Hi, Friday, 19 March, 2004, 14:10:02, Klaus Hartnegg wrote: [...] > No, programs compiled with Turbo-Pascal 7 with the $G+ option will > use 32 bit registers for longint arithmetic if the program runs on a > 386 cpu or higher. They test the cpu-type on startup and store the Ok, I've found you are right essentially. To be precise though, $G+ have no effect on this, as TP7 compiler itself still generates pure 16-bit code. Math libraries are most probably hand-made and use 32-bit code for intermediate calculations, depending on test8086 variable value. So, when going to use "interrupt" directive one should do "test8086 := 1" before any interrupt ever happen. Nice to learn this. -- Best regards, Nikolai Zhubr > result in the global variable 'test8086'. Longint library functions > test this variable to decide which code to use.
> But the programs do not not save the upper half of the cpu-registers in > interrupt procedures, so if the interrupted main program is in the middle of a > longint calculation and the interrupt procedure uses longint as well, > then the calculation in the main programm can get incorrect results. _______________________________________________ fpc-pascal maillist - [EMAIL PROTECTED] http://lists.freepascal.org/mailman/listinfo/fpc-pascal
