2 ms·
Shifts were not always fast. These old hacker news comments contain the details: https://news.ycombinator.com/item?id=2962770 https://news.ycombinator.com/item
by bhouston 2y ago
Shifts were not always fast. These old hacker news comments contain the details: https://news.ycombinator.com/item?id=2962770 https://news.ycombinator.com/item?id=2962770
- petermcneeley 2y agoIndeed. 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...