user: Please show me the C implementation that matches the assembly code listed below:

```asm
<fflr_circuit>:
  endbr64
  push   %r13
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <float_as_uint@plt>
  mov    $0x17,%edx
  mov    $0x1e,%esi
  mov    %eax,%edi
  mov    %eax,%ebp
  call   <bits@plt>
  mov    $0x8,%edx
  mov    $0x8,%esi
  lea    -0x7f(%rax),%r13d
  mov    %r13d,%edi
  call   <bits@plt>
  cmp    $0x1,%eax
  jne    L107
L87:
  mov    $0x7fffff,%edi
  call   <UINT32_C@plt>
  mov    %r12d,%ecx
  xor    %edx,%edx
  mov    $0x1e,%esi
  shr    %cl,%eax
  mov    %ebp,%edi
  mov    %eax,%ebx
  call   <bits@plt>
  mov    %ebx,%r12d
  mov    $0x1f,%edx
  mov    %ebp,%edi
  not    %r12d
  mov    $0x1f,%esi
  and    %eax,%r12d
  call   <bits@plt>
  test   %eax,%eax
  jne    L91
L1:
  mov    $0x1f,%edx
  mov    $0x1f,%esi
  mov    %ebp,%edi
  call   <bits@plt>
  test   %eax,%eax
  je     L68
  mov    $0x17,%edx
  mov    $0x1e,%esi
  mov    %ebp,%edi
  call   <bits@plt>
  test   %eax,%eax
  je     L68
L77:
  mov    $0x1f,%edx
  mov    $0x1f,%esi
  mov    %ebp,%edi
  call   <bits@plt>
  cmp    $0x1,%eax
  je     L44
L31:
  mov    %ebp,%edi
  mov    $0x1f,%edx
  mov    $0x1f,%esi
  call   <bits@plt>
  shl    $0x1f,%eax
  mov    %eax,%edi
  or     %r12d,%edi
L92:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  jmp    1090 <uint_as_float@plt>
  nopl   (%rax)
L68:
  mov    $0x8,%edx
  mov    $0x8,%esi
  mov    %r13d,%edi
  call   <bits@plt>
  cmp    $0x1,%eax
  jne    L77
  mov    %ebp,%edi
  mov    $0x1f,%edx
  mov    $0x1f,%esi
  call   <bits@plt>
  mov    %r12d,%edi
  xor    %edx,%edx
  mov    $0x16,%esi
  mov    %eax,%ebp
  call   <bits@plt>
  mov    %ebp,%edi
  add    $0x8,%rsp
  shl    $0x1f,%edi
  pop    %rbx
  pop    %rbp
  or     %eax,%edi
  pop    %r12
  pop    %r13
  jmp    1090 <uint_as_float@plt>
  nopw   0x0(%rax,%rax,1)
L107:
  mov    $0x5,%edx
  mov    $0x7,%esi
  mov    %r13d,%edi
  mov    $0x1f,%r12d
  call   <bits@plt>
  test   %eax,%eax
  jne    L87
  xor    %edx,%edx
  mov    $0x4,%esi
  mov    %r13d,%edi
  call   <bits@plt>
  mov    %eax,%r12d
  jmp    L87
  nopw   0x0(%rax,%rax,1)
L91:
  xor    %edx,%edx
  mov    $0x1e,%esi
  mov    %ebp,%edi
  call   <bits@plt>
  cmp    %r12d,%eax
  je     L1
  lea    (%rbx,%rbx,1),%eax
  xor    %ebx,%eax
  xor    $0x1,%eax
  add    %eax,%r12d
  jmp    L1
  nopw   0x0(%rax,%rax,1)
L44:
  mov    $0x8,%edx
  mov    $0x8,%esi
  mov    %r13d,%edi
  call   <bits@plt>
  cmp    $0x1,%eax
  jne    L31
  mov    %ebp,%edi
  mov    $0x1f,%edx
  mov    $0x1f,%esi
  call   <bits@plt>
  mov    %r12d,%edi
  xor    %edx,%edx
  mov    $0x16,%esi
  mov    %eax,%ebp
  call   <bits@plt>
  shl    $0x1f,%ebp
  or     %eax,%ebp
  mov    %ebp,%edi
  or     $0x3f800000,%edi
  jmp    L92
```

assistant: ```c
float fflr_circuit(float f) {
  uint32_t fu = float_as_uint(f);
  unsigned int len, len_raw;
  uint32_t x_mask, incr;
  uint32_t f_masked, f_incr;
  uint32_t f_out;
  len_raw = bits(fu, 30, 23) - 0x7F;
  len = bits(len_raw, 8, 8) == 1 ? 0 : bits(len_raw, 7, 5) != 0 ? 31 : bits(len_raw, 4, 0);
  x_mask = UINT32_C(0x007FFFFF) >> len;
  incr = (x_mask << 1) ^ 1 ^ x_mask;
  f_masked = bits(fu, 30, 0) & ~x_mask;
  f_incr = f_masked + incr;
  f_out = (bits(fu, 31, 31) == 0 || bits(fu, 30, 0) == f_masked) ? f_masked : f_incr;
  uint32_t ret = (bits(fu, 31, 31) == 0 || bits(fu, 30, 23) == 0) && bits(len_raw, 8, 8) == 1 ? bits(fu, 31, 31) << 31 | 0x00 << 23 | bits(f_out, 22, 0) : bits(fu, 31, 31) == 1 && bits(len_raw, 8, 8) == 1 ? bits(fu, 31, 31) << 31 | 0x7F << 23 | bits(f_out, 22, 0) : bits(fu, 31, 31) << 31 | f_out;
  return uint_as_float(ret);
}
```