user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<modelhess>:
  endbr64
  push   %r15
  mov    %rdx,%r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  push   %rbx
  movslq %esi,%rbx
  mov    %ebx,%edi
  mov    %rbx,%rbp
  imul   %ebx,%edi
  sub    $0x88,%rsp
  mov    %rcx,0x68(%rsp)
  shl    $0x3,%edi
  mov    %rbx,0x60(%rsp)
  call   <malloc@plt>
  mov    %rax,0x30(%rsp)
  test   %ebx,%ebx
  jle    L530
  lea    0x0(,%rbx,8),%rax
  lea    0x8(%r15),%r8
  mov    %ebx,%edi
  xor    %ecx,%ecx
  mov    %rax,0x8(%rsp)
  lea    -0x1(%rbx),%eax
  and    $0xfffffffe,%edi
  mov    %r15,%r9
  shl    $0x3,%rax
  mov    %r12,0x20(%rsp)
  mov    %ebx,%r14d
  mov    %rax,0x18(%rsp)
  add    %r8,%rax
  mov    %rax,0x10(%rsp)
  mov    %ebx,%eax
  shr    %eax
  lea    -0x1(%rax),%esi
  mov    %edi,%eax
  add    $0x1,%rsi
  lea    (%r15,%rax,8),%r10
  mov    %r12,%rax
  shl    $0x4,%rsi
  nopl   0x0(%rax)
L440:
  mov    %r9,%rdx
  add    $0x8,%r9
  cmp    %r8,%rax
  setne  %bl
  cmp    $0x1,%ebp
  setne  %r11b
  test   %r11b,%bl
  mov    0x8(%rsp),%rbx
  lea    (%rax,%rbx,1),%r11
  je     L261
  cmp    %r11,%rdx
  setae  %r13b
  cmp    %r9,%rax
  setae  %bl
  or     %r13b,%bl
  je     L261
  movsd  (%rdx),%xmm2
  xor    %ebx,%ebx
  unpcklpd %xmm2,%xmm2
  xchg   %ax,%ax
L658:
  movupd (%r15,%rbx,1),%xmm1
  movupd (%rax,%rbx,1),%xmm0
  mulpd  %xmm2,%xmm1
  divpd  %xmm1,%xmm0
  movups %xmm0,(%rax,%rbx,1)
  add    $0x10,%rbx
  cmp    %rsi,%rbx
  jne    L658
  cmp    %ebp,%edi
  je     L96
  movsd  (%rdx),%xmm1
  lea    (%rcx,%rdi,1),%eax
  mulsd  (%r10),%xmm1
  cltq
  lea    (%r12,%rax,8),%rax
  movsd  (%rax),%xmm0
  divsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
L96:
  mov    %r11,%rax
  add    %ebp,%ecx
  cmp    0x10(%rsp),%r9
  jne    L440
  mov    0x30(%rsp),%rdi
  mov    0x8(%rsp),%rdx
  mov    0x18(%rsp),%rsi
  mov    0x20(%rsp),%r11
  add    $0x8,%rdx
  mov    %rdi,%rax
  lea    0x8(%rdi,%rsi,1),%rcx
  nopw   0x0(%rax,%rax,1)
L660:
  movsd  (%r11),%xmm0
  add    $0x8,%rax
  add    %rdx,%r11
  movsd  %xmm0,-0x8(%rax)
  cmp    %rcx,%rax
  jne    L660
  mov    0x30(%rsp),%rbx
  mov    %ebp,%esi
  mov    %rbx,%rdi
  call   <array_max@plt>
  mov    %ebp,%esi
  mov    %rbx,%rdi
  movsd  %xmm0,0x8(%rsp)
  call   <array_min@plt>
  movsd  0x8(%rsp),%xmm3
  pxor   %xmm4,%xmm4
  movsd  %xmm4,0x10(%rsp)
  comisd %xmm4,%xmm3
  jbe    L607
  movsd  D48(%rip),%xmm4
  movq   %xmm3,%rbx
  mulsd  %xmm3,%xmm4
  movq   %xmm4,%r13
L448:
  mov    0x60(%rsp),%rax
  test   %ebp,%ebp
  mov    0x30(%rsp),%rdi
  movsd  %xmm0,0x18(%rsp)
