user: 请从给定的汇编指令推导出C源代码：

```asm
<target_phi>:
  endbr64
  push   %r14
  push   %rbx
  sub    $0x108,%rsp
  mov    %rdi,%rcx
  mov    %rsi,%rbx
  mov    %fs:0x28,%rax
  mov    %rax,0xf8(%rsp)
  xor    %eax,%eax
  movss  D71(%rip),%xmm0
  movss  %xmm0,0x70(%rsp)
  movss  %xmm0,0x74(%rsp)
  movl   $0xc1900000,0x78(%rsp)
  movl   $0xc1901aa0,0x7c(%rsp)
  movl   $0x0,0x80(%rsp)
  movl   $0x0,0x84(%rsp)
  movl   $0x0,0x88(%rsp)
  movl   $0x0,0x8c(%rsp)
  movl   $0x0,0x90(%rsp)
  movl   $0x0,0x94(%rsp)
  movss  D361(%rip),%xmm0
  movss  %xmm0,0xa0(%rsp)
  movss  %xmm0,0xa4(%rsp)
  movl   $0x41900000,0xa8(%rsp)
  movl   $0x418fe76d,0xac(%rsp)
  movl   $0x0,0xb0(%rsp)
  movl   $0x0,0xb4(%rsp)
  movl   $0x0,0xb8(%rsp)
  movl   $0x0,0xbc(%rsp)
  movl   $0x0,0xc0(%rsp)
  movl   $0x0,0xc4(%rsp)
  movq   $0x0,0xd0(%rsp)
  movq   $0x0,0xd8(%rsp)
  movq   $0x0,0xe0(%rsp)
  movq   $0x0,0xe8(%rsp)
  movq   $0x0,0xf0(%rsp)
  test   %edx,%edx
  jle    L47
  mov    %edx,%edx
  movss  D227(%rip),%xmm2
  jmp    L17
L30:
  subss  %xmm1,%xmm0
  movaps %xmm2,%xmm1
  divss  %xmm0,%xmm1
  movss  %xmm1,0xd0(%rsp,%rax,4)
L64:
  add    $0x1,%rax
  cmp    %rdx,%rax
  je     L47
L17:
  movss  0x70(%rsp,%rax,4),%xmm1
  movss  0xa0(%rsp,%rax,4),%xmm0
  ucomiss %xmm0,%xmm1
  jp     L30
  jne    L30
  jmp    L64
L47:
  movss  0xd0(%rsp),%xmm1
  movss  (%rcx),%xmm0
  movss  D361(%rip),%xmm4
  subss  %xmm4,%xmm0
  movaps %xmm0,%xmm2
  mulss  %xmm1,%xmm2
  movss  D333(%rip),%xmm0
  movaps %xmm2,%xmm13
  addss  %xmm0,%xmm13
  movaps %xmm13,%xmm14
  movss  %xmm13,0x28(%rsp)
  mulss  (%rbx),%xmm1
  movss  0xd4(%rsp),%xmm3
  movss  0x4(%rcx),%xmm2
  subss  %xmm4,%xmm2
  mulss  %xmm3,%xmm2
  movaps %xmm2,%xmm7
  addss  %xmm0,%xmm7
  movaps %xmm7,%xmm8
  movss  %xmm7,0xc(%rsp)
  mulss  0x4(%rbx),%xmm3
  movss  %xmm3,0x18(%rsp)
  movss  0xd8(%rsp),%xmm3
  movss  0x8(%rcx),%xmm2
  subss  D203(%rip),%xmm2
  mulss  %xmm3,%xmm2
  movaps %xmm2,%xmm10
  addss  %xmm0,%xmm10
  movaps %xmm10,%xmm11
  movss  %xmm10,0x24(%rsp)
  movaps %xmm3,%xmm2
  mulss  0x8(%rbx),%xmm2
  movss  %xmm2,0x1c(%rsp)
  movss  0xdc(%rsp),%xmm3
  movss  0xc(%rcx),%xmm2
  subss  D54(%rip),%xmm2
  mulss  %xmm3,%xmm2
  movaps %xmm2,%xmm9
  addss  %xmm0,%xmm9
  movss  %xmm9,0x8(%rsp)
  movaps %xmm3,%xmm4
  mulss  0xc(%rbx),%xmm4
  movss  %xmm4,0x20(%rsp)
  movaps %xmm13,%xmm2
  mulss  %xmm13,%xmm2
  movaps %xmm7,%xmm5
  mulss  %xmm7,%xmm7
  movss  %xmm7,0x30(%rsp)
  movaps %xmm10,%xmm6
  mulss  %xmm10,%xmm6
  movss  %xmm6,0x68(%rsp)
  movaps %xmm9,%xmm15
  mulss  %xmm9,%xmm15
  movss  %xmm15,0x2c(%rsp)
  mulss  D60(%rip),%xmm13
