user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x1c8,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,-0x1e8(%rbp)
  movl   $0x1e,-0x140(%rbp)
  movl   $0x14,-0x13c(%rbp)
  mov    -0x140(%rbp),%edx
  movslq %edx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x138(%rbp)
  movslq %edx,%rax
  mov    %rax,%rcx
  mov    $0x0,%ebx
  movslq %edx,%rax
  mov    %rax,%rsi
  mov    $0x0,%edi
  movslq %edx,%rax
  lea    0x0(,%rax,4),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%ebx
  mov    $0x0,%edx
  div    %rbx
  imul   $0x10,%rax,%rdx
  mov    %rdx,%rax
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rcx
  sub    %rax,%rcx
L9:
  cmp    %rcx,%rsp
  je     L104
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L9
L104:
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  mov    %rdx,%rax
  and    $0xfff,%eax
  test   %rax,%rax
  je     L39
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L39:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x130(%rbp)
  mov    -0x130(%rbp),%rax
  movl   $0x5,0x74(%rax)
  mov    -0x130(%rbp),%rax
  movl   $0x5,0x74(%rax)
  mov    -0x130(%rbp),%rax
  mov    0x74(%rax),%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    -0x140(%rbp),%eax
  lea    0x4(%rax),%edx
  movslq %edx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x128(%rbp)
  movslq %edx,%rax
  mov    %rax,-0x1b0(%rbp)
  movq   $0x0,-0x1a8(%rbp)
  movslq %edx,%rax
  mov    %rax,-0x1c0(%rbp)
  movq   $0x0,-0x1b8(%rbp)
  movslq %edx,%rax
  lea    0x0(,%rax,4),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%ebx
  mov    $0x0,%edx
  div    %rbx
  imul   $0x10,%rax,%rdx
  mov    %rdx,%rax
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rcx
  sub    %rax,%rcx
L13:
  cmp    %rcx,%rsp
  je     L105
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L13
L105:
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  mov    %rdx,%rax
  and    $0xfff,%eax
  test   %rax,%rax
  je     L87
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L87:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x120(%rbp)
  mov    -0x120(%rbp),%rax
  movl   $0x2,0x7c(%rax)
  mov    -0x120(%rbp),%rax
  movl   $0x2,0x7c(%rax)
  mov    -0x120(%rbp),%rax
  mov    0x7c(%rax),%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    -0x140(%rbp),%esi
  movslq %esi,%rax
  sub    $0x1,%rax
  mov    %rax,-0x118(%rbp)
  movslq %esi,%rax
  mov    %rax,%r12
  mov    $0x0,%r13d
  imul   $0x3c0,%r13,%rdx
  imul   $0x0,%r12,%rax
  lea    (%rdx,%rax,1),%rcx
  mov    $0x3c0,%eax
  mul    %r12
  add    %rdx,%rcx
  mov    %rcx,%rdx
  movslq %esi,%rdx
  mov    %rdx,%rax
  shl    $0x4,%rax
  sub    %rdx,%rax
  shl    $0x3,%rax
  movslq %esi,%rax
  mov    %rax,%r14
  mov    $0x0,%r15d
  imul   $0x3c0,%r15,%rdx
  imul   $0x0,%r14,%rax
  lea    (%rdx,%rax,1),%rcx
  mov    $0x3c0,%eax
  mul    %r14
  add    %rdx,%rcx
  mov    %rcx,%rdx
  movslq %esi,%rdx
  mov    %rdx,%rax
  shl    $0x4,%rax
  sub    %rdx,%rax
  shl    $0x3,%rax
  mov    %rax,%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%ebx
  mov    $0x0,%edx
  div    %rbx
  imul   $0x10,%rax,%rdx
  mov    %rdx,%rax
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rcx
  sub    %rax,%rcx
L155:
  cmp    %rcx,%rsp
  je     L36
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L155
L36:
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  mov    %rdx,%rax
  and    $0xfff,%eax
  test   %rax,%rax
  je     L103
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L103:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x110(%rbp)
  mov    -0x110(%rbp),%rax
  movl   $0x2a,0xf8(%rax)
  mov    -0x110(%rbp),%rax
  mov    0xf8(%rax),%eax
  cmp    $0x2a,%eax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    -0x140(%rbp),%esi
  movslq %esi,%rax
  sub    $0x1,%rax
  mov    %rax,-0x108(%rbp)
  movslq %esi,%rax
  mov    %rax,-0x1d0(%rbp)
  movq   $0x0,-0x1c8(%rbp)
  movslq %esi,%rax
  lea    0x0(,%rax,4),%rdi
