PNX1300EH NXP Semiconductors, PNX1300EH Datasheet - Page 322

• Manufacturer Part Number: PNX1300EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1300EH

• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
Clipped signed add
SYNTAX
FUNCTION
DESCRIPTION
range [2
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not changed.
EXAMPLES
r30 = 0x1200, r40 = 0xff
r10 = 0, r30 = 0x1200, r40 = 0xff
r20 = 1, r30 = 0x1200, r40 = 0xff
r50 = 0x7fffffff, r90 = 1
r70 = 0x80000000, r80 = 0xffffffff
As shown below, the
The
[ IF rguard ] dspiadd rsrc1 rsrc2 → rdest
if rguard then {
}
rsrc1
temp ← sign_ext32to64(rsrc1) + sign_ext32to64(rsrc2)
if temp < 0xffffffff80000000 then
else if temp > 0x000000007fffffff then
else
dspiadd
31
rdest ← 0x80000000
rdest ← 0x7fffffff
rdest ← temp
31
–1..–2
Initial Values
31
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
] (or [0x7fffffff..0x80000000]), and stores the clipped value into rdest. All values are signed integers.
dspiadd
Full-precision
33-bit result
signed
rdest
operation computes the sum rsrc1+rsrc2, clips the result into the 32-bit signed
32
31
dspiadd r30 r40 → r60
IF r10 dspiadd r30 r40 → r80
IF r20 dspiadd r30 r40 → r100
dspiadd r50 r90 → r110
dspiadd r70 r80 → r120
0
Clip to [2
Operation
signed
signed
31
+
–1..–2
PRELIMINARY SPECIFICATION
rsrc2
31
31
]
PNX1300/01/02/11 DSPCPU Operations
0
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r60 ← 0x12ff
no change, since guard is false
r100 ← 0x12ff
r110 ← 0x7fffffff
r120 ← 0x80000000
dspiabs dspimul dspisub
dspuadd dspumul dspusub
signed
ATTRIBUTES
SEE ALSO
Result
dspiadd
dspalu
1, 3
No
66
—
0
2
2
A-24