help: standard name of vector mode

help: standard name of vector mode

[彭建章]

I'm porting gcc , and use its autovectorization.
How can I know wether a  standard name support a vector mode ?

Thanks!

Re: help: standard name of vector mode

[Ian Lance Taylor]

彭建章 <jianzhangpeng@gmail.com> writes:

> I'm porting gcc , and use its autovectorization.
> How can I know wether a  standard name support a vector mode ?

The standard names all have modes built into them.  If you are porting
gcc, then you need to write a define_expand or define_insn in your MD
file with a standard name which incorporates the vector mode that you
are using.  Using the standard name will enable the middle-end of gcc
to know about your operation.  There are many examples in the existing
gcc backends.

Ian

Re: help: standard name of vector mode

[Hans-Peter Nilsson]

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On Thu, 15 Oct 2009, Åí½¨Õ wrote:
> I'm porting gcc , and use its autovectorization.
> How can I know wether a  standard name support a vector mode ?

I might misunderstand your question, but the vector modes that
are supported are enumerated by the port.  See e.g.
gcc/config/i386/i386-modes.def, the VECTOR_MODE lines.

With that done, the machine description defines the
standard-name-patterns for vector insns that apply to the port
(which includes those modes as part of the names, as mentioned).

brgds, H-P