  movslq %esi,%rax
  mov    %rax,-0x150(%rbp)
  movq   $0x0,-0x148(%rbp)
  mov    -0x150(%rbp),%r11
  mov    -0x148(%rbp),%r12
  imul   $0x280,%r12,%rdx
  imul   $0x0,%r11,%rax
  lea    (%rdx,%rax,1),%rcx
  mov    $0x280,%eax
  mul    %r11
  add    %rdx,%rcx
  mov    %rcx,%rdx
  movslq %esi,%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  shl    $0x4,%rax
  movslq %esi,%rax
  mov    %rax,-0x160(%rbp)
  movq   $0x0,-0x158(%rbp)
  mov    -0x160(%rbp),%r9
  mov    -0x158(%rbp),%r10
  imul   $0x280,%r10,%rdx
  imul   $0x0,%r9,%rax
  lea    (%rdx,%rax,1),%rcx
  mov    $0x280,%eax
  mul    %r9
  add    %rdx,%rcx
  mov    %rcx,%rdx
  movslq %esi,%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  shl    $0x4,%rax
  mov    %rax,%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%ebx
  mov    $0x0,%edx
  div    %rbx
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L7:
  cmp    %rdx,%rsp
  je     L85
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L7
L85:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L123
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L123:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x100(%rbp)
  mov    %rdi,%rdx
  shr    $0x2,%rdx
  mov    -0x100(%rbp),%rax
  add    $0x1,%rdx
  movl   $0x2a,(%rax,%rdx,8)
  shr    $0x2,%rdi
  mov    %rdi,%rdx
  mov    -0x100(%rbp),%rax
  add    $0x1,%rdx
  mov    (%rax,%rdx,8),%eax
  cmp    $0x2a,%eax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    -0x140(%rbp),%ecx
  mov    -0x13c(%rbp),%esi
  movslq %ecx,%rax
  sub    $0x1,%rax
  mov    %rax,-0xf8(%rbp)
  movslq %ecx,%rax
  mov    %rax,-0x1e0(%rbp)
  movq   $0x0,-0x1d8(%rbp)
  movslq %ecx,%rax
  lea    0x0(,%rax,4),%rdi
  movslq %esi,%rax
  sub    $0x1,%rax
  mov    %rax,-0xf0(%rbp)
  movslq %ecx,%rax
  mov    %rax,-0x170(%rbp)
  movq   $0x0,-0x168(%rbp)
  movslq %esi,%rax
  mov    %rax,-0x180(%rbp)
  movq   $0x0,-0x178(%rbp)
  mov    -0x170(%rbp),%r11
  mov    -0x168(%rbp),%r12
  mov    %r12,%rdx
  mov    -0x180(%rbp),%r14
  mov    -0x178(%rbp),%r15
  imul   %r14,%rdx
  mov    %r15,%rax
  imul   %r11,%rax
  lea    (%rdx,%rax,1),%r8
  mov    %r11,%rax
  mul    %r14
  add    %rdx,%r8
  mov    %r8,%rdx
  movslq %ecx,%rax
  mov    %rax,-0x190(%rbp)
  movq   $0x0,-0x188(%rbp)
  movslq %esi,%rax
  mov    %rax,-0x1a0(%rbp)
  movq   $0x0,-0x198(%rbp)
  mov    -0x190(%rbp),%r14
  mov    -0x188(%rbp),%r15
  mov    %r15,%rdx
  mov    -0x1a0(%rbp),%r9
  mov    -0x198(%rbp),%r10
  imul   %r9,%rdx
  mov    %r10,%rax
  imul   %r14,%rax
  lea    (%rdx,%rax,1),%r8
  mov    %r14,%rax
  mul    %r9
  add    %rdx,%r8
  mov    %r8,%rdx
  movslq %ecx,%rdx
  movslq %esi,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,4),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%ebx
  mov    $0x0,%edx
  div    %rbx
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L55:
  cmp    %rdx,%rsp
  je     L144
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L55
L144:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L139
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L139:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0xe8(%rbp)
  mov    %rdi,%rdx
  shr    $0x2,%rdx
  mov    -0xe8(%rbp),%rax
  add    $0x1,%rdx
  movl   $0x2a,(%rax,%rdx,8)
  shr    $0x2,%rdi
  mov    %rdi,%rdx
  mov    -0xe8(%rbp),%rax
  add    $0x1,%rdx
  mov    (%rax,%rdx,8),%eax
  cmp    $0x2a,%eax
  sete   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    -0x1e8(%rbp),%rsp
  mov    $0x0,%eax
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L53
  call   <__stack_chk_fail@plt>
L53:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
int main(void) {
  int a[40];
  int n = 30;
  int m = 20;
  int b[n];
  b[29] = 5;
  assert(b[29] = 5);
  int c[n + 4];
  c[31] = 2;
  assert(c[31] = 2);
  int d[n][30];
  d[2][2] = 42;
  assert(d[2][2] == 42);
  int e[20][n];
  e[2][2] = 42;
  assert(e[2][2] == 42);
  int f[m][n];
  f[2][2] = 42;
  assert(f[2][2] == 42);
}
```