PNX1301EH/G,557 Trident Microsystems, Inc., PNX1301EH/G,557 Datasheet - Page 329

• Manufacturer Part Number: PNX1301EH/G,557
• Manufacturer: Trident Microsystems, Inc.

Specifications of PNX1301EH/G,557

• Lead Free Status / RoHS Status: Supplier Unconfirmed

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 → rdest
if rguard then {
}
rsrc1
temp ← zero_ext32to64(rsrc1) + zero_ext32to64(rsrc2)
if (unsigned)temp > 0x00000000ffffffff then
else
dspuadd
31
rdest ← 0xffffffff
rdest ← temp<31:0>
32
–1..0] (or [0xffffffff..0]), and stores the clipped value into rdest.
Initial Values
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
31
dspuadd r30 r40 → r60
IF r10 dspuadd r30 r40 → r80
IF r20 dspuadd r30 r40 → r100
dspuadd r50 r90 → r110
dspuadd r70 r80 → r120
0
Clip to [2
Operation
unsigned
unsigned
+
32
–1..0]
rsrc2
31
0
0
Clipped unsigned add
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r60 ← 0x12ff
no change, since guard is false
r100 ← 0x12ff
r110 ← 0xffffffff
r120 ← 0xffffffff
dspiabs dspiadd dspimul
dspisub dspumul dspusub
unsigned
Philips Semiconductors
ATTRIBUTES
SEE ALSO
Result
dspalu
1, 3
No
67
—
0
2
2