PNX1301EH NXP Semiconductors, PNX1301EH Datasheet - Page 473
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PNX1301EH
Manufacturer Part Number
PNX1301EH
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1301EH.pdf
(548 pages)
Specifications of PNX1301EH
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ufixieee
SYNTAX
FUNCTION
DESCRIPTION
and writes the result into rdest. Rounding is according to the IEEE rounding mode bits in PCSW. If rsrc1 is
denormalized, zero is substituted before conversion, and the IFZ flag in the PCSW is set. If
IEEE exception, such as overflow or underflow, the corresponding exception flags in the PCSW are set. The PCSW
exception flags are sticky: the flags can be set as a side-effect of any floating-point operation but can only be reset by
an explicit
written. If any other floating-point compute operations update the PCSW at the same time, the net result in each
exception flag is the logical OR of all simultaneous updates ORed with the existing PCSW value for that exception
flag.
modification of the destination register. If the LSB of rguard is 1, rdest and the exception flags in PCSW are written;
otherwise, rdest is not changed and the operation does not affect the exception flags in PCSW.
EXAMPLES
A-175
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
The
[ IF rguard ] ufixieee rsrc1 → rdest
if rguard then {
}
rdest ← (unsigned long) ((float)rsrc1)
ufixieeeflags
ufixieee
ufixieee
writepcsw
Initial Values
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
operation converts the single-precision IEEE floating-point value in rsrc1 to an unsigned integer
PRELIMINARY SPECIFICATION
operation. The update of the PCSW exception flags occurs at the same time as rdest is
operation computes the exception flags that would result from an individual
ufixieee r30 → r100
ufixieee r35 → r102
IF r10 ufixieee r40 → r105
IF r20 ufixieee r40 → r110
ufixieee r45 → r112
ufixieee r50 → r115
ufixieee r60 → r117
ufixieee r70 → r120
ufixieee r80 → r122
Convert floating-point to unsigned integer using
Operation
PCSW rounding mode
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r100 ← 3
r102 ← 3, INX flag set
no change, since guard is false
r110 ← 0x0, INV flag set
r112 ← 0xffffffff (2
r115 ← 0, INV flag set
r117 ← 0, IFZ set
r120 ← 0, INV flag set
r122 ← 0, INV flag set
ifixieee ifixrz ufixrz
Philips Semiconductors
ATTRIBUTES
SEE ALSO
ufixieee
Result
32
-1), INV flag set
ufixieee
causes an
123
1, 4
falu
No
—
1
3
.
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