PNX1301 PHILIPS [NXP Semiconductors], PNX1301 Datasheet - Page 307

• Manufacturer Part Number: PNX1301
• Description: Media Processors
• Manufacturer: PHILIPS [NXP Semiconductors]

PNX1300/01/02/11 Data Book
asli
SYNTAX
FUNCTION
DESCRIPTION
result in rdest equal to rsrc1 arithmetically shifted left by n bits. The value of n must be between 0 and 31, inclusive.
Zeros are shifted into the LSBs of rdest while the MSBs shifted out of r s rc1 are lost.
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is unchanged.
EXAMPLES
A-9
r60 = 0x20
r10 = 0, r60 = 0x20
r20 = 1, r60 = 0x20
r70 = 0xfffffffc
r80 = 0xe
As shown below, the
The
[ IF rguard ] asli(n) rsrc1
if rguard then {
}
asli
rdest<31:n>
rdest<n–1:0>
Initial Values
operations optionally take a guard, specified in rguard. If a guard is present, its LSB controls the
Intermediate result
(example: n = 3)
rsrc1<31–n:0>
0
asli
PRELIMINARY SPECIFICATION
operation takes a single argument in rsrc1 and an immediate modifier n and produces a
rsrc1
rdest
asli(3) r60
IF r10 asli(3) r60
IF r20 asli(3) r60
asli(2) r70
asli(30) r80
31
31
rdest
32 bits from rsrc1
Operation
Left shifter
r90
r120
r125
r100
r110
Arithmetic shift left immediate
3
0
0
0
0
0
0
0
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
asl asr asri lsl lsli lsr
r90
no change, since guard is false
r110
r120
r125
Shift amount n
from operation modifier
Philips Semiconductors
0x100
0x100
0xfffffff0
0x80000000
lsri rol roli
ATTRIBUTES
SEE ALSO
Result
shifter
7 bits
0..31
1, 2
11
1
1