PNX1300EH NXP Semiconductors, PNX1300EH Datasheet - Page 474

• Manufacturer Part Number: PNX1300EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1300EH

• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
IEEE status flags from convert floating-point to
unsigned integer using PCSW rounding mode
SYNTAX
FUNCTION
DESCRIPTION
precision IEEE floating-point value in rsrc1 to an unsigned integer, 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
according to the IEEE rounding mode bits in PCSW. If an argument is denormalized, zero is substituted before
computing the conversion, and the IFZ bit in the result is set.
controls the modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not
changed.
EXAMPLES
r30 = 0x40400000 (3.0)
r35 = 0x40247ae1 (2.57)
r10 = 0,
r40 = 0xff4fffff (–3.402823466e+38)
r20 = 1,
r40 = 0xff4fffff (–3.402823466e+38)
r45 = 0x7f800000 (+INF))
r50 = 0xbfc147ae (-1.51)
r60 = 0x00400000 (5.877471754e-39)
r70 = 0xffffffff (QNaN)
r80 = 0xffbfffff (SNaN)
The
The
[ IF rguard ] ufixieeeflags rsrc1 → rdest
if rguard then
rdest ← ieee_flags((unsigned long) ((float)rsrc1))
ufixieeeflags
ufixieeeflags
31
0
Initial Values
operation computes the IEEE exceptions that would result from converting the single-
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB
ufixieeeflags r30 → r100
ufixieeeflags r35 → r102
IF r10 ufixieeeflags r40 → r105
IF r20 ufixieeeflags r40 → r110
ufixieeeflags r45 → r112
ufixieeeflags r50 → r115
ufixieeeflags r60 → r117
ufixieeeflags r70 → r120
ufixieeeflags 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
r100 ← 0
r102 ← 0x02 (INX)
no change, since guard is false
r110 ← 0x10 (INV)
r112 ← 0x10 (INV)
r115 ← 0x10 (INV)
r117 ← 0x20 (IFZ)
r120 ← 0x10 (INV)
r122 ← 0x10 (INV)
ifixrzflags ufixrzflags
ufixieee ifixieeeflags
OVF
3
ufixieeeflags
UNF
ATTRIBUTES
2
SEE ALSO
Result
INX
1
DBZ
0
falu
124
1, 4
No
—
1
3
A-176