Indeed. Dynamic shifting was microcoded (not uop!) on the power pc for gen3. However shifting with immediate values was not. This leads to all sorts of strange

Indeed. Dynamic shifting was microcoded (not uop!) on the power pc for gen3. However shifting with immediate values was not. This leads to all sorts of strange performance workarounds. Mike Acton refers to it here: https://macton.smugmug.com/Other/2008-07-15-by-Eye-Fi/n-xmKDH/i-BbZPR2r/A https://macton.smugmug.com/Other/2008-07-15-by-Eye-Fi/n-xmKD...