user: What would the C source look like for the assembly code provided here:

```asm
<rbcholu>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %rdi,0x28(%rsp)
  mov    %esi,0x1c(%rsp)
  mov    %edx,0x58(%rsp)
  mov    %rcx,0x40(%rsp)
  mov    %r8,0x8(%rsp)
  cmp    $0x20,%esi
  jg     L125
  call   <rcholu@plt>
L87:
  add    $0x68,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L125:
  mov    0x1c(%rsp),%r14d
  lea    -0x20(%r14),%r12d
  mov    $0x100,%edi
  call   <malloc@plt>
  mov    %rax,%rbp
  mov    $0x100,%edi
  call   <malloc@plt>
  mov    %rax,0x10(%rsp)
  movslq %r12d,%rax
  mov    %rax,0x48(%rsp)
  mov    %r12d,%ebx
  shl    $0x8,%ebx
  mov    %ebx,%edi
  call   <malloc@plt>
  mov    %rax,0x38(%rsp)
  mov    %ebx,%edi
  call   <malloc@plt>
  mov    %rax,0x50(%rsp)
  mov    0x40(%rsp),%rcx
  mov    0x58(%rsp),%ebx
  mov    %ebx,%edx
  mov    $0x20,%esi
  mov    0x28(%rsp),%r15
  mov    %r15,%rdi
  call   <rcholu@plt>
  mov    0x8(%rsp),%rdi
  mov    %rdi,%r13
  movslq %ebx,%rbx
  shl    $0x3,%rbx
  lea    -0x1(%r14),%eax
  lea    0x8(%r15,%rax,8),%rcx
  mov    $0x0,%esi
  mov    %r14d,%r8d
  neg    %r8
  shl    $0x3,%r8
  jmp    L9
L7:
  add    $0x1,%esi
  add    $0x8,%rdi
  add    %rbx,%rcx
  cmp    $0x20,%esi
  je     L6
L9:
  lea    (%r8,%rcx,1),%rax
  mov    %rdi,%rdx
L95:
  movsd  (%rax),%xmm0
  movsd  %xmm0,(%rdx)
  add    $0x8,%rax
  add    $0x100,%rdx
  cmp    %rcx,%rax
  jne    L95
  jmp    L7
L6:
  mov    0x28(%rsp),%rax
  lea    0x100(%rax),%rsi
  mov    0x38(%rsp),%r9
  sub    %rbp,%r9
  mov    0x8(%rsp),%r8
  mov    0x10(%rsp),%rdi
  sub    %rdi,%r8
  mov    $0x20,%ecx
  lea    0x100(%rdi),%r15
  mov    %rbp,%r14
  sub    %rdi,%r14
  mov    $0x100,%eax
  sub    %rbp,%rax
  mov    %rax,0x30(%rsp)
  lea    -0x8(%rdi),%r10
  sub    %rbp,%r10
  lea    0x100(%rbp),%r11
  mov    %r12d,0x5c(%rsp)
  mov    %r13,0x20(%rsp)
  mov    %ecx,%r12d
  mov    %rsi,%r13
  jmp    L69
L34:
  pxor   %xmm1,%xmm1
L113:
  add    $0x108,%rdi
  add    $0x100,%rcx
  add    $0x8,%rdx
L49:
  movsd  (%r10,%rdx,1),%xmm0
  subsd  %xmm1,%xmm0
  divsd  (%rdi),%xmm0
  movsd  %xmm0,-0x8(%rdx)
  add    $0x1,%esi
  cmp    $0x20,%esi
  je     L97
  test   %esi,%esi
  jle    L34
  mov    %rbp,%rax
  pxor   %xmm1,%xmm1
L166:
  movsd  (%rcx,%rax,1),%xmm0
  mulsd  (%rax),%xmm0
  addsd  %xmm0,%xmm1
  add    $0x8,%rax
  cmp    %rdx,%rax
  jne    L166
  jmp    L113
L97:
  mov    %r13,%rdx
  mov    %rbp,%rax
L118:
  movsd  (%rax),%xmm0
  movsd  %xmm0,(%rdx)
  movsd  %xmm0,(%rax,%r9,1)
  add    $0x8,%rax
  add    %rbx,%rdx
  cmp    %r11,%rax
  jne    L118
  add    $0x1,%r12d
  add    $0x8,%r13
  add    $0x100,%r9
  add    $0x100,%r8
  cmp    0x1c(%rsp),%r12d
  je     L48
L69:
  mov    0x10(%rsp),%rax
L29:
  movsd  0x2000(%r8,%rax,1),%xmm0
  movsd  %xmm0,(%rax)
  movq   $0x0,(%r14,%rax,1)
  add    $0x8,%rax
  cmp    %r15,%rax
  jne    L29
  mov    0x8(%rsp),%rcx
  add    0x30(%rsp),%rcx
