tm1300 NXP Semiconductors, tm1300 Datasheet - Page 419

• Manufacturer Part Number: tm1300
• Description: Tm-1300 Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Logical shift left immediate
pseudo-op for asli
SYNTAX
FUNCTION
DESCRIPTION
argument and opcode modifier. (Note: pseudo operations cannot be used in assembly source files.)
result in r dest equal to r src1 logically shifted left by n bits. The value of n must be between 0 and 31, inclusive. Zeros
are shifted into the LSBs of r dest while the MSBs shifted out of r src1 are lost.
modification of the destination register. If the LSB of r guard is 1, r dest is written; otherwise, r dest is unchanged.
EXAMPLES
r60 = 0x20
r10 = 0, r60 = 0x20
r20 = 1, r60 = 0x20
r70 = 0xfffffffc
r80 = 0xe
The
As shown below, the
The
[ IF r guard ] lsli( n ) r src1
if r guard then {
}
lsli
lsli
r dest <31: n >
r dest < n –1:0>
Initial Values
operation is a pseudo operation that is transformed by the scheduler into an
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
Intermediate result
(example: n = 3)
r src1 <31– n :0>
0
lsli
operation takes a single argument in r src1 and an immediate modifier n and produces a
r src1
r dest
lsli(3) r60
IF r10 lsli(3) r60
IF r20 lsli(3) r60
lsli(2) r70
lsli(30) r80
3
3
r dest
32 bits from r src1
Operation
Left shifter
r90
r120
r125
PRODUCT SPECIFICATION
r100
r110
3
r90
no change, since guard is false
r110
r120
r125
0
0
DSPCPU Operations for TM1300
0
0
0
0
0
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
asl asli asr asri lsl lsr
0x100
0x100
0xfffffff0
0x80000000
Shift amount n
from operation modifier
lsri rol roli
ATTRIBUTES
SEE ALSO
Result
asli
with the same
shifter
7 bits
0..31
1, 2
11
1
1
A-133
lsli