PNX1311EH/G NXP Semiconductors, PNX1311EH/G Datasheet - Page 351
PNX1311EH/G
Manufacturer Part Number
PNX1311EH/G
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1311EHG.pdf
(548 pages)
Specifications of PNX1311EH/G
Lead Free Status / RoHS Status
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PNX1300/01/02/11 Data Book
flesflags
SYNTAX
FUNCTION
DESCRIPTION
arguments exchanged (
cannot be used in assembly source files.)
rsrc1<rsrc2 and stores a bit vector representing the exception flags into rdest. The argument values are in IEEE
single-precision floating-point format; the result is an integer bit vector. 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. If
an argument is denormalized, zero is substituted before computing the comparison, and the IFZ bit in the result is set.
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not changed.
EXAMPLES
A-53
r30 = 0x40400000 (3.0), r40 = 0 (0.0)
r30 = 0x40400000 (3.0)
r10 = 0, r60 = 0x3f800000 (1.0),
r30 = 0x40400000 (3.0)
r20 = 1, r60 = 0x3f800000 (1.0),
r30 = 0x40400000 (3.0)
r30 = 0x40400000 (3.0),
r60 = 0x3f800000 (1.0)
r30 = 0x40400000 (3.0),
r61 = 0xffffffff (QNaN)
r50 = 0x7f800000 (+INF)
r55 = 0xff800000 (-INF)
r60 = 0x3f800000 (1.0),
r65 = 0x00400000 (5.877471754e-39)
r50 = 0x7f800000 (+INF)
The
The
The
[ IF rguard ] flesflags rsrc1 rsrc2 → rdest
if rguard then
rdest ← ieee_flags((float)rsrc1 < (float)rsrc2)
flesflags
flesflags
flesflags
31
0
Initial Values
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
operation is a pseudo operation transformed by the scheduler into an
operation computes the IEEE exceptions that would result from computing the comparison
PRELIMINARY SPECIFICATION
flesflags
’s rsrc1 is
flesflags r30 r40 → r80
flesflags r30 r30 → r90
IF r10 flesflags r60 r30 → r100
IF r20 flesflags r60 r30 → r110
flesflags r30 r60 → r120
flesflags r30 r61 → r121
flesflags r50 r55 → r125
flesflags r60 r65 → r126
flesflags r50 r50 → r127
IEEE status flags from floating-point compare
fgtrflags
Operation
7
0
’s rsrc2 and vice versa). (Note: pseudo operations
OFZ
6
IFZ
5
INV
4
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r80 ← 0
r90 ← 0
no change, since guard is false
r110 ← 0
r120 ← 0
r121 ← 0x10 (INV)
r125 ← 0
r126 ← 0x20 (IFZ)
r127 ← 0
OVF
3
fles iles fleqflags
Philips Semiconductors
pseudo-op for fgtrflags
UNF
ATTRIBUTES
2
SEE ALSO
readpcsw
fgtrflags
Result
INX
1
less-than
DBZ
0
fcomp
with the
145
No
—
2
1
3
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