  movss  %xmm13,0x34(%rsp)
  movaps %xmm8,%xmm4
  mulss  D124(%rip),%xmm4
  movss  %xmm4,0x38(%rsp)
  movaps %xmm14,%xmm12
  mulss  D413(%rip),%xmm12
  movss  %xmm12,0x3c(%rsp)
  mulss  D115(%rip),%xmm10
  movss  %xmm10,0x40(%rsp)
  movaps %xmm11,%xmm0
  mulss  %xmm6,%xmm0
  mulss  D359(%rip),%xmm0
  movss  %xmm0,0x10(%rsp)
  movaps %xmm14,%xmm0
  mulss  %xmm2,%xmm0
  movaps %xmm0,%xmm6
  mulss  D292(%rip),%xmm6
  movss  %xmm6,0x14(%rsp)
  movaps %xmm7,%xmm6
  mulss  D395(%rip),%xmm6
  movss  %xmm6,0x44(%rsp)
  mulss  %xmm11,%xmm6
  movss  %xmm6,0x48(%rsp)
  mulss  D331(%rip),%xmm5
  movss  %xmm5,0x4c(%rsp)
  movaps %xmm14,%xmm0
  mulss  D113(%rip),%xmm0
  addss  D239(%rip),%xmm0
  movaps %xmm11,%xmm3
  mulss  D451(%rip),%xmm3
  addss  %xmm3,%xmm0
  movaps %xmm13,%xmm3
  mulss  %xmm8,%xmm3
  addss  %xmm3,%xmm0
  mulss  %xmm11,%xmm4
  addss  %xmm4,%xmm0
  movaps %xmm12,%xmm3
  mulss  %xmm9,%xmm3
  addss  %xmm3,%xmm0
  movaps %xmm10,%xmm3
  movaps %xmm9,%xmm12
  mulss  %xmm9,%xmm3
  addss  %xmm3,%xmm0
  movaps %xmm9,%xmm3
  mulss  D104(%rip),%xmm3
  addss  %xmm3,%xmm0
  movaps %xmm8,%xmm3
  mulss  D344(%rip),%xmm3
  addss  %xmm3,%xmm0
  movaps %xmm14,%xmm3
  mulss  D17(%rip),%xmm3
  mulss  %xmm15,%xmm3
  addss  %xmm3,%xmm0
  movss  0x10(%rsp),%xmm3
  mulss  %xmm9,%xmm3
  addss  %xmm3,%xmm0
  mulss  D61(%rip),%xmm14
  movaps %xmm14,%xmm3
  mulss  %xmm7,%xmm3
  addss  %xmm3,%xmm0
  movaps %xmm11,%xmm3
  mulss  D353(%rip),%xmm3
  mulss  %xmm15,%xmm3
  addss  %xmm3,%xmm0
  movss  0x14(%rsp),%xmm3
  movaps %xmm8,%xmm4
  mulss  %xmm8,%xmm3
  addss  %xmm3,%xmm0
  mulss  %xmm9,%xmm6
  addss  %xmm6,%xmm0
  mulss  %xmm11,%xmm5
  movaps %xmm5,%xmm3
  mulss  %xmm15,%xmm3
  addss  %xmm3,%xmm0
  movaps %xmm7,%xmm6
  mulss  D329(%rip),%xmm6
  movss  %xmm6,0x50(%rsp)
  movaps %xmm8,%xmm9
  mulss  D478(%rip),%xmm9
  movss  %xmm9,0x54(%rsp)
  mulss  %xmm11,%xmm9
  movss  %xmm9,0x58(%rsp)
  movaps %xmm2,%xmm5
  mulss  D238(%rip),%xmm5
  movss  %xmm5,0x5c(%rsp)
  mulss  %xmm8,%xmm5
  movss  %xmm5,0x60(%rsp)
  mulss  %xmm11,%xmm6
  addss  %xmm6,%xmm0
  movaps %xmm9,%xmm3
  mulss  %xmm12,%xmm3
  addss  %xmm3,%xmm0
  mulss  %xmm11,%xmm5
  addss  %xmm5,%xmm0
  mulss  %xmm7,%xmm4
  movaps %xmm4,%xmm3
  mulss  D23(%rip),%xmm3
  movss  %xmm3,0x64(%rsp)
  mulss  %xmm11,%xmm3
  movaps %xmm3,%xmm7
  addss  %xmm0,%xmm7
  movd   %xmm7,%r14d
  pxor   %xmm3,%xmm3
  movaps %xmm1,%xmm0
  addss  %xmm3,%xmm0
  addss  0x18(%rsp),%xmm0
  addss  0x1c(%rsp),%xmm0
  addss  0x20(%rsp),%xmm0
  ucomiss %xmm3,%xmm0
  jp     L89
  movaps %xmm3,%xmm0
  jne    L89
L67:
  movss  %xmm0,(%rbx)
