user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<mp_mul>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %edi,-0x14(%rbp)
  mov    %esi,-0x18(%rbp)
  mov    %rdx,-0x20(%rbp)
  mov    %rcx,-0x28(%rbp)
  mov    %r8,-0x30(%rbp)
  mov    %r9,-0x38(%rbp)
  mov    0x10(%rbp),%eax
  sar    %eax
  add    $0x1,%eax
  mov    %eax,-0x4(%rbp)
  jmp    L49
L40:
  mov    -0x4(%rbp),%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x4(%rbp),%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,4),%rcx
  mov    -0x28(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  add    %edx,%eax
  test   %eax,%eax
  jne    L33
  addl   $0x1,-0x4(%rbp)
L49:
  mov    -0x14(%rbp),%eax
  cmp    -0x4(%rbp),%eax
  jg     L40
  jmp    L23
L33:
  nop
L23:
  mov    -0x14(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  add    $0x1,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x14(%rbp),%eax
  sub    -0x4(%rbp),%eax
  cmp    %eax,-0x8(%rbp)
  jge    L0
  mov    -0x14(%rbp),%eax
  sub    -0x4(%rbp),%eax
  mov    %eax,-0x8(%rbp)
L0:
  mov    0x18(%rbp),%rcx
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%esi
  mov    -0x14(%rbp),%eax
  mov    %rcx,%r9
  mov    %rdx,%r8
  mov    $0x0,%ecx
  mov    0x10(%rbp),%edx
  mov    %eax,%edi
  call   <mp_mul_i2d@plt>
  mov    0x18(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    0x38(%rbp),%rcx
  mov    0x30(%rbp),%rax
  mov    %rcx,%r8
  mov    %rax,%rcx
  mov    $0x1,%esi
  mov    0x10(%rbp),%edi
  call   <rdft@plt>
  mov    0x28(%rbp),%rdi
  mov    -0x28(%rbp),%rcx
  mov    -0x4(%rbp),%edx
  mov    -0x18(%rbp),%esi
  mov    -0x14(%rbp),%eax
  mov    %rdi,%r9
  mov    %rcx,%r8
  mov    %edx,%ecx
  mov    0x10(%rbp),%edx
  mov    %eax,%edi
  call   <mp_mul_i2d@plt>
  mov    0x28(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    0x38(%rbp),%rcx
  mov    0x30(%rbp),%rax
  mov    %rcx,%r8
  mov    %rax,%rcx
  mov    $0x1,%esi
  mov    0x10(%rbp),%edi
  call   <rdft@plt>
  mov    0x28(%rbp),%rdx
  mov    0x18(%rbp),%rax
  mov    %rax,%rsi
  mov    0x10(%rbp),%edi
  call   <mp_mul_cmul@plt>
  mov    0x20(%rbp),%rcx
  mov    -0x28(%rbp),%rdx
  mov    -0x18(%rbp),%esi
  mov    -0x14(%rbp),%eax
  mov    %rcx,%r9
  mov    %rdx,%r8
  mov    $0x0,%ecx
  mov    0x10(%rbp),%edx
  mov    %eax,%edi
  call   <mp_mul_i2d@plt>
  mov    0x20(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    0x38(%rbp),%rcx
  mov    0x30(%rbp),%rax
  mov    %rcx,%r8
  mov    %rax,%rcx
  mov    $0x1,%esi
  mov    0x10(%rbp),%edi
  call   <rdft@plt>
  mov    0x18(%rbp),%rdx
  mov    0x20(%rbp),%rax
  mov    %rax,%rsi
  mov    0x10(%rbp),%edi
  call   <mp_mul_cmul@plt>
  mov    0x18(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    0x38(%rbp),%rcx
  mov    0x30(%rbp),%rax
  mov    %rcx,%r8
  mov    %rax,%rcx
  mov    $0xffffffff,%esi
  mov    0x10(%rbp),%edi
  call   <rdft@plt>
  mov    -0x38(%rbp),%rcx
  mov    0x18(%rbp),%rdx
