Hello, The J-constant was mainly used by Arc 4 architecture for 32-bit integer constants. It got obsoleted once we pushed the new ARCompact architecture to gcc (GCC5.x+). The replace constraint is the Cal which is again a 32 bit constraint fitted for arithmetic ops.
Thank you, Claudiu > -----Original Message----- > From: Vlad Zakharov > Sent: Wednesday, August 24, 2016 11:51 AM > To: gmp-devel@gmplib.org; Vlad Zakharov <vzak...@synopsys.com> > Cc: Claudiu Zissulescu <claz...@synopsys.com>; > alexey.brod...@synopsys.com > Subject: Re: [PATCH] longlong.h: Fix obsolete ARC asm constraints > > Hello, > > I got inspiration from the following gcc patch: > https://gcc.gnu.org/ml/gcc-patches/2016-04/msg01964.html > > "J" constraint is rejected with recent gcc, so we have to replace it. > > Adding to "CC" our GCC maintainer, he can give better comments if you have > any further questions. > > On Mon, 2016-08-22 at 23:36 +0200, Marc Glisse wrote: > > On Wed, 17 Aug 2016, Vlad Zakharov wrote: > > > > > > > > We replace obsolete "J" constraint with "Cal" constraint. > > Hello, > > > > could you give a little more information please? In particular, does "Cal" > > work with older versions of gcc? Does "J" still work or is it rejected > > with a recent gcc? Do they mean the same thing? > > > > I trust that you know what you are doing, I just like to understand a > > patch before applying it. > > > -- > Best regards, > Vlad Zakharov <vzak...@synopsys.com> _______________________________________________ gmp-devel mailing list gmp-devel@gmplib.org https://gmplib.org/mailman/listinfo/gmp-devel
