PNX1301 PHILIPS [NXP Semiconductors], PNX1301 Datasheet - Page 440
PNX1301
Manufacturer Part Number
PNX1301
Description
Media Processors
Manufacturer
PHILIPS [NXP Semiconductors]
Datasheet
1.PNX1301.pdf
(548 pages)
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Pack most-significant 16 bits
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
r30 = 0x12345678, r40 = 0xaabbccdd
r10 = 0, r40 = 0xaabbccdd, r30 = 0x12345678
r20 = 1, r40 = 0xaabbccdd, r30 = 0x12345678
As shown below, the
The
[ IF rguard ] pack16msb rsrc1 rsrc2
if rguard then {
}
rsrc1
pack16msb
31
rdest<15:0>
rdest<31:16>
Initial Values
rsrc2<31:16>
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
rsrc1<31:16>
pack16msb
15
rdest
31
operation packs the two most-significant halfwords from the arguments rsrc1 and
pack16msb r30 r40
IF r10 pack16msb r40 r30
IF r20 pack16msb r40 r30
0
rdest
15
Operation
PRELIMINARY SPECIFICATION
rsrc2
31
PNX1300/01/02/11 DSPCPU Operations
r50
0
r60
r70
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
pack16lsb packbytes
r50
no change, since guard is false
r70
mergelsb mergemsb
15
pack16msb
ATTRIBUTES
0x1234aabb
0xaabb1234
SEE ALSO
Result
1, 2, 3, 4, 5
alu
No
54
—
0
2
1
A-142
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