user: 请将以下的汇编代码转换成C语言代码:

```asm
<math_log>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  movsd  %xmm0,-0x48(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    -0x48(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  movsd  (%rax),%xmm1
  pxor   %xmm0,%xmm0
  comisd %xmm1,%xmm0
  jb     L32
  movsd  -0x30(%rbp),%xmm0
  jmp    L21
L32:
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x30(%rbp)
  lea    -0x30(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x28(%rbp),%rax
  mov    0xc(%rax),%eax
  and    $0xffff7ff0,%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,0xc(%rax)
  mov    -0x20(%rbp),%rax
  mov    0xc(%rax),%eax
  shr    $0x4,%eax
  sub    $0x3ff,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x28(%rbp),%rax
  movsd  (%rax),%xmm0
  mov    -0x20(%rbp),%rax
  movsd  (%rax),%xmm1
  subsd  %xmm1,%xmm0
  pxor   %xmm1,%xmm1
  ucomisd %xmm1,%xmm0
  jp     L25
  pxor   %xmm1,%xmm1
  ucomisd %xmm1,%xmm0
  jne    L25
  pxor   %xmm1,%xmm1
  cvtsi2sdl -0x34(%rbp),%xmm1
  movsd  D24(%rip),%xmm0
  mulsd  %xmm1,%xmm0
  jmp    L21
L25:
  addl   $0x1,-0x34(%rbp)
  mov    -0x34(%rbp),%eax
  shl    $0x4,%eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  mov    0xc(%rax),%eax
  mov    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  mov    %edx,0xc(%rax)
  mov    -0x28(%rbp),%rax
  movsd  (%rax),%xmm1
  movsd  D27(%rip),%xmm0
  mulsd  %xmm1,%xmm0
  mov    -0x28(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0x28(%rbp),%rax
  movsd  (%rax),%xmm0
  movsd  D77(%rip),%xmm1
  subsd  %xmm1,%xmm0
  mov    -0x28(%rbp),%rax
  movsd  (%rax),%xmm2
  movsd  D77(%rip),%xmm1
  addsd  %xmm2,%xmm1
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  movsd  -0x18(%rbp),%xmm0
  mulsd  %xmm0,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movsd  -0x10(%rbp),%xmm1
  movsd  D105(%rip),%xmm0
  mulsd  %xmm0,%xmm1
  movsd  D87(%rip),%xmm0
  addsd  %xmm1,%xmm0
  movapd %xmm0,%xmm1
  mulsd  -0x10(%rbp),%xmm1
  movsd  D18(%rip),%xmm0
  addsd  %xmm1,%xmm0
  movapd %xmm0,%xmm1
  mulsd  -0x10(%rbp),%xmm1
  movsd  D61(%rip),%xmm0
  addsd  %xmm1,%xmm0
  movapd %xmm0,%xmm1
  mulsd  -0x10(%rbp),%xmm1
  movsd  D71(%rip),%xmm0
  addsd  %xmm1,%xmm0
  mulsd  -0x18(%rbp),%xmm0
  movsd  %xmm0,-0x30(%rbp)
  pxor   %xmm0,%xmm0
  cvtsi2sdl -0x34(%rbp),%xmm0
  movsd  D21(%rip),%xmm2
  movapd %xmm0,%xmm1
  subsd  %xmm2,%xmm1
  movsd  D24(%rip),%xmm0
  mulsd  %xmm0,%xmm1
  movsd  -0x30(%rbp),%xmm0
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x30(%rbp)
  mov    -0x20(%rbp),%rax
  movsd  (%rax),%xmm0
L21:
  movq   %xmm0,%rax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L34
  call   <__stack_chk_fail@plt>
L34:
  movq   %rax,%xmm0
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_tag: D24
type_infered: byte[8]
name: disassemble_data
arguments: data_tag: D27
type_infered: f64
name: disassemble_data
arguments: data_tag: D77
type_infered: f64
name: disassemble_data
arguments: data_tag: D105
type_infered: f64
name: disassemble_data
arguments: data_tag: D87
type_infered: f64
name: disassemble_data
arguments: data_tag: D18
type_infered: f64
name: disassemble_data
arguments: data_tag: D61
type_infered: f64
name: disassemble_data
arguments: data_tag: D71
type_infered: f64
name: disassemble_data
arguments: data_tag: D21
type_infered: f64

tool: {"D24": [0xec,0x39,0xfa,0xfe,0x42,0x2e,0xe6,0x3f]}

tool: D27: 1.4142135623730951

tool: D77: 1

tool: D105: 0.2376245609

tool: D87: 0.28525381498

tool: D18: 0.4000059794795

tool: D61: 0.666666635059382

tool: D71: 2.000000000046727

tool: D21: 0.5

assistant: ```c
double math_log(double x) {
  typedef union {
    double d;
    unsigned u[4];
  } DBL;
  double y, z, z2, p;
  unsigned ex;
  int ix;
  DBL *xp, *yp;
  xp = (DBL *)&x;
  if (xp->d <= 0.0)
    return (y);
  y = 0.0;
  yp = (DBL *)&y;
  yp->u[3] = xp->u[3] & ~0100017;
  ix = (yp->u[3] >> 4) - 1023;
  if ((xp->d - yp->d) == 0.0)
    return (.693147180559945 * (double)ix);
  xp->u[3] -= ++ix << 4;
  xp->d *= 1.4142135623730950488;
  z = (xp->d - 1.0) / (xp->d + 1.0);
  z2 = z * z;
  y = z * (2.000000000046727 + z2 * (0.666666635059382 + z2 * (0.4000059794795 + z2 * (0.28525381498 + z2 * 0.2376245609))));
  y = y + .693147180559945 * ((double)ix - 0.5);
  return (yp->d);
}
```