Re: GLPSOL in webassemby faster than native ?

[Domingo Alvarez Duarte]

Hello Michael !

Thank you for reply !

I'll take into account the use of possible wider float format for 
intermediary values using something like your suggestion of redefinable 
type like "glp_double_t" (actually in gcc 9 in linux x86 "double_t" and 
"double" are equal).

But also leave the possibility of have it working (somehow) with 
float32, float64, float80, float128, ... everywhere.

Again help/suggestions/comments are welcome !

Cheers !

On 24/9/20 21:18, Michael Hennebry wrote:
> On Thu, 24 Sep 2020, Domingo Alvarez Duarte wrote:
>
> > I just got glpsol with "long double" working and add binaries for 
> > anyone that want to test then here 
> > https://github.com/mingodad/GLPK/releases
> >
> > As noted there it'll benefit from tuning the constants in 
> > src/glpk_real.h
> >
> > Any help/suggestion/comment is welcome !
>
> Note that using long doubles everywhere
> would slow down a memory bound computation.
> Fetching more data would be required.
>
> One might introduce glp_double_t.
> C99 uses double_t for the type in which unnamed
> intermediate results of double calculations are stored.
>
> Use glp_double_t for locals that are not arrays,
> especially running totals.
> Do the casts to ensure that desired calculations
> are actually done in glp_double_t.