On Thu, 2006-09-07 at 07:56, Bridge Wu wrote: > Hi Khem, > > Yes, if we use EABI toolchain, the result is always fine regardless of > xscale or iwmmxt. > You mean iwmmxt has its own ABI, which ABI does iwmmxt follow? Are > there documents for iwmmxt like BSABI (ABI for ARM Architecture)? Prior to the EABI iwmmxt had it's own ill-specified ABI which had a number of weird self-inconsistencies. I'd strongly suggest you avoid using that and adopt the EABI instead. R.