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Re: [Patch AArch64 docs] Document the RcPc extension
- From: James Greenhalgh <james dot greenhalgh at arm dot com>
- To: <gcc-patches at gcc dot gnu dot org>
- Cc: <nd at arm dot com>, <richard dot earnshaw at arm dot com>, <marcus dot shawcroft at arm dot com>
- Date: Mon, 3 Jul 2017 11:44:18 +0100
- Subject: Re: [Patch AArch64 docs] Document the RcPc extension
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On Fri, Jun 23, 2017 at 11:21:43AM +0100, James Greenhalgh wrote:
>
> Hi,
>
> Andrew pointed out that I did not document the new architecture extension
> flag I added the RcPc iextension. This was intentional, as enablihg the rcpc
> extension does not change GCC code generation, and is just an assembler flag.
> But for completeness, here is documentation for the new option.
>
> OK?
Ping.
Thanks,
James
> 2017-06-21 James Greenhalgh <james.greenhalgh@arm.com>
>
> * doc/invoke.texi (rcpc architecture extension): Document it.
>
> diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> index 7e7a16a5..db00e51 100644
> --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -14172,6 +14172,10 @@ Enable Large System Extension instructions. This is on by default for
> @option{-march=armv8.1-a}.
> @item fp16
> Enable FP16 extension. This also enables floating-point instructions.
> +@item rcpc
> +Enable the RcPc extension. This does not change code generation from GCC,
> +but is passed on to the assembler, enabling inline asm statements to use
> +instructions from the RcPc extension.
>
> @end table
>