  movsd  %xmm3,0x8(%rsp)
  lea    0x0(,%rax,8),%rdx
  mov    $0x8,%eax
  cmovle %rax,%rdx
  xor    %esi,%esi
  call   <memset@plt>
  movsd  0x18(%rsp),%xmm0
  movq   %r13,%xmm3
  pxor   %xmm2,%xmm2
  comisd %xmm0,%xmm3
  movsd  0x8(%rsp),%xmm3
  jae    L656
L323:
  mov    0x30(%rsp),%r8
  xor    %edi,%edi
  xor    %esi,%esi
  xor    %ecx,%ecx
  nopw   0x0(%rax,%rax,1)
L429:
  mov    $0x1,%eax
  cmp    $0x1,%ebp
  je     L531
  nopw   0x0(%rax,%rax,1)
L243:
  cmp    %ecx,%eax
  jle    L164
  lea    (%rax,%rdi,1),%edx
  movslq %edx,%rdx
  movsd  (%r12,%rdx,8),%xmm0
  movslq %esi,%rdx
  add    $0x1,%esi
  movsd  %xmm0,(%r8,%rdx,8)
L164:
  add    $0x1,%eax
  cmp    %eax,%ebp
  jne    L243
L531:
  add    $0x1,%ecx
  add    %ebp,%edi
  cmp    %ecx,%ebp
  jg     L429
L3:
  mov    0x30(%rsp),%rdi
  movsd  %xmm2,0x18(%rsp)
  movsd  %xmm3,0x8(%rsp)
  call   <array_max_abs@plt>
  movsd  D27(%rip),%xmm1
  movsd  0x8(%rsp),%xmm3
  movsd  0x18(%rsp),%xmm2
  mulsd  %xmm0,%xmm1
  comisd %xmm3,%xmm1
  jbe    L266
  movapd %xmm0,%xmm4
  subsd  %xmm3,%xmm4
  movsd  D7(%rip),%xmm3
  mulsd  %xmm0,%xmm3
  addsd  %xmm4,%xmm3
  addsd  %xmm3,%xmm2
  movapd %xmm1,%xmm3
L266:
  ucomisd 0x10(%rsp),%xmm3
  jp     L624
  jne    L624
  movsd  D3(%rip),%xmm2
  movapd %xmm2,%xmm3
L32:
  test   %ebp,%ebp
  jle    L195
  mov    0x60(%rsp),%rax
  xor    %edx,%edx
  lea    0x8(,%rax,8),%rcx
  mov    %r12,%rax
  nopl   0x0(%rax)
L546:
  movsd  (%rax),%xmm1
  add    $0x1,%edx
  addsd  %xmm2,%xmm1
  movsd  %xmm1,(%rax)
  add    %rcx,%rax
  cmp    %edx,%ebp
  jne    L546
L195:
  pxor   %xmm1,%xmm1
  cvtsi2sd %ebp,%xmm1
  divsd  %xmm1,%xmm0
  comisd %xmm0,%xmm3
  jbe    L282
L66:
  movsd  0x10(%rsp),%xmm4
  ucomisd %xmm3,%xmm4
  ja     L329
  sqrtsd %xmm3,%xmm3
  movapd %xmm3,%xmm0
L265:
  mov    0x68(%rsp),%rdx
  mov    %ebp,%esi
  mov    %r12,%rdi
  call   <cholmod@plt>
  movsd  0x10(%rsp),%xmm3
  movsd  %xmm0,0x70(%rsp)
  comisd %xmm3,%xmm0
  jbe    L561
  movsd  (%r12),%xmm4
  movsd  %xmm4,0x18(%rsp)
  test   %ebp,%ebp
  jle    L269
  mov    0x60(%rsp),%rax
  lea    0x8(%r12),%r14
  mov    %ebp,0x58(%rsp)
  xor    %r13d,%r13d
  mov    %r14,%rbx
  mov    %r12,0x40(%rsp)
  add    $0x1,%rax
  mov    %r15,0x78(%rsp)
  mov    %rax,0x38(%rsp)
  shl    $0x3,%rax
  mov    %rax,0x50(%rsp)
  sub    $0x8,%rax
  lea    (%r12,%rax,1),%rdi
  mov    %rax,0x48(%rsp)
  add    %rax,%rbx
  lea    -0x1(%rbp),%eax
  mov    %eax,0x5c(%rsp)
  mov    %rdi,0x28(%rsp)
  xor    %edi,%edi
  movsd  %xmm4,0x20(%rsp)
  mov    %rdi,%r15
  movsd  %xmm3,0x8(%rsp)
  nopw   0x0(%rax,%rax,1)