  mov    0xf8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L21
  movd   %r14d,%xmm0
  add    $0x108,%rsp
  pop    %rbx
  pop    %r14
  ret
L89:
  mulss  %xmm1,%xmm1
  movss  %xmm1,0x6c(%rsp)
  movss  0xc(%rsp),%xmm5
  movaps %xmm5,%xmm0
  mulss  D60(%rip),%xmm0
  subss  D475(%rip),%xmm0
  movss  0x8(%rsp),%xmm1
  mulss  D413(%rip),%xmm1
  addss  %xmm1,%xmm0
  movss  0x2c(%rsp),%xmm4
  mulss  D17(%rip),%xmm4
  addss  %xmm4,%xmm0
  movss  0x30(%rsp),%xmm1
  mulss  D61(%rip),%xmm1
  addss  %xmm1,%xmm0
  mulss  D247(%rip),%xmm2
  mulss  %xmm5,%xmm2
  addss  %xmm2,%xmm0
  movss  0x28(%rsp),%xmm2
  mulss  D481(%rip),%xmm2
  movaps %xmm2,%xmm1
  mulss  %xmm5,%xmm1
  mulss  0x24(%rsp),%xmm1
  addss  %xmm1,%xmm0
  mov    $0x2,%edi
  call   <pow@plt>
  mulss  0x6c(%rsp),%xmm0
  movss  %xmm0,0x6c(%rsp)
  movss  0x18(%rsp),%xmm3
  mulss  %xmm3,%xmm3
  movss  %xmm3,0x18(%rsp)
  pxor   %xmm0,%xmm0
  addss  0x34(%rsp),%xmm0
  movss  0x24(%rsp),%xmm4
  movaps %xmm4,%xmm2
  mulss  D124(%rip),%xmm2
  addss  %xmm2,%xmm0
  subss  D385(%rip),%xmm0
  movss  0xc(%rsp),%xmm5
  movaps %xmm5,%xmm6
  mulss  D281(%rip),%xmm6
  movaps %xmm6,%xmm1
  mulss  0x28(%rsp),%xmm1
  addss  %xmm1,%xmm0
  addss  0x14(%rsp),%xmm0
  movaps %xmm5,%xmm2
  mulss  D121(%rip),%xmm2
  movaps %xmm2,%xmm1
  mulss  %xmm4,%xmm1
  movss  0x8(%rsp),%xmm7
  mulss  %xmm7,%xmm1
  addss  %xmm1,%xmm0
  movaps %xmm4,%xmm1
  mulss  D331(%rip),%xmm1
  mulss  0x2c(%rsp),%xmm1
  addss  %xmm1,%xmm0
  movaps %xmm5,%xmm1
  mulss  D401(%rip),%xmm1
  mulss  %xmm4,%xmm1
  addss  %xmm1,%xmm0
  movaps %xmm4,%xmm1
  mulss  D478(%rip),%xmm1
  mulss  %xmm7,%xmm1
  addss  %xmm1,%xmm0
  movss  0x5c(%rsp),%xmm8
  mulss  %xmm4,%xmm8
  addss  %xmm8,%xmm0
  movss  0x30(%rsp),%xmm1
  mulss  D49(%rip),%xmm1
  mulss  %xmm4,%xmm1
  addss  %xmm1,%xmm0
  mov    $0x2,%edi
  call   <pow@plt>
  mulss  0x18(%rsp),%xmm0
  addss  0x6c(%rsp),%xmm0
  movss  %xmm0,0x14(%rsp)
  movss  0x1c(%rsp),%xmm3
  mulss  %xmm3,%xmm3
  movss  %xmm3,0x18(%rsp)
  movss  0x38(%rsp),%xmm0
  addss  D451(%rip),%xmm0
  movss  0x8(%rsp),%xmm7
  movaps %xmm7,%xmm1
  mulss  D115(%rip),%xmm1
  addss  %xmm1,%xmm0
  movss  0x68(%rsp),%xmm1
  mulss  D154(%rip),%xmm1
  mulss  %xmm7,%xmm1
  addss  %xmm1,%xmm0
  movss  0x2c(%rsp),%xmm6
  movaps %xmm6,%xmm2
  mulss  D353(%rip),%xmm2
  addss  %xmm2,%xmm0
  movss  0x44(%rsp),%xmm1
  mulss  %xmm7,%xmm1
  addss  %xmm1,%xmm0
  movss  0x4c(%rsp),%xmm1
  mulss  %xmm6,%xmm1
  addss  %xmm1,%xmm0
  addss  0x50(%rsp),%xmm0
  movss  0x54(%rsp),%xmm1
  mulss  %xmm7,%xmm1
  addss  %xmm1,%xmm0
  addss  0x60(%rsp),%xmm0
  addss  0x64(%rsp),%xmm0
