user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<mm3x3>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  add    $0xffffffffffffff80,%rsp
  mov    %rdi,-0xe8(%rbp)
  mov    %rsi,-0xf0(%rbp)
  mov    %rdx,-0xf8(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xd8(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xd0(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xc8(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xc0(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xb8(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xb0(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xa8(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0xa0(%rbp)
  mov    -0xe8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xe8(%rbp)
  mov    %rax,-0x98(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x90(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x88(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x80(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x78(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x70(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x68(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x60(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x58(%rbp)
  mov    -0xf0(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf0(%rbp)
  mov    %rax,-0x50(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x48(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x40(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x38(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x30(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x28(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x20(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x18(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x10(%rbp)
  mov    -0xf8(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    %rdx,-0xf8(%rbp)
  mov    %rax,-0x8(%rbp)
  mov    -0xd8(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x90(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xc0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x88(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0xa8(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x80(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x48(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xd8(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x78(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xc0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x70(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0xa8(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x68(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x30(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xd8(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x60(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xc0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x58(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0xa8(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x50(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x18(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xd0(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x90(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xb8(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x88(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0xa0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x80(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x40(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xd0(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x78(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xb8(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x70(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0xa0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x68(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x28(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xd0(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x60(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xb8(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x58(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0xa0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x50(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x10(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xc8(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x90(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xb0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x88(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x98(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x80(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x38(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xc8(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x78(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xb0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x70(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x98(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x68(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x20(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0xc8(%rbp),%rax
  movsd  (%rax),%xmm1
  mov    -0x60(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0xb0(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x58(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x98(%rbp),%rax
  movsd  (%rax),%xmm2
  mov    -0x50(%rbp),%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x8(%rbp),%rax
  movsd  %xmm0,(%rax)
  nop
  leave
  ret
```

assistant: ```c
void mm3x3(double *restrict a, double *restrict b, double *restrict c) {
  double *a00 __attribute__((unused)) = a++;
  double *a10 __attribute__((unused)) = a++;
  double *a20 __attribute__((unused)) = a++;
  double *a01 __attribute__((unused)) = a++;
  double *a11 __attribute__((unused)) = a++;
  double *a21 __attribute__((unused)) = a++;
  double *a02 __attribute__((unused)) = a++;
  double *a12 __attribute__((unused)) = a++;
  double *a22 __attribute__((unused)) = a++;
  ;
  double *b00 __attribute__((unused)) = b++;
  double *b10 __attribute__((unused)) = b++;
  double *b20 __attribute__((unused)) = b++;
  double *b01 __attribute__((unused)) = b++;
  double *b11 __attribute__((unused)) = b++;
  double *b21 __attribute__((unused)) = b++;
  double *b02 __attribute__((unused)) = b++;
  double *b12 __attribute__((unused)) = b++;
  double *b22 __attribute__((unused)) = b++;
  ;
  double *c00 __attribute__((unused)) = c++;
  double *c10 __attribute__((unused)) = c++;
  double *c20 __attribute__((unused)) = c++;
  double *c01 __attribute__((unused)) = c++;
  double *c11 __attribute__((unused)) = c++;
  double *c21 __attribute__((unused)) = c++;
  double *c02 __attribute__((unused)) = c++;
  double *c12 __attribute__((unused)) = c++;
  double *c22 __attribute__((unused)) = c++;
  ;
  *c00 = *a00 * *b00 + *a01 * *b10 + *a02 * *b20;
  *c01 = *a00 * *b01 + *a01 * *b11 + *a02 * *b21;
  *c02 = *a00 * *b02 + *a01 * *b12 + *a02 * *b22;
  *c10 = *a10 * *b00 + *a11 * *b10 + *a12 * *b20;
  *c11 = *a10 * *b01 + *a11 * *b11 + *a12 * *b21;
  *c12 = *a10 * *b02 + *a11 * *b12 + *a12 * *b22;
  *c20 = *a20 * *b00 + *a21 * *b10 + *a22 * *b20;
  *c21 = *a20 * *b01 + *a21 * *b11 + *a22 * *b21;
  *c22 = *a20 * *b02 + *a21 * *b12 + *a22 * *b22;
}
```