user: 这段汇编代码用C语言表示是什么样的？

```asm
<RHS_fn>:
  endbr64
  push   %r15
  lea    -0x2(%rcx),%eax
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdx,-0x70(%rsp)
  mov    %eax,-0x38(%rsp)
  cmp    $0x1,%eax
  jle    L25
  lea    -0x1(%rcx),%r14d
  mov    %rdx,%rbx
  mov    %ecx,%edx
  movl   $0x1,-0x58(%rsp)
  movslq %r14d,%rax
  mov    %rbx,%rcx
  mov    %r14d,-0x34(%rsp)
  movsd  D1(%rip),%xmm2
  shl    $0x3,%rax
  mov    %r14d,-0x74(%rsp)
  movapd D1(%rip),%xmm3
  lea    0x8(%rax),%r8
  mov    %rax,%r15
  mov    %rax,-0x30(%rsp)
  lea    0x10(%rax),%rax
  mov    %rax,-0x60(%rsp)
  movslq %edx,%rax
  add    %r8,%rcx
  neg    %rax
  mov    %edx,-0x78(%rsp)
  lea    (%r15,%rax,8),%rax
  mov    %r8,-0x28(%rsp)
  add    %rax,%rbx
  mov    %rax,-0x40(%rsp)
  lea    0x18(%r15),%rax
  lea    (%rsi,%r8,1),%r15
  mov    %rbx,-0x48(%rsp)
  lea    -0x3(%rdx),%ebx
  mov    %rax,-0x68(%rsp)
  lea    (%rdi,%r8,1),%rax
  mov    %rax,-0x50(%rsp)
  mov    %ebx,%eax
  shr    %eax
  mov    %ebx,-0x1c(%rsp)
  sub    $0x1,%eax
  add    $0x1,%rax
  shl    $0x4,%rax
  mov    %rax,-0x18(%rsp)
  mov    %ebx,%eax
  or     $0x1,%ebx
  and    $0xfffffffe,%eax
  mov    %ebx,%r8d
  mov    %eax,-0x20(%rsp)
  lea    -0x4(%rdx),%eax
  shl    $0x3,%rax
  mov    %rax,-0x10(%rsp)
  nopl   0x0(%rax)
L71:
  mov    -0x68(%rsp),%rax
  mov    -0x50(%rsp),%r12
  mov    %rax,%r9
  lea    (%rax,%r15,1),%r10
  lea    (%rdi,%rax,1),%r11
  lea    (%rsi,%rax,1),%rbx
  mov    %rcx,%rax
  add    %r12,%r9
  sub    %r10,%rax
  cmp    $0x8,%rax
  mov    %rcx,%rax
  seta   %bpl
  sub    %r9,%rax
  cmp    $0x8,%rax
  seta   %al
  and    %ebp,%eax
  cmp    $0x4,%edx
  setne  %bpl
  and    %ebp,%eax
  mov    %rcx,%rbp
  sub    %r11,%rbp
  cmp    $0x8,%rbp
  seta   %bpl
  test   %bpl,%al
  je     L1
  mov    %rcx,%rax
  sub    %rbx,%rax
  cmp    $0x8,%rax
  jbe    L1
  mov    -0x60(%rsp),%rax
  mov    %r12,%r13
  mov    %edx,-0x54(%rsp)
  mov    -0x18(%rsp),%rdx
  lea    (%rdi,%rax,1),%r14
  add    %rax,%r13
  lea    (%r15,%rax,1),%r12
  lea    (%rsi,%rax,1),%rbp
  xor    %eax,%eax
  nopl   0x0(%rax,%rax,1)
L28:
  movupd (%r14,%rax,1),%xmm4
  movupd (%r11,%rax,1),%xmm0
  movupd (%r10,%rax,1),%xmm1
  movupd (%rbx,%rax,1),%xmm7
  subpd  %xmm4,%xmm0
  movupd (%r9,%rax,1),%xmm5
  movupd (%r12,%rax,1),%xmm4
  subpd  %xmm7,%xmm1
  movupd 0x0(%r13,%rax,1),%xmm6
  addpd  %xmm5,%xmm0
  movupd 0x0(%rbp,%rax,1),%xmm5
