[PATCH 0/5] x86 pseudo-normal numbers

[Siddhesh Poyarekar]

On 12/15/20 11:56 PM, Joseph Myers wrote:
> On Tue, 15 Dec 2020, Siddhesh Poyarekar via Libc-alpha wrote:
> 
>> Pseudo-denormal numbers are not catered for in this patch.  The x86 CPU
>> supposedly treats these numbers as denormals, but both gcc and glibc
>> currently treat them as normals.
> 
> The CPU treats them as denormals in that it signals the (x86-specific)
> "denormal operand" exception for them, but otherwise treats them as if the
> biased exponent were 1.  Since the "denormal operand" exception is not
> part of ISO C or FE_ALL_EXCEPT and glibc does not attempt to produce any
> particular semantics for when it is raised, making glibc handle them the
> same as the processor does means handling them the same as the
> corresponding normal representations.

That's perfect, I'll not bother with them anymore then.

Thanks,
Siddhesh