user: 请将以下的汇编代码转换成C语言代码:

```asm
<pandg_back>:
  endbr64
  push   %r14
  movd   %xmm0,%r14d
  push   %r13
  mov    %rdi,%r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  push   %rbx
  sub    $0x20,%rsp
  movss  %xmm1,0x10(%rsp)
  pxor   %xmm1,%xmm1
  cvtss2sd (%rdi),%xmm1
  movss  %xmm2,0x14(%rsp)
  pxor   %xmm2,%xmm2
  mulsd  D10(%rip),%xmm1
  cvtss2sd (%rsi),%xmm2
  mulsd  D27(%rip),%xmm2
  cvtsd2ss %xmm1,%xmm1
  movaps %xmm1,%xmm0
  movss  %xmm1,0x18(%rsp)
  cvtsd2ss %xmm2,%xmm2
  movss  %xmm2,0xc(%rsp)
  call   <cos@plt>
  movss  0xc(%rsp),%xmm2
  mov    %eax,%ebx
  movaps %xmm2,%xmm0
  movss  %xmm2,0x1c(%rsp)
  call   <cos@plt>
  imul   %eax,%ebx
  mov    %ebx,%edi
  call   <asin@plt>
  movss  0x18(%rsp),%xmm1
  pxor   %xmm3,%xmm3
  cvtsd2ss %xmm0,%xmm3
  movss  %xmm3,0xc(%rsp)
  movaps %xmm1,%xmm0
  call   <sin@plt>
  movss  0x18(%rsp),%xmm1
  mov    %eax,%ebx
  movaps %xmm1,%xmm0
  call   <cos@plt>
  movss  0x1c(%rsp),%xmm2
  mov    %eax,%ebp
  movaps %xmm2,%xmm0
  call   <sin@plt>
  mov    %ebp,%edi
  mov    %ebx,%esi
  imul   %eax,%edi
  neg    %esi
  call   <atan2@plt>
  movss  %xmm0,0x18(%rsp)
  movd   %r14d,%xmm0
  call   <sin@plt>
  movss  0xc(%rsp),%xmm0
  mov    %eax,%ebx
  call   <sin@plt>
  movd   %r14d,%xmm0
  imul   %eax,%ebx
  call   <cos@plt>
  movss  0xc(%rsp),%xmm0
  mov    %eax,%ebp
  call   <cos@plt>
  movss  0x18(%rsp),%xmm1
  subss  0x14(%rsp),%xmm1
  imul   %eax,%ebp
  movaps %xmm1,%xmm0
  movss  %xmm1,0x14(%rsp)
  call   <cos@plt>
  imul   %eax,%ebp
  sub    %ebp,%ebx
  mov    %ebx,%edi
  call   <asin@plt>
  mulsd  D35(%rip),%xmm0
  cvtsd2ss %xmm0,%xmm0
  movss  %xmm0,0x0(%r13)
  movd   %r14d,%xmm0
  call   <sin@plt>
  movss  0xc(%rsp),%xmm0
  mov    %eax,%ebp
  call   <cos@plt>
  movss  0x14(%rsp),%xmm1
  imul   %eax,%ebp
  movaps %xmm1,%xmm0
  call   <cos@plt>
  movd   %r14d,%xmm0
  imul   %eax,%ebp
  call   <cos@plt>
  movss  0xc(%rsp),%xmm0
  mov    %eax,%ebx
  call   <sin@plt>
  movss  0xc(%rsp),%xmm0
  imul   %eax,%ebx
  call   <cos@plt>
  movss  0x14(%rsp),%xmm1
  add    %ebx,%ebp
  movaps %xmm1,%xmm0
  mov    %eax,%ebx
  call   <sin@plt>
  mov    %ebx,%edi
  mov    %ebp,%esi
  imul   %eax,%edi
  call   <atan2@plt>
  subss  0x10(%rsp),%xmm0
  cvtss2sd %xmm0,%xmm0
  mulsd  D0(%rip),%xmm0
  cvtsd2ss %xmm0,%xmm0
  movss  %xmm0,(%r12)
  add    $0x20,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
```

tool_calls: name: unpack_data
arguments: data_tag: D10
type_infered: byte[8]
name: unpack_data
arguments: data_tag: D27
type_infered: byte[8]
name: unpack_data
arguments: data_tag: D35
type_infered: byte[8]
name: unpack_data
arguments: data_tag: D0
type_infered: byte[8]

tool: {"D10": [0x18,0x39,0x35,0x9d,0x46,0xdf,0x91,0x3f]}

tool: {"D27": [0x18,0x39,0x35,0x9d,0x46,0xdf,0x91,0xbf]}

tool: {"D35": [0xaa,0x9f,0x96,0x22,0xdc,0xa5,0x4c,0x40]}

tool: {"D0": [0xaa,0x9f,0x96,0x22,0xdc,0xa5,0x4c,0xc0]}

assistant: ```c
void pandg_back(float *lat, float *lon, float a, float b, float r) {
  float pr, gr, pm, gm;
  pr = (3.1415926 / 180.0) * *lat;
  gr = -(3.1415926 / 180.0) * *lon;
  pm = asin(cos(pr) * cos(gr));
  gm = atan2(cos(pr) * sin(gr), -sin(pr));
  *lat = (180.0 / 3.1415926) * asin(sin(a) * sin(pm) - cos(a) * cos(pm) * cos(gm - r));
  *lon = -(180.0 / 3.1415926) * (-b + atan2(cos(pm) * sin(gm - r), sin(a) * cos(pm) * cos(gm - r) + cos(a) * sin(pm)));
}
```