IF statement generates weird code with SNZ instruction

eMAN

Hello,
Ran into a question that has me puzzled...
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I have a program developed for the SX52 (will be a 48 in production) which compares two 8 bit numbers.· One number is declared a byte the other is·a word.·
·[noparse][[/noparse]see attached "vars"]
·When I code the IF statement I use the _LSB of the word to compare with the byte variable.· Needless to say, the code does not work correctly.· The compare fails when the debugger shows me that the subtract yields a 0 and the zero flag is set.
·[noparse][[/noparse]see attached "Debugger screen"]
The generated code (I'm not an expert in SX .. .yet) seems to be weird.· The SNZ instruction is followed by a page instruction then a jump.· It would appear that the code will not operate correctly.
Can you help me understand this?

Using: IDE 3.2.3, SASM 1.51.07, SXB 1.51.03, SXSim 2.08.05
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Thanks for your help,
_______________________________
Don Gille
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Post Edited By Moderator (Chris Savage (Parallax)) : 5/2/2007 9:35:02 PM GMT

JonnyMac

SX/B always precedes program labels with @ to ensure that the program goes where you want it to go without worrying about page boundaries. CJE is for "compare and jump if equal" and your target label is at the end of the command.

Post Edited (JonnyMac) : 5/2/2007 9:32:37 PM GMT

Bean

When a PAGE instruction follows ANY skip instruction, then the instruction after the PAGE is also skipped.

Bean.

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