[llvm-dev] LLVM z80 backend and llvm-dis missing?

Philipp Klaus Krause via llvm-dev llvm-dev at lists.llvm.org
Wed Oct 5 00:32:50 PDT 2016

On 05.10.2016 00:24, Jan Wilmans via llvm-dev wrote:
> Inspired by Jason Turner's talk at  CppCon 2016: Jason Turner “Rich Code
> for Tiny Computers: A Simple Commodore 64 Game in C++17”
> I got interested in writing a Zilog Z80 backend for LLVM. Jason actually
> did no such thing, but instead wrote a x86-to-6502 translator
> (reassembler he calls it) https://github.com/lefticus/x86-to-6502
> So I'm now trying to bootstrap this project.
> Goal:
> - be able to use C++17 (or whatever is supported of that in
> clang-master) on my Z80 based MSX2 computer.
> why? you might ask, well, just because I'm a software engineer and I
> like doing something I have not tried before.
> In the past I have created a PC-to-MSX USB-interface called the 'nowind'
> interface (http://nowind.nl/)
> It is actually a MSX2-compatible cartridge that from the MSX2
> perspective appears to be a diskdrive, but actually the 'disk' is a
> disk-image file on the PC.
> The host-software is written in c++98 and the z80-software (residing in
> flashrom) is written in z80-assembly, which I mastered quite well back then.
> So why am I telling you this?
> I would like to get some pointers on how to get started.
> My development environment is currently windows, but if there is any
> advantage in switching to linux, that is also fine.
> I have gcc/gdb experience but its a little rusty.
> so I started reading http://llvm.org/docs/GettingStarted.html,
> and downloaded http://llvm.org/releases/3.9.0/LLVM-3.9.0-win64.exe
> precompiled binaries to get the hang of the toolchain.
> Couple of questions:
> - First thing I noticed is that clang-dis is not part of the
> pre-compiled package?
> - What is a wise approach, should I compile clang from scratch to get
> clang-dis?
> - are LLVM  backends for clang also in the
> trunk http://llvm.org/git/llvm.git ?
> - should I start by examining and existing backend, if so, where do I
> find one?
> I hope anyone can give me some guidance to bootstrap this... 
> Greetings,
> Jan

The easiest to get C++17 on the Z80 is probably using the experimental
LLVM+SDCC toolchain:
Though there is still some work to be done it should be much easier to
make useable for you than to get full Z80 support in LLVM itself.


More information about the llvm-dev mailing list