user: What is the c source code of the assembly code below:

```asm
<kernel_lu>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %edi,-0x14(%rbp)
  mov    %rsi,-0x20(%rbp)
  movl   $0x0,-0xc(%rbp)
  jmp    L12
L6:
  movl   $0x0,-0x8(%rbp)
  jmp    L56
L87:
  movl   $0x0,-0x4(%rbp)
  jmp    L78
L23:
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x4(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm2
  mov    -0x4(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  mulsd  %xmm2,%xmm1
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  subsd  %xmm1,%xmm0
  mov    -0x8(%rbp),%eax
  cltq
  movsd  %xmm0,(%rdx,%rax,8)
  addl   $0x1,-0x4(%rbp)
L78:
  mov    -0x4(%rbp),%eax
  cmp    -0x8(%rbp),%eax
  jl     L23
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  mov    -0x8(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  divsd  %xmm1,%xmm0
  mov    -0x8(%rbp),%eax
  cltq
  movsd  %xmm0,(%rdx,%rax,8)
  addl   $0x1,-0x8(%rbp)
L56:
  mov    -0x8(%rbp),%eax
  cmp    -0xc(%rbp),%eax
  jl     L87
  mov    -0xc(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L98
L81:
  movl   $0x0,-0x4(%rbp)
  jmp    L70
L37:
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x4(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm2
  mov    -0x4(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  mulsd  %xmm2,%xmm1
  mov    -0xc(%rbp),%eax
  cltq
  imul   $0x3e80,%rax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  subsd  %xmm1,%xmm0
  mov    -0x8(%rbp),%eax
  cltq
  movsd  %xmm0,(%rdx,%rax,8)
  addl   $0x1,-0x4(%rbp)
L70:
  mov    -0x4(%rbp),%eax
  cmp    -0xc(%rbp),%eax
  jl     L37
  addl   $0x1,-0x8(%rbp)
L98:
  mov    -0x8(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jl     L81
  addl   $0x1,-0xc(%rbp)
L12:
  mov    -0xc(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jl     L6
  nop
  nop
  pop    %rbp
  ret
```

assistant: ```c
void kernel_lu(int n, double A[2000 + 0][2000 + 0]) {
  int i, j, k;
#pragma scop
  for (i = 0; i < n; i++) {
    for (j = 0; j < i; j++) {
      for (k = 0; k < j; k++) {
        A[i][j] -= A[i][k] * A[k][j];
      }
      A[i][j] /= A[j][j];
    }
    for (j = i; j < n; j++) {
      for (k = 0; k < i; k++) {
        A[i][j] -= A[i][k] * A[k][j];
      }
    }
  }
#pragma endscop
}
```