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

```asm
<inv_dct8_1d_internal_c>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %esi,-0x4c(%rbp)
  mov    %edx,-0x50(%rbp)
  mov    %ecx,-0x54(%rbp)
  mov    %r8d,-0x58(%rbp)
  cmpl   $0x0,-0x4c(%rbp)
  setg   %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  mov    -0x4c(%rbp),%eax
  lea    (%rax,%rax,1),%esi
  mov    -0x58(%rbp),%edi
  mov    -0x54(%rbp),%ecx
  mov    -0x50(%rbp),%edx
  mov    -0x48(%rbp),%rax
  mov    %edi,%r8d
  mov    %rax,%rdi
  call   <inv_dct4_1d_internal_c@plt>
  mov    -0x4c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x2c(%rbp)
  cmpl   $0x0,-0x58(%rbp)
  je     L15
  mov    -0x30(%rbp),%eax
  imul   $0x31f,%eax,%eax
  add    $0x800,%eax
  sar    $0xc,%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x2c(%rbp),%eax
  imul   $0xfffff71c,%eax,%eax
  add    $0x800,%eax
  sar    $0xc,%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x2c(%rbp),%eax
  imul   $0xd4e,%eax,%eax
  add    $0x800,%eax
  sar    $0xc,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x30(%rbp),%eax
  imul   $0xfb1,%eax,%eax
  add    $0x800,%eax
  sar    $0xc,%eax
  mov    %eax,-0x34(%rbp)
  jmp    L1
L15:
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  shl    $0x3,%eax
  sub    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x30(%rbp),%eax
  imul   $0x31f,%eax,%edx
  mov    -0x24(%rbp),%eax
  imul   $0x4f,%eax,%eax
  add    %edx,%eax
  add    $0x800,%eax
  sar    $0xc,%eax
  sub    -0x24(%rbp),%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x28(%rbp),%eax
  imul   $0x6a7,%eax,%edx
  mov    -0x2c(%rbp),%eax
  imul   $0xfffffb8e,%eax,%eax
  add    %edx,%eax
  add    $0x400,%eax
  sar    $0xb,%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x28(%rbp),%eax
  imul   $0x472,%eax,%edx
  mov    -0x2c(%rbp),%eax
  imul   $0x6a7,%eax,%eax
  add    %edx,%eax
  add    $0x400,%eax
  sar    $0xb,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x30(%rbp),%eax
  imul   $0xffffffb1,%eax,%edx
  mov    -0x24(%rbp),%eax
  imul   $0x31f,%eax,%eax
  add    %edx,%eax
  add    $0x800,%eax
  sar    $0xc,%eax
  mov    %eax,%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x34(%rbp)
L1:
  mov    -0x40(%rbp),%edx
  mov    -0x3c(%rbp),%eax
  lea    (%rdx,%rax,1),%ecx
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%eax
  mov    %eax,%esi
  mov    %ecx,%edi
  call   <iclip@plt>
  mov    %eax,-0x20(%rbp)
  mov    -0x40(%rbp),%eax
  sub    -0x3c(%rbp),%eax
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%ecx
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <iclip@plt>
  mov    %eax,-0x3c(%rbp)
  mov    -0x34(%rbp),%edx
  mov    -0x38(%rbp),%eax
  lea    (%rdx,%rax,1),%ecx
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%eax
  mov    %eax,%esi
  mov    %ecx,%edi
  call   <iclip@plt>
  mov    %eax,-0x1c(%rbp)
  mov    -0x34(%rbp),%eax
  sub    -0x38(%rbp),%eax
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%ecx
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <iclip@plt>
  mov    %eax,-0x38(%rbp)
  mov    -0x38(%rbp),%eax
  sub    -0x3c(%rbp),%eax
  imul   $0xb5,%eax,%eax
  sub    $0xffffff80,%eax
  sar    $0x8,%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x38(%rbp),%edx
  mov    -0x3c(%rbp),%eax
  add    %edx,%eax
  imul   $0xb5,%eax,%eax
  sub    $0xffffff80,%eax
  sar    $0x8,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x48(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x4c(%rbp),%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x4c(%rbp),%eax
  shl    $0x2,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x10(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  lea    (%rdx,%rax,1),%ecx
