PNX1300 Philips, PNX1300 Datasheet - Page 393
PNX1300
Manufacturer Part Number
PNX1300
Description
Media Processors
Manufacturer
Philips
Datasheet
1.PNX1300.pdf
(548 pages)
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PNX1300/01/02/11 Data Book
ifloatrzflags
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
A-95
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 ] ifloatrzflags rsrc1
if rguard then
rdest
ifloatrzflags
ifloatrzflags
31
0
Initial Values
ieee_flags((float) ((long)rsrc1))
PRELIMINARY SPECIFICATION
operation computes the IEEE exceptions that would result from converting the signed
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB
ifloatrzflags r30
ifloatrzflags r40
IF r10 ifloatrzflags r50
IF r20 ifloatrzflags r50
ifloatrzflags r60
ifloatrzflags r70
ifloatrzflags r80
IEEE status flags from convert signed integer to
rdest
floating-point with rounding toward zero
Operation
7
0
r100
r105
r117
r120
r122
OFZ
6
IFZ
5
r115
r110
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
ifloatrz ifloatflags
3
Philips Semiconductors
0
0
0
0x02 (INX)
0
0x02 (INX)
UNF
ATTRIBUTES
2
SEE ALSO
Result
INX
1
DBZ
0
falu
118
1, 4
No
—
1
3
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