user: 这段汇编代码用C语言表示是什么样的？

```asm
<calculate_rs>:
  endbr64
  test   %edi,%edi
  jle    L79
  mov    %esi,%eax
  test   %esi,%esi
  jle    L79
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %edx,%r12d
  push   %rbp
  push   %rbx
  test   %edx,%edx
  jle    L101
  add    $0x1,%eax
  lea    0x8(%r8),%rbx
  lea    -0x1(%rdi),%edx
  mov    %rcx,-0x38(%rsp)
  movapd %xmm2,%xmm7
  shl    $0x3,%rax
  movapd %xmm3,%xmm6
  movapd %xmm0,%xmm5
  mov    %rax,-0x48(%rsp)
  mov    %r12d,%eax
  movapd %xmm1,%xmm8
  movapd %xmm0,%xmm4
  shr    %eax
  mov    %rbx,-0x30(%rsp)
  lea    0x8(%r9),%rbx
  unpcklpd %xmm8,%xmm8
  sub    $0x1,%eax
  mov    %rbx,-0x28(%rsp)
  unpcklpd %xmm7,%xmm7
  unpcklpd %xmm6,%xmm6
  shl    $0x4,%rax
  mov    0x38(%rsp),%rbx
  unpcklpd %xmm5,%xmm5
  lea    0x18(%rax),%rbp
  mov    %r12d,%eax
  and    $0xfffffffe,%eax
  add    $0x8,%rbx
  mov    %eax,-0x3c(%rsp)
  mov    %r12d,%eax
  or     $0x1,%eax
  mov    %rbx,-0x20(%rsp)
  lea    0x8(%rcx,%rdx,8),%rbx
  lea    0x0(,%rax,8),%r14
  lea    0x1(%r12),%eax
  mov    %rbx,-0x10(%rsp)
  mov    %rax,-0x18(%rsp)
  lea    -0x8(%r14),%r13
  nopl   (%rax)
L42:
  mov    -0x38(%rsp),%rax
  mov    $0x8,%r9d
  mov    0x8(%rax),%rbx
  mov    (%rax),%rax
  mov    %rax,-0x60(%rsp)
  mov    -0x30(%rsp),%rax
  mov    %rbx,-0x68(%rsp)
  mov    (%rax),%rbx
  mov    -0x28(%rsp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x58(%rsp)
  mov    -0x20(%rsp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x50(%rsp)
  cs nopw 0x0(%rax,%rax,1)
L108:
  mov    -0x68(%rsp),%rax
  mov    -0x50(%rsp),%rdx
  mov    (%rbx,%r9,1),%rdi
  mov    -0x8(%rbx,%r9,1),%r8
  mov    (%rax,%r9,1),%rcx
  mov    -0x60(%rsp),%rax
  mov    (%rdx,%r9,1),%rdx
  mov    (%rax,%r9,1),%rsi
  mov    -0x58(%rsp),%rax
  lea    0x8(%rdx),%r11
  lea    0x10(%rsi),%r10
  mov    (%rax,%r9,1),%rax
  cmp    %r10,%r11
  lea    0x10(%rcx),%r10
  setne  %r15b
  cmp    %r10,%r11
  setne  %r10b
  and    %r15d,%r10d
  cmp    $0x1,%r12d
  setne  %r15b
  and    %r15d,%r10d
  lea    0x10(%rdi),%r15
  cmp    %r15,%r11
  setne  %r15b
  and    %r15d,%r10d
  lea    0x10(%r8),%r15
  cmp    %r15,%r11
  setne  %r11b
  test   %r11b,%r10b
  je     L64
  mov    %rdx,%r11
  mov    $0x8,%r10d
  sub    %rax,%r11
  cmp    $0x8,%r11
  jbe    L64
  nopl   (%rax)
L100:
  movupd (%rcx,%r10,1),%xmm0
  movupd (%rsi,%r10,1),%xmm10
  movupd (%rdi,%r10,1),%xmm9
  movupd (%r8,%r10,1),%xmm11
  subpd  %xmm10,%xmm0
  movupd -0x8(%rax,%r10,1),%xmm12
  subpd  %xmm11,%xmm9
  divpd  %xmm8,%xmm0
  divpd  %xmm7,%xmm9
  addpd  %xmm9,%xmm0
  movupd (%rax,%r10,1),%xmm9
  subpd  %xmm12,%xmm9
  divpd  %xmm6,%xmm9
  addpd  %xmm9,%xmm0
  divpd  %xmm5,%xmm0
  movups %xmm0,(%rdx,%r10,1)
  add    $0x10,%r10
  cmp    %rbp,%r10
  jne    L100
  cmp    %r12d,-0x3c(%rsp)
  je     L25
  movsd  (%rdi,%r14,1),%xmm0
  movsd  (%rcx,%r14,1),%xmm9
  subsd  (%r8,%r14,1),%xmm0
  subsd  (%rsi,%r14,1),%xmm9
  divsd  %xmm2,%xmm0
  divsd  %xmm1,%xmm9
  addsd  %xmm9,%xmm0
  movsd  (%rax,%r14,1),%xmm9
  subsd  (%rax,%r13,1),%xmm9
  divsd  %xmm3,%xmm9
  addsd  %xmm9,%xmm0
  divsd  %xmm4,%xmm0
  movsd  %xmm0,(%rdx,%r14,1)
L25:
  add    $0x8,%r9
  cmp    -0x48(%rsp),%r9
  jne    L108
  addq   $0x8,-0x38(%rsp)
  mov    -0x38(%rsp),%rax
  addq   $0x8,-0x30(%rsp)
  addq   $0x8,-0x28(%rsp)
  addq   $0x8,-0x20(%rsp)
  cmp    -0x10(%rsp),%rax
  jne    L42
L101:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  xchg   %ax,%ax
L64:
  mov    -0x18(%rsp),%r11
  mov    $0x1,%r10d
  nopl   0x0(%rax,%rax,1)
L95:
  movsd  (%rdi,%r10,8),%xmm0
  movsd  (%rcx,%r10,8),%xmm9
  subsd  (%r8,%r10,8),%xmm0
  subsd  (%rsi,%r10,8),%xmm9
  divsd  %xmm2,%xmm0
  divsd  %xmm1,%xmm9
  addsd  %xmm9,%xmm0
  movsd  (%rax,%r10,8),%xmm9
  subsd  -0x8(%rax,%r10,8),%xmm9
  divsd  %xmm3,%xmm9
  addsd  %xmm9,%xmm0
  divsd  %xmm4,%xmm0
  movsd  %xmm0,(%rdx,%r10,8)
  add    $0x1,%r10
  cmp    %r10,%r11
  jne    L95
  jmp    L25
L79:
  ret
```

assistant: ```c
void calculate_rs(double dt, double dx, double dy, double dz, int imax, int jmax, int kmax, double ***F, double ***G, double ***H, double ***RS) {
  int i, j, k;
  for (i = 1; i < imax + 1; i++) {
    for (j = 1; j < jmax + 1; j++) {
      for (k = 1; k < kmax + 1; k++) {
        RS[i][j][k] = ((F[i][j][k] - F[i - 1][j][k]) / dx + (G[i][j][k] - G[i][j - 1][k]) / dy + (H[i][j][k] - H[i][j][k - 1]) / dz) / dt;
      }
    }
  }
}
```