96
3.2 Functions
Chapter 3 Functions
NEGate
Two’s complement
[ Syntax ]
NEG.size
dest
[ Flag Change ]
[ Description Example ]
[ Related Instructions ]
NOT
[ Function ]
NEG
NEG
dest
R0L/R0
R0H/R1
R1L/R2
R1H/R3
A0/
A0
A1/
A1
[A0]
[A1]
dsp:8[A0]
dsp:8[A1]
dsp:8[SB]
dsp:8[FB]
dsp:16[A0] dsp:16[A1]
dsp:16[SB]
abs16
dsp:20[A0] dsp:20[A1]
abs20
R2R0
R3R1
A1A0
B , W
[ Operation ]
dest 0 – dest
NEG.B
R0L
NEG.W
A1
U
I
O
B
S
Z
D
C
Conditions
O :
The flag is set when
dest
before the operation is –128 (.B) or –32768 (.W); otherwise cleared.
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 set when the operation resulted in 0; otherwise cleared.
• This instruction takes the 2’s complement of
dest
and stores the result in
dest
.
[ Instruction Code/Number of Cycles ]
Page=207
[ Selectable dest ]
Flag
Change
Summary of Contents for R8C/Tiny Series
Page 50: ...Chapter 3 Functions 3 1 Guide to This Chapter 3 2 Functions...
Page 151: ...134 Chapter 3 Functions 3 2 Functions Blank for page layout...
Page 278: ...Chapter 6 Calculation Number of Cycles 6 1 Instruction queue buffer...
Page 297: ...R8C Tiny Series Software Manual 2 6 2 Ote machi Chiyoda ku Tokyo 100 0004 Japan...