PNX1300 Philips, PNX1300 Datasheet - Page 391

• Manufacturer Part Number: PNX1300
• Description: Media Processors
• Manufacturer: Philips

PNX1300/01/02/11 Data Book
ifloatflags
SYNTAX
FUNCTION
DESCRIPTION
in rsrc1 to a single-precision IEEE floating-point value, and an integer bit vector representing the computed exception
flags is written into r dest. 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.
the modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not changed.
EXAMPLES
A-93
r30 = 3
r40 = 0xffffffff (-1)
r10 = 0, r50 = 0xfffffffd
r20 = 1, r50 = 0xfffffffd
r60 = 0x7fffffff (2147483647)
r70 = 0x80000000 (-2147483648)
r80 = 0x7ffffff1 (2147483633)
The
The
[ IF rguard ] ifloatflags rsrc1
if rguard then
rdest
ifloatflags
ifloatflags
31
0
Initial Values
ieee_flags((float) ((long)rsrc1))
PRELIMINARY SPECIFICATION
operation computes the IEEE exceptions that would result from converting the signed integer
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls
ifloatflags r30
ifloatflags r40
IF r10 ifloatflags r50
IF r20 ifloatflags r50
ifloatflags r60
ifloatflags r70
ifloatflags r80
IEEE status flags from convert signed integer to
rdest
Operation
7
0
r100
r105
r117
r120
r122
OFZ
6
r110
r115
IFZ
5
INV
4
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
ufloatflags ufloatrzflags
r100
r105
no change, since guard is false
r115
r117
r120
r122
OVF
ifloat ifloatrzflags
3
Philips Semiconductors
0
0
0
0x02 (INX)
0
0x02 (INX)
UNF
ATTRIBUTES
2
SEE ALSO
floating-point
Result
INX
1
DBZ
0
falu
130
1, 4
No
—
1
3