why aarch64 doesn't support V4QI.

[Richard Earnshaw]

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.