tm1300 NXP Semiconductors, tm1300 Datasheet - Page 378
tm1300
Manufacturer Part Number
tm1300
Description
Tm-1300 Media Processor
Manufacturer
NXP Semiconductors
Datasheet
1.TM1300.pdf
(533 pages)
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TM1300 Data Book
ifloatflags
SYNTAX
FUNCTION
DESCRIPTION
r src1 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 r dest 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.
modification of the destination register. If the LSB of r guard is 1, r dest is written; otherwise, r dest is not changed.
EXAMPLES
A-92
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 r guard ] ifloatflags r src1
if r guard then
r dest
ifloatflags
ifloatflags
31
0
Initial Values
ieee_flags((float) ((long)r src1 ))
operation computes the IEEE exceptions that would result from converting the signed integer in
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
PRODUCT SPECIFICATION
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
r dest
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
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