llvm dev - Sep 2020 - [cfe-dev] [RFC] Backend for Motorola 6800 series CPU (M68k)

Hi Chris,
> On Sep 24, 2020, at 9:41 PM, Chris Hanson <cmh at mac.com> wrote:
> 
> Thank you to everyone who worked on this! It looks like it's coming
along well.
Thank you :-)
> 
> What are your plans for handling the variety of ABIs used on 68000 systems?
ELF for Linux/NetBSD/SVR4 is certainly a reasonable starting point, but there
was quite a bit of variety in that area.
Currently we only support ELF for Linux. Our short-term goal is to fully support
Debian for M68K, followed by NetBSD support. So it’s likely that we will not
consider other ABIs any time soon.

Thank you
Min
> 
>  -- Chris
>

I know it's really early in the project's life, but another question I
had: How does the generated 68K code perform, at least compared to modern GCC?

  -- Chris

Hello Chris!

On 9/25/20 11:16 PM, Chris Hanson wrote:
> I know it's really early in the project's life, but another
question I had:
> How does the generated 68K code perform, at least compared to modern GCC?
I compiled a simple "Hello World" source in C both with a gcc-10
cross-compiler
for m68k and LLVM/m68k with the default optimization settings.

I'm attaching the original C source as well as the disassembled binary
source
for both compiler outputs.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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