Re: propose mips32r2 for mips{,el} and mips64r2 for mips64el in Debian
On Sun, Sep 6, 2015 at 7:05 PM, Aurelien Jarno <aurelien@aurel32.net> wrote:
> On 2015-09-04 14:10, YunQiang Su wrote:
>> hi, folks,
>>
>> As all of us may know that the current ISA used for mips{,el} in
>> Debian is MIPS II,
>> which is quite, quite old, and make all newer devices running in a slow speed.
>>
>> As the step 0, we have already enable FPXX and no-odd-spreg in gcc-5 by default.
>> Build with FPXX and no-odd-spreg, the binary can compatible with both old mips2
>> architecture and the future FP64 architecture (aka, with 32 64-bit FPR)[1].
>>
>> The next step, we will build gcc-5 with the default ISA with mips32r2/mips64r2.
>
> Please note that we should ensure that people can upgrade from jessie to
> stretch. It means that libraries from jessie (this targetting the MIPS
> II ISA) should be able to work with libraries from stretch. In turn it
> means we can switch the ISA to MIPS64R2, but we should still keep using
> FPXX for stretch, and switch to FP64 just after.
Yes, we will make stretch FPXX+MIPS32r2, which is compatible with
current MIPS II + FR=0.
FP64 is a long future story. we are not plan yet.
>
> --
> Aurelien Jarno GPG: 4096R/1DDD8C9B
> aurelien@aurel32.net http://www.aurel32.net
--
YunQiang Su
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