535
3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Double-precision Floating-point Instructions
3
ASIND/ACOSD/ATAND
ASIND/ACOSD/ATAND
Applicable Program Areas
Operands
îš„ Operand Specifications
Flags
Instruction Mnemonic Variations
Function
code
Function
DOUBLE ARC SINE ASIND @ASIND 854
Calculates the arc sine of a double-precision (64-
bit) floating-point number and places the result in
the specified destination words.
DOUBLE ARC COSINE ACOSD @ACOSD 855
Calculates the arc cosine of a double-precision
(64-bit) floating-point number and places the result
in the specified result words.
DOUBLE ARC TANGENT ATAND @ATAND 856
Calculates the arc tangent of a double-precision
(64-bit) floating-point number and places the result
in the specified result words.
Symbol
ASIND ACOSD ATAND
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
S First source word LREAL 4
D First destination word LREAL 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 --- --- --- ---
D
Name Label Operation
Error Flag P_ER • ON if the source data is not recognized as floating-point data.
• ASIND
•ON if the source data is not a number (NaN).
•ON if the absolute value of the source data exceeds 1.0.
•ACOSD
•ON if the source data is not a number (NaN).
•ON if the absolute value of the source data exceeds 1.0.
•ATAND
•ON if the source data is not a number (NaN).
•OFF in all other cases.
Equals Flag P_EQ • ON if both the exponent and mantissa of the result are 0.
• OFF in all other cases.
Overflow Flag P_OF Unchanged
Underflow Flag P_UF Unchanged
Negative Flag P_N • ASIND, ATAND
•ON if the result is negative.
•OFF in all other cases.
•ACOSD
Unchanged
S: First source word
ASIND(854)
S
D
D: First destination
word
ACOSD(855)
S
D
S: First source word
D: First destination
word
ATAND(856)
S
D
S: First source word
D: First destination
word
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