tm1300 NXP Semiconductors, tm1300 Datasheet - Page 418

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

TM1300 Data Book
lsl
SYNTAX
FUNCTION
DESCRIPTION
(Note: pseudo operations cannot be used in assembly source files.)
and rdest is set to r src1 logically shifted left by this amount. If the rsrc2<31:5> value is not zero, then take this as a
shift by 32 or more bits. 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
A-132
r60 = 0x20, r30 = 3
r10 = 0, r60 = 0x20, r30 = 3
r20 = 1, r60 = 0x20, r30 = 3
r70 = 0xfffffffc, r40 = 2
r80 = 0xe, r50 = 0xfffffffe
r30 = 0x7008000f, r45 = 0x20
r30 = 0x8008000f, r45 = 0x80000000
r30 = 0x8008000f, r45 = 0x23
The
As shown below, the
The
[ IF r guard ] lsl r src1 r src2
if r guard then {
}
r src1
n
r dest <31:n>
r dest <n–1:0>
if rsrc2<31:5> != 0 {
}
lsl
rdest <- 0
lsl
31
r src2 <4:0>
operation is a pseudo operation that is transformed by the scheduler into an
Initial Values
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
Intermediate result
r src1 <31–n:0>
0
(example: n = 3)
lsl
PRODUCT SPECIFICATION
operation takes two arguments, r src1 and r src2 . R src2 specify an unsigned shift amount,
r dest
lsl r60 r30
IF r10 lsl r60 r30
IF r20 lsl r60 r30
lsl r70 r40
lsl r80 r50
lsl r30 r45
lsl r30 r45
lsl r30 r45
3
r dest
32 bits from r src1
Operation
0
Left shifter
r90
r120
r125
r100
r100
r100
r src2
r100
r110
31
r90
no change, since guard is false
r110
r120
r125
r100
r100
r100
3
0
0
0
0
0x100
0
0
0
0x100
0xfffffff0
0x00000000 (shift by more than 32))
0x00000000
0x00000000
0x00000000
asl asli asr asri lsli lsr
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
asl
Philips Semiconductors
lsri rol roli
Logical shift left
with the same arguments.
ATTRIBUTES
Result
SEE ALSO
r src2
pseudo-op for asl
shifter
1, 2
No
0
19
—
2
1