[PATCH v2] gas: m68k M680LC040 F-LINE NOP insertion fixing emulation of fpu instructions

[Nathanial Sloss]

On Sun, 30 Mar 2025 14:52:36 Nathanial Sloss wrote:
> Hi,
> 
> The m68k m68lc040 (early revisions) have an issue after executing f-line
> (co processor mmu/fpu) instructions and executing a trap in the case of
> fpu emulation.
> 
> Unfornately due to time passed the processor errata as to how to address
> the issue has been lost.
> 
> Fortunately the issue was documented in a NetBSD PR:
> 
> http://gnats.netbsd.org/13078
> 
> Which proposes a solution to the problem which I have patched the GNU
> assembler for.
> 
> As I have an affected machine with an lc040 processor I can confirm that
> all programmes compiled with the patched assember work as expected.
> 
> 

I've changed the patch so the nop insertion is not the default.

Now one has to pass -mlcfix to enable it.


> Best regards,
> 
> Nat
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