11 cmpb compare two bytes – Texas Instruments MSP50C614 User Manual
Page 184
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Individual Instruction Descriptions
4-92
4.14.11
CMPB
Compare Two Bytes
Syntax
[label]
name
src, src1
Clock,
clk
Word,
w
With RPT,
clk
Class
CMPB
A
n, imm8
1
1
N/R
2a
CMPB
R
x, imm8
1
1
N/R
4b
Execution
status flags set by
src – src1 byte
PC
⇐
PC + 1
Flags Affected
src is An:
OF, SF, ZF, CF are set accordingly
src is Rx:
RCF, RZF are set accordingly
Opcode
Instructions
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CMPB A
n, imm8
1
0
1
0
0
1
1
A
n
imm8
CMPB R
x, imm8
1
0
1
1
1
1
k4
k3
k2
k7
k6
k5
R
x
k1
k0
Description
Subtract value of
src1 (zero filled in upper 8 bits) from src (i.e., src–src1) and
only modify the status flags. Contents of
src not changed.
See Also
CMP, CMPS, J
cc, Ccc
Example 4.14.11.1
CMPB A0, 0xf3
Compare immediate value 0xf3 to accumulator A0.
Example 4.14.11.2
CMPB R3, 0x21
Compare immediate value 0x21 to R3.
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