Renesas R8C/Tiny Series Software Manual page 91

Chapter 3 Functions
EXTS
[ Syntax ]
EXTS.size dest
[ Operation ]
dest EXT(dest)
[ Function ]
• This instruction sign extends
• If you selected (.B) for the size specifier (.size),
• If you selected (.W) for the size specifier (.size), R0 is sign extended to 32 bits. In this case, R2 is used
for the upper bytes.
[ Selectable dest ]
[ Flag Change ]
Flag U I O
Change
Conditions
S : If you selected (.B) for the size specifier (.size), the flag is set when the operation resulted in MSB
= 1; otherwise cleared. The flag does not change if you selected (.W) for the size specifier (.size).
Z : If you selected (.B) for the size specifier (.size), the flag is set when the operation resulted in 0;
otherwise cleared. The flag does not change if you selected (.W) for the size specifier (.size).
[ Description Example ]
EXTS.B R0L
EXTS.W R0
dest
and stores the result in
B S Z D C
Extend sign
EXTend Sign
[ Instruction Code/Number of Cycles ]
B , W
dest
dest
is sign extended to 16 bits.
R0L/R0
A0/A0
dsp:8[A0]
dsp:16[A0] dsp:16[A1]
dsp:20[A0] dsp:20[A1]
R2R0
74
.
dest
R0H/R1 R1L/R2
A1/A1 [A0]
dsp:8[A1] dsp:8[SB]
dsp:16[SB]
abs20
R3R1 A1A0
3.2 Functions
EXTS
Page=178
R1H/R3
[A1]
dsp:8[FB]
abs16