[PATCH 2/2] x86: Disable AMX-TRANSPOSE by default

[Jiang, Haochen]

> From: Jan Beulich <jbeulich@suse.com>
> Sent: Friday, October 24, 2025 2:27 PM
> 
> On 24.10.2025 08:06, Haochen Jiang wrote:
> 
> What I think is missing is a test that the insns now won't be accepted by
> default, then also kind of replacing ...
> 
> > --- a/gas/testsuite/gas/i386/x86-64-amx-movrs-inval.l
> > +++ /dev/null
> > @@ -1,13 +0,0 @@
> > -.* Assembler messages:
> > -.*:5: Error: `\(%rip\)' cannot be used here
> > -.*:6: Error: `\(%rip\)' cannot be used here
> > -.*:7: Error: `\(%rip\)' cannot be used here
> > -.*:8: Error: `\(%rip\)' cannot be used here
> > -.*:9: Warning: operand 2 `%tmm1' implicitly denotes `%tmm0' to `%tmm1'
> group in `t2rpntlvwz0rs'
> > -.*:10: Warning: operand 2 `%tmm3' implicitly denotes `%tmm2' to
> `%tmm3' group in `t2rpntlvwz0rst1'
> > -.*:11: Warning: operand 2 `%tmm5' implicitly denotes `%tmm4' to
> `%tmm5' group in `t2rpntlvwz1rs'
> > -.*:12: Warning: operand 2 `%tmm7' implicitly denotes `%tmm6' to
> `%tmm7' group in `t2rpntlvwz1rst1'
> > -.*:16: Error: `t2rpntlvwz0rs' is not supported on `x86_64.noamx_transpose'
> > -.*:17: Error: `t2rpntlvwz0rst1' is not supported on
> `x86_64.noamx_transpose'
> > -.*:18: Error: `t2rpntlvwz1rs' is not supported on `x86_64.noamx_transpose'
> > -.*:19: Error: `t2rpntlvwz1rst1' is not supported on
> `x86_64.noamx_transpose'
> 
> ... what generates the last 4 diagnostics here, i.e. ...
> 
> > --- a/gas/testsuite/gas/i386/x86-64-amx-movrs-inval.s
> > +++ /dev/null
> > @@ -1,19 +0,0 @@
> > -# Check Invalid 64bit AMX-MOVRS instructions
> > -
> > -	.text
> > -_start:
> > -	t2rpntlvwz0rs	(%rip), %tmm2
> > -	t2rpntlvwz0rst1	(%rip), %tmm2
> > -	t2rpntlvwz1rs	(%rip), %tmm2
> > -	t2rpntlvwz1rst1	(%rip), %tmm2
> > -	t2rpntlvwz0rs	(%r9), %tmm1
> > -	t2rpntlvwz0rst1	(%r9), %tmm3
> > -	t2rpntlvwz1rs	(%r9), %tmm5
> > -	t2rpntlvwz1rst1	(%r9), %tmm7
> > -
> > -	.arch .noamx_transpose
> > -_transpose:
> > -	t2rpntlvwz0rs	(%r9), %tmm2
> > -	t2rpntlvwz0rst1	(%r9), %tmm2
> > -	t2rpntlvwz1rs	(%r9), %tmm2
> > -	t2rpntlvwz1rst1	(%r9), %tmm2
> 
> ... this part (with the .arch).
> 

I see. I will also add AMX-TF32&AMX-TRANSPOSE tests into
invalid test in my v2 patch.

Thx,
Haochen