4–32 Alpha Architecture Handbook
4.4.8 Count Population
Format:
Operation:
temp = 0
FOR i FROM 0 TO 63
IF { Rbv<i> EQ 1 } THEN temp = temp + 1
END
Rc<6:0> ← temp<6:0>
Rc<63:7> ← 0
Exceptions:
Instruction mnemonics:
Qualifiers:
Description:
The number of ones in Rb is written to Rc. Ra must be R31.
CTPOP Rb.rq,Rc.wq
! Operate format
None
CTPOP Count Population
None