user: 这段汇编代码用C语言表示是什么样的？

```asm
<filter_fft>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %edi,%r15d
  mov    %esi,%r8d
  mov    %rdx,%rbx
  mov    %rcx,%rbp
  mov    $0x1,%eax
  mov    %esi,%ecx
  shl    %cl,%eax
  mov    %eax,0x1c(%rsp)
  movslq %eax,%r12
  mov    %r12,%rsi
  sar    %rsi
  cmp    $0x1,%r12
  jle    L23
  mov    %r12,%r9
  sub    $0x1,%r9
  mov    $0x0,%edx
  mov    $0x0,%ecx
L103:
  cmp    %rsi,%rdx
  jl     L50
  mov    %rsi,%rax
L177:
  sub    %rax,%rdx
  sar    %rax
  cmp    %rax,%rdx
  jge    L177
L29:
  add    %rax,%rdx
  add    $0x1,%rcx
  cmp    %r9,%rcx
  je     L23
  cmp    %rcx,%rdx
  jle    L103
  movss  (%rbx,%rcx,4),%xmm1
  movss  0x0(%rbp,%rcx,4),%xmm0
  lea    0x0(,%rdx,4),%rax
  lea    (%rbx,%rax,1),%rdi
  movss  (%rdi),%xmm2
  movss  %xmm2,(%rbx,%rcx,4)
  add    %rbp,%rax
  movss  (%rax),%xmm2
  movss  %xmm2,0x0(%rbp,%rcx,4)
  movss  %xmm1,(%rdi)
  movss  %xmm0,(%rax)
  jmp    L103
L50:
  mov    %rsi,%rax
  jmp    L29
L23:
  movslq %r8d,%rax
  mov    %rax,0x10(%rsp)
  test   %rax,%rax
  jle    L198
  pxor   %xmm5,%xmm5
  movss  %xmm5,0x18(%rsp)
  movss  D61(%rip),%xmm5
  mov    $0x1,%r13d
  mov    $0x0,%r14d
  jmp    L1
L179:
  movss  (%rcx,%rax,4),%xmm2
  movss  (%rdx,%rax,4),%xmm0
  movaps %xmm2,%xmm1
  mulss  %xmm4,%xmm1
  movaps %xmm0,%xmm6
  mulss  %xmm3,%xmm6
  subss  %xmm6,%xmm1
  mulss  %xmm4,%xmm0
  mulss  %xmm3,%xmm2
  addss  %xmm2,%xmm0
  movss  (%rbx,%rax,4),%xmm2
  subss  %xmm1,%xmm2
  movss  %xmm2,(%rcx,%rax,4)
  movss  0x0(%rbp,%rax,4),%xmm2
  subss  %xmm0,%xmm2
  movss  %xmm2,(%rdx,%rax,4)
  addss  (%rbx,%rax,4),%xmm1
  movss  %xmm1,(%rbx,%rax,4)
  addss  0x0(%rbp,%rax,4),%xmm0
  movss  %xmm0,0x0(%rbp,%rax,4)
  add    %r13,%rax
  cmp    %rax,%r12
  jg     L179
L46:
  movaps %xmm5,%xmm0
  mulss  %xmm4,%xmm0
  movss  0x18(%rsp),%xmm7
  movaps %xmm7,%xmm1
  mulss  %xmm3,%xmm1
  subss  %xmm1,%xmm0
  mulss  %xmm5,%xmm3
  mulss  %xmm7,%xmm4
  addss  %xmm4,%xmm3
  add    $0x1,%rsi
  cmp    %rdi,%rsi
  je     L13
  movaps %xmm0,%xmm4
L190:
  mov    %rsi,%rax
  cmp    %rsi,%r12
  jg     L179
  jmp    L46
L13:
  cvtss2sd %xmm5,%xmm5
  movsd  %xmm5,0x8(%rsp)
  movsd  D17(%rip),%xmm0
  subsd  %xmm5,%xmm0
  mulsd  D12(%rip),%xmm0
  call   <sqrt@plt>
  movss  %xmm0,0x18(%rsp)
  test   %r15d,%r15d
  je     L155
  xorps  D57(%rip),%xmm0
  movss  %xmm0,0x18(%rsp)
L155:
  movsd  0x8(%rsp),%xmm0
  addsd  D17(%rip),%xmm0
