Hitachi NJI-350B - Manual (Page 139)

Chapter 5 Instruction Specifications
5-89
Item number Application instructions-17 Name Absolute value
Ladder format Condition code Processing time ( µs) Remark
R7F4 R7F3 R7F2 R7F1 R7F0 Average Maximum
ABS (d, s) DER ERR SD V C Upper case: W
z z z z ↕ 30  Lower case: DW
Instruction format Number of steps
Condition Steps
ABS (d, s) Word 3 4 
Double word 4
Bit Word Double word
Usable I/O
X Y
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM C
onstant Other
d
I/O after absolute value is
taken
{ { { {
s
I/O before absolute value
is taken
{ { { { { { { {
Function
• Given s is signed, set the absolute value of s in d.
• If s is positive or 0: The content of s is set to d. C (R7F0) is set to “0.”
• If s is negative: Two's complements of the contents of s are set in d. C (R7F0) is set to “1.”
• Perform with d and s as both words or both double words.
ABS (WR0000, WM0000)
R000 DIF0
(When the value of WM is positive or 0)
WM0000 = H4C1A
0 1 0 0 1 1 0 0 0 0 0 1 1 0 1 0 WM0000
s
0
R7F0
d s
0 1 0 0 1 1 0 0 0 0 0 1 1 0 1 0 WR0000
d
0
(When the value of WM is negative)
WM0000 = HCC1A
1 1 0 0 1 1 0 0 0 0 0 1 1 0 1 0 WM0000
s
0
d s+1
R7F0
WR0000
d
1
0 0 1 1 0 0 1 1 1 1 1 0 0 1 0 1
0 0 1 1 0 0 1 1 1 1 1 0 0 1 1 0
1 +
Example:
• When s is a word: 0 to 32767 (decimal) correspond to H000 to H7FFF (hexadecimal).
−32768 to −1(decimal) correspond to H8000 to HFFFF (hexadecimal).
• When s is a double word: 0 to 2147483647 (decimal) correspond to H00000000 to H7FFFFFFF (hexadecimal).
−2147483648 to −1 (decimal) correspond to H80000000 to HFFFFFFFF (hexadecimal).
Notes
• Use edge trigger as the startup condition for this instruction.
AB
S (
d,
s)