L536:
  add    $0x1,%r13d
  cmp    %r13d,0x58(%rsp)
  jle    L392
  mov    0x5c(%rsp),%eax
  mov    0x40(%rsp),%rdi
  mov    %r14,%rbp
  sub    %r13d,%eax
  add    %r15,%rax
  lea    0x10(%rdi,%rax,8),%r12
  nopw   0x0(%rax,%rax,1)
L371:
  movsd  0x0(%rbp),%xmm0
  add    $0x8,%rbp
  call   <fabs@plt>
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  addsd  0x8(%rsp),%xmm0
  movsd  %xmm0,0x8(%rsp)
  cmp    %r12,%rbp
  jne    L371
L392:
  movsd  0x8(%rsp),%xmm4
  movsd  -0x8(%r14),%xmm0
  movapd %xmm4,%xmm1
  addsd  %xmm0,%xmm1
  subsd  %xmm4,%xmm0
  maxsd  0x18(%rsp),%xmm1
  minsd  0x20(%rsp),%xmm0
  movsd  %xmm1,0x18(%rsp)
  movsd  %xmm0,0x20(%rsp)
  cmp    %r13d,0x58(%rsp)
  je     L578
  movsd  0x10(%rsp),%xmm3
  mov    0x28(%rsp),%r12
  movsd  %xmm3,0x8(%rsp)
  nopl   0x0(%rax)
L389:
  movsd  (%r12),%xmm0
  add    $0x8,%r12
  call   <fabs@plt>
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  addsd  0x8(%rsp),%xmm0
  movsd  %xmm0,0x8(%rsp)
  cmp    %rbx,%r12
  jne    L389
  mov    0x50(%rsp),%rdi
  mov    0x48(%rsp),%rsi
  add    0x38(%rsp),%r15
  add    %rsi,0x28(%rsp)
  add    %rdi,%r14
  add    %rdi,%rbx
  jmp    L536
L261:
  xor    %ebx,%ebx
  nopw   0x0(%rax,%rax,1)
L666:
  movsd  (%rdx),%xmm1
  mulsd  (%r15,%rbx,8),%xmm1
  movsd  (%rax,%rbx,8),%xmm0
  divsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax,%rbx,8)
  add    $0x1,%rbx
  cmp    %r14,%rbx
  jne    L666
  jmp    L96
L624:
  comisd 0x10(%rsp),%xmm2
  ja     L32
  pxor   %xmm1,%xmm1
  cvtsi2sd %ebp,%xmm1
  divsd  %xmm1,%xmm0
  comisd %xmm0,%xmm3
  ja     L66
L282:
  movsd  0x10(%rsp),%xmm3
  ucomisd %xmm0,%xmm3
  ja     L190
  sqrtsd %xmm0,%xmm0
  jmp    L265
L656:
  movq   %rbx,%xmm2
  subsd  %xmm0,%xmm2
  addsd  %xmm2,%xmm2
  mulsd  D48(%rip),%xmm2
  subsd  %xmm0,%xmm2
  addsd  %xmm2,%xmm3
  jmp    L323
L578:
  movsd  0x20(%rsp),%xmm3
  movapd %xmm1,%xmm0
  mov    0x40(%rsp),%r12
  mov    0x58(%rsp),%ebp
  mov    0x78(%rsp),%r15
  subsd  %xmm3,%xmm0
  mulsd  D48(%rip),%xmm0
  subsd  %xmm3,%xmm0
  movsd  0x10(%rsp),%xmm3
  comisd %xmm0,%xmm3
  ja     L566
  movsd  0x70(%rsp),%xmm3
  comisd %xmm0,%xmm3
  ja     L365
L160:
  test   %ebp,%ebp
  jle    L255
  mov    0x60(%rsp),%rax
  add    $0x1,%rax
  mov    %rax,0x38(%rsp)
L454:
  mov    0x38(%rsp),%rcx
  movsd  0x70(%rsp),%xmm1
  mov    %r12,%rax
  xor    %edx,%edx
  shl    $0x3,%rcx
  nopl   (%rax)
L451:
  movsd  (%rax),%xmm0
  add    $0x1,%edx
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  add    %rcx,%rax
  cmp    %edx,%ebp
  jne    L451
  mov    0x68(%rsp),%rdx
