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PM0044 Datasheet(PDF) 78 Page - STMicroelectronics

No. de pieza PM0044
Descripción Electrónicos  STM8 CPU programming manual
PDF  162 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0044 Datasheet(HTML) 78 Page - STMicroelectronics

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STM8 instruction set
PM0044
78/162
Doc ID 13590 Rev 3
Syntax
ADDW dst,src
e.g. ADDW X,#$1000
Operation
dst <= dst + src
Description
The source (16-bit) is added to the contents of the destination, which is an
index register (X/Y) and the result is stored in the same index register. The
source is a 16-bit memory or data word. The ADDW instruction can also be
used to add an immediate value to the stack pointer (SP).
Instruction overview
V
⇒
(A15.M15 + M15.R15 + R15.A15)
⊕ (A14.M14 + M14.R14 + R14.A14)
Set if the signed operation generates an overflow, cleared otherwise.
H
⇒
X7.M7 + M7.R7 + R7.X7
Set if a carry occurred from bit 7 of the result, cleared otherwise.
N
⇒
R15
Set if bit 15 of the result is set (negative value), cleared otherwise.
Z
⇒
R15.R14.R13.R12.R11.R10.R9.R8.R7.R6.R5.R4.R3.R2.R1.R0
Set if the result is zero (0x0000), cleared otherwise.
C
⇒
X15.M15 + M15.R15 + R15.X15
Set if a carry occurred from bit 15 of the result, cleared otherwise.
Detailed description
See also: ADD, ADC, SUB, SBC, MUL, DIV
ADDW
Word Addition with index registers
ADDW
mnem
dst
src
Affected condition flags
VI1
H
I0
N
Z
C
ADDW
X
Mem
V
-
H
-
N
Z
C
ADDW
Y
Mem
V
-
H
-
N
Z
C
ADDW
SP
Imm
-------
dst
src
Asm
cy
lgth
Op-code(s)
ST7
X
#word
ADDW X,#$1000
2
3
1C
MS
LS
X
longmem
ADDW X,$1000
2
4
72
BB
MS
LS
X
(shortoff,SP)
ADDW X,($10,SP)
2
3
72
FB
XX
Y
#word
ADDW Y,#$1000
2
4
72
A9
MS
LS
Y
longmem
ADDW Y,$1000
2
4
72
B9
MS
LS
Y
(shortoff,SP)
ADDW Y,($10,SP)
2
3
72
F9
XX
SP
#byte
ADDW SP,#$9
2
2
5B
XX



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