user: What is the c source code of the assembly code below?

```asm
<calculateSubgridErrorNavierStokes2D_GLS_tau_sd>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %esi,0x38(%rsp)
  movsd  %xmm0,0x50(%rsp)
  test   %edi,%edi
  jle    L43
  mov    %edx,%ebx
  mov    %r8,%r13
  mov    %rcx,0x30(%rsp)
  imul   %edx,%esi
  mov    %esi,0x44(%rsp)
  lea    -0x1(%rdi),%edx
  lea    0x8(%rcx,%rdx,8),%rax
  mov    %rax,0x48(%rsp)
  movslq %ebx,%rax
  shl    $0x3,%rax
  mov    %rax,0x20(%rsp)
  lea    -0x1(%rbx),%eax
  mov    %rax,0x58(%rsp)
  movl   $0x0,0x40(%rsp)
  movl   $0x0,0x3c(%rsp)
  not    %rax
  shl    $0x3,%rax
  mov    %rax,0x28(%rsp)
  mov    %ebx,%r12d
  mov    %r9,%r14
  jmp    L98
L49:
  pxor   %xmm1,%xmm1
L65:
  sqrtsd %xmm1,%xmm1
L68:
  movapd %xmm1,%xmm0
  movsd  0x10(%rsp),%xmm5
  divsd  %xmm5,%xmm0
  mov    0xc0(%rsp),%rax
  movsd  %xmm0,(%rax,%rbp,1)
  movsd  0x0(%r13,%rbp,1),%xmm2
  andpd  D20(%rip),%xmm2
  movsd  0x8(%rsp),%xmm3
  mulsd  D27(%rip),%xmm3
  movsd  (%rsp),%xmm0
  addsd  %xmm0,%xmm0
  mulsd  %xmm1,%xmm0
  movapd %xmm5,%xmm4
  mulsd  %xmm5,%xmm4
  movapd %xmm3,%xmm1
  divsd  %xmm4,%xmm1
  movapd %xmm0,%xmm4
  divsd  %xmm5,%xmm4
  addsd  %xmm4,%xmm1
  addsd  %xmm2,%xmm1
  movsd  D1(%rip),%xmm4
  divsd  %xmm1,%xmm4
  mov    0xb0(%rsp),%rax
  movsd  %xmm4,(%rax,%rbp,1)
  mulsd  %xmm5,%xmm0
  addsd  %xmm3,%xmm0
  mulsd  %xmm5,%xmm2
  mulsd  %xmm5,%xmm2
  addsd  %xmm2,%xmm0
  mov    0xb8(%rsp),%rax
  movsd  %xmm0,(%rax,%rbp,1)
  mov    0x20(%rsp),%rax
  add    %rax,%r15
  add    %rax,%rbx
  add    $0x8,%rbp
  cmp    0x18(%rsp),%rbp
  je     L84
L41:
  movsd  (%r12,%rbp,1),%xmm6
  movsd  %xmm6,(%rsp)
  movsd  0x8(%r15),%xmm7
  movsd  %xmm7,0x8(%rsp)
  test   %r14d,%r14d
  jle    L49
  mov    0x28(%rsp),%rax
  add    %rbx,%rax
  pxor   %xmm1,%xmm1
L74:
  movsd  (%rax),%xmm0
  mulsd  %xmm0,%xmm0
  addsd  %xmm0,%xmm1
  add    $0x8,%rax
  cmp    %rbx,%rax
  jne    L74
  pxor   %xmm0,%xmm0
  ucomisd %xmm1,%xmm0
  jbe    L65
  movapd %xmm1,%xmm0
  call   <sqrt@plt>
  movapd %xmm0,%xmm1
  jmp    L68
L84:
  mov    %r12,%rax
  mov    %r14d,%r12d
  mov    %rax,%r14
L62:
  addq   $0x8,0x30(%rsp)
  mov    0x30(%rsp),%rax
  mov    0x44(%rsp),%edx
  add    %edx,0x3c(%rsp)
  mov    0x38(%rsp),%ecx
  add    %ecx,0x40(%rsp)
  cmp    0x48(%rsp),%rax
  je     L43
L98:
  mov    0x30(%rsp),%rax
  movsd  0x50(%rsp),%xmm6
  mulsd  (%rax),%xmm6
  movsd  %xmm6,0x10(%rsp)
  mov    0x38(%rsp),%edi
  test   %edi,%edi
  jle    L62
  movslq 0x3c(%rsp),%rax
  mov    0xa8(%rsp),%rdx
  lea    (%rdx,%rax,8),%r15
  add    0x58(%rsp),%rax
  mov    0xa0(%rsp),%rcx
  lea    0x8(%rcx,%rax,8),%rbx
  movslq 0x40(%rsp),%rdx
  lea    0x0(,%rdx,8),%rbp
  mov    %edi,%eax
  add    %rdx,%rax
  shl    $0x3,%rax
  mov    %rax,0x18(%rsp)
  mov    %r14,%rax
  mov    %r12d,%r14d
  mov    %rax,%r12
  jmp    L41
L43:
  add    $0x68,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: unpack_data
arguments: data_tag: D20
datatype: qword[2]
name: unpack_data
arguments: data_tag: D27
datatype: f64
name: unpack_data
arguments: data_tag: D1
datatype: f64

tool: {"D20": [0x7fffffffffffffff,0x0000000000000000]}

tool: D27: 4

tool: D1: 1

assistant: ```c
void calculateSubgridErrorNavierStokes2D_GLS_tau_sd(int nElements_global, int nQuadraturePoints_element, int nSpace, double hFactor, double *elementDiameter, double *dmt, double *dm, double *f, double *a, double *tau0, double *tau1, double *cfl) {
  int eN, k, nSpace2 = nSpace * nSpace, I;
  double h, oneByAbsdt, density, viscosity, Re_max = 0.0, CFL_max = 0.0, nrm_v;
  for (eN = 0; eN < nElements_global; eN++) {
    h = hFactor * elementDiameter[eN];
    for (k = 0; k < nQuadraturePoints_element; k++) {
      density = dm[eN * nQuadraturePoints_element + k];
      viscosity = a[eN * nQuadraturePoints_element * nSpace + k * nSpace + 1];
      nrm_v = 0.0;
      for (I = 0; I < nSpace; I++)
        nrm_v += f[eN * nQuadraturePoints_element * nSpace + k * nSpace + I] * f[eN * nQuadraturePoints_element * nSpace + k * nSpace + I];
      nrm_v = sqrt(nrm_v);
      Re_max = fmax(nrm_v * h / (viscosity / density), Re_max);
      CFL_max = fmax(nrm_v / h, CFL_max);
      cfl[eN * nQuadraturePoints_element + k] = nrm_v / h;
      if (0) {
        oneByAbsdt = 10.0 * (density * nrm_v / h);
      } else {
        oneByAbsdt = fabs(dmt[eN * nQuadraturePoints_element + k]);
      }
      tau0[eN * nQuadraturePoints_element + k] = 1.0 / (4.0 * viscosity / (h * h) + 2.0 * density * nrm_v / h + oneByAbsdt);
      tau1[eN * nQuadraturePoints_element + k] = 4.0 * viscosity + 2.0 * density * nrm_v * h + oneByAbsdt * h * h;
    }
  }
}
```