OpenRISC 1000
l.xori uses signed immediate #109
Closed jeremybennett opened this issue almost 14 years ago
jeremybennett commented almost 14 years ago
<p>
Unlike the other logical instructions (<tt>l.andi</tt>, <tt>l.ori</tt>), <tt>l.xori</tt> sign extends its immediate operand.
</p>
<p>
There appears to be no justification for this. It is probably a transcription error in the architecture manual.
</p>
<p>
The architecture manual needs to be corrected, and the implementations in Or1ksim and Verilog checked to ensure they match.
</p>
<p>
Jeremy
</p>
<p>
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</p>
jeremybennett commented almost 14 years ago
<p>
Fixed in supplementary architecture manual.
</p>
<p>
Marking closed.
</p>
<p>
Jeremy
</p>
jeremybennett closed this almost 14 years ago
rherveille commented almost 14 years ago
Currently Binutils uses signed-extend as well. So this means a change to binutils too.
Richard
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