search for: __excepts

...ude/bits/fenvinline.h with an error like: ./boost/math/tools/config.hpp:279:10: error: invalid input constraint 'i#*X' in asm feclearexcept(FE_ALL_EXCEPT); ^ /usr/include/bits/fenvinline.h:56:11: note: expanded from macro 'feclearexcept' : : "i#*X"(__builtin_ffs (__excepts))); \ ^ 1 error generated. There is a comment in the file which reads: /* The weird 'i#*X' constraints on the following suppress a gcc warning when __excepts is not a constant. Otherwise, they mean the same as just plain 'i'. */ F...

On Fri, 2012-04-27 at 14:54 -0500, Hal Finkel wrote: > There is a comment in the file which reads: > > /* The weird 'i#*X' constraints on the following suppress a gcc > warning when __excepts is not a constant. Otherwise, they mean the > same as just plain 'i'. */ [sinp] > ("mtfsb0 %s0" : : "i#*X"(__builtin_ffs (__excepts))); [snip] > Does anyone know what that "weird" asm constraint actually means? The "i" and "X&qu...

...19:33:58 -0500 Peter Bergner <bergner at vnet.ibm.com> wrote: > On Fri, 2012-04-27 at 14:54 -0500, Hal Finkel wrote: > > There is a comment in the file which reads: > > > > /* The weird 'i#*X' constraints on the following suppress a gcc > > warning when __excepts is not a constant. Otherwise, they mean > > the same as just plain 'i'. */ > [sinp] > > ("mtfsb0 %s0" : : "i#*X"(__builtin_ffs (__excepts))); > [snip] > > Does anyone know what that "weird" asm constraint actually means? > >...

...19:33:58 -0500 Peter Bergner <bergner at vnet.ibm.com> wrote: > On Fri, 2012-04-27 at 14:54 -0500, Hal Finkel wrote: > > There is a comment in the file which reads: > > > > /* The weird 'i#*X' constraints on the following suppress a gcc > > warning when __excepts is not a constant. Otherwise, they mean > > the same as just plain 'i'. */ > [sinp] > > ("mtfsb0 %s0" : : "i#*X"(__builtin_ffs (__excepts))); > [snip] > > Does anyone know what that "weird" asm constraint actually means? > >...