user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<fn3>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r12
  push   %rbx
  sub    $0xb0,%rsp
  mov    %edi,-0x84(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x28(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%r12
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x70(%rbp)
  mov    -0x84(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %eax,%edx
  movslq %edx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x68(%rbp)
  movslq %edx,%rax
  mov    %rax,%rcx
  mov    $0x0,%ebx
  movslq %edx,%rax
  mov    %rax,%r8
  mov    $0x0,%r9d
  movslq %edx,%rax
  lea    0x0(,%rax,8),%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
L81:
  cmp    %rcx,%rsp
  je     L109
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L81
L109:
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  mov    %rdx,%rax
  and    $0xfff,%eax
  test   %rax,%rax
  je     L130
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L130:
  mov    %rsp,%rax
  add    $0x7,%rax
  shr    $0x3,%rax
  shl    $0x3,%rax
  mov    %rax,-0x60(%rbp)
  mov    -0x84(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %eax,%edx
  movslq %edx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x58(%rbp)
  movslq %edx,%rax
  mov    %rax,-0xa0(%rbp)
  movq   $0x0,-0x98(%rbp)
  movslq %edx,%rax
  mov    %rax,-0xb0(%rbp)
  movq   $0x0,-0xa8(%rbp)
  movslq %edx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L0:
  cmp    %rdx,%rsp
  je     L27
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L0
L27:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L51
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L51:
  mov    %rsp,%rax
  add    $0x7,%rax
  shr    $0x3,%rax
  shl    $0x3,%rax
  mov    %rax,-0x50(%rbp)
  mov    -0x84(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x48(%rbp)
  movslq %eax,%rdx
  mov    %rdx,-0xc0(%rbp)
  movq   $0x0,-0xb8(%rbp)
  movslq %eax,%rdx
  mov    %rdx,-0xd0(%rbp)
  movq   $0x0,-0xc8(%rbp)
  cltq
  lea    0x0(,%rax,8),%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
L112:
  cmp    %rdx,%rsp
  je     L133
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L112
L133:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L41
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L41:
  mov    %rsp,%rax
  add    $0x7,%rax
  shr    $0x3,%rax
  shl    $0x3,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x84(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x38(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r14
  mov    $0x0,%r15d
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%edi
  mov    $0x0,%edx
  div    %rdi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L67:
  cmp    %rdx,%rsp
  je     L5
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L67
L5:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L83
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L83:
  mov    %rsp,%rax
  add    $0x7,%rax
  shr    $0x3,%rax
  shl    $0x3,%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x84(%rbp),%edx
  mov    -0x50(%rbp),%rcx
  mov    -0x60(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <fn1@plt>
  mov    -0x84(%rbp),%edx
  mov    -0x40(%rbp),%rcx
  mov    -0x30(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <fn1@plt>
  movl   $0x0,-0x74(%rbp)
  jmp    L114
L25:
  mov    -0x60(%rbp),%rax
  mov    -0x74(%rbp),%edx
  movslq %edx,%rdx
  movsd  (%rax,%rdx,8),%xmm1
  mov    -0x50(%rbp),%rax
  mov    -0x74(%rbp),%edx
  movslq %edx,%rdx
  movsd  (%rax,%rdx,8),%xmm0
  mulsd  %xmm0,%xmm1
  mov    -0x40(%rbp),%rax
  mov    -0x74(%rbp),%edx
  movslq %edx,%rdx
  movsd  (%rax,%rdx,8),%xmm0
  addsd  %xmm1,%xmm0
  movsd  -0x70(%rbp),%xmm1
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x70(%rbp)
  addl   $0x1,-0x74(%rbp)
L114:
  mov    -0x74(%rbp),%eax
  cmp    -0x84(%rbp),%eax
  jl     L25
  movsd  -0x70(%rbp),%xmm0
  mov    %r12,%rsp
  movq   %xmm0,%rax
  mov    -0x28(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L47
  call   <__stack_chk_fail@plt>
L47:
  movq   %rax,%xmm0
  lea    -0x20(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
double fn3(int x) {
  double s = 0;
  double b[3 * x], c[3 * x], d[3 * x], e[3 * x];
  int i;
  fn1(b, c, x);
  fn1(e, d, x);
#pragma omp target map(tofrom : s)
#pragma omp parallel for reduction(+ : s)
  for (i = 0; i < x; i++)
    s += b[i] * c[i] + d[i];
  return s;
}
```