PNX1301 PHILIPS [NXP Semiconductors], PNX1301 Datasheet - Page 448

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

Philips Semiconductors
Unsigned byte-wise quad maximum
SYNTAX
FUNCTION
DESCRIPTION
rsrc1 and rsrc2. All bytes are considered unsigned. The
median computation on packed pixel data structures:
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not changed.
EXAMPLES
r30 = 0x0201000e, r40 = 0xff00ff02
r10 = 0, r60 = 0x9c9c6464, r70 = 0x649d649c
r20 = 1, r60 = 0x9c9c6464, r70 = 0x649d649c
The
MEDIAN_Q(a,b,c) (QUADUMIN( QUADUMAX( QUADUMIN((a),(b)), (c)), QUADUMAX((a),(b))))
The
[ IF rguard ] quadumax rsrc1 rsrc2
if rguard then {
}
rdest<7:0>
rdest<15:8>
rdest<23:16>
rdest<31:24>
quadumax
quadumax
Initial Values
if rsrc1<7:0> > rsrc2<7:0> then rsrc1<7:0> else rsrc2<7:0>
if rsrc1<15:8> > rsrc2<15:8> then rsrc1<15:8> else rsrc2<15:8>
operation computes four separate maximum values of the four pairs of corresponding 8-bit bytes of
if rsrc1<23:16> > rsrc2<23:16> then rsrc1<23:16> else rsrc2<23:16>
if rsrc1<31:24> > rsrc2<31:24> then rsrc1<31:24> else rsrc2<31:24>
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
quadumax r30 r40
IF r10 quadumax r60 r70
IF r20 quadumax r60 r70
rdest
quadumax
Operation
PRELIMINARY SPECIFICATION
PNX1300/01/02/11 DSPCPU Operations
r50
operation is particularly suited to implement
r80
r90
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
imax imin quadumin
r50
no change, since guard is false
r90
ATTRIBUTES
0xff01ff0e
0x9c9d649c
SEE ALSO
quadumax
Result
dspalu
1,3
No
81
—
2
2
A-150