marian Szczepkowski wrote: > We are looking at GCC and another compiler for use on an embedded > powerpc project and in comparing the two compilers I get this, > >>From GCC > lis 9,pstr@ha > lwz 0,pstr@l(9) > mr 3,0 > crxor 6,6,6 > bl atoi > mr 29,3 > >>From vendor > 172 lwz r3, 532(r31) > 173 bl atof > 174 bl _d_dtof > 175 stw r3, 12(sp) > > > GCC appears to be doing some extra work here and I am at a loss to work > out what it is doing this for, why the crxor 6,6,6 from my reading this > is the floating point exception in the CR, and GCC does this every time, > as here... > > lwz 3,8(31) > lis 9,.LC1@ha > la 4,.LC1@l(9) > mr 5,29 > mr 6,0 > crxor 6,6,6 > bl sprintf > > Can some one explain this seemingly irrelevant extra step.. Can you supply a small test case that generates this code? Andrew.
