PNX1311EH NXP Semiconductors, PNX1311EH Datasheet - Page 480

• Manufacturer Part Number: PNX1311EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1311EH

• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
IEEE status flags from convert unsigned integer
to floating-point with rounding toward zero
SYNTAX
FUNCTION
DESCRIPTION
integer in rsrc1 to a single-precision IEEE floating-point value, and an integer bit vector representing the computed
exception flags is written into rdest. The bit vector stored in rdest has the same format as the IEEE exception bits in
the PCSW. The exception flags in PCSW are left unchanged by this operation. Rounding is performed toward zero;
the IEEE rounding mode bits in PCSW are ignored.
controls the modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not
changed.
EXAMPLES
r30 = 3
r40 = 0xffffffff (4294967295)
r10 = 0, r50 = 0xfffffffd
r20 = 1, r50 = 0xfffffffd
r60 = 0x7fffffff (2147483647)
r70 = 0x80000000 (2147483648)
r80 = 0x7ffffff1 (2147483633)
The
The
[ IF rguard ] ufloatrzflags rsrc1 → rdest
if rguard then
rdest ← ieee_flags((float) ((unsigned long)rsrc1))
ufloatrzflags
ufloatrzflags
31
0
Initial Values
operation computes the IEEE exceptions that would result from converting the unsigned
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB
ufloatrzflags r30 → r100
ufloatrzflags r40 → r105
IF r10 ufloatrzflags r50 → r110
IF r20 ufloatrzflags r50 → r115
ufloatrzflags r60 → r117
ufloatrzflags r70 → r120
ufloatrzflags r80 → r122
Operation
PRELIMINARY SPECIFICATION
7
0
OFZ
6
PNX1300/01/02/11 DSPCPU Operations
IFZ
5
INV
4
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
ufloatflags ifloatrzflags
r100 ← 0
r105 ← 0x02 (INX)
no change, since guard is false
r115 ← 0x02 (INX)
r117 ← 0x02 (INX)
r120 ← 0
r122 ← 0x02 (INX)
OVF
ufloatrz ifloatflags
3
ufloatrzflags
UNF
ATTRIBUTES
2
SEE ALSO
Result
INX
1
DBZ
0
falu
120
1, 4
No
—
1
3
A-182