  mov    $0x2,%edi
  call   <pow@plt>
  mulss  0x18(%rsp),%xmm0
  movaps %xmm0,%xmm3
  addss  0x14(%rsp),%xmm3
  movss  %xmm3,0x14(%rsp)
  movss  0x20(%rsp),%xmm6
  mulss  %xmm6,%xmm6
  movss  %xmm6,0x18(%rsp)
  pxor   %xmm0,%xmm0
  addss  0x3c(%rsp),%xmm0
  addss  0x40(%rsp),%xmm0
  addss  D104(%rip),%xmm0
  movss  0x8(%rsp),%xmm7
  movaps %xmm7,%xmm1
  mulss  D487(%rip),%xmm1
  mulss  0x28(%rsp),%xmm1
  addss  %xmm1,%xmm0
  addss  0x10(%rsp),%xmm0
  movaps %xmm7,%xmm1
  mulss  D10(%rip),%xmm1
  movss  0x24(%rsp),%xmm4
  mulss  %xmm4,%xmm1
  addss  %xmm1,%xmm0
  addss  0x48(%rsp),%xmm0
  mulss  D214(%rip),%xmm7
  movaps %xmm7,%xmm1
  mulss  0xc(%rsp),%xmm1
  mulss  %xmm4,%xmm1
  addss  %xmm1,%xmm0
  addss  0x58(%rsp),%xmm0
  mov    $0x2,%edi
  call   <pow@plt>
  mulss  0x18(%rsp),%xmm0
  addss  0x14(%rsp),%xmm0
  call   <sqrt@plt>
  jmp    L67
L21:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: tag: D71
data_type: byte[4]
name: disassemble_data
arguments: tag: D361
data_type: f32
name: disassemble_data
arguments: tag: D227
data_type: f32
name: disassemble_data
arguments: tag: D333
data_type: f32
name: disassemble_data
arguments: tag: D203
data_type: f32
name: disassemble_data
arguments: tag: D54
data_type: byte[4]
name: disassemble_data
arguments: tag: D60
data_type: byte[4]
name: disassemble_data
arguments: tag: D124
data_type: byte[4]
name: disassemble_data
arguments: tag: D413
data_type: byte[4]
name: disassemble_data
arguments: tag: D115
data_type: byte[4]
name: disassemble_data
arguments: tag: D359
data_type: byte[4]
name: disassemble_data
arguments: tag: D292
data_type: byte[4]
name: disassemble_data
arguments: tag: D395
data_type: byte[4]
name: disassemble_data
arguments: tag: D331
data_type: byte[4]
name: disassemble_data
arguments: tag: D113
data_type: byte[4]
name: disassemble_data
arguments: tag: D239
data_type: byte[4]
name: disassemble_data
arguments: tag: D451
data_type: byte[4]
name: disassemble_data
arguments: tag: D104
data_type: byte[4]
name: disassemble_data
arguments: tag: D344
data_type: byte[4]
name: disassemble_data
arguments: tag: D17
data_type: byte[4]
name: disassemble_data
arguments: tag: D61
data_type: byte[4]
name: disassemble_data
arguments: tag: D353
data_type: byte[4]
name: disassemble_data
arguments: tag: D329
data_type: byte[4]
name: disassemble_data
arguments: tag: D478
data_type: byte[4]
name: disassemble_data
arguments: tag: D238
data_type: byte[4]
name: disassemble_data
arguments: tag: D23
data_type: byte[4]
name: disassemble_data
arguments: tag: D475
data_type: byte[4]
name: disassemble_data
arguments: tag: D247
