PNX1300 Philips, PNX1300 Datasheet - Page 439

• Manufacturer Part Number: PNX1300
• Description: Media Processors
• Manufacturer: Philips

PNX1300/01/02/11 Data Book
pack16lsb
SYNTAX
FUNCTION
DESCRIPTION
rsrc2 into rdest. The halfword from rsrc1 is packed into the most-significant halfword of rdest; the halfword from rsrc2
is packed into the least-significant halfword of rdest.
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is unchanged.
EXAMPLES
A-141
r30 = 0x12345678, r40 = 0xaabbccdd
r10 = 0, r40 = 0xaabbccdd, r30 = 0x12345678
r20 = 1, r40 = 0xaabbccdd, r30 = 0x12345678
As shown below, the
The
[ IF rguard ] pack16lsb rsrc1 rsrc2
if rguard then {
}
rsrc1
pack16lsb
31
rdest<15:0>
rdest<31:16>
Initial Values
rsrc2<15:0>
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
rsrc1<15:0>
pack16lsb
PRELIMINARY SPECIFICATION
15
rdest
31
operation packs the two least-significant halfwords from the arguments rsrc1 and
pack16lsb r30 r40
IF r10 pack16lsb r40 r30
IF r20 pack16lsb r40 r30
0
rdest
Pack least-significant 16-bit halfwords
15
Operation
rsrc2
31
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
15
ATTRIBUTES
0x5678ccdd
0xccdd5678
SEE ALSO
Result
1, 2, 3, 4, 5
alu
No
53
—
0
2
1