Am 29.06.21 um 00:38 schrieb Basil Hussain: > > If you are adding these attribute keywords, would it then be possible to > have one to dictate, per function, the use of the old purely-stack-based > calling convention? I think this would be a good idea for the sake of > backwards compatibility, so that existing inline assembly code does not > have to be rewritten just to compile under the new version.
When in the future the new calling convention is made the default in trunk, a way to indicate the use of the old calling convention (maybe __sdccoldcall or so) will be introduced to use the old calling convention for individual functions. Maybe __sdccoldcall, __stackcall or something like that. >> callee. In the current convention, the cleanup is always done by the >> caller. The caller vs callee-cleanup is the aspect that I am still a bit >> unsure of. While this makes a differnce, the pciture was not that clear >> initally. > > Can I clarify my understanding here? Callee-cleanup will have the called > function rewind the stack pointer for any arguments that were passed on > the stack. So, the caller will still push args onto the stack as before, > but the callee will be responsible for clearing them off the stack? And > the caller will not need to do anything after the called function > returns. Am I correct? Yes. > > I have a tangential question: does any of this work make it easier to > implement the callee-saves option/pragma for STM8? These are unrelated. Philipp _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
