user: What would the C source look like for the assembly code provided here?

```asm
<relax_jacobi_plusresidual>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %edx,-0x34(%rbp)
  mov    %ecx,-0x38(%rbp)
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  movl   $0x1,-0x1c(%rbp)
  jmp    L16
L6:
  movl   $0x1,-0x20(%rbp)
  jmp    L34
L13:
  mov    -0x1c(%rbp),%eax
  sub    $0x1,%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x1c(%rbp),%eax
  add    $0x1,%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x1c(%rbp),%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  sub    $0x1,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x1c(%rbp),%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  add    $0x1,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm0,%xmm1
  mov    -0x1c(%rbp),%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  D8(%rip),%xmm0
  mulsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  mov    -0x1c(%rbp),%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0x1c(%rbp),%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  subsd  %xmm1,%xmm0
  movsd  %xmm0,-0x8(%rbp)
  movsd  -0x8(%rbp),%xmm0
  mulsd  %xmm0,%xmm0
  movsd  -0x18(%rbp),%xmm1
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  addl   $0x1,-0x20(%rbp)
L34:
  mov    -0x38(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    -0x20(%rbp),%eax
  cmp    %eax,%edx
  ja     L13
  addl   $0x1,-0x1c(%rbp)
L16:
  mov    -0x34(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    -0x1c(%rbp),%eax
  cmp    %eax,%edx
  ja     L6
  mov    -0x28(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x30(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,-0x30(%rbp)
  movsd  -0x18(%rbp),%xmm0
  movq   %xmm0,%rax
  movq   %rax,%xmm0
  pop    %rbp
  ret
```

tool_calls: name: parse_data
arguments: data_tag: D8
type: f64

tool: D8: 0.25

assistant: ```c
double relax_jacobi_plusresidual(double *u, double *utmp, unsigned sizex, unsigned sizey) {
  int i, j;
  double diff, sum = 0.0;
  for (j = 1; j < sizex - 1; j++) {
    for (i = 1; i < sizey - 1; i++) {
      utmp[i + j * sizey] = 0.25 * (u[i + (j - 1) * sizey] + u[i + (j + 1) * sizey] + u[(i - 1) + j * sizey] + u[(i + 1) + j * sizey]);
      diff = utmp[i + j * sizey] - u[i + j * sizey];
      sum += diff * diff;
    }
  }
  double *temp = u;
  u = utmp;
  utmp = temp;
  return sum;
}
```