mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 1202

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

divw
Assembler Syntax
Definition
Operation
Description
FIELD
FIELD
BIT
BIT
16
0
17
1
18
B
2
Freescale Semiconductor, Inc.
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For More Information On This Product,
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3
divw.
divwo
divwo.
divisor
r D
r B. The 32-bit quotient is formed and placed in r D. The
remainder is not supplied as a result.
Both the operands and the quotient are interpreted as signed
integers. The quotient is the unique signed integer that satisfies
the equation—dividend = (quotient * divisor) + r where 0
|divisor| (if the dividend is non-negative), and –|divisor| < r 0 (if
the dividend is negative).
If an attempt is made to perform any of the divisions—
0x8000_0000
are undefined, as are the contents of the LT, GT, and EQ bits of
the CR0 field (if Rc = 1). In this case, if OE = 1 then OV is set.
The 32-bit signed remainder of dividing the contents of rA by the
contents of rB can be computed as follows, except in the case
that the contents of rA = –231 and the contents of rB = –1.
divw
mullw
subf
divw
Divide Word
dividend
The dividend is the contents of r A. The divisor is the contents of
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MPC823 REFERENCE MANUAL
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dividend
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OE
21
5
( r B)
( r A)
rD,rA,rB (OE = 0 Rc = 0)
rD,rA,rB (OE = 0 Rc = 1)
rD,rA,rB (OE = 1 Rc = 0)
rD,rA,rB (OE = 1 Rc = 1)
r D ,r A ,r B
r D ,r D ,r B
r D ,r D ,r A
22
6
–1or <anything>
divisor
23
7
24
D
8
# r D = quotient
# r D = quotient divisor
# r D = remainder
25
9
491
10
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0—then the contents of r D
MPC823 Instruction Set—divw
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27
12
28
13
29
A
14
30
r <
B-49
RC
15
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