------- Comment #6 from joseph at codesourcery dot com 2009-01-30 23:14 ------- Subject: Re: Decimal floating-point exception flags done wrong
On Fri, 30 Jan 2009, tydeman at tybor dot com wrote: > 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. The implementation of decimal FP for the GNU system is partly in GCC and partly in (E)GLIBC (available as patches or an EGLIBC branch). The implementation approach chosen is that the versions of the arithmetic/conversion functions that handle exceptions and rounding modes are included only in the libdfp included with (E)GLIBC, not in libgcc. (Depending on the target, copies of libm functions to handle exceptions and rounding modes may need including in libdfp to avoid a dependency on libm, and this can only be done as part of the libc/libm/libdfp implementation.) So, if you want exceptions and rounding modes support for decimal FP, use an appropriate libc version and link against the associated libdfp. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39036