data_type: byte[4]
name: disassemble_data
arguments: tag: D481
data_type: byte[4]
name: disassemble_data
arguments: tag: D385
data_type: byte[4]
name: disassemble_data
arguments: tag: D281
data_type: byte[4]
name: disassemble_data
arguments: tag: D121
data_type: byte[4]
name: disassemble_data
arguments: tag: D401
data_type: byte[4]
name: disassemble_data
arguments: tag: D49
data_type: byte[4]
name: disassemble_data
arguments: tag: D154
data_type: byte[4]
name: disassemble_data
arguments: tag: D487
data_type: byte[4]
name: disassemble_data
arguments: tag: D10
data_type: byte[4]
name: disassemble_data
arguments: tag: D214
data_type: byte[4]

tool: {"D71": [0x00,0x00,0x70,0xc1]}

tool: D361: 15

tool: D227: 2

tool: D333: 1

tool: D203: 18

tool: {"D54": [0x6d,0xe7,0x8f,0x41]}

tool: {"D60": [0x53,0x07,0x3b,0x3b]}

tool: {"D124": [0x90,0xc6,0xaa,0xbb]}

tool: {"D413": [0xad,0xa7,0x9d,0xbb]}

tool: {"D115": [0xfb,0xf5,0x0e,0x3c]}

tool: {"D359": [0x6a,0x6a,0xc0,0xb8]}

tool: {"D292": [0x25,0x40,0x13,0xb8]}

tool: {"D395": [0x35,0xce,0xf7,0xb9]}

tool: {"D331": [0xe2,0x45,0xac,0x39]}

tool: {"D113": [0xd5,0xaa,0x69,0xbd]}

tool: {"D239": [0x5b,0x3b,0x9e,0x36]}

tool: {"D451": [0x8f,0xc4,0x8c,0x3d]}

tool: {"D104": [0x0e,0x7e,0x4d,0x38]}

tool: {"D344": [0x34,0x09,0xf8,0xb7]}

tool: {"D17": [0x73,0xac,0x5c,0xb8]}

tool: {"D61": [0xc9,0xe9,0xd9,0x37]}

tool: {"D353": [0x99,0xe8,0x3d,0x39]}

tool: {"D329": [0xb8,0x2d,0x5b,0x37]}

tool: {"D478": [0xd4,0xc5,0x16,0xb9]}

tool: {"D238": [0xb0,0x44,0xba,0x38]}

tool: {"D23": [0xa1,0xd9,0x33,0x39]}

tool: {"D475": [0xd5,0xaa,0x69,0x3d]}

tool: {"D247": [0x38,0xe0,0xdc,0xb8]}

tool: {"D481": [0xb0,0x44,0x3a,0x39]}

tool: {"D385": [0x34,0x09,0xf8,0x37]}

tool: {"D281": [0xc9,0xe9,0x59,0x38]}

tool: {"D121": [0x35,0xce,0x77,0xba]}

tool: {"D401": [0xb8,0x2d,0xdb,0x37]}

tool: {"D49": [0x39,0xe3,0x06,0x3a]}

tool: {"D154": [0xd0,0x4f,0x90,0xb9]}

tool: {"D487": [0x73,0xac,0xdc,0xb8]}

tool: {"D10": [0x99,0xe8,0xbd,0x39]}

tool: {"D214": [0xe2,0x45,0x2c,0x3a]}

assistant: ```c
float target_phi(float *x, float *dx, int m) {
  int ncoeff = 20;
  float avdat = 0.4717516E-05;
  float xmin[10] = {-0.15000E+02, -0.15000E+02, -0.18000E+02, -0.18013E+02, 0.00000E+00, 0.00000E+00, 0.00000E+00, 0.00000E+00, 0.00000E+00, 0.00000E+00};
  float xmax[10] = {0.15000E+02, 0.15000E+02, 0.18000E+02, 0.17988E+02, 0.00000E+00, 0.00000E+00, 0.00000E+00, 0.00000E+00, 0.00000E+00, 0.00000E+00};
  float scale[10] = {0};
