Functions - Renesas R8C/Tiny Series Software Manual

Chapter 3

Functions

ABS
[ Syntax ]
ABS.size dest
[ Operation ]
dest dest
[ Function ]
• This instruction takes on an absolute value of
[ Selectable dest ]
[ Flag Change ]
Flag U I O
Change
Conditions
O : The flag is set (= 1) when dest before the operation is –128 (.B) or –32768 (.W); otherwise cleared (= 0).
S : The flag is set when the operation resulted in MSB = 1; otherwise cleared.
Z : The flag is set when the operation resulted in 0; otherwise cleared.
C : The flag is indeterminate.
[ Description Example ]
ABS.B R0L
ABS.W A0
B , W
B S Z D C
Absolute value
ABSolute
[ Instruction Code/Number of Cycles ]
dest
and stores it in
R0L/R0 R0H/R1
A0/A0 A1/A1
dsp:8[A0] dsp:8[A1]
dsp:16[A0] dsp:16[A1]
dsp:20[A0] dsp:20[A1]
R2R0 R3R1
39
3.2
dest
.
dest
R1L/R2 R1H/R3
[A0] [A1]
dsp:8[SB] dsp:8[FB]
dsp:16[SB] abs16
abs20
A1A0
Functions
ABS
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