Re: [PATCH v2 2/3] x86/cpu/intel: Simplify F00F bug notice using pr_notice_once()
From: H. Peter Anvin
Date: Wed May 27 2026 - 11:45:36 EST
On May 27, 2026 2:23:35 AM PDT, "Maciej W. Rozycki" <macro@xxxxxxxxxxx> wrote:
>On Wed, 27 May 2026, David Laight wrote:
>
>> > However, x87 should be testable on any x86 silicon.
>>
>> And gets used for 'long double' on x86-64.
>>
>> 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.
>
> Maciej
The ABI was designed in 2003 or so...