  float coeff[21] = {-0.18391417E-08, -0.57047684E-01, 0.68734281E-01, 0.28538301E-02, -0.52116588E-02, -0.48112483E-02, 0.87256385E-02, 0.48993206E-04, -0.29568189E-04, -0.52612693E-04, -0.91750946E-04, 0.25977281E-04, 0.18111094E-03, -0.35107270E-04, -0.47265147E-03, 0.32858463E-03, 0.13064062E-04, -0.14378811E-03, 0.88819652E-04, 0.17151843E-03, 0.};
  int ientry = 0;
  int i;
  if (ientry == 0) {
    ientry = 1;
    for (i = 0; i < m; i++) {
      if (xmin[i] == xmax[i])
        continue;
      scale[i] = 2. / (xmax[i] - xmin[i]);
    }
  }
  float x1 = 1. + (x[0] - xmax[0]) * scale[0];
  float dx1 = dx[0] * scale[0];
  float x2 = 1. + (x[1] - xmax[1]) * scale[1];
  float dx2 = dx[1] * scale[1];
  float x3 = 1. + (x[2] - xmax[2]) * scale[2];
  float dx3 = dx[2] * scale[2];
  float x4 = 1. + (x[3] - xmax[3]) * scale[3];
  float dx4 = dx[3] * scale[3];
  float x11 = x1;
  float x12 = x11 * x1;
  float x13 = x12 * x1;
  float x21 = x2;
  float x22 = x21 * x2;
  float x23 = x22 * x2;
  float x31 = x3;
  float x32 = x31 * x3;
  float x33 = x32 * x3;
  float x41 = x4;
  float x42 = x41 * x4;
  float v_target_phi = avdat + coeff[0] + coeff[1] * x11 + coeff[2] * x31 + coeff[3] * x11 * x21 + coeff[4] * x21 * x31 + coeff[5] * x11 * x41 + coeff[6] * x31 * x41 + coeff[7] * x41;
  v_target_phi = v_target_phi + coeff[8] * x21 + coeff[9] * x11 * x42 + coeff[10] * x33 * x41 + coeff[11] * x11 * x22 + coeff[12] * x31 * x42 + coeff[13] * x13 * x21 + coeff[14] * x22 * x31 * x41 + coeff[15] * x21 * x31 * x42 + coeff[16] * x22 * x31;
  v_target_phi = v_target_phi + coeff[17] * x21 * x31 * x41 + coeff[18] * x12 * x21 * x31 + coeff[19] * x23 * x31;
  float dxall = 0 + dx1 + dx2 + dx3 + dx4;
  float dv_target_phi = dxall == 0 ? 0 : sqrt(+dx1 * dx1 * pow(0 + coeff[1] + coeff[3] * x21 + coeff[5] * x41 + coeff[9] * x42 + coeff[11] * x22 + 3 * coeff[13] * x12 * x21 + 2 * coeff[18] * x11 * x21 * x31, 2) + dx2 * dx2 * pow(0 + coeff[3] * x11 + coeff[4] * x31 + coeff[8] + 2 * coeff[11] * x21 * x11 + coeff[13] * x13 + 2 * coeff[14] * x21 * x31 * x41 + coeff[15] * x31 * x42 + 2 * coeff[16] * x21 * x31 + coeff[17] * x31 * x41 + coeff[18] * x12 * x31 + 3 * coeff[19] * x22 * x31, 2) + dx3 * dx3 * pow(0 + coeff[2] + coeff[4] * x21 + coeff[6] * x41 + 3 * coeff[10] * x32 * x41 + coeff[12] * x42 + coeff[14] * x22 * x41 + coeff[15] * x21 * x42 + coeff[16] * x22 + coeff[17] * x21 * x41 + coeff[18] * x12 * x21 + coeff[19] * x23, 2) + dx4 * dx4 * pow(0 + coeff[5] * x11 + coeff[6] * x31 + coeff[7] + 2 * coeff[9] * x41 * x11 + coeff[10] * x33 + 2 * coeff[12] * x41 * x31 + coeff[14] * x22 * x31 + 2 * coeff[15] * x41 * x21 * x31 + coeff[17] * x21 * x31, 2));
  dx[0] = dv_target_phi;
  return v_target_phi;
}
```