PNX1301 PHILIPS [NXP Semiconductors], PNX1301 Datasheet - Page 422

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

Philips Semiconductors
Subtract with immediate
SYNTAX
FUNCTION
DESCRIPTION
the result in rdest. The value of n must be between 0 and 127, inclusive.
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is unchanged.
EXAMPLES
r30 = 0xf11
r10 = 0, r40 = 0xffffff9c
r20 = 1, r40 = 0xffffff9c
r50 = 0x1000
r60 = 0xfffffff0
r20 = 1
The
The
[ IF rguard ] isubi(n) rsrc1
if rguard then
isubi
isubi
rdest
Initial Values
rsrc1 – n
operation computes the difference of a single argument in rsrc1 and an immediate modifier n and stores
operations optionally take a guard, specified in rguard. If a guard is present, its LSB controls the
isubi(127) r30
IF r10 isubi(1) r40
IF r20 isubi(1) r40
isubi(15) r50
isubi(2) r60
isubi(17) r20
rdest
Operation
r110
r120
r120
r70
PRELIMINARY SPECIFICATION
r80
r90
PNX1300/01/02/11 DSPCPU Operations
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r70
no change, since guard is false
r90
r120
r110
r120
0xe92
0xffffff9b
0x0ff1
0xffffffee
0xfffffff0
isub borrow
ATTRIBUTES
SEE ALSO
Result
1, 2, 3, 4, 5
isubi
0..127
7 bits
alu
32
1
1
A-124