[llvm-commits] [llvm] r148658 - in /llvm/trunk: lib/Target/ARM/ARM.td lib/Target/ARM/ARMAsmPrinter.cpp lib/Target/ARM/ARMInstrInfo.td lib/Target/ARM/ARMInstrNEON.td lib/Target/ARM/ARMInstrVFP.td lib/Target/ARM/ARMSchedule.td lib/Target/ARM/ARMSub

[James Molloy]

Hi Anton,

Unless I'm missing something, I can't see where the Cortex-A15 TRM mentions what legal combinations of NEON and VFP there are?

It's just describing what the A15 implements, not what is theoretically possible.

Cheers,

James
________________________________________
From: anton at korobeynikov.info [anton at korobeynikov.info] On Behalf Of Anton Korobeynikov [asl at math.spbu.ru]
Sent: 24 January 2012 20:34
To: James Molloy
Cc: Jim Grosbach; llvm-commits at cs.uiuc.edu
Subject: Re: [llvm-commits] [llvm] r148658 - in /llvm/trunk: lib/Target/ARM/ARM.td lib/Target/ARM/ARMAsmPrinter.cpp lib/Target/ARM/ARMInstrInfo.td lib/Target/ARM/ARMInstrNEON.td lib/Target/ARM/ARMInstrVFP.td lib/Target/ARM/ARMSchedule.td lib/Target/ARM/ARMSub

Hi James,

> >From my discussions with colleagues we come to a different conclusion - that it is indeed possible to have the NEONv2 vector integer unit without the floating point unit of VFPv4.
> We don't think it's possible to have VFPv4 with NEONv1 however.
Well... this conflicts with that doc I mentioned. Where is the truth? :)

--
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University


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