user: 下面的汇编指令对应的C源代码是什么：

```asm
<lob_bnd_lin_3>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xb8,%rsp
  mov    %rdi,0x68(%rsp)
  mov    %rsi,0x40(%rsp)
  mov    %edx,%r11d
  mov    %edx,0x50(%rsp)
  mov    %ecx,%r13d
  mov    %r8,0x48(%rsp)
  mov    %r9d,%ebx
  mov    %r9d,0x54(%rsp)
  mov    0x100(%rsp),%r14d
  mov    0x120(%rsp),%r15
  mov    %r9d,%edi
  imul   %r14d,%edi
  mov    %edi,0x78(%rsp)
  mov    %ecx,%r10d
  imul   0xf0(%rsp),%r10d
  mov    %r10d,0x7c(%rsp)
  mov    0x108(%rsp),%ecx
  lea    (%rcx,%rcx,1),%edx
  mov    %r11d,%eax
  lea    0x0(,%rax,8),%r9
  mov    %r9,0x8(%rsp)
  add    %r9,%rsi
  mov    %rsi,0xa0(%rsp)
  lea    (%r11,%r11,1),%eax
  mov    %eax,%eax
  lea    (%rsi,%rax,8),%rax
  mov    %rax,%rsi
  mov    %rax,0x18(%rsp)
  mov    %r13d,%eax
  lea    (%rsi,%rax,8),%rax
  mov    %rax,0x20(%rsp)
  mov    %ebx,%eax
  lea    (%r8,%rax,8),%rsi
  mov    %rsi,0x28(%rsp)
  lea    (%rbx,%rbx,1),%eax
  mov    %eax,%eax
  lea    (%rsi,%rax,8),%r11
  mov    %r11,0x30(%rsp)
  mov    %ebx,%eax
  imul   0xf0(%rsp),%eax
  add    %eax,%eax
  mov    %eax,%eax
  mov    0xf0(%rsp),%esi
  add    %rsi,%rax
  lea    (%r11,%rax,8),%rax
  mov    %rax,0x38(%rsp)
  mov    %r14d,%eax
  mov    0xf8(%rsp),%rsi
  lea    (%rsi,%rax,8),%rsi
  mov    %rsi,0x80(%rsp)
  lea    (%r14,%r14,1),%eax
  mov    %eax,%eax
  lea    (%rsi,%rax,8),%r11
  mov    %r11,0x88(%rsp)
  mov    %r14d,%eax
  imul   %edx,%eax
  mov    %eax,%eax
  mov    0x108(%rsp),%esi
  add    %rsi,%rax
  lea    (%r11,%rax,8),%rax
  mov    %rax,0x90(%rsp)
  lea    (%r10,%r10,1),%eax
  mov    %eax,%eax
  shl    $0x3,%rax
  mov    %rax,0x10(%rsp)
  add    %r15,%rax
  mov    %rax,0x70(%rsp)
  cmpl   $0x0,0x118(%rsp)
  je     L50
  lea    0x0(%r13,%r13,1),%ecx
  mov    %ecx,%eax
  shl    $0x3,%rax
  mov    %rax,0x58(%rsp)
  imul   %ebx,%ecx
  mov    %ecx,%eax
  shl    $0x3,%rax
  mov    %rax,0x60(%rsp)
  imul   %r10d,%edx
  mov    %edx,%eax
  shl    $0x3,%rax
  mov    %rax,0x98(%rsp)
  lea    -0x1(%rdi),%eax
  add    $0x1,%rax
  imul   %r9,%rax
  mov    %rax,0xa8(%rsp)
  jmp    L17
L61:
  mov    %r14d,0x100(%rsp)
  mov    0x78(%rsp),%r14d
  mov    %r15,0x120(%rsp)
  mov    0xa0(%rsp),%r15
L12:
  push   %rbp
  push   %r13
  mov    0x60(%rsp),%r9d
  mov    0x30(%rsp),%r8
  mov    0x28(%rsp),%rcx
  mov    %r15,%rdx
  mov    0x50(%rsp),%rsi
  mov    %r12,%rdi
  call   <lob_bnd_fst@plt>
  add    $0x1,%ebx
  add    0x68(%rsp),%r12
