658
Double-precision Floating-point Instructions (CS1-H, CJ1-H, CJ1M, or CS1D Only) Section 3-16
Description FIXD(841) converts the integer portion of the double-precision (64-bit) float-
ing-point number in words S to S+3 (IEEE754-format) to 16-bit signed binary
data and places the result in D.
Only the integer portion of the floating-point data is converted, and the fraction
portion is truncated. The integer portion of the floating-point data must be
within the range of –32,768 to 32,767.
Example conversions:
A floating-point value of 3.5 is converted to 3.
A floating-point value of –3.5 is converted to –3.
Flags
3-16-2 DOUBLE FLOATING TO 32-BIT: FIXLD(842)
Purpose Converts a double-precision (64-bit) floating-point value to 32-bit signed
binary data and places the result in the specified result words.
This instruction is supported by CS1-H, CJ1-H, CJ1M, and CS1D CPU Units
only.
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
S+3CH SCH
DCH
S+1CHS+2CH
Floating-point data (64 bits)
Signed binary data (16 bits)
Name Label Operation
Error Flag ER ON if the source data (S to S+3) is not a number (NaN).
ON if the integer portion of the source data (S to S+3) is
not within the range of –32,768 to 32,767.
OFF in all other cases.
Equals Flag = ON if the result is 0000.
OFF in all other cases.
Negative Flag N ON if bit 15 of the result is ON.
OFF in all other cases.
FIXDL(842)
S
D
S: First source word
D: First destination word
Variations Executed Each Cycle for ON Condition FIXLD(842)
Executed Once for Upward Differentiation @FIXLD(842)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area S D
CIO Area CIO 0000 to CIO 6140 CIO 0000 to CIO 6142
Work Area W000 to W508 W000 to W510
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