Renesas R8C/Tiny Series Software Manual page 59

Chapter 3 Functions
ADD
[ Syntax ]
ADD.size (:format)
[ Operation ]
dest dest +
[ Function ]
• This instruction adds
dest
• If is an A0 or A1 when the size specifier (.size) you selected is (.B),
perform calculation in 16 bits. If
of the A0 or A1.
dest
• If is a stack pointer when the size specifier (.size) you selected is (.B),
perform calculation in 16 bits.
[ Selectable src/dest ]
R0L/R0 R0H/R1
*1 *1
A0/A0 A1/A1
dsp:8[A0] dsp:8[A1]
dsp:16[A0] dsp:16[A1]
dsp:20[A0] dsp:20[A1]
R2R0 R3R1
*1 If you specify (.B) for the size specifier (.size), you cannot choose A0 or A1 for
*2 Operation is performed on the stack pointer indicated by the U flag. You can choose only #IMM for
[ Flag Change ]
Flag U I O
Change
Conditions
O : The flag is set when a signed operation resulted in exceeding +32767 (.W) or –32768 (.W) or
+127 (.B) or –128 (.B); 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 an unsigned operation resulted in exceeding +65535 (.W) or +255 (.B);
otherwise cleared.
[ Description Example ]
ADD.B A0,R0L
ADD.B R0L,A0
ADD.B Ram:8[SB],R0L
ADD.W #2,[A0]
[ Related Instructions ]
Add without carry
src,dest
src
dest src
and together and stores the result in
src
is an A0 or A1, operation is performed on the eight low-order bits
src
R1L/R2 R1H/R3
[A0] [A1]
dsp:8[SB] dsp:8[FB] dsp:8[A0]
dsp:16[SB] abs16
abs20 #IMM
A1A0
B S Z D C
ADC,ADCF,SBB,SUB
ADDition
[ Instruction Code/Number of Cycles ]
G , Q , S (Can be specified)
B , W
(See the next page for
R0L/R0 R0H/R1
*1
A0/A0 A1/A1
dsp:8[A1]
dsp:16[A0] dsp:16[A1] dsp:16[SB] abs16
dsp:20[A0] dsp:20[A1] abs20
R2R0 R3R1
; A0's 8 low-order bits and R0L are added.
; R0L is zero-expanded and added with A0.
42
3.2
dest
.
src
is zero-expanded to
src
is sign extended to
src dest
/ classified by format.)
dest
R1L/R2 R1H/R3
*1
[A0] [A1]
dsp:8[SB] dsp:8[FB]
SP/SP
A1A0
src dest
and simultaneously.
Functions
ADD
Page=140
*2
src
.