Omron CJ1G-CPUxx, Instructions Manual

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588
Double-precision Floating-point Instructions (CS1-H, CJ1-H, CJ1M, or CS1D Only)
Section 3-16
Description
*
D(847) multiplies the double-precision (64-bit) floating-point number in words
Md to Md+3 by the double-precision (64-bit) floating-point number in words Mr
to Mr+3 and places the result in words D to D+3. (The floating point data must
be in IEEE754 format.)
If the absolute value of the result is greater than the maximum value that can
be expressed as floating-point data, the Overflow Flag will turn ON and the
result will be output as
±∞
.
If the absolute value of the result is less than the minimum value that can be
expressed as floating-point data, the Underflow Flag will turn ON and the
result will be output as 0.
The various combinations of multiplicand and multiplier data will produce the
results shown in the following table.
Note 1. The results could be zero (including underflows), a numeral, +
∞
, or –
∞
.
2. The Error Flag will be turned ON and the instruction won’t be executed.
EM Area without bank E00000 to E32764
EM Area with bank 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 ---
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
Area Md Mr D
Multiplicand
Multiplier 0 Numeral +
∞
–
∞
NaN
0 0 0 See note 2. See note 2.
Numeral 0 See note 1. +/–
∞
+/–
∞
+
∞
See note 2. +/–
∞
+
∞
–
∞
–
∞
See note 2 +/–
∞
–
∞
+
∞
NaN See note 2.
S1+1CH
S2+1CH
×
S1CH
S2CH
D+1CH DCH
S1+2CH
S2+2CH
D+2CH
S1+3CH
S2+3CH
D+3CH
Result (floating-point data, 64-bits)
Multiplier (floating-point data, 64-bits)
Multiplicand (floating-point data, 64-bits)