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List:       gcc
Subject:    Re: why aarch64 doesn't support V4QI.
From:       Richard Earnshaw via Gcc <gcc () gcc ! gnu ! org>
Date:       2020-12-18 22:16:14
Message-ID: a910a9aa-b0d4-01eb-d2f1-6fa73f07f8b2 () foss ! arm ! com
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On 15/12/2020 14:26, 172060045@hdu.edu.cn wrote:
> Hi,
> 
> I have some problems in gcc development about aarch64. I saw it doesn't support 
> V4QI machine mode in aarch64-modes.def, but it has V4QI in arm-modes.def.
> 
> I want to know why it doesn't?
> 
> I am looking forward your replies. Thanks for your help.
> 
> Best regards,
> yancheng
> 

v4qi was used on arm for supporting the Intel XScale wireless-mmx
extensions.  But that doesn't exist in AArch64.

R.
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