user: 请从给定的汇编指令推导出C源代码：

```asm
<resfft>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %esi,-0x3c(%rbp)
  mov    %edx,-0x40(%rbp)
  mov    -0x3c(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  mov    %eax,-0x20(%rbp)
  pxor   %xmm0,%xmm0
  movss  %xmm0,-0x28(%rbp)
  movl   $0x1,-0x30(%rbp)
  jmp    L0
L16:
  mov    -0x30(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  movss  -0x28(%rbp),%xmm1
  addss  %xmm1,%xmm0
  movss  %xmm0,-0x28(%rbp)
  addl   $0x2,-0x30(%rbp)
L0:
  mov    -0x30(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L16
  movss  -0x28(%rbp),%xmm0
  addss  %xmm0,%xmm0
  movss  %xmm0,-0x28(%rbp)
  mov    -0x24(%rbp),%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x38(%rbp),%rax
  movss  (%rax),%xmm0
  mov    -0x10(%rbp),%rax
  movss  %xmm0,(%rax)
  mov    -0x24(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x10(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
  movl   $0x1,-0x30(%rbp)
  jmp    L9
L59:
  mov    -0x30(%rbp),%eax
  add    %eax,%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x18(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  subss  %xmm1,%xmm0
  movss  %xmm0,-0x14(%rbp)
  mov    -0x18(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x30(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  addss  -0x14(%rbp),%xmm0
  movss  %xmm0,(%rax)
  mov    -0x18(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x24(%rbp),%eax
  sub    -0x30(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  subss  -0x14(%rbp),%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0x30(%rbp)
L9:
  mov    -0x30(%rbp),%eax
  cmp    -0x20(%rbp),%eax
  jl     L59
  mov    -0x40(%rbp),%edx
  mov    -0x24(%rbp),%ecx
  mov    -0x10(%rbp),%rax
  mov    %ecx,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <rsfft@plt>
  pxor   %xmm1,%xmm1
  cvtsi2sdl -0x3c(%rbp),%xmm1
  movsd  D9(%rip),%xmm0
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x8(%rbp)
  movl   $0x1,-0x2c(%rbp)
  jmp    L3
L22:
  pxor   %xmm0,%xmm0
  cvtsi2sdl -0x2c(%rbp),%xmm0
  mulsd  -0x8(%rbp),%xmm0
  movq   %xmm0,%rax
  movq   %rax,%xmm0
  call   <sin@plt>
  lea    (%rax,%rax,1),%edx
  mov    -0x24(%rbp),%eax
  sub    -0x2c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x10(%rbp),%rax
  add    %rcx,%rax
  movss  (%rax),%xmm0
  pxor   %xmm1,%xmm1
  cvtsi2ss %edx,%xmm1
  mov    -0x24(%rbp),%eax
  sub    -0x2c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  divss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0x2c(%rbp)
L3:
  mov    -0x2c(%rbp),%eax
  cmp    -0x20(%rbp),%eax
  jl     L22
  mov    -0x10(%rbp),%rax
  movss  (%rax),%xmm0
  addss  -0x28(%rbp),%xmm0
  mov    -0x38(%rbp),%rax
  movss  %xmm0,(%rax)
  mov    -0x10(%rbp),%rax
  movss  (%rax),%xmm0
  mov    -0x24(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  subss  -0x28(%rbp),%xmm0
  movss  %xmm0,(%rax)
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x38(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
  movl   $0x1,-0x2c(%rbp)
  jmp    L65
L44:
  mov    -0x24(%rbp),%eax
  sub    -0x2c(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  addss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  subss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0x2c(%rbp)
L65:
  mov    -0x2c(%rbp),%eax
  cmp    -0x20(%rbp),%eax
  jl     L44
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: data_tag: D9
type_infered: f64

tool: D9: 3.141592653589793

assistant: ```c
void resfft(float *x, int n, int m) {
  int n2, n4, i, j, k, nk;
  float b0, yt, *y;
  double e;
  void rsfft();
  n2 = n;
  n4 = n2 / 2;
  for (b0 = 0, i = 1; i < n2; i += 2)
    b0 += x[i];
  b0 *= 2;
  y = (float *)malloc(n2 * sizeof(float));
  y[0] = x[0];
  y[n4] = x[n2];
  for (i = 1; i < n4; i++) {
    j = 2 * i;
    yt = x[j + 1] - x[j - 1];
    y[i] = x[j] + yt;
    y[n2 - i] = x[j] - yt;
  }
  rsfft(y, n2, m);
  e = 3.141592653589793 / n;
  for (k = 1; k < n4; k++)
    y[n2 - k] /= 2 * sin(e * k);
  x[0] = y[0] + b0;
  x[n2] = y[0] - b0;
  x[n4] = y[n4];
  for (k = 1; k < n4; k++) {
    nk = n2 - k;
    x[k] = y[k] + y[nk];
    x[nk] = y[k] - y[nk];
  }
  free(y);
}
```