PNX1300EH NXP Semiconductors, PNX1300EH Datasheet - Page 327

• Manufacturer Part Number: PNX1300EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1300EH

• Lead Free Status / RoHS Status: Not Compliant

PNX1300/01/02/11 Data Book
dspimul
SYNTAX
FUNCTION
DESCRIPTION
[2
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not changed.
EXAMPLES
A-29
r30 = 0x10, r40 = 0x20
r10 = 0, r30 = 0x10, r40 = 0x20
r20 = 1, r30 = 0x10, r40 = 0x20
r50 = 0x40000000, r90 = 2
r80 = 0xffffffff
r70 = 0x80000000, r90 = 2
As shown below, the
The
31
[ IF rguard ] dspimul rsrc1 rsrc2 → rdest
if rguard then {
}
rsrc1
Full-precision
–1..–2
64-bit result
temp ← sign_ext32to64(rsrc1) × sign_ext32to64(rsrc2)
if temp < 0xffffffff80000000 then
else if temp > 0x000000007fffffff then
else
dspimul
31
rdest ← 0x80000000
rdest ← 0x7fffffff
rdest ← temp<31:0>
31
Initial Values
] (or [0x7fffffff..0x80000000]), and stores the clipped value into rdest. All values are signed integers.
63
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
PRELIMINARY SPECIFICATION
dspimul
signed
rdest
operation computes the product rsrc1×rsrc2, clips the result into the 32-bit range
31
dspimul r30 r40 → r60
IF r10 dspimul r30 r40 → r80
IF r20 dspimul r30 r40 → r100
dspimul r50 r90 → r110
dspimul r80 r80 → r120
dspimul r70 r90 → r120
0
Clip to [2
Operation
signed
signed
31
×
–1..–2
rsrc2
31
31
]
Clipped signed multiply
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r60 ← 0x200
no change, since guard is false
r100 ← 0x200
r110 ← 0x7fffffff
r120 ← 0x1
r120 ← 0x80000000
dspiabs dspiadd dspisub
dspuadd dspumul dspusub
signed
Philips Semiconductors
ATTRIBUTES
SEE ALSO
Result
0
ifmul
141
2, 3
No
—
0
2
3