tm1300 NXP Semiconductors, tm1300 Datasheet - Page 308

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

TM1300 Data Book
dspiabs
SYNTAX
FUNCTION
DESCRIPTION
first argument zero and second argument equal to the
in assembly source files.)
[0x7fffffff..0]), and stores the clipped value into r dest . All values are signed integers.
modification of the destination register. If the LSB of r guard is 1, r dest is written; otherwise, r dest is not changed.
EXAMPLES
A-22
r30 = 0xffffffff
r10 = 0, r40 = 0x80000001
r20 = 1, r40 = 0x80000001
r50 = 0x80000000
r90 = 0x7fffffff
The
The
The
[ IF r guard ] dspiabs r src1
if r guard then {
}
if r src1 >= 0 then
else if rsrc1 = 0x80000000 then
else
dspiabs
dspiabs
r dest
r dest
r dest
dspiabs
Initial Values
r src1
0x7fffffff
–r src1
operation is a pseudo operation transformed by the scheduler into an h_
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
operation computes the absolute value of rsrc1, clips the result into the range [2
PRODUCT SPECIFICATION
dspiabs r30
IF r10 dspiabs r40
IF r20 dspiabs r40
dspiabs r50
dspiabs r90
r dest
Operation
dspiabs
r60
r80
r110
argument. (Note: pseudo operations cannot be used
r70
r100
Clipped signed absolute value
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r60
no change, since guard is false
r100
r80
r110
h_dspiabs h_dspidualabs
dspiadd dspimul dspisub
dspuadd dspumul dspusub
pseudo-op for h_dspiabs
Philips Semiconductors
0x00000001
0x7fffffff
0x7fffffff
0x7fffffff
dspiabs
ATTRIBUTES
SEE ALSO
Result
with a constant
31
–1..0] (or
dspalu
1, 3
No
65
—
1
2