On Thu, 2020-02-20 at 22:23 +0800, Yin Shiyou wrote: > It's suggested to use '-mloongson-mmi' to enable MMI. > To keep compatible with old processor, '-mloongson-mmi' will be > setted for Loongson-3A only.
The pattern we've used for other CPUs is to build support for as many ISA extensions as possible, unless they are explicitly disabled. Distributions tend to want to set their own minimum ISA levels, and if they wanted to assert -mloongson-mmi they would already have added it to CFLAGS globally. Do you have any performance data for this change? If setting -mloongson-mmi means the compiler can do useful autovectorization, then that's probably true for other arches too (eg amd64 vs avx2), and we should support this kind of thing more generically. But as it stands I don't think this patch is a good idea. - ajax _______________________________________________ Pixman mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/pixman
