<Example> If SF is set for the operation unit of the instruction code, 2 words of data
are included in DT.
1.234567
1.234567
Destination
Source
DT0-DT1
DT10-DT11
DT 0 DT 10MV.SF
2.7.5 DF Double-precision floating point real number constant
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Format for double-precision floating point
● Following IEEE754 format, the double precision floating point format consists of 1 sign bit, 11
exponential bits, and 52 mantissa bits.
● Operation instructions for processing real numbers and conversion instructions for real
number integers are provided by default, so it is not necessary to worry about data format
while programming.
16 15 0
Mantissa portion
52 bits
32 3148 4751526263
Exponent
portion
■
Range of double-precision floating point real number constants
Operation Available range
64-bit operation
Negative range: -2.2250738585072014E-308 to -1.7976931348623158E+308
0
Positive range: +2.2250738585072014E-308 to +1.7976931348623158E+308
■
Storage area for double-precision floating point real number constants
● For the storage area for data of real numbers converted using the operation instructions for
double-precision floating point real number constants, 1 unit of data uses an area of 4 words
(64 bits).
● When using the storage area for real number data in data transfer instructions or other
instructions, input DF for the operation unit.
2.7 Explanation of constants
2-44 WUME-FP7CPUPGR-12
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