user: Translate the below assembly code into C programming language:

```asm
<svdbacksub>:
  endbr64
  push   %r15
  mov    %rcx,%r15
  push   %r14
  mov    %rsi,%r14
  push   %r13
  mov    %r8,%r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  mov    %rdx,%rbp
  push   %rbx
  sub    $0x78,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x68(%rsp)
  xor    %eax,%eax
  mov    0xb0(%rsp),%ebx
  cmp    $0xa,%ebx
  jg     L117
  test   %ebx,%ebx
  jle    L118
  lea    0x10(%rsp),%rcx
  mov    %rcx,%rdi
L34:
  xor    %edx,%edx
  pxor   %xmm3,%xmm3
  movslq %r9d,%r8
  jmp    L88
  nopl   0x0(%rax)
L143:
  movsd  %xmm1,(%rdi,%rdx,8)
  add    $0x1,%rdx
  cmp    %edx,%ebx
  jle    L175
L88:
  movsd  (%r14,%rdx,8),%xmm2
  lea    0x0(,%rdx,8),%rsi
  ucomisd %xmm3,%xmm2
  jp     L76
  movapd %xmm3,%xmm1
  je     L143
L76:
  test   %r9d,%r9d
  jle    L61
  xor    %eax,%eax
  movapd %xmm3,%xmm1
  cs nopw 0x0(%rax,%rax,1)
L40:
  mov    (%r12,%rax,8),%r10
  movsd  (%r10,%rsi,1),%xmm0
  mulsd  (%r15,%rax,8),%xmm0
  add    $0x1,%rax
  addsd  %xmm0,%xmm1
  cmp    %r8,%rax
  jne    L40
  divsd  %xmm2,%xmm1
L30:
  movsd  %xmm1,(%rdi,%rdx,8)
  add    $0x1,%rdx
  cmp    %edx,%ebx
  jg     L88
L175:
  test   %ebx,%ebx
  mov    $0x1,%r10d
  cmovg  %ebx,%r10d
  xor    %r8d,%r8d
  mov    %r10d,%eax
  mov    %r10d,%r9d
  shr    %eax
  and    $0xfffffffe,%r9d
  lea    -0x1(%rax),%esi
  add    $0x1,%rsi
  shl    $0x4,%rsi
  nopl   0x0(%rax)
L19:
  mov    0x0(%rbp,%r8,8),%rdx
  cmp    $0x1,%ebx
  jle    L99
  xor    %eax,%eax
  movapd %xmm3,%xmm1
  nopl   0x0(%rax)
L164:
  movupd (%rdi,%rax,1),%xmm0
  movupd (%rdx,%rax,1),%xmm4
  add    $0x10,%rax
  mulpd  %xmm4,%xmm0
  addsd  %xmm0,%xmm1
  unpckhpd %xmm0,%xmm0
  addsd  %xmm0,%xmm1
  cmp    %rax,%rsi
  jne    L164
  movslq %r9d,%rax
  cmp    %r10d,%r9d
  je     L162
L72:
  movsd  (%rdi,%rax,8),%xmm0
  mulsd  (%rdx,%rax,8),%xmm0
  addsd  %xmm0,%xmm1
L162:
  movsd  %xmm1,0x0(%r13,%r8,8)
  add    $0x1,%r8
  cmp    %r8d,%ebx
  jg     L19
  cmp    %rcx,%rdi
  je     L118
  lea    -0x1(%rbx),%edx
  xor    %esi,%esi
  call   <free_dvector@plt>
L118:
  mov    0x68(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L3
  add    $0x78,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L99:
  movapd %xmm3,%xmm1
  xor    %eax,%eax
  jmp    L72
L117:
  xor    %edi,%edi
  lea    -0x1(%rbx),%esi
  mov    %r9d,0xc(%rsp)
  call   <dvector@plt>
  mov    0xc(%rsp),%r9d
  lea    0x10(%rsp),%rcx
  mov    %rax,%rdi
  jmp    L34
L61:
  movapd %xmm3,%xmm1
  divsd  %xmm2,%xmm1
  jmp    L30
L3:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int svdbacksub(double **u, double *w, double **v, double b[], double x[], int m, int n) {
  int i, j;
  double *tmp, TMP[10];
  if (n <= 10)
    tmp = TMP;
  else
    tmp = dvector(0, n - 1);
  for (j = 0; j < n; j++) {
    if (w[j]) {
      double s;
      for (s = 0.0, i = 0; i < m; i++)
        s += b[i] * u[i][j];
      s /= w[j];
      tmp[j] = s;
    } else {
      tmp[j] = 0.0;
    }
  }
  for (j = 0; j < n; j++) {
    double s;
    for (s = 0.0, i = 0; i < n; i++)
      s += v[j][i] * tmp[i];
    x[j] = s;
  }
  if (tmp != TMP)
    free_dvector(tmp, 0, n - 1);
  return 0;
}
```