user: What would the C source look like for the assembly code provided here?

```asm
<question_mark>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %edi,%r15d
  mov    %esi,%r13d
  mov    %edx,%r14d
  mov    $0x0,%esi
  call   <mpf_set_ui@plt>
  mov    %r13d,%edi
  call   <mpf_sgn@plt>
  test   %rax,%rax
  jne    L49
L53:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L49:
  mov    $0x0,%ebx
  mov    %ebx,%edi
  call   <mpf_init@plt>
  mov    $0x0,%ebp
  mov    %ebp,%edi
  call   <mpf_init@plt>
  mov    $0x0,%r12d
  mov    %r12d,%edi
  call   <mpf_init@plt>
  mov    %r12d,%edi
  call   <mpf_init@plt>
  mov    %ebx,%edi
  call   <mpf_init@plt>
  mov    %r13d,%esi
  mov    %ebp,%edi
  call   <mpf_set@plt>
  mov    $0x1,%esi
  mov    %r12d,%edi
  call   <mpf_set_ui@plt>
  mov    %r14d,%r14d
  pxor   %xmm0,%xmm0
  cvtsi2sd %r14,%xmm0
  mulsd  D0(%rip),%xmm0
  call   <floor@plt>
  mov    %rax,%r14
  mov    %rax,0x8(%rsp)
  lea    -0x2(%rax),%rdx
  mov    %r12d,%esi
  mov    %ebx,%edi
  call   <mpf_div_2exp@plt>
  test   %r14,%r14
  js     L45
  mov    $0x1,%r14d
  mov    $0xffffffffffffffff,%r13
  jmp    L32
L22:
  mov    $0x0,%ebx
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r15d,%edi
  call   <mpf_sub@plt>
L48:
  mov    $0x0,%ebx
  mov    %ebx,%esi
  mov    $0x0,%ebp
  mov    %ebp,%edi
  call   <mpf_cmp@plt>
  test   %rax,%rax
  js     L45
  add    $0x1,%r14d
  cmp    %r13,0x8(%rsp)
  jle    L45
L32:
  mov    $0x0,%ebp
  mov    %ebp,%edx
  mov    $0x1,%esi
  mov    $0x0,%ebx
  mov    %ebx,%edi
  call   <mpf_ui_div@plt>
  mov    %ebx,%esi
  mov    $0x0,%r12d
  mov    %r12d,%edi
  call   <mpf_floor@plt>
  mov    %r12d,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <mpf_sub@plt>
  mov    %r12d,%edi
  call   <mpf_get_si@plt>
  add    %rax,%r13
  mov    %r13,%rdx
  mov    %r12d,%esi
  mov    %ebx,%edi
  call   <mpf_div_2exp@plt>
  mov    %r14d,%edx
  shr    $0x1f,%edx
  lea    (%r14,%rdx,1),%eax
  and    $0x1,%eax
  sub    %edx,%eax
  cmp    $0x1,%eax
  jne    L22
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r15d,%edi
  call   <mpf_add@plt>
  jmp    L48
L45:
  mov    $0x0,%ebx
  mov    %ebx,%edi
  call   <mpf_clear@plt>
  mov    $0x0,%ebp
  mov    %ebp,%edi
  call   <mpf_clear@plt>
  mov    $0x0,%r12d
  mov    %r12d,%edi
  call   <mpf_clear@plt>
  mov    %r12d,%edi
  call   <mpf_clear@plt>
  mov    %ebx,%edi
  call   <mpf_clear@plt>
  jmp    L53
```

tool_calls: name: parse_data
arguments: tag: D0
type: f64

tool: D0: 3.321

assistant: ```c
void question_mark(mpf_t qmark, const mpf_t x, unsigned int prec) {
  mpf_t ox, h, bits, one, low_bound;
  long bitsdone, ibits;
  int place;
  mpf_set_ui(qmark, 0);
  if (0 == mpf_sgn(x))
    return;
  mpf_init(ox);
  mpf_init(h);
  mpf_init(bits);
  mpf_init(one);
  mpf_init(low_bound);
  mpf_set(h, x);
  mpf_set_ui(one, 1);
  long nbits = (long)floor(3.321 * prec);
  mpf_div_2exp(low_bound, one, nbits - 2);
  bitsdone = -1;
  place = 1;
  while (bitsdone < nbits) {
    mpf_ui_div(ox, 1, h);
    mpf_floor(bits, ox);
    mpf_sub(h, ox, bits);
    ibits = mpf_get_si(bits);
    bitsdone += ibits;
    mpf_div_2exp(ox, one, bitsdone);
    if (place % 2 == 1) {
      mpf_add(qmark, qmark, ox);
    } else {
      mpf_sub(qmark, qmark, ox);
    }
    if (mpf_cmp(h, low_bound) < 0)
      break;
    place++;
  }
  mpf_clear(ox);
  mpf_clear(h);
  mpf_clear(bits);
  mpf_clear(one);
  mpf_clear(low_bound);
}
```