linux-kernel - Re: [PATCH 2/2] powerpc: add ALTIVEC support to lib/ when PPC

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Date:   Mon, 19 Apr 2021 15:38:02 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Segher Boessenkool <segher@...nel.crashing.org>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 2/2] powerpc: add ALTIVEC support to lib/ when PPC_FPU not
 set



Le 19/04/2021 à 15:32, Segher Boessenkool a écrit :
> Hi!
> 
> On Sun, Apr 18, 2021 at 01:17:26PM -0700, Randy Dunlap wrote:
>> Add ldstfp.o to the Makefile for CONFIG_ALTIVEC and add
>> externs for get_vr() and put_vr() in lib/sstep.c to fix the
>> build errors.
> 
>>   obj-$(CONFIG_PPC_FPU)	+= ldstfp.o
>> +obj-$(CONFIG_ALTIVEC)	+= ldstfp.o
> 
> It is probably a good idea to split ldstfp.S into two, one for each of
> the two configuration options?
> 

Or we can build it all the time and #ifdef the FPU part.

Because it contains FPU, ALTIVEC and VSX stuff.

Christophe