user: 请将以下的汇编代码转换成C语言代码：

```asm
<ttheta>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %rdx,-0x48(%rbp)
  mov    %ecx,-0x4c(%rbp)
  mov    %r8d,-0x50(%rbp)
  movss  D6(%rip),%xmm0
  movss  %xmm0,-0x18(%rbp)
  movl   $0x0,-0x24(%rbp)
  jmp    L33
L21:
  pxor   %xmm0,%xmm0
  cvtsi2ssl -0x24(%rbp),%xmm0
  mov    -0x48(%rbp),%rax
  add    $0x8,%rax
  movss  (%rax),%xmm2
  movaps %xmm0,%xmm1
  subss  %xmm2,%xmm1
  mov    -0x48(%rbp),%rax
  add    $0xc,%rax
  movss  (%rax),%xmm0
  mulss  %xmm1,%xmm0
  movss  %xmm0,-0x14(%rbp)
  mov    -0x24(%rbp),%eax
  imul   -0x50(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  movl   $0x0,-0x20(%rbp)
  jmp    L18
L24:
  pxor   %xmm0,%xmm0
  cvtsi2ssl -0x20(%rbp),%xmm0
  mov    -0x48(%rbp),%rax
  movss  (%rax),%xmm2
  movaps %xmm0,%xmm1
  subss  %xmm2,%xmm1
  mov    -0x48(%rbp),%rax
  add    $0x4,%rax
  movss  (%rax),%xmm0
  mulss  %xmm1,%xmm0
  movss  %xmm0,-0x10(%rbp)
  mov    -0x48(%rbp),%rax
  add    $0x30,%rax
  movss  (%rax),%xmm0
  movaps %xmm0,%xmm1
  mulss  -0x10(%rbp),%xmm1
  mov    -0x48(%rbp),%rax
  add    $0x34,%rax
  movss  (%rax),%xmm0
  mulss  -0x14(%rbp),%xmm0
  addss  %xmm1,%xmm0
  movss  %xmm0,-0xc(%rbp)
  mov    -0x48(%rbp),%rax
  add    $0x24,%rax
  movss  (%rax),%xmm0
  movaps %xmm0,%xmm1
  mulss  -0x10(%rbp),%xmm1
  mov    -0x48(%rbp),%rax
  add    $0x28,%rax
  movss  (%rax),%xmm0
  mulss  -0x14(%rbp),%xmm0
  addss  %xmm1,%xmm0
  movss  %xmm0,-0x8(%rbp)
  movss  -0x8(%rbp),%xmm0
  mov    -0xc(%rbp),%eax
  movaps %xmm0,%xmm1
  movd   %eax,%xmm0
  call   <atan2f@plt>
  movd   %xmm0,%eax
  mov    -0x1c(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x40(%rbp),%rdx
  add    %rcx,%rdx
  movd   %eax,%xmm0
  mulss  -0x18(%rbp),%xmm0
  movss  %xmm0,(%rdx)
  mov    -0x48(%rbp),%rax
  add    $0x18,%rax
  movss  (%rax),%xmm0
  movaps %xmm0,%xmm1
  mulss  -0x10(%rbp),%xmm1
  mov    -0x48(%rbp),%rax
  add    $0x1c,%rax
  movss  (%rax),%xmm0
  mulss  -0x14(%rbp),%xmm0
  addss  %xmm0,%xmm1
  mov    -0x48(%rbp),%rax
  add    $0x10,%rax
  movss  (%rax),%xmm0
  addss  %xmm1,%xmm0
  movss  %xmm0,-0x4(%rbp)
  movss  -0x8(%rbp),%xmm0
  movaps %xmm0,%xmm1
  mulss  %xmm0,%xmm1
  movss  -0xc(%rbp),%xmm0
  mulss  %xmm0,%xmm0
  addss  %xmm0,%xmm1
  movd   %xmm1,%eax
  movd   %eax,%xmm0
  call   <sqrtf@plt>
  movd   %xmm0,%eax
  movss  -0x4(%rbp),%xmm0
  movaps %xmm0,%xmm1
  movd   %eax,%xmm0
  call   <atan2f@plt>
  movd   %xmm0,%eax
  mov    -0x1c(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x38(%rbp),%rdx
  add    %rcx,%rdx
  movd   %eax,%xmm0
  mulss  -0x18(%rbp),%xmm0
  movss  %xmm0,(%rdx)
  addl   $0x1,-0x20(%rbp)
  addl   $0x1,-0x1c(%rbp)
L18:
  mov    -0x20(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jl     L24
  addl   $0x1,-0x24(%rbp)
L33:
  mov    -0x24(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L21
  nop
  nop
  leave
  ret
```

tool_calls: name: read_data
arguments: label: D6
data_type: byte[4]

tool: {"D6": [0x83,0xf9,0xa2,0x3e]}

assistant: ```c
void ttheta(float *restrict tth, float *restrict eta, float *restrict p, int ns, int nf) {
  int i, j, a, row;
  float s, f, x, y, z, th, et, OPI;
  OPI = 1.0 / 3.14159265358979323846f;
#pragma omp parallel for private(s, f, x, y, z, j, a, i)
  for (i = 0; i < ns; i++) {
    s = (i - p[2]) * p[3];
    a = i * nf;
    for (j = 0; j < nf; j++, a++) {
      f = (j - p[0]) * p[1];
      z = p[5 + 7] * f + p[5 + 8] * s;
      y = p[5 + 4] * f + p[5 + 5] * s;
      eta[a] = atan2f(z, y) * OPI;
      x = p[5 + 1] * f + p[5 + 2] * s + p[4];
      tth[a] = atan2f(sqrtf(y * y + z * z), x) * OPI;
    }
  }
}
```