user: 请从给定的汇编指令推导出C源代码：

```asm
<classify_region>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x70,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  movss  %xmm0,-0x54(%rbp)
  movss  %xmm1,-0x58(%rbp)
  movss  %xmm2,-0x5c(%rbp)
  mov    %edx,-0x60(%rbp)
  mov    %ecx,-0x64(%rbp)
  mov    %r8,-0x70(%rbp)
  mov    %r9d,-0x68(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  movl   $0x0,-0x38(%rbp)
  mov    -0x50(%rbp),%rax
  pxor   %xmm0,%xmm0
  movss  %xmm0,(%rax)
  mov    -0x8(%rbp),%rax
  movss  (%rax),%xmm0
  movss  %xmm0,-0x28(%rbp)
  mov    -0x8(%rbp),%rax
  movss  0x10(%rax),%xmm0
  movss  %xmm0,-0x24(%rbp)
  mov    -0x38(%rbp),%eax
  add    $0x8,%eax
  mov    %eax,-0x38(%rbp)
  movss  -0x54(%rbp),%xmm0
  cvttss2si %xmm0,%eax
  mov    %eax,-0x20(%rbp)
  movss  -0x58(%rbp),%xmm0
  cvttss2si %xmm0,%eax
  mov    %eax,-0x1c(%rbp)
  movss  -0x5c(%rbp),%xmm0
  mulss  -0x28(%rbp),%xmm0
  cvttss2si %xmm0,%eax
  mov    %eax,-0x18(%rbp)
  movss  -0x5c(%rbp),%xmm0
  mulss  -0x24(%rbp),%xmm0
  cvttss2si %xmm0,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x38(%rbp),%eax
  add    $0x4,%eax
  mov    %eax,-0x38(%rbp)
  cmpl   $0x0,-0x10(%rbp)
  jne    L64
  mov    $0x0,%eax
  jmp    L23
L64:
  movl   $0x0,-0x34(%rbp)
  jmp    L30
L27:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x38(%rbp),%eax
  add    $0x4,%eax
  mov    %eax,-0x38(%rbp)
  movl   $0x0,-0x30(%rbp)
  jmp    L56
L26:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rdi
  mov    -0x60(%rbp),%r9d
  mov    -0x14(%rbp),%r8d
  mov    -0x18(%rbp),%ecx
  mov    -0x1c(%rbp),%edx
  mov    -0x20(%rbp),%eax
  sub    $0x8,%rsp
  mov    0x18(%rbp),%esi
  push   %rsi
  mov    0x10(%rbp),%esi
  push   %rsi
  mov    -0x68(%rbp),%esi
  push   %rsi
  push   -0x70(%rbp)
  mov    -0x64(%rbp),%esi
  push   %rsi
  mov    %eax,%esi
  call   <get_dtree_output@plt>
  add    $0x30,%rsp
  mov    %rax,%rdx
  mov    -0x50(%rbp),%rax
  movss  (%rax),%xmm1
  pxor   %xmm0,%xmm0
  cvtsi2ss %rdx,%xmm0
  addss  %xmm1,%xmm0
  mov    -0x50(%rbp),%rax
  movss  %xmm0,(%rax)
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,%rdi
  call   <get_dtree_size@plt>
  mov    %eax,%edx
  mov    -0x38(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x38(%rbp)
  addl   $0x1,-0x30(%rbp)
L56:
  mov    -0x30(%rbp),%eax
  cmp    -0xc(%rbp),%eax
  jl     L26
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  movss  %xmm0,-0x2c(%rbp)
  mov    -0x38(%rbp),%eax
  add    $0x4,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x50(%rbp),%rax
  movss  (%rax),%xmm1
  movss  -0x2c(%rbp),%xmm0
  comiss %xmm1,%xmm0
  jb     L53
  mov    $0xffffffff,%eax
  jmp    L23
L53:
  addl   $0x1,-0x34(%rbp)
L30:
  mov    -0x34(%rbp),%eax
  cmp    -0x10(%rbp),%eax
  jl     L27
  mov    -0x50(%rbp),%rax
  movss  (%rax),%xmm0
  subss  -0x2c(%rbp),%xmm0
  mov    -0x50(%rbp),%rax
  movss  %xmm0,(%rax)
  mov    $0x1,%eax
L23:
  leave
  ret
```

assistant: ```c
int classify_region(void *od, float *o, float r, float c, float s, int cost, int sint, uint8_t pixels[], int nrows, int ncols, int ldim) {
  int8_t *ptr;
  int loc;
  int32_t nstages;
  float tsr, tsc;
  int i, j;
  int ir, ic, isr, isc;
  float threshold;
  ptr = (int8_t *)od;
  loc = 0;
  *o = 0.0f;
  tsr = *(float *)&ptr[0 * sizeof(float)];
  tsc = *(float *)&ptr[1 * sizeof(float)];
  loc += 2 * sizeof(float);
  ir = (int)(r);
  ic = (int)(c);
  isr = (int)(s * tsr);
  isc = (int)(s * tsc);
  nstages = *(int32_t *)&ptr[loc];
  loc += sizeof(int32_t);
  if (!nstages)
    return 0;
  i = 0;
  while (i < nstages) {
    int numtrees;
    numtrees = *(int32_t *)&ptr[loc];
    loc += sizeof(int32_t);
    for (j = 0; j < numtrees; ++j) {
      *o += get_dtree_output(&ptr[loc], ir, ic, isr, isc, cost, sint, pixels, nrows, ncols, ldim);
      loc += get_dtree_size(&ptr[loc]);
    }
    threshold = *(float *)&ptr[loc];
    loc += sizeof(float);
    if (*o <= threshold)
      return -1;
    ++i;
  }
  *o = *o - threshold;
  return 1;
}
```