user: 请从给定的汇编指令推导出C源代码：

```asm
<xlog>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  movsd  %xmm0,-0x38(%rbp)
  movsd  -0x38(%rbp),%xmm1
  movsd  D73(%rip),%xmm0
  mulsd  %xmm0,%xmm1
  movq   %xmm1,%rax
  movq   %rax,%xmm0
  call   <ilogbp1@plt>
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x38(%rbp),%rax
  mov    %edx,%edi
  movq   %rax,%xmm0
  call   <ldexpk@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  movsd  D72(%rip),%xmm1
  subsd  %xmm1,%xmm0
  movsd  -0x18(%rbp),%xmm2
  movsd  D72(%rip),%xmm1
  addsd  %xmm2,%xmm1
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x20(%rbp)
  movsd  -0x20(%rbp),%xmm0
  mulsd  %xmm0,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movsd  D47(%rip),%xmm0
  movsd  %xmm0,-0x8(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <mla@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <mla@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <mla@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <mla@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <mla@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <mla@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x10(%rbp),%xmm0
  mov    -0x8(%rbp),%rax
  mov    $0x2,%edi
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  call   <mla@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x20(%rbp),%xmm0
  movapd %xmm0,%xmm1
  mulsd  -0x8(%rbp),%xmm1
  pxor   %xmm2,%xmm2
  cvtsi2sdl -0x24(%rbp),%xmm2
  movsd  D25(%rip),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x20(%rbp)
  mov    -0x38(%rbp),%rax
  movq   %rax,%xmm0
  call   <xisinf@plt>
  test   %rax,%rax
  je     L31
  movsd  D15(%rip),%xmm0
  movsd  %xmm0,-0x20(%rbp)
L31:
  pxor   %xmm0,%xmm0
  comisd -0x38(%rbp),%xmm0
  jbe    L16
  movsd  D51(%rip),%xmm0
  movsd  %xmm0,-0x20(%rbp)
L16:
  pxor   %xmm0,%xmm0
  ucomisd -0x38(%rbp),%xmm0
  jp     L10
  pxor   %xmm0,%xmm0
  ucomisd -0x38(%rbp),%xmm0
  jne    L10
  movsd  D4(%rip),%xmm0
  movsd  %xmm0,-0x20(%rbp)
L10:
  movsd  -0x20(%rbp),%xmm0
  movq   %xmm0,%rax
  movq   %rax,%xmm0
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_tag: D73
type_guessed: f64
name: unpack_data
arguments: data_tag: D72
type_guessed: byte[8]
name: unpack_data
arguments: data_tag: D47
type_guessed: f64
name: unpack_data
arguments: data_tag: D25
type_guessed: f64
name: unpack_data
arguments: data_tag: D15
type_guessed: byte[8]
name: unpack_data
arguments: data_tag: D51
type_guessed: byte[8]
name: unpack_data
arguments: data_tag: D4
type_guessed: byte[8]

tool: D73: 0.7071

tool: {"D72": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0x3f]}

tool: D47: 0.1481970551779351

tool: D25: 0.6931471805599453

tool: {"D15": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0x7f]}

tool: {"D51": [0x00,0x00,0x00,0x00,0x00,0x00,0xf8,0x7f]}

tool: {"D4": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0xff]}

assistant: ```c
double xlog(double d) {
  double x, x2, t, m;
  int e;
  e = ilogbp1(d * 0.7071);
  m = ldexpk(d, -e);
  x = (m - 1) / (m + 1);
  x2 = x * x;
  t = 0.148197055177935105296783;
  t = mla(t, x2, 0.153108178020442575739679);
  t = mla(t, x2, 0.181837339521549679055568);
  t = mla(t, x2, 0.22222194152736701733275);
  t = mla(t, x2, 0.285714288030134544449368);
  t = mla(t, x2, 0.399999999989941956712869);
  t = mla(t, x2, 0.666666666666685503450651);
  t = mla(t, x2, 2);
  x = x * t + 0.693147180559945286226764 * e;
  if (xisinf(d))
    x = __builtin_inf();
  if (d < 0)
    x = __builtin_nan("");
  if (d == 0)
    x = -__builtin_inf();
  return x;
}
```