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MC68340 データシート(PDF) 157 Page - Freescale Semiconductor, Inc

部品番号 MC68340
部品情報  Integrated Processor with DMA User?셲 Manual
PDF  441 Pages
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メーカー  FREESCALE [Freescale Semiconductor, Inc]
ホームページ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC68340 データシート(HTML) 157 Page - Freescale Semiconductor, Inc

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5- 20
MC68340 USER’S MANUAL
MOTOROLA
5.3.3.1 CONDITION CODE REGISTER. The CCR portion of the SR contains five bits that
indicate the result of a processor operation. Table 5-3 lists the effect of each instruction on
these bits. The carry bit and the multiprecision extend bit are separate in the M68000
Family to simplify programming techniques that use them. Refer to Table 5-7 as an
example.
Table 5-3. Condition Code Computations
Operations
X
N
Z
V
C
Special Definition
ABCD
*
U
?
U
?
C = Decimal Carry
Z = Z
Λ R
∂Λ ... Λ R0
ADD, ADDI, ADDQ
*
*
*
?
?
V = Sm
Λ Dm Λ R
∂ V S∂ Λ D∂ Λ Rm
C = Sm
Λ Dm V R
∂ Λ Dm V Sm Λ R∂
ADDX
*
*
?
?
?
V = Sm
Λ Dm Λ R
∂ V S∂ Λ D∂ Λ Rm
C = Sm
Λ Dm V R
∂ Λ Dm V Sm Λ R∂
Z = Z
Λ R
∂ Λ ... Λ R0
AND, ANDI, EOR, EORI,
MOVEQ, MOVE, OR,
ORI, CLR, EXT, NOT,
TAS, TST
—
*
*
0
0
CHK
—
*
U
U
U
CHK2, CMP2
—
U
?
U
?
Z = (R = LB) V
(R = UB)
C = (LB < UB)
Λ (IR < LB) V (R > UB) V
(UB < LB) Λ (R > UB) Λ (R < LB)
SUB, SUBI, SUBQ
*
*
*
?
?
V =
S
∂ Λ Dm Λ R∂ V Sm Λ D∂ Λ Rm
C = Sm
Λ D
∂ V Rm Λ D∂ V Sm Λ Rm
SUBX
*
*
?
?
?
V =
S
∂ Λ Dm Λ R∂ V Sm Λ D∂ Λ Rm
C = Sm
Λ D
∂ V Rm Λ D∂ V Sm Λ Rm
Z = Z
Λ R
∂ Λ ... Λ R0
CMP, CMPI, CMPM
—
*
*
?
?
V =
S
∂ Λ Dm Λ R∂ V Sm Λ D∂ Λ Rm
C = Sm
Λ D
∂ V Rm Λ D∂ V Sm Λ Rm
DIVS, DIVU
—
*
*
?
0
V = Division Overflow
MULS, MULU
—
*
*
?
0
V = Multiplication Overflow
SBCD, NBCD
*
U
?
U
?
C = Decimal Borrow
Z = Z
Λ R
∂ Λ ... Λ R0
NEG
*
*
*
?
?
V = Dm
Λ Rm
C = Dm V Rm
NEGX
*
*
?
?
?
V = Dm
Λ Rm
C = Dm V Rm
Z = Z
Λ R
∂ Λ ... Λ R0
ASL
*
*
*
?
?
V = Dm
Λ (D
∂ – 1 V ... V D∂ – r) V D∂ Λ
(Dm–1 V
... + Dm – r)
C =
D
∂ – r + 1
ASL (r = 0)
—
*
*
0
0
LSL, ROXL
***0
?
C = Dm – r + 1
LSR (r = 0)
—
*
*
0
0
ROXL (r = 0)
—
*
*
0
?
C = X
ROL
—
*
*
0
?
C = Dm – r + 1
ROL (r = 0)
—
*
*
0
0
ASR, LSR, ROXR
***0
?
C = Dr – 1
ASR, LSR (r = 0)
—
*
*
0
0
ROXR (r = 0)
—
*
*
0
?
C = X
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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