why not have mips64-n64

[dailei2018]

below is my machine and binary information

#uname -a
Linux usm.secondary.10.113.58.152 4.19.0-loongson-3-server #20211013 SMP PREEMPT Uos 4.19.0-eagle Wed Oct 13 15:36:26 CST 2 mips64 GNU/Linux

#file gzip
gzip: ELF 64-bit LSB shared object, MIPS, MIPS64 rel2 version 1 (SYSV), dynamically linked, interpreter /lib64/ld.so.1, BuildID[sha1]=396518ffad8b2bc976f82ebc9b398d7d2b354faf, for GNU/Linux 3.2.0, stripped

[tpetazzoni]

Which particular mips64 variant are you interested in? mips64 big endian or little endian? Generic mips64, or mips64r2, mips64r3, mips64r5, mips64r6, or some other MIPS variant?

The reason why no mips64-n64 toolchain is offered for now because no-one asked for it, and it's not clear (to me at least) what are the relevant variants of mips64 to support. If you provide some guidance in this area, we will certainly be willing to add more variants.

[FlyGoat]

Hi @tpetazzoni,

MIPS64 n64 variants are useful for all 64 bit capable MIPS arch variants, ideally that would be mips64, mips64r2, mips64r5, mips64r6, since nowadays most MIPS64 distros are using n64 ABI (while n32 is actually x32 for x86).

Ping me if you need any help on MIPS.

Thanks

[tpetazzoni]

Sorry for the slow feedback. Which specific HW platforms would be targeted by those toolchains? I'm just trying to figure out if it makes sense to add 3 more toolchains (mips64, mips64r2 and mips64r5).

[FlyGoat]

For my use cases it would be mips3 for loongson2f; mips64r2 for Loongson 3A1000-3000; mips64r5 (nan2008) for loongson 3a4000; mips64r6 for I6500 (Boston/EyeQ5).