Marcin, I am ansewering to you in this thread: No, R16 and R17 are ok for my cpu, but not correct from OS prospecive. I've spent a sleepless night with playing with registers against definitions in macros.asm (it seems Registers 10,11,12,13, are not used by OS but in reality code crashes) and the preliminary result is:
\ ----- Test AvrAsm ----- \ : loadtos, 16 Y+ ld, 17 Y+ ld, ; \ define macro \ : savetos, -Y 17 st, -Y 16 st, ; \ tosl=r22, tosh=r23 : loadtos, 24 Y+ ld, 25 Y+ ld, ; \ define macro : savetos, -Y 25 st, -Y 24 st, ; \ tosl=r22, tosh=r23 code dup_ savetos, end-code \ insert asm code code drop_ loadtos, end-code code ++_ \ ( x1 x2 x3 -- x4 ) R18 push, R19 push, \ R24 push, \ R25 push, R18 0 ldi, R19 0 ldi, R24 Y+ ld, R25 Y+ ld, R18 R24 add, R19 R25 adc, R24 Y+ ld, R25 Y+ ld, R18 R24 add, R19 R25 adc, R24 Y+ ld, R25 Y+ ld, R18 R24 add, R19 R25 adc, R24 R18 mov, R25 R19 mov, \ R24 255 ldi, \ R25 128 ldi, -Y R25 st, -Y R24 st, \ R25 pop, \ R24 pop, R19 pop, R18 pop, end-code > 100 200 300 ++_ ok > .s 0 16381 28171 ok > 100 200 300 ++_ ok > .s 0 16379 28471 1 16381 28471 ok > > 100 dup_ ok > .s 0 16379 100 1 16381 100 ok > 300 dup_ ok > .s 0 16375 300 1 16377 300 2 16379 100 3 16381 100 ok > drop_ ok > .s 0 16377 300 1 16379 100 2 16381 100 ok > drop_ drop_ drop_ ok > .s ok > The loadtos and savetos works somehow, but I am not able to run ++_ My current understanding is something still overwrites registers used. Based on used set of registers the results vary. It would be nice to have a list (or a brief Guide) which Registers one may use in such assembler run within forth. Pito ----- PŮVODNÍ ZPRÁVA ----- Od: "pito" <[email protected]> Komu: [email protected], [email protected] Předmět: [Amforth-devel] Assembler - initial issues or bug Datum: 8.9.2010 - 1:52:22 > Hi, I started with LP asm (amforth 4.0): > \ ----- Test AvrAsm ----- > : loadtos, 16 Y+ ld, 17 Y+ ld, ; \ define macro > : savetos, -Y 17 st, -Y 16 st, ; \ tosl=r22, > tosh=r23 > > code dup_ savetos, end-code \ insert asm code > code drop_ loadtos, end-code > > and I get: > > 10 dup_ > ok > > .s > 0 16379 10 > 1 16381 9546 > ok > > 20 dup_ > ok > > .s > 0 16375 20 > 1 16377 9546 > 2 16379 10 > 3 16381 9546 > ok > > drop_ drop_ > ok > > .s > 0 16379 20 > 1 16381 9546 > ok > > > > the ++_ demo crashes... Any help, new update, or I > did something > wrong (I loaded assembler.frt of course). P. > > > ------------------------------------------------------------------------------ > > This SF.net Dev2Dev email is sponsored by: > > Show off your parallel programming skills. > Enter the Intel(R) Threading Challenge 2010. > http://p.sf.net/sfu/intel-thread-sfd > _______________________________________________ > Amforth-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/amforth-devel ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ Amforth-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/amforth-devel
