[PATCH] Support Intel AVX10.2 media instructions

[Jan Beulich]

On 02.09.2024 09:14, Jiang, Haochen wrote:
>> From: Jiang, Haochen
>> Sent: Monday, September 2, 2024 3:12 PM
>>
>>> From: Jan Beulich <jbeulich@suse.com>
>>> Sent: Friday, August 30, 2024 8:53 PM
>>>
>>> On 29.08.2024 09:16, Haochen Jiang wrote:
>>>> --- /dev/null
>>>> +++ b/gas/testsuite/gas/i386/avx10_2-256-1.s
>>>> @@ -0,0 +1,140 @@
>>>> +# Check 32bit AVX10.2/256 instructions
>>>> +
>>>> +	.arch generic32
>>>> +	.arch .avx10.2/256
>>>> +	.text
>>>> +_start:
>>>> +	.irp m, ss, su, uu
>>>> +	vpdpb\m\()d	%ymm4, %ymm5, %ymm6{%k7}
>>>> +	vpdpb\m\()d	%xmm4, %xmm5, %xmm6{%k7}
>>>> +	vpdpb\m\()d	0x10000000(%esp, %esi, 8), %ymm5, %ymm6{%k7}
>>>> +	vpdpb\m\()d	(%ecx){1to8}, %ymm5, %ymm6
>>>> +	vpdpb\m\()d	4064(%ecx), %ymm5, %ymm6{%k7}
>>>> +	vpdpb\m\()d	-512(%edx){1to8}, %ymm5, %ymm6{%k7}{z}
>>>> +	vpdpb\m\()d	0x10000000(%esp, %esi, 8), %xmm5, %xmm6{%k7}
>>>> +	vpdpb\m\()d	(%ecx){1to4}, %xmm5, %xmm6
>>>> +	vpdpb\m\()d	2032(%ecx), %xmm5, %xmm6{%k7}
>>>> +	vpdpb\m\()d	-512(%edx){1to4}, %xmm5, %xmm6{%k7}{z}
>>>> +	vpdpb\m\()ds	%ymm4, %ymm5, %ymm6{%k7}
>>>> +	vpdpb\m\()ds	%xmm4, %xmm5, %xmm6{%k7}
>>>> +	vpdpb\m\()ds	0x10000000(%esp, %esi, 8), %ymm5, %ymm6{%k7}
>>>> +	vpdpb\m\()ds	(%ecx){1to8}, %ymm5, %ymm6
>>>> +	vpdpb\m\()ds	4064(%ecx), %ymm5, %ymm6{%k7}
>>>> +	vpdpb\m\()ds	-512(%edx){1to8}, %ymm5, %ymm6{%k7}{z}
>>>> +	vpdpb\m\()ds	0x10000000(%esp, %esi, 8), %xmm5, %xmm6{%k7}
>>>> +	vpdpb\m\()ds	(%ecx){1to4}, %xmm5, %xmm6
>>>> +	vpdpb\m\()ds	2032(%ecx), %xmm5, %xmm6{%k7}
>>>> +	vpdpb\m\()ds	-512(%edx){1to4}, %xmm5, %xmm6{%k7}{z}
>>>> +	.endr
>>>
>>> The 2nd half is fully redundant with the 1st, except for the trailing s.
>>> Use a 2nd, nested .irp?
>>
>> I am not sure if it could be done with .irp, n, ,s or something similar.
>> I will have a try.
> 
> After I sent that out, I immediately found that we could use .irp n, d, ds
> to get that. I will change to that.

Please try to avoid that:

	.irp s,"",s

surely ought to work (and is imo better than the possible ".irp s,,s" for
making explicit that <nothing> is indeed meant). Alternatively

	.irpc s," s"

might also be an option.

Jan