  mov    -0x18(%rbp),%esi
  mov    -0x14(%rbp),%eax
  mov    %rcx,%r8
  mov    %rdx,%rcx
  mov    0x10(%rbp),%edx
  mov    %eax,%edi
  call   <mp_mul_d2i@plt>
  mov    0x18(%rbp),%rdi
  mov    -0x20(%rbp),%rcx
  mov    -0x4(%rbp),%edx
  mov    -0x18(%rbp),%esi
  mov    -0x14(%rbp),%eax
  mov    %rdi,%r9
  mov    %rcx,%r8
  mov    %edx,%ecx
  mov    0x10(%rbp),%edx
  mov    %eax,%edi
  call   <mp_mul_i2d@plt>
  mov    0x18(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    0x38(%rbp),%rcx
  mov    0x30(%rbp),%rax
  mov    %rcx,%r8
  mov    %rax,%rcx
  mov    $0x1,%esi
  mov    0x10(%rbp),%edi
  call   <rdft@plt>
  mov    0x28(%rbp),%rcx
  mov    0x20(%rbp),%rdx
  mov    0x18(%rbp),%rax
  mov    %rax,%rsi
  mov    0x10(%rbp),%edi
  call   <mp_mul_cmuladd@plt>
  mov    0x28(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    0x38(%rbp),%rcx
  mov    0x30(%rbp),%rax
  mov    %rcx,%r8
  mov    %rax,%rcx
  mov    $0xffffffff,%esi
  mov    0x10(%rbp),%edi
  call   <rdft@plt>
  mov    -0x30(%rbp),%rcx
  mov    0x28(%rbp),%rdx
  mov    -0x18(%rbp),%esi
  mov    -0x8(%rbp),%eax
  mov    %rcx,%r8
  mov    %rdx,%rcx
  mov    0x10(%rbp),%edx
  mov    %eax,%edi
  call   <mp_mul_d2i@plt>
  mov    -0x30(%rbp),%rdi
  mov    -0x38(%rbp),%rcx
  mov    -0x30(%rbp),%rdx
  mov    -0x18(%rbp),%esi
  mov    -0x14(%rbp),%eax
  mov    %rdi,%r8
  mov    %eax,%edi
  call   <mp_add@plt>
  nop
  leave
  ret
```

assistant: ```c
void mp_mul(int n, int radix, int in1[], int in2[], int out[], int tmp[], int nfft, double tmp1fft[], double tmp2fft[], double tmp3fft[], int ip[], double w[]) {
  void mp_add(int n, int radix, int in1[], int in2[], int out[]);
  void rdft(int n, int isgn, double *a, int *ip, double *w);
  void mp_mul_i2d(int n, int radix, int nfft, int shift, int in[], double dout[]);
  void mp_mul_cmul(int nfft, double din[], double dinout[]);
  void mp_mul_cmuladd(int nfft, double din1[], double din2[], double dinout[]);
  void mp_mul_d2i(int n, int radix, int nfft, double din[], int out[]);
  int n_h, shift;
  shift = (nfft >> 1) + 1;
  while (n > shift) {
    if (in1[shift + 2] + in2[shift + 2] != 0) {
      break;
    }
    shift++;
  }
  n_h = n / 2 + 1;
  if (n_h < n - shift) {
    n_h = n - shift;
  }
  mp_mul_i2d(n, radix, nfft, 0, in1, tmp1fft);
  rdft(nfft, 1, &tmp1fft[1], ip, w);
  mp_mul_i2d(n, radix, nfft, shift, in2, tmp3fft);
  rdft(nfft, 1, &tmp3fft[1], ip, w);
  mp_mul_cmul(nfft, tmp1fft, tmp3fft);
  mp_mul_i2d(n, radix, nfft, 0, in2, tmp2fft);
  rdft(nfft, 1, &tmp2fft[1], ip, w);
  mp_mul_cmul(nfft, tmp2fft, tmp1fft);
  rdft(nfft, -1, &tmp1fft[1], ip, w);
  mp_mul_d2i(n, radix, nfft, tmp1fft, tmp);
  mp_mul_i2d(n, radix, nfft, shift, in1, tmp1fft);
  rdft(nfft, 1, &tmp1fft[1], ip, w);
  mp_mul_cmuladd(nfft, tmp1fft, tmp2fft, tmp3fft);
  rdft(nfft, -1, &tmp3fft[1], ip, w);
  mp_mul_d2i(n_h, radix, nfft, tmp3fft, out);
  mp_add(n, radix, out, tmp, out);
}
```