user: Demonstrate the C code that generates the assembly output below:

```asm
<Patch_GetFlatness>:
  endbr64
  mulss  %xmm0,%xmm0
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  movq   $0x0,(%rcx)
  cmpl   $0x1,0x4(%rdx)
  movss  %xmm0,0x18(%rsp)
  jle    L13
  movl   $0x0,0x1c(%rsp)
  mov    (%rdx),%r12d
  mov    %rdi,%rbx
  mov    %esi,%ebp
  mov    %rdx,%r13
  mov    %rcx,%r15
  nopl   0x0(%rax,%rax,1)
L12:
  xor    %r14d,%r14d
  cmp    $0x1,%r12d
  jle    L28
  nopl   (%rax)
L37:
  imul   0x1c(%rsp),%r12d
  movss  0x18(%rsp),%xmm0
  add    %r14d,%r12d
  lea    0x2(%r12),%eax
  imul   %ebp,%eax
  movslq %eax,%rdx
  sub    %ebp,%eax
  lea    (%rbx,%rdx,4),%r8
  movslq %eax,%rdx
  sub    %ebp,%eax
  cltq
  lea    (%rbx,%rdx,4),%r9
  mov    %r8,%rdx
  mov    %r8,0x10(%rsp)
  lea    (%rbx,%rax,4),%r10
  mov    %r9,%rsi
  mov    %r9,0x8(%rsp)
  mov    %r10,%rdi
  mov    %r10,(%rsp)
  call   <Patch_FlatnessTest@plt>
  movss  0x18(%rsp),%xmm0
  mov    %eax,%r11d
  mov    (%r15),%eax
  cmp    %r11d,%eax
  cmovl  %r11d,%eax
  mov    %eax,(%r15)
  mov    0x0(%r13),%eax
  add    %r12d,%eax
  add    $0x2,%eax
  imul   %ebp,%eax
  mov    %eax,%edx
  cltq
  sub    %ebp,%edx
  lea    (%rbx,%rax,4),%r11
  movslq %edx,%rax
  sub    %ebp,%edx
  movslq %edx,%rdx
  lea    (%rbx,%rax,4),%rsi
  lea    (%rbx,%rdx,4),%rdi
  mov    %r11,%rdx
  call   <Patch_FlatnessTest@plt>
  movss  0x18(%rsp),%xmm0
  mov    %eax,%r11d
  mov    (%r15),%eax
  cmp    %r11d,%eax
  cmovl  %r11d,%eax
  mov    %eax,(%r15)
  mov    0x0(%r13),%eax
  lea    0x2(%r12,%rax,2),%edx
  imul   %ebp,%edx
  mov    %edx,%eax
  movslq %edx,%rdx
  sub    %ebp,%eax
  lea    (%rbx,%rdx,4),%rdx
  movslq %eax,%rsi
  sub    %ebp,%eax
  cltq
  lea    (%rbx,%rsi,4),%rsi
  lea    (%rbx,%rax,4),%rdi
  call   <Patch_FlatnessTest@plt>
  mov    (%rsp),%rdi
  movss  0x18(%rsp),%xmm0
  mov    %eax,%r11d
  mov    (%r15),%eax
  cmp    %r11d,%eax
  cmovl  %r11d,%eax
  mov    %eax,(%r15)
  mov    0x0(%r13),%esi
  lea    (%r12,%rsi,2),%eax
  mov    %eax,%edx
  sub    %esi,%eax
  imul   %ebp,%edx
  imul   %ebp,%eax
  movslq %edx,%rdx
  cltq
  lea    (%rbx,%rdx,4),%rdx
  lea    (%rbx,%rax,4),%rsi
  call   <Patch_FlatnessTest@plt>
  mov    0x8(%rsp),%rdi
  movss  0x18(%rsp),%xmm0
  mov    %eax,%r10d
  mov    0x4(%r15),%eax
  cmp    %r10d,%eax
  cmovl  %r10d,%eax
  mov    %eax,0x4(%r15)
  mov    0x0(%r13),%esi
  lea    (%r12,%rsi,2),%eax
  lea    0x1(%rax),%edx
  sub    %esi,%eax
  add    $0x1,%eax
