user: 这段汇编代码用C语言表示是什么样的？

```asm
<merge_matrix_3fts>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %edi,%ebx
  sub    $0x10,%rsp
  mov    %edi,-0x24(%rsp)
  lea    (%rdi,%rdi,4),%edi
  mov    %r8,-0x8(%rsp)
  lea    (%rbx,%rbx,2),%r8d
  lea    (%rbx,%rdi,2),%eax
  mov    %rsi,-0x20(%rsp)
  add    %r8d,%r8d
  mov    %rdx,-0x18(%rsp)
  mov    %rcx,-0x10(%rsp)
  mov    %r9,(%rsp)
  mov    %edi,0x8(%rsp)
  test   %ebx,%ebx
  jle    L67
  lea    0x0(,%rdi,4),%esi
  mov    %edi,%edx
  cltq
  movslq %edi,%r9
  add    %esi,%edx
  mov    %esi,0xc(%rsp)
  movslq %r8d,%r8
  shl    $0x3,%r9
  movslq %edx,%rsi
  imul   $0x79,%ebx,%edx
  shl    $0x3,%r8
  lea    0x0(,%rax,8),%r10
  mov    %rsi,-0x48(%rsp)
  movq   $0x0,-0x50(%rsp)
  movslq %edx,%rsi
  imul   $0x42,%ebx,%edx
  movq   $0x0,-0x58(%rsp)
  mov    %rsi,-0x40(%rsp)
  movq   $0x0,-0x60(%rsp)
  movslq %edx,%rsi
  imul   $0x1e,%ebx,%edx
  movq   $0x0,-0x70(%rsp)
  mov    %rsi,-0x68(%rsp)
  movl   $0x0,-0x28(%rsp)
  movslq %edx,%rsi
  lea    (%rbx,%rbx,8),%edx
  shl    $0x2,%edx
  mov    %rsi,-0x38(%rsp)
  movslq %edx,%rbx
  lea    0x0(,%rax,4),%rdx
  sub    %rdx,%rax
  mov    %rbx,-0x30(%rsp)
  xor    %ebx,%ebx
  shl    $0x4,%rax
  mov    %rax,%r15
L1:
  mov    -0x8(%rsp),%rax
  mov    -0x70(%rsp),%rdi
  lea    (%rax,%rdi,8),%r14
  mov    (%rsp),%rax
  mov    -0x68(%rsp),%rdi
  lea    (%rax,%rdi,8),%r11
  mov    -0x10(%rsp),%rax
  mov    -0x60(%rsp),%rdi
  lea    (%rax,%rdi,8),%r13
  mov    -0x18(%rsp),%rax
  mov    -0x58(%rsp),%rdi
  lea    (%rax,%rdi,8),%r12
  mov    -0x20(%rsp),%rax
  mov    -0x50(%rsp),%rdi
  lea    (%rax,%rdi,8),%rbp
  mov    0x8(%rsp),%eax
  add    %ebx,%eax
  mov    %eax,-0x74(%rsp)
  cs nopw 0x0(%rax,%rax,1)
L37:
  lea    (%r11,%r15,1),%rdx
  mov    %rbp,%rcx
  mov    %r12,%rsi
  mov    $0x6,%edi
  nop
L16:
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L44:
  movsd  (%rcx,%rax,1),%xmm0
  movsd  %xmm0,(%rdx,%rax,1)
  add    $0x8,%rax
  cmp    $0x30,%rax
  jne    L44
  xor    %eax,%eax
L26:
  movsd  (%rsi,%rax,1),%xmm0
  movsd  %xmm0,0x30(%rdx,%rax,1)
  add    $0x8,%rax
  cmp    $0x28,%rax
  jne    L26
  add    %r9,%rsi
  add    %r10,%rdx
  add    %r8,%rcx
  sub    $0x1,%edi
  jne    L16
  mov    %r13,%rcx
  mov    %r11,%rdx
  mov    %r14,%rsi
  mov    $0x5,%edi
L12:
  xor    %eax,%eax
  nopl   0x0(%rax)
L45:
  movsd  (%rcx,%rax,1),%xmm0
  movsd  %xmm0,(%rdx,%rax,1)
  add    $0x8,%rax
  cmp    $0x30,%rax
  jne    L45
  xor    %eax,%eax
L66:
  movsd  (%rsi,%rax,1),%xmm0
  movsd  %xmm0,0x30(%rdx,%rax,1)
  add    $0x8,%rax
  cmp    $0x28,%rax
  jne    L66
  add    %r9,%rsi
  add    %r10,%rdx
  add    %r8,%rcx
  sub    $0x1,%edi
  jne    L12
  add    $0x5,%ebx
  add    $0x28,%r14
  add    $0x58,%r11
  add    $0x30,%r13
  add    $0x28,%r12
  add    $0x30,%rbp
  cmp    -0x74(%rsp),%ebx
  jne    L37
  mov    -0x48(%rsp),%rsi
  addl   $0x1,-0x28(%rsp)
  add    %rsi,-0x70(%rsp)
  mov    -0x28(%rsp),%eax
  mov    -0x40(%rsp),%rsi
  add    0xc(%rsp),%ebx
  add    %rsi,-0x68(%rsp)
  mov    -0x38(%rsp),%rsi
  add    %rsi,-0x60(%rsp)
  add    %rsi,-0x58(%rsp)
  mov    -0x30(%rsp),%rsi
  add    %rsi,-0x50(%rsp)
  cmp    %eax,-0x24(%rsp)
  jne    L1
L67:
  add    $0x10,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void merge_matrix_3fts(int np, const double *mat_ll, const double *mat_lh, const double *mat_hl, const double *mat_hh, double *mat) {
  int i, j;
  int ii, jj;
  int i11, i6, i5;
  int j11, j6, j5;
  int n11, n6, n5;
  n11 = np * 11;
  n6 = np * 6;
  n5 = np * 5;
  for (i = 0; i < np; ++i) {
    i11 = i * 11;
    i6 = i * 6;
    i5 = i * 5;
    for (j = 0; j < np; ++j) {
      j11 = j * 11;
      j6 = j * 6;
      j5 = j * 5;
      for (ii = 0; ii < 6; ++ii) {
        for (jj = 0; jj < 6; ++jj) {
          mat[(i11 + ii) * n11 + j11 + jj] = mat_ll[(i6 + ii) * n6 + j6 + jj];
        }
        for (jj = 0; jj < 5; ++jj) {
          mat[(i11 + ii) * n11 + j11 + 6 + jj] = mat_lh[(i6 + ii) * n5 + j5 + jj];
        }
      }
      for (ii = 0; ii < 5; ++ii) {
        for (jj = 0; jj < 6; ++jj) {
          mat[(i11 + 6 + ii) * n11 + j11 + jj] = mat_hl[(i5 + ii) * n6 + j6 + jj];
        }
        for (jj = 0; jj < 5; ++jj) {
          mat[(i11 + 6 + ii) * n11 + j11 + 6 + jj] = mat_hh[(i5 + ii) * n5 + j5 + jj];
        }
      }
    }
  }
}
```