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Re: powerpc -mcpu=common equivalent ?


On Thu, Feb 09, 2017 at 01:47:33PM -0500, David Edelsohn wrote:
> Freescale did not implement the POWER architecture.  Again, POWER is a
> comment about the original IBM POWER architecture (RIOS processors)
> and used in RISC System/6000 computers, not the recent POWER
> processors called POWER4, POWER5, POWER6, POWER7, POWER8, POWER9.
> 
> lwsync is part of the ISA and Freescale did not fully implement the
> architecture.
> 
> Freescale or someone needs to implement a patch to target the
> Freescale non-compliant processors.

It seems with -mcpu=8540 and -mcpu=8548 you get sync instead of lwsync:
/* E500 cores only support plain "sync", not lwsync.  */
#define TARGET_NO_LWSYNC (rs6000_cpu == PROCESSOR_PPC8540 \
                          || rs6000_cpu == PROCESSOR_PPC8548)
The question is if all the CPUs you're using are these 2, or if you use some
others that might not be superset of those.

	Jakub


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