523
3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Double-precision Floating-point Instructions
3
DBL/DBLL
DBL/DBLL
Applicable Program Areas
Operands
îš„ Operand Specifications
•DBL
•DBLL
Flags
Instruction Mnemonic Variations
Function
code
Function
16-BIT TO DOUBLE FLOATING DBL @DBL 843
Converts a 16-bit signed binary value to double-
precision (64-bit) floating-point data and places
the result in the specified destination words.
32-BIT TO DOUBLE FLOATING DBLL @DBLL 844
Converts a double-precision (64-bit) floating-point
value to 32-bit signed binary data and places the
result in the specified result words.
Symbol
DBL DBLL
Area
Function block
definitions
Block program areas Step program areas Subroutines Interrupt tasks
SFC action or
transition programs
Usage OK OK OK OK OK OK
Operand Description
Data type Size
DBL DBLL DBL DBLL
S
DBL: Source word
DBLL: First source word
INT DINT 1 2
D First destination word LREAL LREAL 4 4
Area
Word addresses
Indirect DM/EM
addresses
Con-
stants
Registers Flags
Pulse
bits
TR
bits
CIO WR HR AR T C DM EM
@DM
@EM
*DM
*EM
DR IR
Indirect
using IR
TK CF
S
OK OK OK OK OK OK OK OK OK OK
OK OK
--- OK --- --- --- ---
D --- ---
Area
Word addresses
Indirect DM/EM
addresses
Con-
stants
Registers Flags
Pulse
bits
TR
bits
CIO WR HR AR T C DM EM
@DM
@EM
*DM
*EM
DR IR
Indirect
using IR
TK CF
S
OK OK OK OK OK OK OK OK OK OK
OK
--- --- OK --- --- --- ---
D ---
Name Label Operation
Error Flag P_ER OFF
Equals Flag P_EQ • ON if both the exponent and mantissa of the result are 0.
• OFF in all other cases.
Negative Flag P_N • ON if the result is negative.
• OFF in all other cases.
S: Source word
D: First destination word
DBL(843)
S
D
DBLL(844)
S
D
S: First Source word
D: First destination word
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