user: Converte this assembly snippet into its equivalent C code:

```asm
<od_renorm_add1>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0xe0,%rsp
  movsd  %xmm0,-0x68(%rbp)
  movsd  %xmm1,-0x70(%rbp)
  movsd  %xmm2,-0x78(%rbp)
  movsd  %xmm3,-0x80(%rbp)
  movsd  %xmm4,-0x88(%rbp)
  movsd  %xmm5,-0x90(%rbp)
  movsd  %xmm6,-0x98(%rbp)
  movsd  %xmm7,-0xa0(%rbp)
  mov    %rdi,-0xa8(%rbp)
  mov    %rsi,-0xb0(%rbp)
  mov    %rdx,-0xb8(%rbp)
  mov    %rcx,-0xc0(%rbp)
  mov    %r8,-0xc8(%rbp)
  mov    %r9,-0xd0(%rbp)
  mov    0x18(%rbp),%rax
  mov    %rax,-0xd8(%rbp)
  mov    0x20(%rbp),%rax
  mov    %rax,-0xe0(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    -0x20(%rbp),%rdx
  mov    -0xa0(%rbp),%rax
  mov    %rdx,%rdi
  movsd  0x10(%rbp),%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  lea    -0x28(%rbp),%rdx
  mov    -0x98(%rbp),%rax
  mov    %rdx,%rdi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  lea    -0x30(%rbp),%rdx
  mov    -0x90(%rbp),%rax
  mov    %rdx,%rdi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  lea    -0x38(%rbp),%rdx
  mov    -0x88(%rbp),%rax
  mov    %rdx,%rdi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  lea    -0x40(%rbp),%rdx
  mov    -0x80(%rbp),%rax
  mov    %rdx,%rdi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  lea    -0x48(%rbp),%rdx
  mov    -0x78(%rbp),%rax
  mov    %rdx,%rdi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  lea    -0x50(%rbp),%rdx
  mov    -0x70(%rbp),%rax
  mov    %rdx,%rdi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  lea    -0x58(%rbp),%rdx
  mov    -0x68(%rbp),%rax
  mov    %rdx,%rdi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <dd_two_sum@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x10(%rbp)
  movsd  -0x20(%rbp),%xmm0
  movsd  -0x28(%rbp),%xmm7
  movsd  -0x30(%rbp),%xmm6
  movsd  -0x38(%rbp),%xmm5
  movsd  -0x40(%rbp),%xmm4
  movsd  -0x48(%rbp),%xmm3
  movsd  -0x50(%rbp),%xmm2
  movsd  -0x58(%rbp),%xmm1
  mov    -0xc8(%rbp),%r9
  mov    -0xc0(%rbp),%r8
  mov    -0xb8(%rbp),%rcx
  mov    -0xb0(%rbp),%rdx
  mov    -0xa8(%rbp),%rsi
  lea    -0x18(%rbp),%rdi
  mov    -0x10(%rbp),%rax
  push   -0xe0(%rbp)
  push   -0xd8(%rbp)
  push   -0xd0(%rbp)
  lea    -0x8(%rsp),%rsp
  movsd  %xmm0,(%rsp)
  movq   %rax,%xmm0
  call   <od_renorm8@plt>
  add    $0x20,%rsp
  nop
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L2
  call   <__stack_chk_fail@plt>
L2:
  leave
  ret
```

assistant: ```c
void od_renorm_add1(double x0, double x1, double x2, double x3, double x4, double x5, double x6, double x7, double y, double *r0, double *r1, double *r2, double *r3, double *r4, double *r5, double *r6, double *r7) {
  double f0, f1, f2, f3, f4, f5, f6, f7, f8, pr;
  pr = dd_two_sum(x7, y, &f8);
  pr = dd_two_sum(x6, pr, &f7);
  pr = dd_two_sum(x5, pr, &f6);
  pr = dd_two_sum(x4, pr, &f5);
  pr = dd_two_sum(x3, pr, &f4);
  pr = dd_two_sum(x2, pr, &f3);
  pr = dd_two_sum(x1, pr, &f2);
  f0 = dd_two_sum(x0, pr, &f1);
  od_renorm8(f0, f1, f2, f3, f4, f5, f6, f7, f8, &pr, r0, r1, r2, r3, r4, r5, r6, r7);
}
```