user: Demonstrate the C code that generates the assembly output below:

```asm
<dcs_photonuclear_f2a_BM>:
  endbr64
  sub    $0x68,%rsp
  mulsd  D143(%rip),%xmm4
  movsd  %xmm1,0x50(%rsp)
  movsd  D8(%rip),%xmm1
  movsd  %xmm2,0x20(%rsp)
  movsd  %xmm0,0x58(%rsp)
  movsd  %xmm3,0x18(%rsp)
  movapd %xmm4,%xmm6
  movapd %xmm4,%xmm7
  addsd  %xmm4,%xmm1
  movsd  %xmm4,0x30(%rsp)
  addsd  %xmm4,%xmm6
  addsd  D206(%rip),%xmm7
  movapd %xmm4,%xmm0
  divsd  %xmm1,%xmm0
  movapd %xmm6,%xmm2
  divsd  %xmm7,%xmm2
  addsd  D80(%rip),%xmm0
  mulsd  D196(%rip),%xmm0
  movsd  %xmm0,0x8(%rsp)
  movapd %xmm3,%xmm0
  addsd  D80(%rip),%xmm2
  mulsd  D133(%rip),%xmm2
  movapd %xmm2,%xmm1
  xorpd  D130(%rip),%xmm1
  movsd  %xmm2,0x28(%rsp)
  call   <pow@plt>
  movsd  0x30(%rsp),%xmm4
  movsd  D39(%rip),%xmm1
  movsd  0x28(%rsp),%xmm2
  movsd  %xmm0,0x10(%rsp)
  addsd  %xmm4,%xmm1
  movapd %xmm4,%xmm6
  movsd  %xmm4,0x48(%rsp)
  divsd  %xmm1,%xmm6
  movsd  D80(%rip),%xmm1
  addsd  %xmm2,%xmm1
  movapd %xmm6,%xmm0
  call   <pow@plt>
  movsd  0x10(%rsp),%xmm7
  mulsd  D12(%rip),%xmm7
  movsd  0x18(%rsp),%xmm3
  movsd  D80(%rip),%xmm6
  movsd  D112(%rip),%xmm1
  addsd  0x8(%rsp),%xmm1
  subsd  %xmm3,%xmm6
  movsd  %xmm3,0x38(%rsp)
  mulsd  %xmm0,%xmm7
  movapd %xmm6,%xmm0
  movsd  %xmm6,0x18(%rsp)
  movsd  %xmm7,0x40(%rsp)
  call   <pow@plt>
  movsd  0x8(%rsp),%xmm5
  addsd  D94(%rip),%xmm5
  movsd  0x18(%rsp),%xmm6
  movsd  %xmm0,0x10(%rsp)
  movapd %xmm5,%xmm1
  movapd %xmm6,%xmm0
  movsd  %xmm6,0x28(%rsp)
  call   <pow@plt>
  movsd  0x38(%rsp),%xmm3
  movsd  D199(%rip),%xmm1
  movsd  %xmm0,0x30(%rsp)
  movapd %xmm3,%xmm0
  call   <pow@plt>
  movsd  0x28(%rsp),%xmm6
  movsd  0x8(%rsp),%xmm1
  movsd  %xmm0,0x18(%rsp)
  movapd %xmm6,%xmm0
  call   <pow@plt>
  movsd  0x48(%rsp),%xmm4
  movsd  D53(%rip),%xmm5
  movsd  D178(%rip),%xmm1
  movsd  %xmm0,0x8(%rsp)
  addsd  %xmm4,%xmm5
  divsd  %xmm5,%xmm4
  movapd %xmm4,%xmm0
  call   <pow@plt>
  movsd  0x18(%rsp),%xmm5
  mulsd  0x8(%rsp),%xmm5
  movsd  D128(%rip),%xmm3
  movsd  0x28(%rsp),%xmm6
  movsd  D112(%rip),%xmm1
  movsd  0x30(%rsp),%xmm9
  movsd  0x40(%rsp),%xmm7
  movsd  0x50(%rsp),%xmm8
  movapd %xmm5,%xmm2
  movsd  D204(%rip),%xmm5
  mulsd  %xmm0,%xmm2
  mulsd  %xmm2,%xmm3
  mulsd  D142(%rip),%xmm2
  mulsd  %xmm3,%xmm5
  mulsd  %xmm6,%xmm2
  movapd %xmm5,%xmm0
  movsd  0x58(%rsp),%xmm5
  mulsd  %xmm2,%xmm1
  addsd  %xmm2,%xmm3
  subsd  %xmm5,%xmm8
  addsd  %xmm1,%xmm0
  movapd %xmm9,%xmm1
  mulsd  %xmm7,%xmm1
  addsd  %xmm1,%xmm0
  movsd  0x10(%rsp),%xmm1
  mulsd  %xmm7,%xmm1
  mulsd  %xmm8,%xmm0
  addsd  %xmm3,%xmm1
  mulsd  %xmm5,%xmm1
  addsd  %xmm1,%xmm0
  mulsd  0x20(%rsp),%xmm0
  add    $0x68,%rsp
  ret
```

