),%rdx
  lea    (%rdx,%rax,1),%rcx
  mov    %rcx,0x8(%rsp)
  movsd  (%rcx),%xmm6
  movsd  %xmm6,0x10(%rsp)
  lea    0x8(%rdx,%rax,1),%r14
  mov    0x8(%r15),%eax
  add    %eax,%eax
  cltq
  shl    $0x3,%rax
  lea    (%rdx,%rax,1),%r13
  lea    0x8(%rdx,%rax,1),%r12
  movsd  0x0(%r13),%xmm0
  movapd %xmm0,%xmm4
  subsd  %xmm6,%xmm4
  movsd  %xmm4,0x18(%rsp)
  movsd  (%r12),%xmm0
  movapd %xmm0,%xmm5
  subsd  (%r14),%xmm5
  movsd  %xmm5,0x20(%rsp)
  movapd %xmm4,%xmm0
  mulsd  %xmm4,%xmm0
  movapd %xmm5,%xmm1
  mulsd  %xmm5,%xmm1
  addsd  %xmm1,%xmm0
  pxor   %xmm7,%xmm7
  ucomisd %xmm0,%xmm7
  ja     L80
  sqrtsd %xmm0,%xmm0
L73:
  mov    0x48(%rsp),%rax
  cmpb   $0x0,(%rax,%rbx,1)
  jne    L27
  movsd  0x0(%rbp,%rbx,8),%xmm1
  comisd %xmm0,%xmm1
  jbe    L27
  movapd %xmm1,%xmm0
  jmp    L54
L100:
  addl   $0x1,0x54(%rsp)
  mov    0x54(%rsp),%eax
  cmp    %eax,0xb0(%rsp)
  je     L26
L6:
  mov    0x58(%rsp),%r15
  mov    0xa8(%rsp),%eax
  mov    %rax,0x28(%rsp)
  mov    $0x0,%ebx
  cmpl   $0x0,0xa8(%rsp)
  jg     L82
  jmp    L100
```

assistant: ```c
void relax(double *pos, long *links, double *mrel1, double *mrel2, double *lengths, char *push, char *pull, int nlinks, int iters) {
  int i, l, p1, p2;
  double x1, x2, y1, y2, dx, dy, dist, change;
  for (i = 0; i < iters; i++) {
    for (l = 0; l < nlinks; l++) {
      p1 = 2 * links[l * 2];
      p2 = 2 * links[l * 2 + 1];
      x1 = pos[p1];
      y1 = pos[p1 + 1];
      x2 = pos[p2];
      y2 = pos[p2 + 1];
      dx = x2 - x1;
      dy = y2 - y1;
      dist = sqrt(dx * dx + dy * dy);
      if (push[l] == 0 && dist < lengths[l])
        dist = lengths[l];
      if (pull[l] == 0 && dist > lengths[l])
        dist = lengths[l];
      change = (lengths[l] - dist) / dist;
      dx *= change;
      dy *= change;
      pos[p1] -= mrel2[l] * dx;
      pos[p1 + 1] -= mrel2[l] * dy;
      pos[p2] += mrel1[l] * dx;
      pos[p2 + 1] += mrel1[l] * dy;
    }
  }
}
```