user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<round>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  movss  %xmm0,-0x14(%rbp)
  movss  %xmm1,-0x18(%rbp)
  mov    -0x18(%rbp),%eax
  movd   %eax,%xmm0
  call   <fabs@plt>
  mov    %eax,%edi
  call   <log10@plt>
  mov    %ax,-0x2(%rbp)
  jmp    L53
L44:
  pxor   %xmm2,%xmm2
  cvtss2sd -0x18(%rbp),%xmm2
  movsd  %xmm2,-0x20(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movsd  -0x20(%rbp),%xmm1
  divsd  %xmm0,%xmm1
  movsd  D28(%rip),%xmm0
  comisd %xmm1,%xmm0
  jb     L48
  movzwl -0x2(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x2(%rbp)
  jmp    L53
L48:
  movzwl -0x2(%rbp),%eax
  add    $0x1,%eax
  mov    %ax,-0x2(%rbp)
L53:
  pxor   %xmm3,%xmm3
  cvtss2sd -0x18(%rbp),%xmm3
  movsd  %xmm3,-0x20(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movapd %xmm0,%xmm1
  movsd  -0x20(%rbp),%xmm0
  divsd  %xmm1,%xmm0
  movsd  D28(%rip),%xmm1
  comisd %xmm1,%xmm0
  setae  %al
  xor    $0x1,%eax
  test   %al,%al
  jne    L44
  pxor   %xmm4,%xmm4
  cvtss2sd -0x18(%rbp),%xmm4
  movsd  %xmm4,-0x20(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movsd  -0x20(%rbp),%xmm1
  divsd  %xmm0,%xmm1
  movsd  D17(%rip),%xmm0
  comisd %xmm1,%xmm0
  seta   %al
  xor    $0x1,%eax
  test   %al,%al
  jne    L44
  pxor   %xmm5,%xmm5
  cvtss2sd -0x18(%rbp),%xmm5
  movsd  %xmm5,-0x20(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movsd  -0x20(%rbp),%xmm1
  divsd  %xmm0,%xmm1
  movsd  D26(%rip),%xmm0
  comisd %xmm1,%xmm0
  jbe    L31
  movzwl -0x2(%rbp),%eax
  sub    $0x1,%eax
  mov    %ax,-0x2(%rbp)
L31:
  pxor   %xmm6,%xmm6
  cvtss2sd -0x18(%rbp),%xmm6
  movsd  %xmm6,-0x20(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movsd  -0x20(%rbp),%xmm1
  divsd  %xmm0,%xmm1
  movsd  D2(%rip),%xmm0
  addsd  %xmm1,%xmm0
  pxor   %xmm4,%xmm4
  cvtsd2ss %xmm0,%xmm4
  movd   %xmm4,%eax
  movd   %eax,%xmm0
  call   <floorf@plt>
  movsd  %xmm0,-0x20(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movapd %xmm0,%xmm7
  mulsd  -0x20(%rbp),%xmm7
  movsd  %xmm7,-0x20(%rbp)
  pxor   %xmm2,%xmm2
  cvtss2sd -0x14(%rbp),%xmm2
  movsd  %xmm2,-0x28(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movsd  -0x28(%rbp),%xmm2
  divsd  %xmm0,%xmm2
  movapd %xmm2,%xmm1
  movsd  D2(%rip),%xmm0
  addsd  %xmm1,%xmm0
  pxor   %xmm6,%xmm6
  cvtsd2ss %xmm0,%xmm6
  movd   %xmm6,%eax
  movd   %eax,%xmm0
  call   <floorf@plt>
  movsd  %xmm0,-0x28(%rbp)
  movswl -0x2(%rbp),%eax
  mov    %eax,%esi
  mov    $0xa,%edi
  call   <pow@plt>
  movapd %xmm0,%xmm3
  mulsd  -0x28(%rbp),%xmm3
  movq   %xmm3,%rax
  movsd  -0x20(%rbp),%xmm1
  movq   %rax,%xmm0
  lea    D8(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  nop
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: data_label: D28
type_guessed: byte[8]
name: retrieve_data
arguments: data_label: D17
type_guessed: f64
name: retrieve_data
arguments: data_label: D26
type_guessed: byte[8]
name: retrieve_data
arguments: data_label: D2
type_guessed: f64
name: retrieve_data
arguments: data_label: D8
type_guessed: string

tool: {"D28": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0x3f]}

tool: D17: 10

tool: {"D26": [0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x40]}

tool: D2: 0.5

tool: D8: %f	%f	

assistant: ```c
void round(float v, float err) {
  short int exp = (short)log10(fabs(err));
  while (!(err / pow(10, exp) >= 1 && err / pow(10, exp) < 10)) {
    if (err / pow(10, exp) <= 1)
      exp--;
    else
      exp++;
  }
  if (err / pow(10, exp) < 3)
    exp--;
  printf("%f\t%f\t", floorf(v / pow(10., exp) + 0.5) * pow(10., exp), floorf(err / pow(10., exp) + 0.5) * pow(10., exp));
}
```