PNX1301EH NXP Semiconductors, PNX1301EH Datasheet - Page 422
PNX1301EH
Manufacturer Part Number
PNX1301EH
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1301EH.pdf
(548 pages)
Specifications of PNX1301EH
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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 → rdest
if rguard then
isubi
isubi
rdest ← rsrc1 – n
Initial Values
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 → r70
IF r10 isubi(1) r40 → r80
IF r20 isubi(1) r40 → r90
isubi(15) r50 → r120
isubi(2) r60 → r110
isubi(17) r20 → r120
Operation
PRELIMINARY SPECIFICATION
PNX1300/01/02/11 DSPCPU Operations
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r70 ← 0xe92
no change, since guard is false
r90 ← 0xffffff9b
r120 ← 0x0ff1
r110 ← 0xffffffee
r120 ← 0xfffffff0
isub borrow
ATTRIBUTES
SEE ALSO
Result
1, 2, 3, 4, 5
isubi
0..127
7 bits
alu
32
1
1
A-124
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