tm1300 NXP Semiconductors, tm1300 Datasheet - Page 426

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

TM1300 Data Book
pack16lsb
SYNTAX
FUNCTION
DESCRIPTION
r src2 into r dest . The halfword from r src1 is packed into the most-significant halfword of r dest ; the halfword from r src2
is packed into the least-significant halfword of r dest .
modification of the destination register. If the LSB of r guard is 1, r dest is written; otherwise, r dest is unchanged.
EXAMPLES
A-140
r30 = 0x12345678, r40 = 0xaabbccdd
r10 = 0, r40 = 0xaabbccdd, r30 = 0x12345678
r20 = 1, r40 = 0xaabbccdd, r30 = 0x12345678
As shown below, the
The
[ IF r guard ] pack16lsb r src1 r src2
if r guard then {
}
r src1
pack16lsb
r dest <15:0>
r dest <31:16>
3
Initial Values
r src2 <15:0>
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
r src1 <15:0>
pack16lsb
PRODUCT SPECIFICATION
1
r dest
3
operation packs the two least-significant halfwords from the arguments r src1 and
pack16lsb r30 r40
IF r10 pack16lsb r40 r30
IF r20 pack16lsb r40 r30
0
r dest
Pack least-significant 16-bit halfwords
1
Operation
r src2
3
r50
0
r60
r70
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
pack16msb packbytes
r50
no change, since guard is false
r70
mergelsb mergemsb
Philips Semiconductors
1
ATTRIBUTES
0x5678ccdd
0xccdd5678
SEE ALSO
Result
1, 2, 3, 4, 5
alu
No
53
—
0
2
1