Architectures and Processors forum How to compile with gcc toolchain that uses ARM neon instructions

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How to compile with gcc toolchain that uses ARM neon instructions

Haris over 11 years ago

Hi,

I would like to ask which version of gcc and with what flags , may I compile some c code to assembly code that uses arm neon coprocessor for ARMV7-A processor. Of course I want to use the processor itself but also the coprocessor. Is this gcc optimal?

Thank you

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Peter Harris over 11 years ago +1 verified

Which version of gcc If in doubt, grab the latest you can - it tends to improve things. and with what flags This paper includes some useful instructions: http://www.add.ece.ufl.edu/4924/docs/arm/ARM%20NEON...

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0 Martin Weidmann over 11 years ago in reply to Haris

The ARM Compiler 6 tool chain is based on LLVM, but currently that is aimed at ARMv8-A:
http://ds.arm.com/ds-5/build/arm-compiler-6/
I've not used the trunk version of LLVM, but looking at the Release Notes (LLVM 3.5 Release Notes — LLVM 3.4 documentation) the support seems to be there as well.
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0 Martin Weidmann over 11 years ago in reply to Haris

The ARM Compiler 6 tool chain is based on LLVM, but currently that is aimed at ARMv8-A:
http://ds.arm.com/ds-5/build/arm-compiler-6/
I've not used the trunk version of LLVM, but looking at the Release Notes (LLVM 3.5 Release Notes — LLVM 3.4 documentation) the support seems to be there as well.
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