  pxor   %xmm0,%xmm0
  mov    %ebp,%esi
  mov    %r12,%rdi
  call   <cholmod@plt>
L468:
  mov    0x60(%rsp),%r11
  mov    %ebp,%edx
  mov    $0x8,%ecx
  lea    0x8(%r15),%r8
  shl    $0x3,%rdx
  mov    %r8,0x8(%rsp)
  mov    %r12,%rax
  mov    %r15,%r10
  shl    $0x3,%r11
  test   %ebp,%ebp
  cmovg  %rdx,%rcx
  mov    $0x1,%edx
  cmovg  %ebp,%edx
  xor    %r13d,%r13d
  xor    %ebx,%ebx
  mov    %rcx,0x10(%rsp)
  xor    %ecx,%ecx
  mov    %edx,%edi
  mov    %edx,0x18(%rsp)
  shr    %edx
  lea    -0x1(%rdx),%esi
  and    $0xfffffffe,%edi
  add    $0x1,%rsi
  movslq %edi,%rdx
  shl    $0x4,%rsi
  lea    (%r15,%rdx,8),%r9
  nopl   0x0(%rax,%rax,1)
L390:
  mov    0x10(%rsp),%r14
  mov    %r10,%rdx
  add    $0x8,%r10
  lea    (%r14,%r13,1),%r8
  add    %r12,%r8
  cmp    %r8,%rdx
  setae  %r14b
  cmp    %r10,%rax
  setae  %r8b
  or     %r14b,%r8b
  je     L227
  cmp    %rax,0x8(%rsp)
  setne  %r14b
  cmp    $0x1,%ebp
  setg   %r8b
  test   %r8b,%r14b
  je     L227
  movsd  (%rdx),%xmm2
  xor    %r8d,%r8d
  unpcklpd %xmm2,%xmm2
  cs nopw 0x0(%rax,%rax,1)
L474:
  movupd (%r15,%r8,1),%xmm1
  movupd (%rax,%r8,1),%xmm5
  mulpd  %xmm2,%xmm1
  mulpd  %xmm5,%xmm1
  movups %xmm1,(%rax,%r8,1)
  add    $0x10,%r8
  cmp    %rsi,%r8
  jne    L474
  cmp    0x18(%rsp),%edi
  je     L354
  lea    (%rdi,%rcx,1),%r8d
  movsd  (%r9),%xmm1
  mulsd  (%rdx),%xmm1
  movslq %r8d,%r8
  lea    (%r12,%r8,8),%r8
  mulsd  (%r8),%xmm1
  movsd  %xmm1,(%r8)
L354:
  add    $0x1,%ebx
  add    %r11,%rax
  add    %r11,%r13
  add    %ebp,%ecx
  cmp    %ebx,%ebp
  jg     L390
  mov    0x8(%rsp),%r8
  cmp    $0x1,%ebp
  jle    L377
  mov    0x68(%rsp),%r10
  mov    %r8,%rdi
  mov    %ebp,%esi
  mov    $0x1,%edx
  mov    $0x8,%r8d
  mov    $0x1,%r9d
  lea    (%r10,%r11,1),%rcx
  cs nopw 0x0(%rax,%rax,1)
L533:
  movslq %edx,%rax
  mov    %rdi,%rbx
  add    $0x8,%rdi
  shl    $0x3,%rax
  test   %edx,%edx
  cmovle %r8,%rax
  add    %rcx,%rax
  cmp    %rax,%rbx
  setae  %al
  cmp    %rdi,%rcx
  setae  %r12b
  or     %r12b,%al
  je     L122
  cmp    $0x2,%edx
  jle    L122
  test   %edx,%edx
  mov    %r9d,%r13d
  movsd  (%rbx),%xmm2
  cmovg  %edx,%r13d
  unpcklpd %xmm2,%xmm2
  mov    %r13d,%eax
  shr    %eax
  sub    $0x1,%eax
  shl    $0x4,%rax
  lea    0x10(%rcx,%rax,1),%r12
  mov    %rcx,%rax
  nopl   0x0(%rax,%rax,1)
L547:
  movupd (%rax),%xmm1
  add    $0x10,%rax
  mulpd  %xmm2,%xmm1
  movups %xmm1,-0x10(%rax)
  cmp    %r12,%rax
  jne    L547
  mov    %r13d,%eax
  and    $0xfffffffe,%eax
  and    $0x1,%r13d
  je     L281
  add    %esi,%eax
  cltq
  lea    (%r10,%rax,8),%rax
