------- Additional Comments From zhangyijin_2008 at 163 dot com 2004-11-23 11:39 ------- (In reply to comment #4) > I agree that this is a bug, and I think it's been fixed now for gcc-4.x, but I'm > not going to attempt to back-port the fix to the branch, given the possible > work-around outlined below. > The reason for the 'bug' is that the ep9312 hardware floating point unit has a > different floating point layout from that used by Linux, and the -mcpu=ep9312 > flag is changing the ABI to match the hardware (that's incorrect, -mcpu flags > must not change the ABI). > WORKAROUND: The ep9312 is based on the ARM9 core, so you can get best 'integer' > code by using -mcpu=arm9. > If you want good floating point performance you will have to do a lot more work: > this will involve porting both the compiler and glibc (plus some applications > that are ARM floating-point aware) to use the ep9312. You will likely encounter > many more bugs on the way at this stage, so I recommend you don't attempt this > yet (there is work underway to produce a new ABI for ARM linux that will make > support for the ep9312 much easier).
thanks. Now I try to rebuild glibc,if it still can not run well,I must use softfloat first. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18620
