------- Comment #2 from ubizjak at gmail dot com 2008-06-29 16:45 ------- (In reply to comment #0) > extended.h in soft-fp assumes the size 80bit XFmode is 16byte. > It is only correct for x86-64. For ia32, it is 12byte.
I don't think so. From extended.h: ... #if _FP_W_TYPE_SIZE < 64 union _FP_UNION_E { XFtype flt; struct { #if __BYTE_ORDER == __BIG_ENDIAN unsigned long pad1 : _FP_W_TYPE_SIZE; unsigned long pad2 : (_FP_W_TYPE_SIZE - 1 - _FP_EXPBITS_E); unsigned long sign : 1; unsigned long exp : _FP_EXPBITS_E; unsigned long frac1 : _FP_W_TYPE_SIZE; unsigned long frac0 : _FP_W_TYPE_SIZE; #else unsigned long frac0 : _FP_W_TYPE_SIZE; unsigned long frac1 : _FP_W_TYPE_SIZE; unsigned exp : _FP_EXPBITS_E; unsigned sign : 1; #endif /* not bigendian */ } bits __attribute__((packed)); }; So, the size of the struct is 32+32+15+1 = 80bits. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36667