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

```asm
<BTIC2D_TransWHT_Stride8>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x88(%rbp)
  mov    %rsi,-0x90(%rbp)
  mov    %edx,-0x94(%rbp)
  mov    %ecx,-0x98(%rbp)
  mov    -0x88(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x80(%rbp)
  mov    -0x94(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x7c(%rbp)
  mov    -0x94(%rbp),%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x78(%rbp)
  mov    -0x94(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x74(%rbp)
  mov    -0x94(%rbp),%eax
  shl    $0x2,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x70(%rbp)
  mov    -0x94(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x6c(%rbp)
  mov    -0x94(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x68(%rbp)
  mov    -0x94(%rbp),%edx
  mov    %edx,%eax
  shl    $0x3,%eax
  sub    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x64(%rbp)
  mov    -0x80(%rbp),%edx
  mov    -0x70(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x60(%rbp)
  mov    -0x7c(%rbp),%edx
  mov    -0x6c(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x5c(%rbp)
  mov    -0x78(%rbp),%edx
  mov    -0x68(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x58(%rbp)
  mov    -0x74(%rbp),%edx
  mov    -0x64(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x54(%rbp)
  mov    -0x60(%rbp),%eax
  sar    %eax
  sub    -0x70(%rbp),%eax
  mov    %eax,-0x50(%rbp)
  mov    -0x5c(%rbp),%eax
  sar    %eax
  sub    -0x6c(%rbp),%eax
  mov    %eax,-0x4c(%rbp)
  mov    -0x58(%rbp),%eax
  sar    %eax
  sub    -0x68(%rbp),%eax
  mov    %eax,-0x48(%rbp)
  mov    -0x54(%rbp),%eax
  sar    %eax
  sub    -0x64(%rbp),%eax
  mov    %eax,-0x44(%rbp)
  mov    -0x60(%rbp),%edx
  mov    -0x58(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x5c(%rbp),%edx
  mov    -0x54(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x40(%rbp),%eax
  sar    %eax
  sub    -0x58(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x3c(%rbp),%eax
  sar    %eax
  sub    -0x54(%rbp),%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x50(%rbp),%edx
  mov    -0x48(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x4c(%rbp),%edx
  mov    -0x44(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x30(%rbp),%eax
  sar    %eax
  sub    -0x48(%rbp),%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x2c(%rbp),%eax
  sar    %eax
  sub    -0x44(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x40(%rbp),%edx
  mov    -0x3c(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x20(%rbp),%eax
  sar    %eax
  sub    -0x3c(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x38(%rbp),%edx
  mov    -0x34(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x18(%rbp),%eax
  sar    %eax
  sub    -0x34(%rbp),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x30(%rbp),%edx
  mov    -0x2c(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x10(%rbp),%eax
  sar    %eax
  sub    -0x2c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x28(%rbp),%edx
  mov    -0x24(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  sar    %eax
  sub    -0x24(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x90(%rbp),%rax
  mov    -0x20(%rbp),%edx
  mov    %edx,(%rax)
  mov    -0x98(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0x10(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x98(%rbp),%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x98(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0x18(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x98(%rbp),%eax
  shl    $0x2,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0x14(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x98(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0x4(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x98(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x98(%rbp),%edx
  mov    %edx,%eax
  shl    $0x3,%eax
  sub    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0x1c(%rbp),%eax
  mov    %eax,(%rdx)
  nop
  leave
  ret
```

assistant: ```c
void BTIC2D_TransWHT_Stride8(int *iblk, int *oblk, int istride, int ostride) {
  int ib0, ib1, ib2, ib3, ib4, ib5, ib6, ib7;
  int a0, a1, a2, a3, a4, a5, a6, a7;
  int b0, b1, b2, b3, b4, b5, b6, b7;
  int c0, c1, c2, c3, c4, c5, c6, c7;
  ib0 = iblk[istride * 0];
  ib1 = iblk[istride * 1];
  ib2 = iblk[istride * 2];
  ib3 = iblk[istride * 3];
  ib4 = iblk[istride * 4];
  ib5 = iblk[istride * 5];
  ib6 = iblk[istride * 6];
  ib7 = iblk[istride * 7];
  a0 = ib0 + ib4;
  a1 = ib1 + ib5;
  a2 = ib2 + ib6;
  a3 = ib3 + ib7;
  a4 = (a0 >> 1) - ib4;
  a5 = (a1 >> 1) - ib5;
  a6 = (a2 >> 1) - ib6;
  a7 = (a3 >> 1) - ib7;
  b0 = a0 + a2;
  b1 = a1 + a3;
  b2 = (b0 >> 1) - a2;
  b3 = (b1 >> 1) - a3;
  b4 = a4 + a6;
  b5 = a5 + a7;
  b6 = (b4 >> 1) - a6;
  b7 = (b5 >> 1) - a7;
  c0 = b0 + b1;
  c1 = (c0 >> 1) - b1;
  c2 = b2 + b3;
  c3 = (c2 >> 1) - b3;
  c4 = b4 + b5;
  c5 = (c4 >> 1) - b5;
  c6 = b6 + b7;
  c7 = (c6 >> 1) - b7;
  oblk[ostride * 0] = c0;
  oblk[ostride * 1] = c4;
  oblk[ostride * 2] = c6;
  oblk[ostride * 3] = c2;
  oblk[ostride * 4] = c3;
  oblk[ostride * 5] = c7;
  oblk[ostride * 6] = c5;
  oblk[ostride * 7] = c1;
}
```