dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 496

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

INC.BP
Operation:
D + 1 → D
Description: Increment a byte value in memory. The value is internally sign extended to 20 bits before being incre-
Usage:
Example:
Explanation of Example:
Condition Codes Affected:
A-152
Before Execution
Addresses
Byte
mented. The low-order 8 bits of the result are stored back to memory. The condition codes are calcu-
lated based on the 8-bit result, with the exception of the E and U bits, which are calculated based on
the 20-bit result. Absolute addresses are expressed as byte addresses. The result is not affected by the
state of the saturation bit (SA).
This instruction is typically used when integer data is processed.
INC.BP X:$3065
Prior to execution, the value at byte address X:$3065 is $00. Execution of the INC.BP instruction in-
crements this value by one and generates the result $01. Note that this address is equivalent to the upper
byte of word address $1832.
E
U
N
Z
V
C
LF
15
— Set if the extension portion of the 20-bit result is in use
— Set if the 20-bit result is unnormalized
— Set if bit 7 of the result is set
— Set if the result is zero
— Set if overflow has occurred in result
— Set if a carry occurs from bit 7 of the result
(no parallel move)
$3068
$3066
$3064
$3062
P4
14
SR
13
P3
7
88
66
00
22
X Memory
Increment Byte (Byte Pointer)
P2
12
MR
0300
DSP56800E Core Reference Manual
0
P1
11
7
77
55
33
11
P0
10
0
; increment the byte at (byte) address $3065
I1
9
INC.BP
Assembler Syntax:
I0
8
SZ
7
After Execution
Addresses
6
L
Byte
5
E
D
U
4
CCR
$3068
$3066
$3064
$3062
SR
N
3
(no parallel move)
7
2
Z
88
66
01
22
X Memory
Freescale Semiconductor
0310
V
1
0
7
C
0
77
55
33
11
INC.BP
0