user: 请从给定的汇编指令推导出C源代码:

```asm
<iirFilter>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  push   %r14
  mov    %r8d,%r14d
  push   %r13
  mov    %rsi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  movsd  (%rsi),%xmm0
  ucomisd D6(%rip),%xmm0
  mov    %rcx,0x18(%rsp)
  jp     L44
  lea    -0x1(%rdx),%ebx
  jne    L44
L24:
  mov    $0x8,%esi
  mov    %ebx,%edi
  mov    %edx,0x10(%rsp)
  call   <calloc@plt>
  mov    $0x8,%esi
  mov    %ebx,%edi
  mov    %rax,%rbp
  call   <calloc@plt>
  mov    $0x8,%esi
  mov    %r14d,%edi
  mov    %rax,%r12
  call   <calloc@plt>
  test   %ebx,%ebx
  mov    0x10(%rsp),%edx
  mov    %rax,0x8(%rsp)
  jle    L64
  lea    -0x2(%rdx),%eax
  xor    %esi,%esi
  mov    %r12,%rdi
  lea    0x8(,%rax,8),%rdx
  mov    %rdx,0x10(%rsp)
  call   <memset@plt>
  mov    0x10(%rsp),%rdx
  xor    %esi,%esi
  mov    %rbp,%rdi
  call   <memset@plt>
L64:
  test   %r14d,%r14d
  jle    L60
  mov    0x8(%rsp),%rdi
  mov    %r14d,%edx
  xor    %esi,%esi
  shl    $0x3,%rdx
  call   <memset@plt>
  mov    0x18(%rsp),%rbx
  mov    0x8(%rsp),%rcx
  lea    -0x1(%r14),%eax
  movsd  (%r12),%xmm1
  movsd  0x8(%r12),%xmm3
  movsd  0x10(%r12),%xmm5
  movsd  0x18(%r12),%xmm2
  lea    0x8(%rbx,%rax,8),%rdx
  sub    %rbx,%rcx
  nopl   (%rax)
L30:
  movsd  (%r15),%xmm0
  movsd  0x8(%r15),%xmm4
  lea    (%rcx,%rbx,1),%rax
  add    $0x8,%rbx
  mulsd  -0x8(%rbx),%xmm0
  mulsd  0x0(%rbp),%xmm4
  mulsd  0x10(%r13),%xmm3
  mulsd  0x8(%r13),%xmm1
  mulsd  0x18(%r13),%xmm5
  mulsd  0x20(%r13),%xmm2
  addsd  %xmm4,%xmm0
  movsd  0x10(%r15),%xmm4
  mulsd  0x8(%rbp),%xmm4
  addsd  %xmm3,%xmm1
  addsd  %xmm4,%xmm0
  movsd  0x18(%r15),%xmm4
  mulsd  0x10(%rbp),%xmm4
  addsd  %xmm5,%xmm1
  addsd  %xmm2,%xmm1
  addsd  %xmm4,%xmm0
  movsd  0x20(%r15),%xmm4
  mulsd  0x18(%rbp),%xmm4
  addsd  %xmm4,%xmm0
  subsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  movsd  0x10(%rbp),%xmm0
  movsd  %xmm0,0x18(%rbp)
  movsd  0x8(%rbp),%xmm0
  movsd  %xmm0,0x10(%rbp)
  movsd  0x0(%rbp),%xmm0
  movsd  %xmm0,0x8(%rbp)
  movsd  -0x8(%rbx),%xmm0
  movsd  %xmm0,0x0(%rbp)
  movsd  0x10(%r12),%xmm2
  movsd  0x8(%r12),%xmm5
  movsd  (%r12),%xmm3
  movsd  %xmm2,0x18(%r12)
  movsd  %xmm5,0x10(%r12)
  movsd  %xmm3,0x8(%r12)
  movsd  (%rax),%xmm1
  movsd  %xmm1,(%r12)
  cmp    %rbx,%rdx
  jne    L30
L60:
  mov    %rbp,%rdi
  call   <free@plt>
  mov    %r12,%rdi
  call   <free@plt>
  mov    0x8(%rsp),%rax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L44:
  lea    -0x1(%rdx),%ebx
  test   %edx,%edx
  jle    L24
  lea    -0x1(%rdx),%esi
  movapd %xmm0,%xmm1
  xor    %eax,%eax
  mov    %rsi,%rbx
  shl    $0x3,%rsi
  jmp    L36
  nopl   (%rax)
L61:
  movsd  0x0(%r13),%xmm1
  movsd  0x8(%r13,%rax,1),%xmm0
  add    $0x8,%rax
L36:
  divsd  %xmm1,%xmm0
  movsd  %xmm0,0x0(%r13,%rax,1)
  movsd  (%r15,%rax,1),%xmm0
  divsd  0x0(%r13),%xmm0
  movsd  %xmm0,(%r15,%rax,1)
  cmp    %rsi,%rax
  jne    L61
  jmp    L24
```

tool_calls: name: retrieve_data
arguments: data_tag: D6
datatype: f32[2]

tool: {"D6": [0.0,1.875]}

assistant: ```c
double *iirFilter(double *B, double *A, int filterLength, double *signal, int signalLength) {
  int i;
  double *x, *y, *output;
  double zeros = 0;
  double poles = 0;
  if (A[0] != 1) {
    for (i = 0; i < filterLength; i++) {
      A[i] = A[i] / A[0];
      B[i] = B[i] / A[0];
    }
  }
  x = (double *)calloc((filterLength - 1), sizeof(double));
  y = (double *)calloc((filterLength - 1), sizeof(double));
  output = (double *)calloc((signalLength), sizeof(double));
  for (i = 0; i < filterLength - 1; i++)
    y[i] = 0;
  for (i = 0; i < filterLength - 1; i++)
    x[i] = 0;
  for (i = 0; i < signalLength; i++)
    output[i] = 0;
  for (i = 0; i < signalLength; i++) {
    zeros = B[0] * signal[i] + B[1] * x[0] + B[2] * x[1] + B[3] * x[2] + B[4] * x[3];
    poles = A[1] * y[0] + A[2] * y[1] + A[3] * y[2] + A[4] * y[3];
    output[i] = zeros - poles;
    x[3] = x[2];
    x[2] = x[1];
    x[1] = x[0];
    x[0] = signal[i];
    y[3] = y[2];
    y[2] = y[1];
    y[1] = y[0];
    y[0] = output[i];
  }
  free(x);
  free(y);
  return output;
}
```