user: 这段汇编代码用C语言表示是什么样的？

```asm
<fir_stereo>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r13
  push   %r12
  push   %rbx
  mov    %rdi,-0x30(%rbp)
  mov    %rsi,-0x38(%rbp)
  mov    %edx,-0x3c(%rbp)
  mov    %rcx,-0x48(%rbp)
  mov    %r8,-0x50(%rbp)
  mov    $0x0,%r12d
  mov    $0x0,%ebx
  mov    -0x3c(%rbp),%eax
  lea    0x7(%rax),%edx
  test   %eax,%eax
  cmovs  %edx,%eax
  sar    $0x3,%eax
  shl    $0x3,%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x3c(%rbp),%eax
  cltd
  shr    $0x1d,%edx
  add    %edx,%eax
  and    $0x7,%eax
  sub    %edx,%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%r13
  jmp    L7
L18:
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
L7:
  cmp    %r13,-0x38(%rbp)
  jne    L18
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%r13
  jmp    L31
L39:
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  add    %eax,%r12d
  mov    -0x30(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x30(%rbp)
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  mov    (%rax),%eax
  imul   %ecx,%eax
  add    %eax,%ebx
L31:
  cmp    %r13,-0x38(%rbp)
  jne    L39
  mov    -0x48(%rbp),%rax
  mov    %r12d,(%rax)
  mov    -0x50(%rbp),%rax
  mov    %ebx,(%rax)
  nop
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %rbp
  ret
```

assistant: ```c
void fir_stereo(int *inp, int *coep, int firlen, int *out1p, int *out2p) {
  register int akku1 = 0, akku2 = 0, *endp;
  int n1 = (firlen / 8) * 8, n0 = firlen % 8;
  endp = coep + n1;
  while (coep != endp) {
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
  }
  endp = coep + n0;
  while (coep != endp) {
    akku1 += *inp++ * *coep;
    akku2 += *inp++ * *coep++;
  }
  *out1p = akku1;
  *out2p = akku2;
}
```