71 shls shift left accumulator string to product – Texas Instruments MSP50C6xx User Manual
Page 253
Individual Instruction Descriptions
4-167
Assembly Language Instructions
4.14.71
SHLS
Shift Left Accumulator String to Product
Syntax
[label]
name
dest
Clock, clk
Word, w
With RPT, clk
Class
SHLS
An[~]
n
S
+3
1
n
R
+3
3
Execution
PH, PL
⇐
src << SV
PC
⇐
PC + 1
Flags Affected
OF, SF, ZF, CF are set accordingly
Opcode
Instructions
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SHLS An[~]
1
1
1
0
0
1
1
An
1
1
1
1
1
0
A~
0
Description
Shift accumulator string value left n
SV
bits (as specified by the SV register) into
a ((n
S
+ 2) x 16) -bit result. The result is zero-filled or sign-extended on the left
(based on the setting of the extended sign mode (XM) bit in the status register).
The upper 16 bits are latched into the PH register. Accumulator content is not
changed. The lower 16-bit value is discarded. SHLS instruction can be used
with RPT instructions, but the string length used will be n
S
+ 2.
See Also
SHLS
Example 4.14.71.1
SHLS A0
Shift accumulator string A0 to the left. Accumulator content is not changed. PH contains the upper 16
bits of the shifted result.