[PATCH 1/6] Support Intel AMX-TRANSPOSE

[Jan Beulich]

On 13.11.2024 09:56, Jiang, Haochen wrote:
>> From: Haochen Jiang <haochen.jiang@intel.com>
>> Sent: Wednesday, November 13, 2024 4:45 PM
>>
>> To implement TMM pair, we introduced TMMPairOperand into
>> i386_opcide_modifier. We allocated three bit for this to indicate
>> whether and which tmm register is tmm pair register for flexiblity
>> in future. In assembler, we need to adjust tmm register number to
>> even number for tmm pair register.
>>
> 
> Forgot to mention here. It might be the similar register scenario
> as Jan mentioned in this thread:
> https://sourceware.org/pipermail/binutils/2024-November/137588.html
> 
> When we wrote this patch, we did not realize we could use that.
> I will have a try if we can have a simple way.

Yes, that looks like it'll want re-using. Even if not, I don't see why
3 bits need using there. If and when such insns appear, we can decide#
whether to widen a field, or how else to approach the situation.

Jan