Bit Left Shift - Mitsubishi Electric R16MTCPU Programming Manual

Bit left shift: <<
Format
(S1) << (S2)
Setting data
■Usable data
: Usable
Setting Usable Data
data
Bit Word device
device
16-bit
integer
type
 
(S1)
 
(S2)
■Description, data type of result
Setting data Description
(S1) Data to be left-shifted
(S2) Number of left shifts
Processing details
• The data specified with (S1) is shifted to the left by the number of times specified with (S2).
• 0 enters the least significant bit of the left shift result.
• When (S1) is a 16-bit integer type and (S2) is a negative number or not less than 16, the result is 0.
• When (S1) is a 32-bit integer type and (S2) is a negative number or not less than 32, the result is 0.
Operation error
An operation error will occur if:
• (S1) or (S2) is an indirectly specified device and its device No. is outside the range.
Program example
■Program which shifts #0 one bit position to the left and substitutes the result to D0
D0 = #0 << K1
b15
D0 0 1 0 0 1 0 1 0 0 1 1 0 1 0 0 0
Number of basic steps
7
Constant
32-bit 64-bit 16-bit
integer floating integer
type (L) point type
type (F) (K/H)
  
  
b0 b15
#0 0 0 0 0 0 0 0 1
Usable steps
F/FS

Calculation
expression
32-bit 64-bit
integer floating
type point
(K/H, L) type (K)
  
  
b0
1 1 1 1 1 0 0 0
4 OPERATION CONTROL PROGRAMS
G

Bit Comparison
conditional conditional
expression expression
 
 
Data type of result
Data type of (S1) (Integer type)
4.6 Bit Operations
4
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