Hi Matt,
Matt Turner <[email protected]> writes:
> Are you going to attempt to get these patches upstream any time soon?
>
> If not, I'll do it.
Sounds great, thanks! If you don't mind, please copy me on
correspondence regarding these patches.
A few notes regarding the Linux patches:
* In several places I wrote "Loongson paired-single format", but I've
since learned that the format is not Loongson-specific. Therefore the
name "Loongson" should probably be removed from those places.
* In the preliminary patches to GCC to add support for the
Loongson-specific madd/msub/nmadd/nmsub opcodes, these instructions
are referred to without the Loongson name, but rather by appending "3"
to their names, referring to the fact that they take 3 operands as
opposed to the usual 4 operands supported by the standard MIPS
madd/msub/nmadd/nmsub opcodes. The same patches rename the GCC
identifiers that refer to the standards 4-operand opcodes by appending
"4" to their names.
Therefore, whereas I named these opcodes 'loongson_madd_op' et al,
it's probably better to follow the naming convention of the
preliminary GCC patches. After all, it's quite possible that other
MIPS processors will adopt these Loongson opcodes.
Note that the reason they reduced the number of operands was to make
space for the 'fmt' field, which allows these instructions to work on
paired-singles and maybe some other formats too (I have forgotten
those details).
* In the current patches, the new code is within "#ifdef __loongson_fp",
but that will no longer be appropriate after making the changes
recommended above.
* Feel free to remove the copyright notice that I added near the top of
cp1emu.c.
> Assuming you don't have copyright assignment for binutils and gdb, can
> you please declare the final patch to be public domain?
I suspect the final patch is small enough that copyright assignment will
not be needed, but if the maintainers complain, I can file the paperwork
easily enough. I live very close to the main FSF offices.
Thanks,
Mark
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