On Wed, 2013-11-20 at 12:47 -0600, Kumar Gala wrote: > On Nov 20, 2013, at 10:41 AM, Scott Wood <scottw...@freescale.com> wrote: > > > On Wed, 2013-11-20 at 16:35 +0800, Tiejun Chen wrote: > >> CONFIG_ALTIVEC is always enabled for CoreNet64. > > > > In the defconfig perhaps, but this isn't a generally true statement. > > > >> And if we select CONFIG_E{5,6}500_CPU this may introduce -mcpu=e500mc64 > >> into $CFLAGS. But Altivec and Spe options not allowed with > >> e500mc64, so : > > > > Sigh. > > > >> CC arch/powerpc/lib/xor_vmx.o > >> arch/powerpc/lib/xor_vmx.c:1:0: error: AltiVec not supported in this target > >> make[1]: *** [arch/powerpc/lib/xor_vmx.o] Error 1 > >> make: *** [arch/powerpc/lib] Error 2 > >> > >> Signed-off-by: Tiejun Chen <tiejun.c...@windriver.com> > >> --- > >> arch/powerpc/lib/Makefile | 3 +++ > >> 1 file changed, 3 insertions(+) > >> > >> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile > >> index 95a20e1..641a77d 100644 > >> --- a/arch/powerpc/lib/Makefile > >> +++ b/arch/powerpc/lib/Makefile > >> @@ -40,5 +40,8 @@ obj-y += code-patching.o > >> obj-y += feature-fixups.o > >> obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o > >> > >> +# Altivec and Spe options not allowed with e500mc64 in GCC. > >> +ifeq ($(call cc-option-yn,-mcpu=e500mc64),n) > >> obj-$(CONFIG_ALTIVEC) += xor_vmx.o > >> CFLAGS_xor_vmx.o += -maltivec -mabi=altivec > >> +endif > > > > This does not seem like the right fix. What if GCC supports both > > -mcpu=e500mc64 and -mcpu=e6500, and we're using the latter? Or for that > > matter, if we're using -mcpu=whatever-ibm-chip-has-this? > > > > Plus, wouldn't you need to do something to prevent code in that file > > from being called? > > > > -Scott > > Why does -mcpu=e500mc64 get you spe enabled? It shouldn’t as no e500mc or > greater part has spe. Can you try using -mno-spe -maltivec?
I don't think SPE is relevant. The problem is that GCC refuses to allow -maltivec to be combined with -mcpu=e500mc64. -mno-spe doesn't make a difference. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev