user: 这段汇编代码用C语言表示是什么样的：

```asm
<cotd>:
  endbr64
  fldl   0xef6(%rip)        # 2000 <_fini+0xd78>
  fldt   0x8(%rsp)
  fcomi  %st(1),%st
  fstp   %st(1)
  ja     L77
  fldl   0xeea(%rip)        # 2008 <_fini+0xd80>
  fcomip %st(1),%st
  ja     L9
  fldz
  fxch   %st(1)
  fucomi %st(1),%st
  jp     L119
  je     L111
  fstp   %st(1)
  jmp    L55
L119:
  fstp   %st(1)
  nopw   0x0(%rax,%rax,1)
L55:
  fnstcw -0xa(%rsp)
  movzwl -0xa(%rsp),%eax
  or     $0xc,%ah
  mov    %ax,-0xc(%rsp)
  fld    %st(0)
  fldcw  -0xc(%rsp)
  fistpll -0x18(%rsp)
  fldcw  -0xa(%rsp)
  fildll -0x18(%rsp)
  fld    %st(1)
  fsub   %st(1),%st
  fldt   0xeb3(%rip)        # 2020 <_fini+0xd98>
  fmul   %st(3),%st
  fldz
  fxch   %st(4)
  fcomip %st(4),%st
  fstp   %st(3)
  jbe    L2
  fxch   %st(2)
  fadds  0xf3b(%rip)        # 20c0 <_fini+0xe38>
  fldcw  -0xc(%rsp)
  fistpll -0x18(%rsp)
  fldcw  -0xa(%rsp)
L11:
  fildll -0x18(%rsp)
  mov    -0x18(%rsp),%rax
  fld    %st(0)
  fmuls  0xf22(%rip)        # 20c4 <_fini+0xe3c>
  fsubrp %st,%st(2)
  fxch   %st(2)
  faddp  %st,%st(1)
  fld    %st(1)
  fmull  0xe60(%rip)        # 2010 <_fini+0xd88>
  faddp  %st,%st(1)
  fldt   0xe78(%rip)        # 2030 <_fini+0xda8>
  fmulp  %st,%st(2)
  fsubp  %st,%st(1)
  fldz
  fld    %st(1)
  fchs
  fxch   %st(1)
  fcomip %st(2),%st
  fcmovbe %st(1),%st
  and    $0x1,%eax
  fldt   0xe6f(%rip)        # 2040 <_fini+0xdb8>
  fcomip %st(1),%st
  fstp   %st(0)
  ja     L14
  fld    %st(0)
  fmul   %st(1),%st
  fldt   0xe6b(%rip)        # 2050 <_fini+0xdc8>
  fmul   %st(1),%st
  fldt   0xe73(%rip)        # 2060 <_fini+0xdd8>
  faddp  %st,%st(1)
  fmul   %st(1),%st
  fldt   0xe79(%rip)        # 2070 <_fini+0xde8>
  fsubrp %st,%st(1)
  fmul   %st(1),%st
  fmul   %st(2),%st
  faddp  %st,%st(2)
  fldt   0xe7b(%rip)        # 2080 <_fini+0xdf8>
  fmul   %st(1),%st
  fldt   0xe83(%rip)        # 2090 <_fini+0xe08>
  fsubrp %st,%st(1)
  fmul   %st(1),%st
  fldt   0xe89(%rip)        # 20a0 <_fini+0xe18>
  faddp  %st,%st(1)
  fmul   %st(1),%st
  fldt   0xe8f(%rip)        # 20b0 <_fini+0xe28>
  fsubrp %st,%st(1)
  fmulp  %st,%st(1)
  fld1
  faddp  %st,%st(1)
  test   %rax,%rax
  je     L75
  fxch   %st(1)
  fchs
L75:
  fdivp  %st,%st(1)
  ret
  nopl   (%rax)
L77:
  fstp   %st(0)
  jmp    L90
  nopl   0x0(%rax)
L9:
  fstp   %st(0)
L90:
  fldz
  jmp    L92
  cs nopw 0x0(%rax,%rax,1)
L111:
  fstp   %st(0)
L92:
  ret
  nopl   0x0(%rax,%rax,1)
L2:
  fxch   %st(2)
  fsubs  0xe60(%rip)        # 20c0 <_fini+0xe38>
  fldcw  -0xc(%rsp)
  fistpll -0x18(%rsp)
  fldcw  -0xa(%rsp)
  jmp    L11
  nopl   0x0(%rax)
L14:
  test   %rax,%rax
  je     L62
  fchs
  ret
L62:
  fld1
  fdivp  %st,%st(1)
  ret
```

assistant: ```c
long double cotd(long double x) {
  long int n;
  long double xn;
  long double f, g;
  long double x_int, x_fract;
  long double result;
  long double xnum, xden;
  if ((x > ((421657424.0L))) || (x < -((421657424.0L))) || (x == 0.0L)) {
    return 0.0L;
  }
  x_int = ((long double)(((long)(x))));
  x_fract = ((long double)(x) - (long double)(x_int));
  if (x > 0.0) {
    n = ((long)(((long double)(((long double)(x) * (long double)((0.63661977236758134307553505349006L)))) + (long double)(0.5))));
  } else {
    n = ((long)(((long double)(((long double)(x) * (long double)((0.63661977236758134307553505349006L)))) + (long double)(-0.5))));
  }
  xn = ((long double)(n));
  f = ((long double)(x_int) - (long double)(((long double)(xn) * (long double)((1.57080078125L)))));
  f = ((long double)(f) + (long double)(x_fract));
  f = ((long double)(f) - (long double)(((long double)(xn) * (long double)((-4.45445516561449039727449417114e-6L)))));
  f = ((long double)(f) - (long double)(((long double)(xn) * (long double)((6.2233721718966133922584676705e-14L)))));
  if (f < 0.0L) {
    g = -f;
  } else {
    g = f;
  }
  if (g < (+1.490116119385e-8L)) {
    if (n & 0x0001) {
      result = -f;
    } else {
      result = ((long double)(1.0L) / (long double)(f));
    }
    return result;
  }
  g = ((long double)(f) * (long double)(f));
  xnum = ((long double)(g) * (long double)((-1.7861707342254424711e-5L)));
  xnum = ((long double)(xnum) + (long double)((+3.4248878235890589960e-3L)));
  xnum = ((long double)(xnum) * (long double)(g));
  xnum = ((long double)(xnum) + (long double)((-1.3338350006421960681e-1L)));
  xnum = ((long double)(xnum) * (long double)(g));
  xnum = ((long double)(xnum) * (long double)(f));
  xnum = ((long double)(xnum) + (long double)(f));
  xden = ((long double)(g) * (long double)((+4.9819433993786512270e-7L)));
  xden = ((long double)(xden) + (long double)((-3.1181531907010027307e-4L)));
  xden = ((long double)(xden) * (long double)(g));
  xden = ((long double)(xden) + (long double)((+2.5663832289440112864e-2L)));
  xden = ((long double)(xden) * (long double)(g));
  xden = ((long double)(xden) + (long double)((-4.6671683339755294240e-1L)));
  xden = ((long double)(xden) * (long double)(g));
  xden = ((long double)(xden) + (long double)((+1.0000000000000000000L)));
  if (n & 0x0001) {
    xnum = -xnum;
  } else {
    result = xden;
    xden = xnum;
    xnum = result;
  }
  result = ((long double)(xnum) / (long double)(xden));
  return result;
}
```