------- Additional Comments From ericw at evcohs dot com 2004-10-19 23:13 ------- Subject: Re: not using qi version of divmod
schlie at comcast dot net wrote: >------- Additional Comments From schlie at comcast dot net 2004-10-19 22:31 ------- >Subject: Re: not using qi version of divmod > >Hi Eric, > >Out of curiosity, what exactly is the 10733 bug, is wrong result computed? > >If so, that implies that divmodhi is broken; otherwise it's not a bug, as >the intermediate (t1 + 40) expression yields an int result, as within the >context of the expression, although t1 is an unsigned char, there's no >guarantee that (t1 + 40) will not overflow an unsigned char size, therefore >properly assumed to be an int; unlike t1 = t1 % 3 or whatever, where all >operands are clearly type compatible with unsigned char, and a valid >optimization. > > Bug #10733 is a wrong-code bug involving the modulus operator on the AVR target. See the bug report itself for more information. Eric -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18065
