PNX1301 PHILIPS [NXP Semiconductors], PNX1301 Datasheet - Page 329

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

PNX1300/01/02/11 Data Book
dspuadd
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
A-31
r30 = 0x1200, r40 = 0xff
r10 = 0, r30 = 0x1200, r40 = 0xff
r20 = 1, r30 = 0x1200, r40 = 0xff
r50 = 0xffffffff, r90 = 1
r70 = 0x80000001, r80 = 0x7fffffff
As shown below, the
The
[ IF rguard ] dspuadd rsrc1 rsrc2
if rguard then {
}
rsrc1
temp
if (unsigned)temp > 0x00000000ffffffff then
else
dspuadd
31
rdest
rdest
32
–1..0] (or [0xffffffff..0]), and stores the clipped value into rdest.
Initial Values
zero_ext32to64(rsrc1) + zero_ext32to64(rsrc2)
0xffffffff
temp<31:0>
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
PRELIMINARY SPECIFICATION
dspuadd
Full-precision
unsigned
33-bit result
rdest
operation computes unsigned sum rsrc1+rsrc2, clips the result into the unsigned
32
dspuadd r30 r40
IF r10 dspuadd r30 r40
IF r20 dspuadd r30 r40
dspuadd r50 r90
dspuadd r70 r80
31
0
rdest
Clip to [2
Operation
unsigned
unsigned
32
–1..0]
rsrc2
r60
r110
r120
31
r80
r100
0
0
Clipped unsigned add
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r60
no change, since guard is false
r100
r110
r120
dspiabs dspiadd dspimul
dspisub dspumul dspusub
unsigned
Philips Semiconductors
0x12ff
0x12ff
0xffffffff
0xffffffff
ATTRIBUTES
SEE ALSO
Result
dspalu
1, 3
No
67
—
0
2
2