Johan Råde wrote:
Let's see if you can break it!
OK, I can break it on HP aCC with: maddock@td176> aCC -AA -Ofaster -I../ -I ~ *.cpp maddock@td176> ./a.out Testing float Assertion failed: (fpclassify)(x) == FP_SUBNORMAL, file test.cpp, line 122 ABORT instruction (core dumped) However the docs for -Ofaster do indicate that denorms don't work correctly, so it may be that problem here :-) g++ on HP-UX looks OK. On Linux/IA64, with Intel C++ 9.1 maddock@td178.testdrive.hp.com> icc -O3 -I.. -I ~ *.cpp -static maddock@td178.testdrive.hp.com> ./a.out Testing float a.out: test.cpp:139: void <unnamed>::test_basic() [with T = float]: Assertion `(fpclassify)(x) == FP_SUBNORMAL' failed. Aborted Intel on IA32 looks OK, though I didn't try very hard to break things :-) And I couldn't find an AMD64 machine with Intel for EM64 installed to test on. Regards, John.