  mulsd  D12(%rip),%xmm0
  call   <sqrt@plt>
  movaps %xmm0,%xmm5
  add    $0x1,%r14
  cmp    0x10(%rsp),%r14
  je     L198
L1:
  mov    %r13,%rdi
  add    %r13,%r13
  test   %rdi,%rdi
  jle    L13
  lea    0x0(,%rdi,4),%rdx
  lea    (%rbx,%rdx,1),%rcx
  add    %rbp,%rdx
  pxor   %xmm3,%xmm3
  movss  D65(%rip),%xmm4
  mov    $0x0,%esi
  jmp    L190
L198:
  test   %r15d,%r15d
  je     L68
  test   %r12,%r12
  jle    L68
  mov    $0x0,%eax
  pxor   %xmm1,%xmm1
  cvtsi2ssl 0x1c(%rsp),%xmm1
L181:
  movss  (%rbx,%rax,4),%xmm0
  divss  %xmm1,%xmm0
  movss  %xmm0,(%rbx,%rax,4)
  movss  0x0(%rbp,%rax,4),%xmm0
  divss  %xmm1,%xmm0
  movss  %xmm0,0x0(%rbp,%rax,4)
  add    $0x1,%rax
  cmp    %rax,%r12
  jne    L181
L68:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: parse_data
arguments: data_label: D61
type: byte[4]
name: parse_data
arguments: data_label: D17
type: f64
name: parse_data
arguments: data_label: D12
type: f32[2]
name: parse_data
arguments: data_label: D57
type: byte[16]
name: parse_data
arguments: data_label: D65
type: byte[4]

tool: {"D61": [0x00,0x00,0x80,0xbf]}

tool: D17: 1

tool: {"D12": [0.0,1.75]}

tool: {"D57": [0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00]}

tool: {"D65": [0x00,0x00,0x80,0x3f]}

assistant: ```c
void filter_fft(int dir, int m, float *real, float *imag) {
  long n, i, i1, j, k, i2, l, l1, l2;
  float c1, c2, tx, ty, t1, t2, u1, u2, z;
  n = 1 << m;
  i2 = n >> 1;
  j = 0;
  for (i = 0; i < n - 1; i++) {
    if (i < j) {
      tx = real[i];
      ty = imag[i];
      real[i] = real[j];
      imag[i] = imag[j];
      real[j] = tx;
      imag[j] = ty;
    }
    k = i2;
    while (k <= j) {
      j -= k;
      k >>= 1;
    }
    j += k;
  }
  c1 = -1.0;
  c2 = 0.0;
  l2 = 1;
  for (l = 0; l < m; l++) {
    l1 = l2;
    l2 <<= 1;
    u1 = 1.0;
    u2 = 0.0;
    for (j = 0; j < l1; j++) {
      for (i = j; i < n; i += l2) {
        i1 = i + l1;
        t1 = u1 * real[i1] - u2 * imag[i1];
        t2 = u1 * imag[i1] + u2 * real[i1];
        real[i1] = real[i] - t1;
        imag[i1] = imag[i] - t2;
        real[i] += t1;
        imag[i] += t2;
      }
      z = u1 * c1 - u2 * c2;
      u2 = u1 * c2 + u2 * c1;
      u1 = z;
    }
    c2 = sqrt((1.0 - c1) / 2.0);
    if (dir) {
      c2 = -c2;
    }
    c1 = sqrt((1.0 + c1) / 2.0);
  }
  if (dir) {
    for (i = 0; i < n; i++) {
      real[i] /= n;
      imag[i] /= n;
    }
  }
}
```