tm1300 NXP Semiconductors, tm1300 Datasheet - Page 351

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

Philips Semiconductors
Funnel-shift 3 bytes
SYNTAX
FUNCTION
DESCRIPTION
r src2 and writes the most-significant 32 bits of the shifted result to r dest .
modification of the destination register. If the LSB of r guard is 1, r dest is written; otherwise, r dest is not changed.
EXAMPLES
r30 = 0xaabbccdd, r40 = 0x11223344
r10 = 0, r40 = 0x11223344,
r30 = 0xaabbccdd
r20 = 1, r40 = 0x11223344,
r30 = 0xaabbccdd
As shown below, the
The
[ IF r guard ] funshift3 r src1 r src2
if r guard then
r src1
funshift3
r dest <31:24>
r dest <23:0>
3
Initial Values
2
r src2 <31:8>
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
r src1 <7:0>
funshift3
1
r dest
operation effectively shifts left by three bytes the 64-bit concatenation of r src1 and
3
funshift3 r30 r40
IF r10 funshift3 r40 r30
IF r20 funshift3 r40 r30
7
2
0
r dest
Operation
1
PRODUCT SPECIFICATION
r src2
3
r50
7
r60
r70
2
DSPCPU Operations for TM1300
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r50
no change, since guard is false
r70
funshift1 funshift2 rol
0xdd112233
0x44aabbcc
1
ATTRIBUTES
SEE ALSO
Result
funshift3
7
shifter
101
1, 2
No
—
0
2
1
A-65