Re: floating point woes on i386

Joerg Sonnenberger <[email protected]> Sat, 27 Sep 2025 10:36:59 +0200

Newsgroups	gmane.os.netbsd.devel.userlevel
Message-ID	<[email protected]>

On 9/26/25 5:50 PM, RVP wrote:

> On Thu, 25 Sep 2025, Greg Troxel wrote:
>
>> I ran paranoia (pkgsrc/benchmarks/paranoia) on 9 and 10.  On 9:
>>
>>  The number of  FAILUREs  encountered =       3.
>>  The number of  SERIOUS DEFECTs  discovered = 4.
>>  The number of  DEFECTs  discovered =         3.
>>  The number of  FLAWs  discovered =           2.
>>
>> which is shocking, especially as I remember earlier NetBSD i386 versions
>> being ok, like 5 or 7.
>>
>
> Force strict standards compliance with `-std=c89' or `-std=c99', or 
> pass the
> `-fexcess-precision=standard' flag to the compiler.

There is on newer i386 also the option of using -mfpmath=sse. That's 
strictly speaking the only way to get IEEE754 semantics on i386.

Joreg