user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<relax>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  movl   $0x1,-0x14(%rbp)
  mov    -0x44(%rbp),%eax
  sub    $0x1,%eax
  pxor   %xmm1,%xmm1
  cvtsi2sd %eax,%xmm1
  movsd  D18(%rip),%xmm0
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mulsd  %xmm0,%xmm0
  movsd  %xmm0,-0x8(%rbp)
  movl   $0x1,-0x20(%rbp)
  jmp    L31
L48:
  mov    -0x14(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  movl   $0x2,-0x18(%rbp)
  jmp    L56
L50:
  mov    -0x1c(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x24(%rbp)
  jmp    L49
L52:
  mov    -0x24(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x24(%rbp),%eax
  cltq
  shl    $0x3,%rax
  lea    -0x8(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x24(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x18(%rbp),%eax
  cltq
  add    $0x1,%rax
  shl    $0x3,%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x24(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x3,%rax
  sub    $0x8,%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm1,%xmm0
  mov    -0x24(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  movapd %xmm1,%xmm2
  mulsd  -0x8(%rbp),%xmm2
  movapd %xmm0,%xmm1
  subsd  %xmm2,%xmm1
  mov    -0x24(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %rdx,%rax
  movsd  D0(%rip),%xmm0
  mulsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x2,-0x24(%rbp)
L49:
  mov    -0x24(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jl     L52
  addl   $0x1,-0x18(%rbp)
  mov    $0x3,%eax
  sub    -0x1c(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
L56:
  mov    -0x18(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jl     L50
  addl   $0x1,-0x20(%rbp)
  mov    $0x3,%eax
  sub    -0x14(%rbp),%eax
  mov    %eax,-0x14(%rbp)
L31:
  cmpl   $0x2,-0x20(%rbp)
  jle    L48
  nop
  nop
  pop    %rbp
  ret
```

tool_calls: name: parse_data
arguments: tag: D18
data_type: f64
name: parse_data
arguments: tag: D0
data_type: f64

tool: D18: 1

tool: D0: 0.25

assistant: ```c
void relax(double **u, double **rhs, int n) {
  int i, ipass, isw, j, jsw = 1;
  double h, h2;
  h = 1.0 / (n - 1);
  h2 = h * h;
  for (ipass = 1; ipass <= 2; ipass++, jsw = 3 - jsw) {
    isw = jsw;
    for (j = 2; j < n; j++, isw = 3 - isw)
      for (i = isw + 1; i < n; i += 2)
        u[i][j] = 0.25 * (u[i + 1][j] + u[i - 1][j] + u[i][j + 1] + u[i][j - 1] - h2 * rhs[i][j]);
  }
}
```