662
Double-precision Floating-point Instructions (CS1-H, CJ1-H, CJ1M, or CS1D Only) Section 3-16
Applicable Program Areas
Operand Specifications
Description DBLL(844) converts the 32-bit signed binary value in S+1 and S to double-
precision (64-bit) floating-point data (IEEE754-format) and places the result in
words D to D+3. A single 0 is added after the decimal point in the floating-
point result.
Signed binary data within the range of –2,147,483,648 to 2,147,483,647 can
be specified for S+1 and S. The floating point value has 24 significant binary
digits (bits). The result will not be exact if a number greater than 16,777,215
(the maximum value that can be expressed in 24-bits) is converted by
DBLL(844).
Example Conversions:
A signed binary value of 16,777,215 is converted to 16,777,215.0.
A signed binary value of –16,777,215 is converted to –15,777,215.0.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area S D
CIO Area CIO 0000 to CIO 6142 CIO 0000 to CIO 6140
Work Area W000 to W510 W000 to W508
Holding Bit Area H000 to H510 H000 to H508
Auxiliary Bit Area A000 to A958 A448 to A956
Timer Area T0000 to T4094 T0000 to T4092
Counter Area C0000 to C4094 C0000 to C4092
DM Area D00000 to D32766 D00000 to D32764
EM Area without bank E00000 to E32766 E00000 to E32764
EM Area with bank En_00000 to En_32766
(n = 0 to C)
En_00000 to En_32764
(n= 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants #00000000 to #FFFFFFFF
(binary)
---
Data Registers ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
S+1CH
D+1CH
SCH
DCHD+2CHD+3CH
Floating-point data (64 bits)
Signed binary data (32 bits)
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