PNX1302EH NXP Semiconductors, PNX1302EH Datasheet - Page 308

• Manufacturer Part Number: PNX1302EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1302EH

• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
Arithmetic shift right
SYNTAX
FUNCTION
DESCRIPTION
amount, and rsrc1 is arithmetically shifted right by this amount. If the rsrc2<31:5> value is not zero, then take this as a
shift by 32 or more bits. The MSB (sign bit) of rsrc1 is replicated as needed to fill vacated bits from the left.
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is unchanged.
EXAMPLES
r30 = 0x7008000f, r20 = 1
r30 = 0x7008000f, r42 = 2
r10 = 0, r30 = 0x7008000f, r44 = 4
r20 = 1, r30 = 0x7008000f, r44 = 4
r40 = 0x80030007, r44 = 4
r30 = 0x7008000f, r45 = 0x1f
r30 = 0x8008000f, r45 = 0x1f
r30 = 0x7008000f, r45 = 0x20
r30 = 0x8008000f, r45 = 0x20
r30 = 0x8008000f, r45 = 0x23
As shown below, the
The
[ IF rguard ] asr rsrc1 rsrc2 → rdest
if rguard then {
}
rsrc1
n ← rsrc2<4:0>
rdest<31:31–n> ← rsrc1<31>
rdest<30–n:0> ← rsrc1<30:n>
if rsrc2<31:5> != 0 {
}
rdest <- rsrc1<31>
S
asr
31
Initial Values
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
Intermediate result
(example: n = 3)
asr
operation takes two arguments, rsrc1 and rsrc2. Rsrc2 specifies an unsigned shift
rdest
asr r30 r20 → r50
asr r30 r42 → r60
IF r10 asr r30 r44 → r70
IF r20 asr r30 r44 → r80
asr r40 r44 → r90
asr r30 r45 → r100
asr r30 r45 → r100
asr r30 r45 → r100
asr r30 r45 → r100
asr r30 r45 → r100
31
S
S
S
S
S
S
28
S
S
0
Operation
Right shifter
32 bits from rsrc1
PRELIMINARY SPECIFICATION
rsrc2
31
PNX1300/01/02/11 DSPCPU Operations
0
asl asli asri lsl lsli lsr
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r50 ← 0x38040007
r60 ← 0x1c020003
no change, since guard is false
r80 ← 0x07008000
r90 ← 0xf8003000
r100 ← 0x00000000
r100 ← 0xffffffff
r100 ← 0x00000000
r100 ← 0xffffffff
r100 ← 0xffffffff
lsri rol roli
ATTRIBUTES
SEE ALSO
rsrc2
Result
shifter
1, 2
No
18
—
2
1
asr
0
A-10