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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Special Math Instructions
2
BCNT
BCNT
Applicable Program Areas
Operands
N: Number of words
The number of words must be 0001 to FFFF (1 to 65,535 words).
Operand Specifications
Flags
Function
T
Instruction Mnemonic Variations
Function
code
Function
BIT COUNTER BCNT @BCNT 067
Counts the total number of ON bits in the specified
word(s).
Symbol
BCNT
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description Data type Size
N Number of words UINT 1
S First source word UINT Variable
R Result word UINT 1
Area
Word addresses Indirect DM addresses
Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
N
OK OK OK OK OK OK OK OK OK
OK
--- --- ---
S,R ---
Name Label Operation
Error Flag P_ER • ON if N is 0000.
• ON if result exceeds FFFF.
• OFF in all other cases.
Equals Flag P_EQ • ON if the result is 0000.
• OFF in all other cases.
BCNT(067) counts the total number of bits
that are ON in all words between S and S+(N-
1) and places the result in R.
N: Number of words
S: First source word
R: Result word
BCNT(067)
N
S
R
S+(N–1)
S
R
to
N words
Binary result
Counts the number
of ON bits.