user: Demonstrate the C code that generates the assembly output below:

```asm
<fndsep>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  add    $0xffffffffffffff80,%rsp
  mov    %edi,-0x44(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %rdx,-0x58(%rbp)
  mov    %rcx,-0x60(%rbp)
  mov    %r8,-0x68(%rbp)
  mov    %r9,-0x70(%rbp)
  mov    0x10(%rbp),%rax
  mov    %rax,-0x78(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0xffffffff,-0x2c(%rbp)
  mov    -0x78(%rbp),%rdx
  mov    0x18(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <zeroi@plt>
  mov    -0x70(%rbp),%r8
  mov    -0x68(%rbp),%rdi
  lea    -0x40(%rbp),%rcx
  mov    -0x58(%rbp),%rdx
  mov    -0x50(%rbp),%rsi
  mov    -0x44(%rbp),%eax
  mov    %r8,%r9
  mov    %rdi,%r8
  mov    %eax,%edi
  call   <fnroot@plt>
  mov    %eax,-0x44(%rbp)
  mov    -0x40(%rbp),%eax
  cmp    $0x5,%eax
  jg     L51
  mov    -0x40(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x70(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x68(%rbp),%r8
  mov    -0x58(%rbp),%rdi
  mov    -0x60(%rbp),%rcx
  mov    -0x50(%rbp),%rdx
  mov    -0x14(%rbp),%esi
  mov    -0x3c(%rbp),%eax
  sub    $0x8,%rsp
  push   -0x78(%rbp)
  mov    %r8,%r9
  mov    %rdi,%r8
  mov    %eax,%edi
  call   <subrcm@plt>
  add    $0x10,%rsp
  movl   $0x0,-0x38(%rbp)
  jmp    L13
L106:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x70(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x60(%rbp),%rax
  add    %rax,%rdx
  mov    -0x14(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    -0x14(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x58(%rbp),%rdx
  add    %rcx,%rdx
  or     -0x2c(%rbp),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x38(%rbp)
L13:
  mov    -0x38(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L106
  mov    -0x3c(%rbp),%eax
  jmp    L110
L51:
  mov    -0x40(%rbp),%eax
  add    $0x2,%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  mov    %eax,-0x28(%rbp)
  mov    -0x40(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x34(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  mov    %eax,-0x24(%rbp)
  movl   $0x0,-0x30(%rbp)
  movl   $0x0,-0x34(%rbp)
  jmp    L30
L17:
  mov    -0x30(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jge    L165
  mov    -0x34(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    -0x34(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x68(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rdx),%edx
  sub    %edx,%eax
  add    %eax,-0x30(%rbp)
L165:
  addl   $0x1,-0x34(%rbp)
L30:
  mov    -0x40(%rbp),%eax
  cmp    %eax,-0x34(%rbp)
  jge    L144
  mov    -0x30(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L17
L144:
  subl   $0x1,-0x34(%rbp)
  mov    -0x34(%rbp),%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x28(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x28(%rbp),%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  jmp    L115
L74:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x70(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x78(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    -0x14(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x78(%rbp),%rdx
  add    %rcx,%rdx
  or     -0x2c(%rbp),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x38(%rbp)
L115:
  mov    -0x38(%rbp),%eax
  cmp    -0x18(%rbp),%eax
  jl     L74
  movl   $0x0,-0x3c(%rbp)
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  jmp    L131
L154:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x70(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,-0x10(%rbp)
  jmp    L53
L123:
  mov    -0x10(%rbp),%rax
  mov    (%rax),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x78(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  test   %eax,%eax
  jns    L155
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x60(%rbp),%rax
  add    %rax,%rdx
  mov    -0x14(%rbp),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x3c(%rbp)
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    -0x14(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x58(%rbp),%rdx
  add    %rcx,%rdx
  or     -0x2c(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x14(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,-0x10(%rbp)
L155:
  addq   $0x4,-0x10(%rbp)
L53:
  mov    -0x14(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  cmp    %rax,-0x10(%rbp)
  jb     L123
  addl   $0x1,-0x38(%rbp)
L131:
  mov    -0x38(%rbp),%eax
  cmp    -0x1c(%rbp),%eax
  jl     L154
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  jmp    L99
L122:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x70(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x78(%rbp),%rax
  add    %rdx,%rax
  movl   $0x0,(%rax)
  addl   $0x1,-0x38(%rbp)
L99:
  mov    -0x38(%rbp),%eax
  cmp    -0x18(%rbp),%eax
  jl     L122
  mov    -0x3c(%rbp),%eax
L110:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L127
  call   <__stack_chk_fail@plt>
L127:
  leave
  ret
```

assistant: ```c
int fndsep(int root, int **padj, int *mask, int *sep, int *xls, int *ls, int *work, int neqns) {
  int nlvl, nsep, i, node, midlvl, midbeg, mp1beg, mp1end;
  int *ptr;
  int minone = -1;
  zeroi(neqns, work);
  root = fnroot(root, padj, mask, &nlvl, xls, ls);
  if (nlvl < 6) {
    nsep = xls[nlvl + 1];
    node = ls[0];
    subrcm(nsep, node, padj, sep, mask, xls, work);
    for (i = 0; i < nsep; i++) {
      node = ls[i];
      sep[i] = node;
      mask[node] |= minone;
    }
    return (nsep);
  }
  midlvl = (nlvl + 2) / 2;
  {
    int j, k, l;
    ;
    k = xls[nlvl];
    j = k / 2;
    l = 0;
    for (k = 0; k < nlvl && l < j; k++) {
      if (l < j) {
        l += (xls[k + 1] - xls[k]);
      }
    }
    k--;
    midlvl = k;
    midbeg = xls[midlvl];
    mp1beg = xls[midlvl + 1];
    mp1end = xls[midlvl + 2];
  }
  for (i = mp1beg; i < mp1end; i++) {
    node = ls[i];
    work[node] |= minone;
  }
  nsep = 0;
  for (i = midbeg; i < mp1beg; i++) {
    node = ls[i];
    for (ptr = padj[node]; ptr < padj[node + 1]; ptr++) {
      if (work[*ptr] < 0) {
        sep[nsep] = node;
        nsep++;
        mask[node] |= minone;
        ptr = padj[node + 1];
      }
    }
  }
  for (i = mp1beg; i < mp1end; i++) {
    node = ls[i];
    work[i] &= 0;
  }
  return (nsep);
}
```