user: Please show me the C implementation that matches the assembly code listed below:

```asm
<BTIC2D_TransIWHT_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),%eax
  sar    %eax
  sub    -0x64(%rbp),%eax
  mov    %eax,-0x60(%rbp)
  mov    -0x80(%rbp),%eax
  sub    -0x60(%rbp),%eax
  mov    %eax,-0x5c(%rbp)
  mov    -0x74(%rbp),%eax
  sar    %eax
  sub    -0x70(%rbp),%eax
  mov    %eax,-0x58(%rbp)
  mov    -0x74(%rbp),%eax
  sub    -0x58(%rbp),%eax
  mov    %eax,-0x54(%rbp)
  mov    -0x7c(%rbp),%eax
  sar    %eax
  sub    -0x68(%rbp),%eax
  mov    %eax,-0x50(%rbp)
  mov    -0x7c(%rbp),%eax
  sub    -0x50(%rbp),%eax
  mov    %eax,-0x4c(%rbp)
  mov    -0x78(%rbp),%eax
  sar    %eax
  sub    -0x6c(%rbp),%eax
  mov    %eax,-0x48(%rbp)
  mov    -0x78(%rbp),%eax
  sub    -0x48(%rbp),%eax
  mov    %eax,-0x44(%rbp)
  mov    -0x5c(%rbp),%eax
  sar    %eax
  sub    -0x54(%rbp),%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x60(%rbp),%eax
  sar    %eax
  sub    -0x58(%rbp),%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x5c(%rbp),%eax
  sub    -0x40(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x60(%rbp),%eax
  sub    -0x3c(%rbp),%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x4c(%rbp),%eax
  sar    %eax
  sub    -0x44(%rbp),%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x50(%rbp),%eax
  sar    %eax
  sub    -0x48(%rbp),%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x4c(%rbp),%eax
  sub    -0x30(%rbp),%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x50(%rbp),%eax
  sub    -0x2c(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x38(%rbp),%eax
  sar    %eax
  sub    -0x28(%rbp),%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x34(%rbp),%eax
  sar    %eax
  sub    -0x24(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x40(%rbp),%eax
  sar    %eax
  sub    -0x30(%rbp),%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x3c(%rbp),%eax
  sar    %eax
  sub    -0x2c(%rbp),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x38(%rbp),%eax
  sub    -0x20(%rbp),%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x34(%rbp),%eax
  sub    -0x1c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x40(%rbp),%eax
  sub    -0x18(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x3c(%rbp),%eax
  sub    -0x14(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x90(%rbp),%rax
  mov    -0x10(%rbp),%edx
  mov    %edx,(%rax)
  mov    -0x98(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x90(%rbp),%rax
  add    %rax,%rdx
  mov    -0xc(%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    -0x4(%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    -0x20(%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    -0x1c(%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    -0x18(%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    -0x14(%rbp),%eax
  mov    %eax,(%rdx)
  nop
  leave
  ret
```

assistant: ```c
void BTIC2D_TransIWHT_Stride8(int *iblk, int *oblk, int istride, int ostride) {
  int ob0, ob1, ob2, ob3, ob4, ob5, ob6, ob7;
  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;
  c0 = iblk[istride * 0];
  c4 = iblk[istride * 1];
  c6 = iblk[istride * 2];
  c2 = iblk[istride * 3];
  c3 = iblk[istride * 4];
  c7 = iblk[istride * 5];
  c5 = iblk[istride * 6];
  c1 = iblk[istride * 7];
  b1 = (c0 >> 1) - c1;
  b0 = c0 - b1;
  b3 = (c2 >> 1) - c3;
  b2 = c2 - b3;
  b5 = (c4 >> 1) - c5;
  b4 = c4 - b5;
  b7 = (c6 >> 1) - c7;
  b6 = c6 - b7;
  a2 = (b0 >> 1) - b2;
  a3 = (b1 >> 1) - b3;
  a0 = b0 - a2;
  a1 = b1 - a3;
  a6 = (b4 >> 1) - b6;
  a7 = (b5 >> 1) - b7;
  a4 = b4 - a6;
  a5 = b5 - a7;
  ob4 = (a0 >> 1) - a4;
  ob5 = (a1 >> 1) - a5;
  ob6 = (a2 >> 1) - a6;
  ob7 = (a3 >> 1) - a7;
  ob0 = a0 - ob4;
  ob1 = a1 - ob5;
  ob2 = a2 - ob6;
  ob3 = a3 - ob7;
  oblk[ostride * 0] = ob0;
  oblk[ostride * 1] = ob1;
  oblk[ostride * 2] = ob2;
  oblk[ostride * 3] = ob3;
  oblk[ostride * 4] = ob4;
  oblk[ostride * 5] = ob5;
  oblk[ostride * 6] = ob6;
  oblk[ostride * 7] = ob7;
}
```