tool_calls: name: retrieve_data
arguments: label: D143
datatype: byte[8]
name: retrieve_data
arguments: label: D8
datatype: byte[8]
name: retrieve_data
arguments: label: D206
datatype: byte[8]
name: retrieve_data
arguments: label: D80
datatype: f64
name: retrieve_data
arguments: label: D196
datatype: f64
name: retrieve_data
arguments: label: D133
datatype: f64
name: retrieve_data
arguments: label: D130
datatype: byte[16]
name: retrieve_data
arguments: label: D39
datatype: byte[8]
name: retrieve_data
arguments: label: D12
datatype: f64
name: retrieve_data
arguments: label: D112
datatype: f64
name: retrieve_data
arguments: label: D94
datatype: f64
name: retrieve_data
arguments: label: D199
datatype: byte[8]
name: retrieve_data
arguments: label: D53
datatype: byte[8]
name: retrieve_data
arguments: label: D178
datatype: f64
name: retrieve_data
arguments: label: D128
datatype: f64
name: retrieve_data
arguments: label: D204
datatype: byte[8]
name: retrieve_data
arguments: label: D142
datatype: f64

tool: {"D143": [0x00,0x00,0x00,0x00,0x80,0x84,0x2e,0x41]}

tool: {"D8": [0x00,0x00,0x00,0x00,0x68,0x1c,0x47,0x41]}

tool: {"D206": [0x00,0x00,0x00,0x00,0xe4,0x9b,0x36,0x41]}

tool: D80: 1

tool: D196: 1.5

tool: D133: 0.0988

tool: {"D130": [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00]}

tool: {"D39": [0x00,0x00,0x00,0x00,0x20,0xad,0x0e,0x41]}

tool: D12: 0.12

tool: D112: 4

tool: D94: 1.8152

tool: {"D199": [0xbe,0xc1,0x17,0x26,0x53,0x05,0xe3,0x3f]}

tool: {"D53": [0x00,0x00,0x00,0x00,0xd0,0xe0,0x22,0x41]}

tool: D178: 0.4056

tool: D128: 1.2437

tool: {"D204": [0x00,0x00,0x00,0x00,0x00,0x00,0xd0,0x3f]}

tool: D142: 0.1853

assistant: ```c
double dcs_photonuclear_f2a_BM(double Z, double A, double shadowing, double x, double Q2) {
  Q2 *= 1E+06;
  const double a = 0.2513E+06;
  const double b = 0.6186E+06;
  const double c = 3.0292E+06;
  const double d = 1.4817E+06;
  const double intercept_pomeron = 0.0988;
  const double intercept_reggeon = 0.4056;
  const double tau = 1.8152;
  const double A_s = 0.12;
  const double B_up = 1.2437;
  const double B_down = 0.1853;
  const double n = 1.5 * (1. + Q2 / (Q2 + c));
  const double dl = intercept_pomeron * (1. + 2. * Q2 / (Q2 + d));
  double aux = A_s * pow(x, -dl) * pow(Q2 / (Q2 + a), 1. + dl);
  const double F_proton_singlet = aux * pow(1. - x, n + 4.);
  const double F_neutron_singlet = aux * pow(1. - x, n + tau);
  aux = pow(x, 1. - intercept_reggeon) * pow(1. - x, n) * pow(Q2 / (Q2 + b), intercept_reggeon);
  const double Up_valence = B_up * aux;
  const double Down_valence = B_down * aux * (1. - x);
  const double F_proton_non_singlet = Up_valence + Down_valence;
  const double F_neutron_non_singlet = Up_valence / 4. + Down_valence * 4.;
  const double structure_function_proton = F_proton_singlet + F_proton_non_singlet;
  const double structure_function_neutron = F_neutron_singlet + F_neutron_non_singlet;
  return shadowing * (Z * structure_function_proton + (A - Z) * structure_function_neutron);
}
```