------- Additional Comments From dberlin at gcc dot gnu dot org 2005-03-29 04:58 ------- Subject: Re: unexpected result from floating compare
On Mon, 2005-03-28 at 23:05 +0000, piaget at us dot ibm dot com wrote: > ------- Additional Comments From piaget at us dot ibm dot com 2005-03-28 > 23:05 ------- > 323 compares 2 values across a function call ... somthing a programmer can > reasonably consider. My problem occurs with 2 successive lines of code > admittedly with 2 compares per line). I don't have a problem that the value > of > the variable changes after precision truncation ... but it seems like a bug > that the compiler uses a full precision value for the 1st test and a > truncated > value for the 2nd test (the 2nd test being the next line of C++ code). Except, the value could have been spilled and reloaded from registers between those two source lines, which on x86, is where the problem comes from. The problem is no different simply because the *source* lines happen to be right next to each other. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20674
