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Re: RS6000/PowerPC -mpaired


On Tue, Jan 05, 2016 at 05:43:47PM +0000, Alan Lawrence wrote:
> Can anyone give me any pointers on how to use the -mpaired option ("PowerPC 
> 750CL paired-single instructions") ?

Configure your compiler with --target=powerpc-elf-paired, maybe add
--with-cpu=750 ?

> I'm trying to get it to use the 
> reduc_s{min,max,plus}_v2sf patterns in gcc/config/rs6000/paired.md, so far 
> I haven't managed to find a configuration that supports loading a vector of 
> floats but that doesn't also have superior altivec/v4sf support...

There are no processors with both paired and altivec.


Segher


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