------- Comment #5 from tydeman at tybor dot com 2009-01-30 22:42 ------- I consider emulation of decimal FP to be part of the compiler's job. Part of that emulation is setting the FP execption flags as per IEEE-754-2008.
There is one set of FP exception flags (used for both binary FP and decimal FP). Given that the <fenv.h> functions work correctly for binary FP exceptions (and they mostly do on Intel x86/x87), then they should work correctly for decimal FP exceptions. The full set of command line options I give gcc is: -std=gnu99 -pedantic -H -fno-builtin -frounding-math My understanding is -frounding-math is supposed to act like a global #pragma STDC FENV_ACCESS ON -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39036
