user: 这段汇编代码用C语言表示是什么样的:

```asm
<pencil_dtrmv_n_nun>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  sub    $0x60,%rsp
  mov    %edi,-0x54(%rbp)
  mov    %esi,-0x58(%rbp)
  mov    %rdx,-0x60(%rbp)
  mov    %ecx,-0x64(%rbp)
  mov    %r8,-0x70(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x28(%rbp)
  xor    %eax,%eax
  mov    -0x54(%rbp),%esi
  movslq %esi,%rax
  sub    $0x1,%rax
  mov    %rax,-0x48(%rbp)
  movslq %esi,%rax
  mov    %rax,-0x80(%rbp)
  movq   $0x0,-0x78(%rbp)
  mov    -0x64(%rbp),%ecx
  movslq %ecx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x40(%rbp)
  movslq %ecx,%rax
  mov    %rax,%r14
  mov    $0x0,%r15d
  movl   $0x0,-0x50(%rbp)
  jmp    L49
L70:
  mov    %rsp,%rax
  mov    %rax,%r8
  mov    -0x54(%rbp),%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x38(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  movslq %eax,%rdx
  mov    %rdx,%r12
  mov    $0x0,%r13d
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%edi
  mov    $0x0,%edx
  div    %rdi
  imul   $0x10,%rax,%rax
  mov    %rax,%rdi
  and    $0xfffffffffffff000,%rdi
  mov    %rsp,%rdx
  sub    %rdi,%rdx
L42:
  cmp    %rdx,%rsp
  je     L0
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L42
L0:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L34
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L34:
  mov    %rsp,%rax
  add    $0x7,%rax
  shr    $0x3,%rax
  shl    $0x3,%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x30(%rbp),%rax
  mov    -0x50(%rbp),%edx
  movslq %edx,%rdx
  pxor   %xmm0,%xmm0
  movsd  %xmm0,(%rax,%rdx,8)
  movl   $0x0,-0x4c(%rbp)
  jmp    L79
L59:
  mov    -0x30(%rbp),%rax
  mov    -0x50(%rbp),%edx
  movslq %edx,%rdx
  movsd  (%rax,%rdx,8),%xmm1
  mov    -0x50(%rbp),%eax
  movslq %eax,%rdx
  movslq %esi,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x60(%rbp),%rax
  add    %rax,%rdx
  mov    -0x50(%rbp),%edi
  mov    -0x4c(%rbp),%eax
  add    %edi,%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm2
  mov    -0x50(%rbp),%edx
  mov    -0x4c(%rbp),%eax
  add    %edx,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x70(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x30(%rbp),%rax
  mov    -0x50(%rbp),%edx
  movslq %edx,%rdx
  movsd  %xmm0,(%rax,%rdx,8)
  addl   $0x1,-0x4c(%rbp)
L79:
  mov    -0x54(%rbp),%eax
  sub    $0x1,%eax
  sub    -0x50(%rbp),%eax
  cmp    %eax,-0x4c(%rbp)
  jle    L59
  mov    -0x50(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x70(%rbp),%rax
  lea    (%rdx,%rax,1),%rdi
  mov    -0x30(%rbp),%rax
  mov    -0x50(%rbp),%edx
  movslq %edx,%rdx
  movsd  (%rax,%rdx,8),%xmm0
  movsd  %xmm0,(%rdi)
  mov    %r8,%rsp
  addl   $0x1,-0x50(%rbp)
L49:
  mov    -0x54(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jg     L70
  nop
  mov    -0x28(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L3
  call   <__stack_chk_fail@plt>
L3:
  lea    -0x20(%rbp),%rsp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
void pencil_dtrmv_n_nun(int n_8292_8308, int ldAT_8293_8309, double AT_8294_8310[restrict const n_8292_8308][n_8292_8308], int incX_8295_8311, double X_8296_8312[restrict const n_8292_8308][incX_8295_8311]) {
#pragma scop
  {
    for (int i_2447_1705_4072_10751 = 0; i_2447_1705_4072_10751 <= (n_8292_8308 - 1); i_2447_1705_4072_10751 += 1) {
      double accum_2449_1707_4073_10750[n_8292_8308];
      accum_2449_1707_4073_10750[i_2447_1705_4072_10751] = 0.0;
      for (int i_2450_1708_4074_10752 = 0; i_2450_1708_4074_10752 <= ((((n_8292_8308 - 1) - i_2447_1705_4072_10751) + 1) - 1); i_2450_1708_4074_10752 += 1) {
        accum_2449_1707_4073_10750[i_2447_1705_4072_10751] = (accum_2449_1707_4073_10750[i_2447_1705_4072_10751] + (AT_8294_8310[i_2447_1705_4072_10751][(i_2447_1705_4072_10751 + i_2450_1708_4074_10752)] * X_8296_8312[(i_2447_1705_4072_10751 + i_2450_1708_4074_10752)][0]));
      }
      X_8296_8312[i_2447_1705_4072_10751][0] = accum_2449_1707_4073_10750[i_2447_1705_4072_10751];
    }
  }
#pragma endscop
}
```