Convert inline x86 assembly to working x64 assembly

I have a Delphi function that uses inline assembly. It compiles for x86 and I now need to convert it to x64 code. It should be obvious that I am using Delphi XE2. I need someone with Delphi XE2 who is an expert in intel x64 assembly. I can supply a project containing the code on application. Please note I am not interested in alternative solutions. This is something that can only be done with assembly code. Applicants must have Delphi XE2 and must be able to demonstrate knowledge of 64 bit assembly.