pjwitte via Ql-Users wrote: > If you want a really miserable Christmas, you could try the following > - without saving your work first: > > 1 x% = 32000 > 2 y% = x% > 3 z% = 1600 > 4 t = x% * y% * z%: REMark Kaboooom!!! > 5 PRINT "-<GROAN>- Im dead!"
Nice find and, as usual, good repro, thanks. As good as TT's code usually is, here he has used too many "magic numbers" instead of speaking EQU symbols and promptly used the wrong number (6 instead of 8) when calculating a code offset. I will send Wolgang the fix for the next release. What's happening: 1. "x% * y%" is "int16 * int16" and results in an "int32" 2. Then z% in "* z%" is promoted to "int32" so the operation is "int32 * int32" 3. It checks if the result will overflow, which it will in this case, so the operands are converted to "float" and it retries again using the "float * float" code path 4. But the code to retry jumps back into the "int32 * int32" path instead of the "float * float" path and hilarity ensues. This path has never worked since the dawn of SBasic :-o > The above crashes SMSQ/E 3.32 on QPC2 and SMSQmulator! Even the > four-finger reset wont work. The following is, as youd expect, fine: > > 1 x% = 32000 > 2 y% = x% > 3 z% = 1600 > 4 t = x% * y% > 5 t = t * z% > 6 PRINT "Yippi! - Im still alive!" "t" is float in this case, so "t * z%" is "float * int16". In this case z% is promoted into a float, so the operation is "float * float" from the start and everything is happy. Marcel _______________________________________________ QL-Users Mailing List
