tm1300 NXP Semiconductors, tm1300 Datasheet - Page 409
tm1300
Manufacturer Part Number
tm1300
Description
Tm-1300 Media Processor
Manufacturer
NXP Semiconductors
Datasheet
1.TM1300.pdf
(533 pages)
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Philips Semiconductors
Subtract with immediate
SYNTAX
FUNCTION
DESCRIPTION
the result in r dest . The value of n must be between 0 and 127, inclusive.
modification of the destination register. If the LSB of r guard is 1, r dest is written; otherwise, r dest is unchanged.
EXAMPLES
r30 = 0xf11
r10 = 0, r40 = 0xffffff9c
r20 = 1, r40 = 0xffffff9c
r50 = 0x1000
r60 = 0xfffffff0
r20 = 1
The
The
[ IF r guard ] isubi( n ) r src1
if r guard then
isubi
isubi
r dest
Initial Values
r src1 – n
operation computes the difference of a single argument in r src1 and an immediate modifier n and stores
operations optionally take a guard, specified in r guard . 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
r dest
Operation
r110
r120
r120
r70
PRODUCT SPECIFICATION
r80
r90
DSPCPU Operations for TM1300
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-123
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