  movsd  (%rax),%xmm1
  mulsd  (%rbx),%xmm1
  movsd  %xmm1,(%rax)
L281:
  add    $0x1,%edx
  add    %r11,%rcx
  add    %ebp,%esi
  cmp    %edx,%ebp
  jne    L533
L377:
  mov    0x30(%rsp),%rdi
  movsd  %xmm0,0x8(%rsp)
  call   <free@plt>
  movsd  0x8(%rsp),%xmm0
  add    $0x88,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L122:
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L568:
  movsd  (%rcx,%rax,8),%xmm1
  mulsd  (%rbx),%xmm1
  movsd  %xmm1,(%rcx,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%edx
  jg     L568
  jmp    L281
L227:
  xor    %r8d,%r8d
  nopl   0x0(%rax,%rax,1)
L463:
  movsd  (%r15,%r8,8),%xmm1
  mulsd  (%rdx),%xmm1
  mulsd  (%rax,%r8,8),%xmm1
  movsd  %xmm1,(%rax,%r8,8)
  add    $0x1,%r8
  cmp    %r8d,%ebp
  jg     L463
  jmp    L354
L561:
  mov    0x68(%rsp),%rdx
  movapd %xmm3,%xmm0
  mov    %ebp,%esi
  mov    %r12,%rdi
  call   <cholmod@plt>
  test   %ebp,%ebp
  jg     L468
  jmp    L377
L607:
  movq   %xmm4,%r13
  movq   %xmm4,%rbx
  jmp    L448
L566:
  movsd  %xmm3,0x70(%rsp)
  jmp    L454
L530:
  mov    %rax,%rbx
  mov    %rax,%rdi
  mov    %ebp,%esi
  call   <array_max@plt>
  mov    %ebp,%esi
  mov    %rbx,%rdi
  movsd  %xmm0,0x8(%rsp)
  call   <array_min@plt>
  movsd  0x8(%rsp),%xmm3
  pxor   %xmm4,%xmm4
  movapd %xmm4,%xmm1
  movsd  %xmm4,0x10(%rsp)
  movapd %xmm4,%xmm2
  comisd %xmm4,%xmm3
  jbe    L80
  movsd  D48(%rip),%xmm2
  movapd %xmm3,%xmm1
  mulsd  %xmm3,%xmm2
L80:
  comisd %xmm0,%xmm2
  jae    L250
  pxor   %xmm2,%xmm2
  xor    %esi,%esi
  jmp    L3
L269:
  movapd %xmm4,%xmm0
  movsd  0x10(%rsp),%xmm3
  subsd  %xmm4,%xmm0
  mulsd  D48(%rip),%xmm0
  subsd  %xmm4,%xmm0
  comisd %xmm0,%xmm3
  jbe    L78
L255:
  mov    0x68(%rsp),%rdx
  mov    %ebp,%esi
  mov    %r12,%rdi
  pxor   %xmm0,%xmm0
  call   <cholmod@plt>
  jmp    L377
L250:
  subsd  %xmm0,%xmm1
  movsd  D48(%rip),%xmm2
  xor    %esi,%esi
  addsd  %xmm1,%xmm1
  mulsd  %xmm1,%xmm2
  subsd  %xmm0,%xmm2
  addsd  %xmm2,%xmm3
  jmp    L3
L78:
  movsd  0x70(%rsp),%xmm3
  comisd %xmm0,%xmm3
  jbe    L160
  jmp    L255
L365:
  movsd  %xmm0,0x70(%rsp)
  jmp    L454
L329:
  movapd %xmm3,%xmm0
  call   <sqrt@plt>
  jmp    L265
L190:
  call   <sqrt@plt>
  jmp    L265
```

tool_calls: name: unpack_data
arguments: data_tag: D48
data_type: byte[8]
name: unpack_data
arguments: data_tag: D27
data_type: byte[8]
name: unpack_data
arguments: data_tag: D7
data_type: byte[8]
name: unpack_data
arguments: data_tag: D3
data_type: f32[2]

tool: {"D48": [0x40,0xeb,0xd6,0x89,0x33,0xfa,0x60,0x3e]}

