tm1300 NXP Semiconductors, tm1300 Datasheet - Page 380

• Manufacturer Part Number: tm1300
• Description: Tm-1300 Media Processor
• Manufacturer: NXP Semiconductors

TM1300 Data Book
ifloatrzflags
SYNTAX
FUNCTION
DESCRIPTION
in 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 performed toward zero; the IEEE
rounding mode bits in PCSW are ignored.
the 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-94
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 ] ifloatrzflags r src1
if r guard then
r dest
ifloatrzflags
ifloatrzflags
31
0
Initial Values
ieee_flags((float) ((long)r src1 ))
operation computes the IEEE exceptions that would result from converting the signed integer
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls
PRODUCT SPECIFICATION
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
r dest
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