  imul   %ebp,%edx
  imul   %ebp,%eax
  movslq %edx,%rdx
  cltq
  lea    (%rbx,%rdx,4),%rdx
  lea    (%rbx,%rax,4),%rsi
  call   <Patch_FlatnessTest@plt>
  mov    0x10(%rsp),%rdi
  movss  0x18(%rsp),%xmm0
  mov    %eax,%r9d
  mov    0x4(%r15),%eax
  cmp    %r9d,%eax
  cmovl  %r9d,%eax
  mov    %eax,0x4(%r15)
  mov    0x0(%r13),%esi
  lea    (%r12,%rsi,2),%eax
  lea    0x2(%rax),%edx
  sub    %esi,%eax
  add    $0x2,%eax
  imul   %ebp,%edx
  imul   %ebp,%eax
  movslq %edx,%rdx
  cltq
  lea    (%rbx,%rdx,4),%rdx
  lea    (%rbx,%rax,4),%rsi
  call   <Patch_FlatnessTest@plt>
  mov    %eax,%r8d
  mov    0x4(%r15),%eax
  cmp    %r8d,%eax
  cmovl  %r8d,%eax
  add    $0x2,%r14d
  mov    %eax,0x4(%r15)
  mov    0x0(%r13),%r12d
  lea    -0x1(%r12),%eax
  cmp    %r14d,%eax
  jg     L37
L28:
  mov    0x4(%r13),%eax
  addl   $0x2,0x1c(%rsp)
  mov    0x1c(%rsp),%ecx
  sub    $0x1,%eax
  cmp    %ecx,%eax
  jg     L12
L13:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void Patch_GetFlatness(float maxflat, const float *points, int comp, const int *patch_cp, int *flat) {
  int i, p, u, v;
  float maxflat2 = maxflat * maxflat;
  flat[0] = flat[1] = 0;
  for (v = 0; v < patch_cp[1] - 1; v += 2) {
    for (u = 0; u < patch_cp[0] - 1; u += 2) {
      p = v * patch_cp[0] + u;
      i = Patch_FlatnessTest(maxflat2, &points[p * comp], &points[(p + 1) * comp], &points[(p + 2) * comp]);
      flat[0] = ((flat[0]) > (i) ? (flat[0]) : (i));
      i = Patch_FlatnessTest(maxflat2, &points[(p + patch_cp[0]) * comp], &points[(p + patch_cp[0] + 1) * comp], &points[(p + patch_cp[0] + 2) * comp]);
      flat[0] = ((flat[0]) > (i) ? (flat[0]) : (i));
      i = Patch_FlatnessTest(maxflat2, &points[(p + 2 * patch_cp[0]) * comp], &points[(p + 2 * patch_cp[0] + 1) * comp], &points[(p + 2 * patch_cp[0] + 2) * comp]);
      flat[0] = ((flat[0]) > (i) ? (flat[0]) : (i));
      i = Patch_FlatnessTest(maxflat2, &points[p * comp], &points[(p + patch_cp[0]) * comp], &points[(p + 2 * patch_cp[0]) * comp]);
      flat[1] = ((flat[1]) > (i) ? (flat[1]) : (i));
      i = Patch_FlatnessTest(maxflat2, &points[(p + 1) * comp], &points[(p + patch_cp[0] + 1) * comp], &points[(p + 2 * patch_cp[0] + 1) * comp]);
      flat[1] = ((flat[1]) > (i) ? (flat[1]) : (i));
      i = Patch_FlatnessTest(maxflat2, &points[(p + 2) * comp], &points[(p + patch_cp[0] + 2) * comp], &points[(p + 2 * patch_cp[0] + 2) * comp]);
      flat[1] = ((flat[1]) > (i) ? (flat[1]) : (i));
    }
  }
}
```