tool: {"D27": [0x8a,0x33,0xfa,0x10,0x00,0x00,0xf0,0x3f]}

tool: {"D7": [0x40,0xeb,0xd6,0x89,0x33,0xfa,0x70,0x3e]}

tool: {"D3": [0.0,1.875]}

assistant: ```c
double modelhess(double *A, int N, double *dx, double *L) {
  double *U22;
  double sqrteps, maxdiag, mindiag, maxposdiag, u;
  double maxoffdiag, maxinp, maxadd;
  double maxev, minev, offrow, sdd;
  int step, i, j, k;
  sqrteps = sqrt((double)1e-15);
  U22 = (double *)malloc(sizeof(double) * N * N);
  for (i = 0; i < N; ++i) {
    step = i * N;
    for (j = 0; j < N; ++j) {
      A[step + j] /= (dx[i] * dx[j]);
    }
  }
  for (i = 0; i < N; ++i) {
    U22[i] = A[i + i * N];
  }
  maxdiag = array_max(U22, N);
  mindiag = array_min(U22, N);
  maxposdiag = 0.0;
  if (maxdiag > maxposdiag) {
    maxposdiag = maxdiag;
  }
  for (i = 0; i < N; ++i) {
    U22[i] = 0.0;
  }
  u = 0.0;
  if (mindiag <= sqrteps * maxposdiag) {
    u = 2 * (maxposdiag - mindiag) * sqrteps - mindiag;
    maxdiag += u;
  }
  k = 0;
  for (i = 0; i < N; ++i) {
    for (j = 0; j < N; ++j) {
      if (j > i) {
        U22[k] = A[i * N + j];
        k++;
      }
    }
  }
  maxoffdiag = array_max_abs(U22, k);
  if (maxoffdiag * (1 + 2 * sqrteps) > maxdiag) {
    u += (maxoffdiag - maxdiag) + 2 * sqrteps * maxoffdiag;
    maxdiag = maxoffdiag * (1 + 2 * sqrteps);
  }
  if (maxdiag == 0) {
    u = 1;
    maxdiag = 1;
  }
  if (u > 0) {
    for (i = 0; i < N; ++i) {
      A[i * N + i] += u;
    }
  }
  if (maxdiag > maxoffdiag / N) {
    maxinp = sqrt(maxdiag);
  } else {
    maxinp = sqrt(maxoffdiag / N);
  }
  maxadd = cholmod(A, N, L, maxinp);
  if (maxadd > 0) {
    maxev = minev = A[0];
    for (i = 0; i < N; ++i) {
      offrow = 0.0;
      step = i * N;
      for (j = 0; j < i; ++j) {
        offrow += fabs(A[step + j]);
      }
      for (j = i + 1; j < N; ++j) {
        offrow += fabs(A[step + j]);
      }
      if (maxev < A[step + i] + offrow) {
        maxev = A[step + i] + offrow;
      }
      if (minev > A[step + i] - offrow) {
        minev = A[step + i] - offrow;
      }
    }
    sdd = (maxev - minev) * sqrteps - minev;
    if (sdd < 0) {
      sdd = 0;
    }
    if (maxadd > sdd) {
      u = sdd;
    } else {
      u = maxadd;
    }
    for (i = 0; i < N; ++i) {
      A[i * N + i] += u;
    }
  }
  maxadd = cholmod(A, N, L, 0.0);
  for (i = 0; i < N; ++i) {
    step = i * N;
    for (j = 0; j < N; ++j) {
      A[step + j] *= (dx[i] * dx[j]);
    }
  }
  for (i = 0; i < N; ++i) {
    step = i * N;
    for (j = 0; j < i; ++j) {
      L[step + j] *= dx[i];
    }
  }
  free(U22);
  return maxadd;
}
```