dfp.c uses the sig field to store encoded value and only uses access
routines in libdecnumber to manipulate it so that dfp.c can be encoding
neutral. But there are
659 decimal128 *d128;
660 *r = *op0;
661 d128 = (decimal128 *) r->sig;
662 /* Flip high bit. */
663 d128->bytes[0] ^= 1 << 7;
664 /* Keep sign field in sync. */
665 r->sign ^= 1;
671 decimal128 *d128;
672 *r = *op0;
673 d128 = (decimal128 *) r->sig;
674 /* Clear high bit. */
675 d128->bytes[0] &= 0x7f;
676 /* Keep sign field in sync. */
677 r->sign = 0;
714 if (sign)
715 r->sig[0] |= 0x80000000;
They won't work with BID encoding.
--
Summary: dfp.c assumes DPD encoding
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: other
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl at lucon dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30530
