Renesas R8C/Tiny Series Software Manual page 84

Chapter 3 Functions
DEC
[ Syntax ]
DEC.size dest
[ Operation ]
dest dest –
[ Function ]
• This instruction decrements
[ Selectable dest ]
[ Flag Change ]
Flag
U I O B
Change
Conditions
S : The flag is set when the operation results in MSB = 1; otherwise cleared.
Z : The flag is set when the operation results in 0; otherwise cleared.
[ Description Example ]
DEC.W A0
DEC.B R0L
[ Related Instructions ]
Rev.2.00 Oct 17, 2005
REJ09B0001-0200
1
dest
by 1 and stores the result in
S Z D C
INC
page 66 of 263
Decrement
DECrement
[ Instruction Code/Number of Cycles ]
B , W
R0L *1 R0H
abs16 *1 A0
*1 Only (.B) can be specified as the size specifier (.size).
*2 Only (.W) can be specified as the size specifier (.size).
3.2 Functions
dest
.
dest
*1 dsp:8[SB] *1
*2 A1 *2
DEC
Page: 169
dsp:8[FB] *1