No, I think he probably meant (1F-1F) to get 0.0F value? -----Original Message----- From: Tinycc-devel [mailto:tinycc-devel-bounces+eligis=orange...@nongnu.org] On Behalf Of Kyryl Melekhin Sent: Thursday, February 11, 2021 08:36 To: tinycc-devel@nongnu.org Subject: Re: [Tinycc-devel] Regarding Long double Constant
Ayush Varshney <varshneyayus...@gmail.com> wrote: > Hi everyone, > Hope you all are doing well!! > I am new to the tinycc community. > I was working over Diverse Double-compiling technique [1]. And found there > is a bad optimization performed by tcc. The problem is called Long double > constant problem. > > *Long double constant problem* is for storing the value of 0.0, tcc stores > 0.0 in memory as > long double value but long double value in tcc takes only 10 bytes but the > source code > stores 0.0 value in 12 bytes. The extra two bytes creates variations in the > output. The > problem is solved using (f1-f1) instead of 0.0, it is semantically same and > produces the > same output. For example, > Instead of *if(f2==0.0)* use *if(f2==f1-f1)* > > I have pushed my solution > <https://repo.or.cz/tinycc.git/commit/405aef9155fb66e280dac82ce521d5d2ea06f2ab> > and please let me know if you have any queries regarding it. > > Regards > Ayush Hello Ayush, tccgen.c:8105:41: error: 'f1' undeclared (first use in this function); did you mean 'y1'? 8105 | else if (vtop->c.ld == (f1-f1) ) | ^~ | y1 I don't know where you found f1 in that function but the build is broken right now. Typo? Regards. _______________________________________________ Tinycc-devel mailing list Tinycc-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/tinycc-devel _______________________________________________ Tinycc-devel mailing list Tinycc-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/tinycc-devel