  addpd  %xmm4,%xmm1
  subpd  %xmm6,%xmm0
  subpd  %xmm5,%xmm1
  mulpd  %xmm3,%xmm0
  mulpd  %xmm3,%xmm1
  addpd  %xmm1,%xmm0
  movups %xmm0,(%rcx,%rax,1)
  add    $0x10,%rax
  cmp    %rdx,%rax
  jne    L28
  mov    -0x54(%rsp),%edx
  mov    -0x1c(%rsp),%ebx
  cmp    %ebx,-0x20(%rsp)
  je     L43
  mov    -0x78(%rsp),%eax
  mov    -0x74(%rsp),%ebx
  add    %r8d,%eax
  lea    (%rbx,%r8,1),%r11d
  movslq %eax,%r10
  lea    0x1(%rax,%rdx,1),%r9d
  add    %edx,%eax
  movslq %r11d,%r11
  cltq
  movslq %r9d,%r9
  movsd  0x8(%rdi,%r10,8),%xmm1
  subsd  (%rdi,%r10,8),%xmm1
  movsd  (%rsi,%r9,8),%xmm0
  addsd  (%rdi,%r9,8),%xmm1
  subsd  0x8(%rsi,%r10,8),%xmm0
  subsd  (%rdi,%rax,8),%xmm1
  addsd  (%rsi,%rax,8),%xmm0
  subsd  (%rsi,%r10,8),%xmm0
  mov    -0x70(%rsp),%rax
  mulsd  %xmm2,%xmm1
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax,%r11,8)
L43:
  mov    -0x28(%rsp),%r14
  mov    -0x34(%rsp),%r11d
  addl   $0x1,-0x58(%rsp)
  add    -0x30(%rsp),%rcx
  add    %r11d,-0x74(%rsp)
  mov    -0x58(%rsp),%eax
  mov    -0x40(%rsp),%r11
  add    %r14,-0x60(%rsp)
  add    %edx,-0x78(%rsp)
  add    %r11,-0x48(%rsp)
  add    %r14,-0x68(%rsp)
  cmp    %eax,-0x38(%rsp)
  jne    L71
L25:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L1:
  mov    -0x60(%rsp),%rax
  mov    -0x50(%rsp),%r10
  mov    -0x48(%rsp),%r11
  mov    -0x68(%rsp),%r9
  add    -0x10(%rsp),%r9
  nopl   0x0(%rax)
L56:
  movsd  0x8(%r15,%rax,1),%xmm0
  movsd  0x8(%rdi,%rax,1),%xmm1
  subsd  0x8(%rsi,%rax,1),%xmm0
  subsd  (%rdi,%rax,1),%xmm1
  addsd  (%r15,%rax,1),%xmm0
  addsd  0x8(%r10,%rax,1),%xmm1
  subsd  (%rsi,%rax,1),%xmm0
  subsd  (%r10,%rax,1),%xmm1
  mulsd  %xmm2,%xmm0
  mulsd  %xmm2,%xmm1
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%r11,%rax,1)
  add    $0x8,%rax
  cmp    %r9,%rax
  jne    L56
  jmp    L43
```

tool_calls: name: unpack_data
arguments: label: D1
datatype: f64[2]

tool: {"D1": [0.5,0.5]}

assistant: ```c
void RHS_fn(double *hx, double *hy, double *fn, int M) {
  int i, j, x, z;
  double dhx_dx, dhy_dy, phi, dp_dx, dp_dy, dphi_dx, dphi_dy;
  for (i = 1; i < M - 2; i++) {
    for (j = 1; j < M - 2; j++) {
      z = i * M + j;
      x = i * (M - 1) + j;
      dhx_dx = 0.5 * (1.0 / 1.0) * (hx[z + 1] - hx[z] + hx[z + 1 + M] - hx[z + M]);
      dhy_dy = 0.5 * (1.0 / 1.0) * (hy[z + 1 + M] - hy[z + 1] + hy[z + M] - hy[z]);
      fn[x] = dhx_dx + dhy_dy;
    }
  }
}
```