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%eax
  mov    %eax,%esi
  mov    %ecx,%edi
  call   <iclip@plt>
  mov    %eax,%edx
  mov    -0x48(%rbp),%rax
  mov    %edx,(%rax)
  mov    -0xc(%rbp),%edx
  mov    -0x14(%rbp),%eax
  lea    (%rdx,%rax,1),%ecx
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%eax
  mov    %eax,%esi
  mov    %ecx,%edi
  call   <iclip@plt>
  mov    %rax,%rdx
  mov    -0x4c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  mov    %edx,(%rax)
  mov    -0x8(%rbp),%edx
  mov    -0x18(%rbp),%eax
  lea    (%rdx,%rax,1),%ecx
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%eax
  mov    %eax,%esi
  mov    %ecx,%edi
  call   <iclip@plt>
  mov    %rax,%rdx
  mov    -0x4c(%rbp),%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  mov    %edx,(%rax)
  mov    -0x4(%rbp),%edx
  mov    -0x20(%rbp),%eax
  lea    (%rdx,%rax,1),%ecx
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%eax
  mov    %eax,%esi
  mov    %ecx,%edi
  call   <iclip@plt>
  mov    %rax,%rcx
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x4(%rbp),%eax
  sub    -0x20(%rbp),%eax
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%ecx
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <iclip@plt>
  mov    %rax,%rdx
  mov    -0x4c(%rbp),%eax
  shl    $0x2,%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  mov    %edx,(%rax)
  mov    -0x8(%rbp),%eax
  sub    -0x18(%rbp),%eax
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%ecx
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <iclip@plt>
  mov    %rax,%rcx
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0xc(%rbp),%eax
  sub    -0x14(%rbp),%eax
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%ecx
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <iclip@plt>
  mov    %rax,%rcx
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x10(%rbp),%eax
  sub    -0x1c(%rbp),%eax
  mov    -0x54(%rbp),%edx
  mov    -0x50(%rbp),%ecx
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <iclip@plt>
  mov    %rax,%rcx
  mov    -0x4c(%rbp),%edx
  mov    %edx,%eax
  shl    $0x3,%eax
  sub    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %edx,(%rax)
  nop
  leave
  ret
```

assistant: ```c
__attribute__((no)) void inv_dct8_1d_internal_c(int32_t *const c, const ptrdiff_t stride, const int min, const int max, const int tx64) {
  assert(stride > 0);
  inv_dct4_1d_internal_c(c, stride << 1, min, max, tx64);
  const int in1 = c[1 * stride], in3 = c[3 * stride];
  int t4a, t5a, t6a, t7a;
  if (tx64) {
    t4a = (in1 * 799 + 2048) >> 12;
    t5a = (in3 * -2276 + 2048) >> 12;
    t6a = (in3 * 3406 + 2048) >> 12;
    t7a = (in1 * 4017 + 2048) >> 12;
  } else {
    const int in5 = c[5 * stride], in7 = c[7 * stride];
    t4a = ((in1 * 799 - in7 * (4017 - 4096) + 2048) >> 12) - in7;
    t5a = (in5 * 1703 - in3 * 1138 + 1024) >> 11;
    t6a = (in5 * 1138 + in3 * 1703 + 1024) >> 11;
    t7a = ((in1 * (4017 - 4096) + in7 * 799 + 2048) >> 12) + in1;
  }
  const int t4 = iclip(t4a + t5a, min, max);
  t5a = iclip(t4a - t5a, min, max);
  const int t7 = iclip(t7a + t6a, min, max);
  t6a = iclip(t7a - t6a, min, max);
  const int t5 = ((t6a - t5a) * 181 + 128) >> 8;
  const int t6 = ((t6a + t5a) * 181 + 128) >> 8;
  const int t0 = c[0 * stride];
  const int t1 = c[2 * stride];
  const int t2 = c[4 * stride];
  const int t3 = c[6 * stride];
  c[0 * stride] = iclip(t0 + t7, min, max);
  c[1 * stride] = iclip(t1 + t6, min, max);
  c[2 * stride] = iclip(t2 + t5, min, max);
  c[3 * stride] = iclip(t3 + t4, min, max);
  c[4 * stride] = iclip(t3 - t4, min, max);
  c[5 * stride] = iclip(t2 - t5, min, max);
  c[6 * stride] = iclip(t1 - t6, min, max);
  c[7 * stride] = iclip(t0 - t7, min, max);
}
```