SAA7115HLBE NXP Semiconductors, SAA7115HLBE Datasheet - Page 346
SAA7115HLBE
Manufacturer Part Number
SAA7115HLBE
Description
Video ICs ADV DGTL VIDEO DECODR
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7115HLBE.pdf
(548 pages)
Specifications of SAA7115HLBE
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 70 C
Package / Case
SOT-407
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Number Of Channels
2
Resolution
8 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
SAA7115HL/V1,557 SAF7115HLBE
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Philips Semiconductors
Floating-point compare greater
SYNTAX
FUNCTION
DESCRIPTION
argument, rsrc2; otherwise, rdest is set to 0. The arguments are treated as IEEE single-precision floating-point values;
the result is an integer. If an argument is denormalized, zero is substituted for the argument before computing the
comparison, and the IFZ flag in the PCSW is set. If
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
occurs at the same time as rdest is 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
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 ] fgtr rsrc1 rsrc2 → rdest
if rguard then {
}
if (float)rsrc1 > (float)rsrc2 then
else
fgtr
fgtrflags
fgtr
rdest ← 1
rdest ← 0
Initial Values
operation sets the destination register, rdest, to 1 if the first argument, rsrc1, is greater than the second
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
operation computes the exception flags that would result from an individual
fgtr r30 r40 → r80
fgtr r30 r30 → r90
IF r10 fgtr r60 r30 → r100
IF r20 fgtr r60 r30 → r110
fgtr r30 r60 → r120
fgtr r30 r61 → r121
fgtr r50 r55 → r125
fgtr r60 r65 → r126
fgtr r50 r50 → r127
writepcsw
Operation
fgtr
causes an IEEE exception, the corresponding exception
PRELIMINARY SPECIFICATION
operation. The update of the PCSW exception flags
PNX1300/01/02/11 DSPCPU Operations
r80 ← 1
r90 ← 0
no change, since guard is false
r110 ← 0
r120 ← 1
r121 ← 0, INV flag set
r125 ← 1
r126 ← 1, IFZ flag set
r127 ← 0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
igtr fgtrflags fgeq
readpcsw writepcsw
ATTRIBUTES
SEE ALSO
Result
fgtr
.
fcomp
144
No
fgtr
—
2
1
3
A-48
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