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

```asm
<boundaryvalues>:
  endbr64
  mov    %edi,%r9d
  mov    %esi,%r8d
  mov    %rdx,%rsi
  mov    %rcx,%rdx
  cmp    %r8d,%edi
  je     L32
  test   %edi,%edi
  jle    L27
  movslq %r8d,%rdi
  shl    $0x3,%rdi
  lea    0x8(%rdi),%r11
  lea    -0x1(%r9),%r10d
  add    $0x2,%r10
  mov    $0x1,%eax
  movq   D33(%rip),%xmm2
  movsd  D36(%rip),%xmm1
L65:
  mov    (%rsi,%rax,8),%rcx
  movsd  0x8(%rcx),%xmm0
  xorpd  %xmm2,%xmm0
  movsd  %xmm0,(%rcx)
  mov    (%rsi,%rax,8),%rcx
  movapd %xmm1,%xmm0
  subsd  (%rcx,%rdi,1),%xmm0
  movsd  %xmm0,(%rcx,%r11,1)
  mov    (%rdx,%rax,8),%rcx
  movq   $0x0,(%rcx)
  mov    (%rdx,%rax,8),%rcx
  movq   $0x0,(%rcx,%rdi,1)
  add    $0x1,%rax
  cmp    %r10,%rax
  jne    L65
L27:
  test   %r8d,%r8d
  jle    L3
  movslq %r9d,%r9
  shl    $0x3,%r9
  lea    (%rsi,%r9,1),%r11
  lea    (%rdx,%r9,1),%r10
  lea    0x8(%rdx,%r9,1),%r9
  lea    -0x1(%r8),%eax
  lea    0x10(,%rax,8),%r8
  mov    $0x8,%eax
  movq   D33(%rip),%xmm1
L61:
  mov    (%rsi),%rcx
  movq   $0x0,(%rcx,%rax,1)
  mov    (%r11),%rcx
  movq   $0x0,(%rcx,%rax,1)
  mov    (%rdx),%rcx
  mov    0x8(%rdx),%rdi
  movsd  (%rdi,%rax,1),%xmm0
  xorpd  %xmm1,%xmm0
  movsd  %xmm0,(%rcx,%rax,1)
  mov    (%r9),%rcx
  mov    (%r10),%rdi
  movsd  (%rdi,%rax,1),%xmm0
  xorpd  %xmm1,%xmm0
  movsd  %xmm0,(%rcx,%rax,1)
  add    $0x8,%rax
  cmp    %r8,%rax
  jne    L61
  ret
L32:
  test   %edi,%edi
  jle    L3
  push   %r14
  push   %rbx
  movslq %edi,%rdi
  shl    $0x3,%rdi
  lea    0x8(%rdi),%r8
  lea    (%rsi,%rdi,1),%rbx
  lea    (%rcx,%rdi,1),%r11
  lea    (%rcx,%r8,1),%r10
  lea    -0x1(%r9),%eax
  lea    0x10(,%rax,8),%r9
  mov    $0x8,%eax
  movq   D33(%rip),%xmm1
  movsd  D36(%rip),%xmm2
L0:
  mov    (%rsi,%rax,1),%rcx
  movsd  0x8(%rcx),%xmm0
  xorpd  %xmm1,%xmm0
  movsd  %xmm0,(%rcx)
  mov    (%rsi,%rax,1),%rcx
  movapd %xmm2,%xmm0
  subsd  (%rcx,%rdi,1),%xmm0
  movsd  %xmm0,(%rcx,%r8,1)
  mov    (%rsi),%rcx
  movq   $0x0,(%rcx,%rax,1)
  mov    (%rbx),%rcx
  movq   $0x0,(%rcx,%rax,1)
  mov    (%rdx,%rax,1),%rcx
  movq   $0x0,(%rcx)
  mov    (%rdx,%rax,1),%rcx
  movq   $0x0,(%rcx,%rdi,1)
  mov    (%rdx),%rcx
  mov    0x8(%rdx),%r14
  movsd  (%r14,%rax,1),%xmm0
  xorpd  %xmm1,%xmm0
  movsd  %xmm0,(%rcx,%rax,1)
  mov    (%r10),%rcx
  mov    (%r11),%r14
  movsd  (%r14,%rax,1),%xmm0
  xorpd  %xmm1,%xmm0
  movsd  %xmm0,(%rcx,%rax,1)
  add    $0x8,%rax
  cmp    %rax,%r9
  jne    L0
  pop    %rbx
  pop    %r14
  ret
L3:
  ret
```

tool_calls: name: parse_data
arguments: data_tag: D33
datatype: byte[8]
name: parse_data
arguments: data_tag: D36
datatype: f64

tool: {"D33": [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80]}

tool: D36: 2

assistant: ```c
void boundaryvalues(int imax, int jmax, double **U, double **V) {
  int i, j;
  if (imax == jmax) {
    for (i = 1; i < imax + 1; i++) {
      U[i][0] = -U[i][1];
      U[i][imax + 1] = 2.0 - U[i][imax];
      U[0][i] = 0;
      U[imax][i] = 0;
      V[i][0] = 0;
      V[i][imax] = 0;
      V[0][i] = -V[1][i];
      V[imax + 1][i] = -V[imax][i];
    }
  } else {
    for (i = 1; i < imax + 1; i++) {
      U[i][0] = -U[i][1];
      U[i][jmax + 1] = 2.0 - U[i][jmax];
      V[i][0] = 0;
      V[i][jmax] = 0;
    }
    for (j = 1; j < jmax + 1; j++) {
      U[0][j] = 0;
      U[imax][j] = 0;
      V[0][j] = -V[1][j];
      V[imax + 1][j] = -V[imax][j];
    }
  }
}
```