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Individual Instruction Descriptions
4-167
Assembly Language Instructions
4.14.72
SHLSPLS
Shift Left String With Subtract PL
Syntax
[label]
name
dest, src
Clock,
clk
Word,
w
With RPT,
clk
Class
SHLSPLS
A
n, {adrs}
Table 4–46
Table 4–46
1b
SHLSPLS
A
n[~], An[~]
n
S
+3
1
n
R
+3
3
Execution
PH, PL
⇐
src << SV
dest
⇐
dest – PL
PC
⇐
PC + 1
Flags Affected
OF, SF, ZF, CF 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
SHLSPLS A
n, {adrs}
0
1
1
1
0
1
1
A
n
adrs
x
dma16 (for direct) or offset16 (long relative) [see section 4.13]
SHLSPLS A
n[~], An[~]
1
1
1
0
0
1
1
A
n
1
1
1
0
0
0
A~
~A
Description
Shift accumulator string or data memory string pointed by {
adrs} to left n
SV
bits
(as specified by the SV register). This result is zero-filled on the right and either
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. The lower 16 bits of the result PL are subtracted from the
destination accumulator (or its offset). This instruction propagates the shifted
bit to the next accumulator.
Syntax
Description
SHLSPLS A
n, {adrs}
Shift RAM string left, subtract PL from A
n
SHLSPLS A
n[~], An[~]
Shift A
n[~] string left, subtract PL from An[~]
See Also
SHLSPL , SHLTPL , SHLTPLS, SHLAPL, SHLAPLS
Example 4.14.72.1
SHLSPLS A0, *R4++R5
Shift the string pointed by the byte address stored in R4 by n
SV
bits to the left, subtract the shifted value
(PL) from the value in the accumulator string in A0, and store the result in accumulator string A0. Add
R5 to R4 and store result in R4. After execution of the instruction, PH is copied to the next to the last
accumulator of the string.
Example 4.14.72.2
SHLSPLS A2, *R1++
Shift the string pointed by the byte address stored in R1 by n
SV
bits to the left, subtract the shifted value
(PL) from the value in the accumulator string in A2, and store the result in accumulator string A2.
Increment R1 (by 2). After execution of the instruction, PH is copied to the next to the last accumulator
of the string.
Example 4.14.72.3
SHLSPLS A1, A1
Shift the accumulator string A1 by n
SV
bits to the left, subtract the lower 16-bits of shifted value (PL) from
A1, and store the result in A1. After execution PH contains the upper 16 bits of the 32 bit shift.
Summary of Contents for MSP50C614
Page 1: ...MSP50C614 Mixed Signal Processor User s Guide SPSU014 January 2000 Printed on Recycled Paper ...
Page 6: ...vi ...
Page 92: ...3 22 ...
Page 300: ...Instruction Set Summay 4 208 Assembly Language Instructions ...
Page 314: ...Software Emulator 5 14 Figure 5 13 Project Menu Figure 5 14 Project Open Dialog ...
Page 325: ...Software Emulator 5 25 Code Development Tools Figure 5 25 EPROM Programming Dialog ...
Page 331: ...Software Emulator 5 31 Code Development Tools Figure 5 31 Context Sensitive Help System ...
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Page 394: ...7 12 ...
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Page 412: ...Packaging B 10 ...