I tried but ... > __ucmpsi2 is a function which does an unsigned comparison of two 32-bit > integers. You can get gcc to build that by compiling libgcc2.c with GCC is able to compare unsigned 32-int in normal programs (out of libgcc). > LIBGCC2_UNITS_PER_WORD defined as 2. If your processor has a carry If I define LIBGCC2_UNITS_PER_WORD as 2 then I get /home/guest1/tam16/lib/gcc/tam16/4.3.3/libgcc.a(_addsub_df.o): In function `_fpadd_parts': /home/guest1/gcc/new_build/tam16/libgcc/../.././gcc/dp-bit.c:670: undefined reference to `__ucmpdi2' /home/guest1/gcc/new_build/tam16/libgcc/../.././gcc/dp-bit.c:675: undefined reference to `__ucmpdi2' Plus, in both case (LIBGCC2_UNITS_PER_WORD as 2 or as 4), __ucmpsi2 or __ucmpdi2 is not called in _fpadd_parts. I checked by disassembling libgcc.a. And in the second case, float operation do not work. There are wrong memory accesses. Once, I managed to have float operations working well by changing the macros definitions a lot and rebuilding each time. That is why I think the problem is about macros settings. > flag, it will often be more efficient to provide an insn which does it, > these days typically via cbranchsi4. Noted. Thank you for your reply. Regards, Florent.
