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Re:Intel x86 documentation has more pages than the 6502 has ... by userbinator on Thursday December 08, 2016 @07:30AM (#13129891)
The barrel shifter is not as useful as you would think (what fraction of instructions are shl or shr?)

https://news.ycombinator.com/item?id=7045759

Re:Intel x86 documentation has more pages than the 6502 has ... by pcwalton on Thursday December 08, 2016 @01:00PM (#13132442)
The immediate value encoding is still there. What's gone is the barrel shifter on arithmetic instructions, other than those that explicitly mention that they perform a shift.