  lea    0x8(%rbp),%rdx
  mov    0x20(%rsp),%rdi
  mov    $0x0,%esi
  pxor   %xmm1,%xmm1
  jmp    L49
L48:
  mov    0x5c(%rsp),%r12d
  mov    0x20(%rsp),%r13
  mov    0x50(%rsp),%r14
  mov    %r14,%rcx
  mov    $0x20,%edx
  mov    %r12d,%esi
  mov    0x38(%rsp),%r15
  mov    %r15,%rdi
  call   <mtranspose@plt>
  mov    %r12d,%r9d
  mov    $0x20,%r8d
  mov    %r12d,%ecx
  mov    0x8(%rsp),%rdx
  mov    %r14,%rsi
  mov    %r15,%rdi
  call   <mmult@plt>
  mov    %r15,%rdi
  call   <free@plt>
  mov    %r14,%rdi
  call   <free@plt>
  mov    0x10(%rsp),%rdi
  call   <free@plt>
  mov    %rbp,%rdi
  call   <free@plt>
  mov    0x58(%rsp),%eax
  add    $0x1,%eax
  shl    $0x5,%eax
  cltq
  mov    0x28(%rsp),%rdi
  lea    (%rdi,%rax,8),%rdi
  mov    %rdi,%rdx
  mov    0x48(%rsp),%rsi
  shl    $0x3,%rsi
  mov    0x1c(%rsp),%eax
  lea    -0x20(%rax),%r8d
  mov    $0x0,%ecx
L24:
  cmp    %ecx,%r12d
  jle    L66
  mov    %rcx,%rax
L70:
  movsd  (%rdx,%rax,8),%xmm0
  subsd  0x0(%r13,%rax,8),%xmm0
  movsd  %xmm0,(%rdx,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%r12d
  jg     L70
L66:
  add    $0x1,%rcx
  add    %rbx,%rdx
  add    %rsi,%r13
  cmp    %r8,%rcx
  jne    L24
  mov    0x8(%rsp),%r8
  mov    0x40(%rsp),%rcx
  mov    0x58(%rsp),%edx
  mov    %r12d,%esi
  call   <rbcholu>
  jmp    L87
```

assistant: ```c
int rbcholu(double *A, int N, int stride, double *UB, double *UT) {
  int bs, bb, i, j, Nb, t, k, u, v, w, sc;
  double *b, *x, *U12, *U12T;
  double sum;
  bs = (int)32;
  bb = bs * bs;
  if (N <= 32) {
    sc = rcholu(A, N, stride, UB);
    if (sc == -1) {
      return -1;
    }
  } else {
    Nb = N - bs;
    x = (double *)malloc(sizeof(double) * bs);
    b = (double *)malloc(sizeof(double) * bs);
    U12T = (double *)malloc(sizeof(double) * Nb * bs);
    U12 = (double *)malloc(sizeof(double) * Nb * bs);
    rcholu(A, bs, stride, UB);
    for (i = 0; i < bs; ++i) {
      t = i * stride;
      u = 0;
      for (j = 0; j < N; ++j) {
        UT[u + i] = A[j + t];
        u += bs;
      }
    }
    for (k = 0; k < Nb; ++k) {
      u = k * bs;
      for (i = 0; i < bs; ++i) {
        b[i] = UT[bb + u + i];
        x[i] = 0.;
      }
      for (i = 0; i < bs; ++i) {
        t = i * bs;
        sum = 0;
        for (j = 0; j < i; ++j) {
          sum += UT[t + j] * x[j];
        }
        x[i] = (b[i] - sum) / UT[t + i];
      }
      v = bs + k;
      for (i = 0; i < bs; ++i) {
        A[v] = x[i];
        U12T[u + i] = x[i];
        v += stride;
      }
    }
    mtranspose(U12T, Nb, bs, U12);
    mmult(U12T, U12, UT, Nb, bs, Nb);
    free(U12T);
    free(U12);
    free(b);
    free(x);
    for (i = 0; i < Nb; ++i) {
      u = bs * stride + bs + i * stride;
      w = i * Nb;
      for (j = i; j < Nb; j++) {
        A[j + u] -= UT[j + w];
      }
    }
    sc = rbcholu(A + bs * stride + bs, Nb, stride, UB, UT);
    if (sc == -1) {
      return -1;
    }
  }
  return sc;
}
```