OpenCores
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l.add, l.addc, l.addi and l.addic do not correctly set the carry flag in Or1ksim #92
Closed jeremybennett opened this issue over 14 years ago
jeremybennett commented over 14 years ago
<p> Under some circumstances, the add instructions do not correctly set the carry flag. </p> <p> Reported in <em>Implementation and Verification of a CPU Subsystem for Multimode RF Transceivers</em> by Waqas Ahmed of the Royal Institute of Technology, Sweden. Full details of when this error occurs can be found in section 5.5.3 (the criteria are complex). </p> <p> Jeremy </p> <p> -- <br /> Tel: +44 (1590) 610184<br /> Cell: +44 (7970) 676050<br /> SkypeID: jeremybennett<br /> Email: <a href="mailto:jeremy.bennett@embecosm.com">jeremy.bennett@embecosm.com</a><br /> Web: <a href="http://www.embecosm.com">www.embecosm.com</a> </p>
jeremybennett was assigned over 14 years ago
jeremybennett commented over 14 years ago
<p> Corrected in top of tree. Regression tests added. </p> <p> Marking closed. </p> <p> Jeremy </p>
jeremybennett closed this over 14 years ago

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jeremybennett
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