  add    0x18(%rsp),%rbp
  add    $0x10,%rsp
  cmp    %ebx,%r14d
  jne    L12
  mov    0x100(%rsp),%r14d
  mov    0x120(%rsp),%r15
  mov    0xa8(%rsp),%rax
  add    %rax,0x110(%rsp)
L43:
  test   %r14d,%r14d
  je     L72
  mov    0x70(%rsp),%r12
  mov    0x68(%rsp),%rbp
  mov    $0x0,%ebx
L38:
  push   %r15
  push   %r13
  push   %rbp
  mov    0x108(%rsp),%eax
  push   %rax
  mov    0x74(%rsp),%r9d
  mov    0x58(%rsp),%r8
  mov    0x50(%rsp),%rcx
  mov    0x48(%rsp),%rdx
  mov    0x68(%rsp),%rsi
  mov    %r12,%rdi
  call   <lob_bnd_ext@plt>
  add    $0x1,%ebx
  add    0x80(%rsp),%rbp
  add    0x30(%rsp),%r12
  add    $0x20,%rsp
  cmp    %ebx,%r14d
  jne    L38
L72:
  push   %r15
  mov    0x84(%rsp),%eax
  push   %rax
  push   0x80(%rsp)
  mov    0x120(%rsp),%eax
  push   %rax
  mov    %r14d,%r9d
  mov    0xb0(%rsp),%r8
  mov    0xa8(%rsp),%rcx
  mov    0xa0(%rsp),%rdx
  mov    0x118(%rsp),%rsi
  mov    0x88(%rsp),%rbx
  mov    %rbx,%rdi
  call   <lob_bnd_ext@plt>
  mov    %rbx,%rax
  mov    0xb8(%rsp),%rdi
  add    %rdi,%rax
  mov    %rax,0x88(%rsp)
  add    $0x20,%rsp
  subl   $0x1,0x118(%rsp)
  je     L50
L17:
  mov    0x68(%rsp),%r12
  mov    0x110(%rsp),%rbp
  mov    $0x0,%ebx
  cmpl   $0x0,0x78(%rsp)
  jne    L61
  jmp    L43
L50:
  add    $0xb8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void lob_bnd_lin_3(double *restrict b, const double *lob_bnd_data_r, unsigned nr, unsigned mr, const double *lob_bnd_data_s, unsigned ns, unsigned ms, const double *lob_bnd_data_t, unsigned nt, unsigned mt, const double *restrict u, unsigned int un, double *restrict work) {
  unsigned nst = ns * nt, mrst = mr * ms * mt, mrs = mr * ms, mr_ns = mr * ns;
  const double *zr = lob_bnd_data_r, *Qr = zr + nr, *hr = Qr + 2 * nr, *lb_r = hr + mr;
  const double *zs = lob_bnd_data_s, *Qs = zs + ns, *hs = Qs + 2 * ns, *lbnp_s = hs + ms + 2 * ns * ms;
  const double *zt = lob_bnd_data_t, *Qt = zt + nt, *ht = Qt + 2 * nt, *lbnp_t = ht + mt + 2 * nt * mt;
  double *a = work, *bs = a + 2 * mr * ms;
  for (; un; --un, b += 2 * mrst) {
    double *br_, *bs_;
    unsigned i;
    for (i = 0, br_ = b; i < nst; ++i, br_ += 2 * mr, u += nr)
      lob_bnd_fst(br_, zr, Qr, hr, lb_r, nr, mr, u);
    for (i = 0, br_ = b, bs_ = bs; i < nt; ++i, br_ += 2 * mr_ns, bs_ += 2 * mrs)
      lob_bnd_ext(bs_, zs, Qs, hs, lbnp_s, ns, ms, br_, mr, a);
    lob_bnd_ext(b, zt, Qt, ht, lbnp_t, nt, mt, bs, mrs, a);
  }
}
```