user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<feistelRound>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x70,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %rdx,-0x58(%rbp)
  mov    %rcx,-0x60(%rbp)
  mov    %r8,-0x68(%rbp)
  mov    %r9,-0x70(%rbp)
  movl   $0x0,-0x34(%rbp)
  movl   $0x0,-0x30(%rbp)
  mov    $0x80,%edi
  call   <malloc@plt>
  mov    %rax,-0x20(%rbp)
  mov    $0xc0,%edi
  call   <malloc@plt>
  mov    %rax,-0x18(%rbp)
  mov    $0x80,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    $0x80,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x18(%rbp),%rax
  mov    $0xc0,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    -0x10(%rbp),%rax
  mov    $0x80,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    -0x8(%rbp),%rax
  mov    $0x80,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    -0x20(%rbp),%rax
  mov    $0x80,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movl   $0x0,-0x34(%rbp)
  jmp    L14
L91:
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    -0x34(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x18(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rax),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x34(%rbp)
L14:
  cmpl   $0x2f,-0x34(%rbp)
  jle    L91
  movl   $0x0,-0x34(%rbp)
  jmp    L82
L77:
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%ecx
  mov    0x10(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x34(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rsi
  mov    -0x18(%rbp),%rax
  add    %rsi,%rax
  xor    %ecx,%edx
  mov    %edx,(%rax)
  addl   $0x1,-0x34(%rbp)
L82:
  cmpl   $0x2f,-0x34(%rbp)
  jle    L77
  movl   $0x0,-0x34(%rbp)
  jmp    L33
L7:
  mov    -0x34(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  lea    (%rax,%rax,1),%ecx
  mov    -0x34(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  add    $0x5,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  add    %ecx,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x34(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  lea    (%rax,%rax,1),%ecx
  mov    -0x34(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  add    %ecx,%eax
  lea    (%rax,%rax,1),%ecx
  mov    -0x34(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  add    $0x3,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  add    %ecx,%eax
  lea    (%rax,%rax,1),%ecx
  mov    -0x34(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  add    $0x4,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  add    %ecx,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x70(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x2c(%rbp),%eax
  shl    $0x4,%eax
  movslq %eax,%rcx
  mov    -0x28(%rbp),%eax
  cltq
  add    %rcx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  sar    $0x3,%eax
  mov    %eax,%ecx
  mov    -0x30(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x30(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  and    $0x1,%ecx
  mov    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x24(%rbp),%eax
  sar    $0x2,%eax
  mov    %eax,%ecx
  mov    -0x30(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x30(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  and    $0x1,%ecx
  mov    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x24(%rbp),%eax
  sar    %eax
  mov    %eax,%ecx
  mov    -0x30(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x30(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  and    $0x1,%ecx
  mov    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x30(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x30(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    -0x24(%rbp),%edx
  and    $0x1,%edx
  mov    %edx,(%rax)
  addl   $0x1,-0x34(%rbp)
L33:
  cmpl   $0x7,-0x34(%rbp)
  jle    L7
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  movl   $0x0,-0x34(%rbp)
  jmp    L34
L83:
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x60(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    -0x34(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x8(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rax),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x34(%rbp)
L34:
  cmpl   $0x1f,-0x34(%rbp)
  jle    L83
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x50(%rbp),%rcx
  mov    -0x20(%rbp),%rax
  mov    $0x80,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  movl   $0x0,-0x34(%rbp)
  jmp    L72
L62:
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%ecx
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rsi
  mov    -0x50(%rbp),%rax
  add    %rsi,%rax
  xor    %ecx,%edx
  mov    %edx,(%rax)
  addl   $0x1,-0x34(%rbp)
L72:
  cmpl   $0x1f,-0x34(%rbp)
  jle    L62
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x20(%rbp),%rcx
  mov    -0x48(%rbp),%rax
  mov    $0x80,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  leave
  ret
```

assistant: ```c
void feistelRound(int *L_pre, int *R_pre, int *E, int *P, int **subkeys, int **S_box, int round) {
  int i = 0;
  int j = 0;
  int *temp = malloc(sizeof(int) * 32);
  int *expandR = malloc(sizeof(int) * 48);
  int *substitute = malloc(sizeof(int) * 32);
  int *permute = malloc(sizeof(int) * 32);
  memset(expandR, 0, sizeof(int) * 48);
  memset(substitute, 0, sizeof(int) * 32);
  memset(permute, 0, sizeof(int) * 32);
  memset(temp, 0, sizeof(int) * 32);
  for (i = 0; i < 48; i++) {
    (expandR + i)[0] = (R_pre + ((E + i)[0] - 1))[0];
  }
  for (i = 0; i < 48; i++) {
    (expandR + i)[0] = (expandR + i)[0] ^ (subkeys[round] + i)[0];
  }
  for (i = 0; i < 8; i++) {
    int row = (expandR + i * 6)[0] * 2 + (expandR + i * 6 + 5)[0] * 1;
    int col = (expandR + i * 6 + 1)[0] * 2 * 2 * 2 + (expandR + i * 6 + 2)[0] * 2 * 2 + (expandR + i * 6 + 3)[0] * 2 + (expandR + i * 6 + 4)[0] * 1;
    int fourbits = (S_box[i] + row * 16 + col)[0];
    (substitute + j++)[0] = (fourbits >> 3) & 0x1;
    (substitute + j++)[0] = (fourbits >> 2) & 0x1;
    (substitute + j++)[0] = (fourbits >> 1) & 0x1;
    (substitute + j++)[0] = (fourbits)&0x1;
  }
  free(expandR);
  for (i = 0; i < 32; i++) {
    (permute + i)[0] = (substitute + ((P + i)[0] - 1))[0];
  }
  free(substitute);
  memcpy(temp, R_pre, sizeof(int) * 32);
  for (i = 0; i < 32; i++) {
    (R_pre + i)[0] = (L_pre + i)[0] ^ (permute + i)[0];
  }
  free(permute);
  memcpy(L_pre, temp, sizeof(int) * 32);
  free(temp);
}
```