In SX Microcontrollers, SX/B Compiler and SX-Key Tool, peterverkaik wrote:

Bean,
I have a function

fmtString FUNC 1,5,5,byte,word,byte,byte,byte

and use it like this:

  sStr = fmtString -128,10,@ascii,7  'value=-128, output="-128",0

This compiles into:


[code]
   823  002D  0C80        MOV __PARAM1,#-128             ;  sStr = fmtString -128,10,@ascii,7           'value=-128, output="-128",0
        002E  0028
   824  002F  0069        CLR __PARAM2                  
   825  0030  0C0A        MOV __PARAM3,#10              
        0031  002A
   826  0032  0C50        MOV __PARAM4,#ascii           
        0033  002B
   827  0034  0C07        MOV __PARAM5,#7               
        0035  002C
   828  0036  0010        CALL @__fmtString             
        0037  0908
   829  0038  0208        MOV sStr,__PARAM1             
        0039  002E 
[/code]SX/B assumes incorrectly that the constant is positive and smaller than 256.
When using

  sStr = fmtString -1280,10,@ascii,7  'value=-1280, output="-1280",0

it compiles into:


[code]
   823  002D  0C00        MOV __PARAM1,#(-1280) & 255    ;  sStr = fmtString -1280,10,@ascii,7          'value=-1280, output="-1280",0
        002E  0028
   824  002F  0CFB        MOV __PARAM2,#(-1280) >> 8    
        0030  0029
   825  0031  0C0A        MOV __PARAM3,#10              
        0032  002A
   826  0033  0C50        MOV __PARAM4,#ascii           
        0034  002B
   827  0035  0C07        MOV __PARAM5,#7               
        0036  002C
   828  0037  0010        CALL @__fmtString             
        0038  0908
   829  0039  0208        MOV sStr,__PARAM1             
        003A  002E 
[/code]This is correct.

The first should be:



[code]
   823  002D  0C00        MOV __PARAM1,#(-128) & 255    ;  sStr = fmtString -1280,10,@ascii,7          'value=-128, output="-128",0
        002E  0028
   824  002F  0CFB        MOV __PARAM2,#(-128) >> 8    
        0030  0029
 
[/code]
regards peter

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