10 cmp compare two words – Texas Instruments MSP50C614 User Manual
Page 182
Individual Instruction Descriptions
4-90
4.14.10
CMP
Compare Two Words
[label]
name
src, src1 [, mod]
Clock,
clk
Word,
w
With RPT,
clk
Class
CMP
A
n, {adrs}
Table 4–46
Table 4–46
1b
CMP
A
n[~], imm16 [, next A]
2
2
N/R
2b
CMP
CMP
A
n, An~ [, next A]
A
n~, An [, next A]
1
1
n
R
+3
3
CMP
†
R
x, imm16
2
2
N/R
4c
CMP
†
R
x, R5
1
1
n
R
+3
4d
† Does not modify An status
Execution
[premodify AP if
mod specified]
STAT flags set by
src – src1 operation
PC = PC +
w
Flags Affected
src is An:
OF, SF, ZF, CF are set accordingly
src is Rx:
RCF, RZF are set accordingly
src is {adrs}:
TAG bit is set accordingly
Opcode
Instructions
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CMP A
n, {adrs}
0
1
0
1
1
0
0
A
n
adrs
x
dma16 (for direct) or offset16 (long relative) [see section 4.13]
CMP A
n[~], imm16 [, next A]
1
1
1
0
0
next A
A
n
0
1
1
0
0
1
A~
~A
x
imm16
CMP A
n, An~ [, next A]
1
1
1
0
0
next A
A
n
1
0
0
0
0
0
0
0
CMP A
n~, An [, next A]
1
1
1
0
0
next A
A
n
1
0
0
0
0
0
1
0
CMP R
x, imm16
1
1
1
1
1
1
1
0
0
0
1
1
R
x
0
0
x
imm16
CMP R
x, R5
1
1
1
1
1
1
1
0
0
1
1
1
R
x
0
0
Description
Subtract value of
src1 from src (i.e., src–src1) and only modify the status flag.
Premodification of accumulator pointer is allowed with some operand types.
See Also
CMPB, CMPS, J
cc, Ccc
Example 4.14.10.1
CMP A0, *R0
Compare value at accumulator A0 and the content of data memory location pointed by R0 and change
the STAT flags accordingly.
Example 4.14.10.2
CMP A0~, 0x1400, – –A
Predecrement accumulator pointer AP0. Compare value at accumulator A0~ to immediate value at
0x1400 and change the STAT flags accordingly.