Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 723

Double-precision Floating-point Instructions (CS1-H, CJ1-H, CJ1M, or CS1D Only)
Description
Area
EM Area with bank
Indirect DM/EM
addresses in binary
Indirect DM/EM
addresses in BCD
Constants
Data Registers
Index Registers
Indirect addressing
using Index Registers
ACOSD(855) computes the angle (in radians) for a cosine value expressed as
a double-precision (64-bit) floating-point number in words S to S+3 and places
the result in words D to D+3.
(The floating point source data must be in IEEE754 format.)
–1
COS ( S+3 S+2
The source data must be between –1.0 and 1.0. If the absolute value of the
source data exceeds 1.0, an error will occur and the instruction will not be
executed.
The result is output to words D to D+3 as an angle (in radians) within the
range of 0 to .
The following diagram shows the relationship between the input data and
result.
S
En_00000 to En_32764
(n = 0 to C)
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
---
---
---
,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+1 S ) D+3
S: Input data (cosine value)
R
R: Result (radians)
Section 3-16
D
D+2 D+1 D
683