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

```asm
<yuv420raw_to_yuv420p>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %rdi,0x40(%rsp)
  mov    %rsi,0x10(%rsp)
  mov    %edx,%r15d
  mov    %edx,%r14d
  imul   %ecx,%r14d
  mov    %edx,%r12d
  shr    $0x1f,%r12d
  add    %edx,%r12d
  sar    %r12d
  mov    %r14d,%eax
  add    %rsi,%rax
  mov    %rax,%rdx
  lea    -0x1(%rcx),%eax
  mov    %eax,0x18(%rsp)
  test   %eax,%eax
  jle    L1
  shr    $0x2,%r14d
  mov    %r14d,%r14d
  lea    0x0(,%r12,8),%eax
  mov    %eax,%eax
  mov    %rax,0x28(%rsp)
  lea    -0x2(%r15),%eax
  mov    %eax,0x48(%rsp)
  shr    $0x4,%eax
  add    $0x1,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,8),%rcx
  mov    %rcx,0x30(%rsp)
  lea    (%rax,%rax,2),%rax
  shl    $0x7,%rax
  mov    %rax,0x38(%rsp)
  mov    %rdi,0x20(%rsp)
  movl   $0x0,0x8(%rsp)
  lea    -0x1(%r15),%eax
  mov    %eax,0x1c(%rsp)
  mov    %r15d,0x4c(%rsp)
  mov    %rdx,%r15
  jmp    L85
L34:
  mov    %r12d,%edx
  mov    %rbx,%rsi
  mov    %rbp,%rdi
  call   <make_8x8@plt>
  lea    (%rbx,%r14,1),%rsi
  lea    0x40(%rbp),%rdi
  mov    %r12d,%edx
  call   <make_8x8@plt>
  add    $0x180,%rbp
  add    $0x8,%rbx
  cmp    %rbx,%r13
  jne    L34
  mov    0x38(%rsp),%rcx
  add    %rcx,0x20(%rsp)
L106:
  add    0x28(%rsp),%r15
  addl   $0x10,0x8(%rsp)
  mov    0x8(%rsp),%eax
  cmp    0x18(%rsp),%eax
  jge    L36
L85:
  mov    0x30(%rsp),%rax
  lea    (%r15,%rax,1),%r13
  mov    %r15,%rbx
  mov    0x20(%rsp),%rbp
  cmpl   $0x0,0x1c(%rsp)
  jg     L34
  jmp    L106
L64:
  add    $0xc0,%r12
  mov    $0x0,%ebp
L62:
  cmp    %rbx,%r13
  je     L110
L40:
  mov    %r15d,%edx
  mov    %rbx,%rsi
  mov    %r12,%rdi
  call   <make_8x8@plt>
  add    $0x8,%rbx
  add    $0x1,%ebp
  cmp    $0x3,%ebp
  jg     L64
  add    $0x40,%r12
  jmp    L62
L110:
  mov    0x8(%rsp),%rcx
  add    %rcx,0x10(%rsp)
  add    $0x8,%r14d
  cmp    0x18(%rsp),%r14d
  jge    L1
L17:
  mov    0x10(%rsp),%rbx
  mov    %rbx,%r13
  add    0x20(%rsp),%r13
  cmpl   $0x0,0x1c(%rsp)
  jg     L40
  jmp    L110
L36:
  mov    0x4c(%rsp),%r15d
  mov    0x40(%rsp),%r12
  sub    $0xffffffffffffff80,%r12
  lea    0x0(,%r15,8),%eax
  cltq
  mov    %rax,0x8(%rsp)
  mov    0x48(%rsp),%eax
  shr    $0x3,%eax
  add    $0x1,%eax
  mov    %eax,%eax
  shl    $0x3,%rax
  mov    %rax,0x20(%rsp)
  mov    $0x0,%r14d
  mov    $0x0,%ebp
  jmp    L17
L1:
  add    $0x58,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void yuv420raw_to_yuv420p(unsigned char *pIn0, unsigned char *pOut0, int width, int height) {
  int k, x, y;
  unsigned char *pIn, *pOut, *pOutLine;
  const unsigned int a = width * height;
  const unsigned int w = width / 2;
  pIn = pIn0;
  pOutLine = pOut0 + a;
  for (y = 0; y < height - 1; y += 16) {
    pOut = pOutLine;
    for (x = 0; x < width - 1; x += 16) {
      make_8x8(pIn, pOut, w);
      make_8x8(pIn + 64, pOut + a / 4, w);
      pIn += 384;
      pOut += 8;
    }
    pOutLine += 8 * w;
  }
  pIn = pIn0 + 128;
  pOutLine = pOut0;
  k = 0;
  for (y = 0; y < height - 1; y += 8) {
    pOut = pOutLine;
    for (x = 0; x < width - 1; x += 8) {
      make_8x8(pIn, pOut, width);
      pIn += 64;
      pOut += 8;
      if ((++k) > 3) {
        k = 0;
        pIn += 128;
      }
    }
    pOutLine += 8 * width;
  }
}
```