Re: [PATCH v2 2/3] x86/cpu/intel: Simplify F00F bug notice using pr_notice_once()

[H. Peter Anvin]

On May 27, 2026 9:14:10 AM PDT, "Maciej W. Rozycki" <macro@xxxxxxxxxxx> wrote:
>On Wed, 27 May 2026, H. Peter Anvin wrote:
>
>> >> If full precision is enabled there are a whole lot of horrid corner cases.
>> >> Mostly due to correctly generating the FP signals when the 80bit return
>> >> value from a function is written to a 64bit 'double'.
>> >
>> > No IEEE quad for `long double' still, not even on 64-bit hw?  Weird.
>> 
>> The ABI was designed in 2003 or so...
>
> Hmm, usually it's hardware that gets features first with software to 
>follow.  For instance by now the POWER port has gained three `long double' 
>formats in their psABI, all of which can coexist in a single system (I got 
>that covered in the course of the glibc test improvement effort too).
>
>  Maciej

The x87 psABI does have a __float128 type IIRC.