tm1300 NXP Semiconductors, tm1300 Datasheet - Page 424

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

TM1300 Data Book
mergemsb
SYNTAX
FUNCTION
DESCRIPTION
r src1 and r src2 into r dest . The second-most-significant byte from r src2 is packed into the least-significant byte of
r dest ; the second-most-significant byte from r src1 is packed into the second-least-significant byte of r dest ; the most-
significant byte from r src2 is packed into the second-most-significant byte of r dest ; and the most-significant byte from
r src1 is packed into the most-significant byte 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-138
r30 = 0x12345678, r40 = 0xaabbccdd
r10 = 0, r40 = 0xaabbccdd, r30 = 0x12345678
r20 = 1, r40 = 0xaabbccdd, r30 = 0x12345678
As shown below, the
The
[ IF r guard ] mergemsb r src1 r src2
if r guard then {
}
r src1
mergemsb
r dest <7:0>
r dest <15:8>
r dest <23:16>
r dest <31:24>
3
Initial Values
2
r src2 <23:15>
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
r src1 <23:15>
r src2 <31:24>
r src1 <31:24>
mergemsb
PRODUCT SPECIFICATION
1
r dest
operation interleaves the two pairs of most-significant bytes from the arguments
3
7
mergemsb r30 r40
IF r10 mergemsb r40 r30
IF r20 mergemsb r40 r30
2
0
r dest
1
Operation
r src2
3
7
r50
Merge most-significant byte
2
r60
r70
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
pack16lsb pack16msb
packbytes mergelsb
r50
no change, since guard is false
r70
Philips Semiconductors
1
ATTRIBUTES
0x12aa34bb
0xaa12bb34
SEE ALSO
Result
7
1, 2, 3, 4, 5
alu
No
58
—
0
2
1