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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Hi.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>I know that I am usually wrong about this but this
looks like a compiler bug to me. Please have look.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>ppgAcDiff and acGain are signed short.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>This simple line didn’t do anything so I
checked the assembler. Actually this is very similar to my previous problem but
this time the variable is used at the line right after. Just to provoke, I
inserted a simple ++ in between and yes, now the result is saved. What is going
on here?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>ppgAcDiff = ppgAcDiff/acGain;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>411: ppgAcDiff = ppgAcDiff/acGain;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+0000020D: <st1:metricconverter ProductID="019C"
w:st="on">019C</st1:metricconverter> MOVW R18,R24 Copy
register pair<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+0000020E: 0187 MOVW R16,R14
Copy register pair<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+0000020F: 940E0A68 CALL 0x00000A68
Call subroutine<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>414: subtractTotalDiffFiltered =
S_ShortFilter(ppgAcDiff, &filtMem[channel], filterdjup,
&firFiltMem[channel]);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>411: ppgAcDiff = ppgAcDiff/acGain;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+0000020D: <st1:metricconverter ProductID="019C"
w:st="on">019C</st1:metricconverter> MOVW R18,R24 Copy
register pair<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+0000020E: 0187 MOVW R16,R14
Copy register pair<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+0000020F: 940E0A6D CALL 0x00000A6D
Call subroutine<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+00000211: 0178 MOVW R14,R16
Copy register pair<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>412: ppgAcDiff++;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+00000212: 01C7 MOVW R24,R14
Copy register pair<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+00000213: 9601 ADIW R24,0x01 Add
immediate to word<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+00000214: <st1:metricconverter ProductID="017C"
w:st="on">017C</st1:metricconverter> MOVW R14,R24 Copy
register pair<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>414: subtractTotalDiffFiltered =
S_ShortFilter(ppgAcDiff, &filtMem[channel], filterdjup,
&firFiltMem[channel]);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>/Bengt<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>________________________________________________________________<o:p></o:p></span></font></p>
<p style='margin:0cm;margin-bottom:.0001pt'><st1:PersonName
ProductID="Bengt Ragnemalm" w:st="on"><font size=3 face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt'>Bengt Ragnemalm</span></font></st1:PersonName> <span
lang=EN-GB>Tel +46 13 22 24 97<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
lang=EN-GB style='font-size:10.0pt'>Research engineer FAX:
+46 13 10 19 02<o:p></o:p></span></font></p>
<p style='margin:0cm;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Linköpings Universitet </span></font><font
size=2><span lang=EN-GB style='font-size:10.0pt'><a
href="mailto:bengt.ragnemalm@imt.liu.se"><font size=3><span lang=SV
style='font-size:12.0pt'>mailto:bengt.ragnemalm@imt.liu.se</span></font></a></span></font><font
size=2><span style='font-size:10.0pt'><o:p></o:p></span></font></p>
<p style='margin:0cm;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Inst. för Medicinsk Teknik Internet: </span></font><font
size=2><span lang=EN-GB style='font-size:10.0pt'><a
href="http://www.imt.liu.se/"><font size=3 color=purple><span lang=SV
style='font-size:12.0pt;color:purple'>http://www.imt.liu.se</span></font></a></span></font><font
size=2><span style='font-size:10.0pt'><o:p></o:p></span></font></p>
<p style='margin:0cm;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
lang=EN-GB style='font-size:10.0pt'>S-581 85 Linköping <st1:country-region
w:st="on"><st1:place w:st="on">SWEDEN</st1:place></st1:country-region><o:p></o:p></span></font></p>
<p style='margin:0cm;margin-bottom:.0001pt'><font size=3 face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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