PNX1300 Philips, PNX1300 Datasheet - Page 459

• Manufacturer Part Number: PNX1300
• Description: Media Processors
• Manufacturer: Philips

PNX1300/01/02/11 Data Book
sex8
SYNTAX
FUNCTION
DESCRIPTION
argument and r0 (always contains 0) as the second. (Note: pseudo operations cannot be used in assembly source
files.)
and writes the result in rdest.
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is not changed.
EXAMPLES
A-161
r30 = 0xffff0040
r10 = 0, r40 = 0xff0fff91
r20 = 1, r40 = 0xff0fff91
r50 = 0x00000091
The
As shown below, the
The
[ IF rguard ] sex8 rsrc1
if rguard then
rdest
sex8
sex8
Initial Values
sign_ext8to32(rsrc1<7:0>)
operation is a pseudo operation transformed by the scheduler into a
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
PRELIMINARY SPECIFICATION
sex8
operation sign extends the least-significant halfword of the argument, r src1, to 32 bits
rsrc1
rdest
sex8 r30
IF r10 sex8 r40
IF r20 sex8 r40
sex8 r50
31
31
S
S
S
rdest
S
S
S
S
S
23
23
S
S
S
S
r60
r110
Operation
S
S
S
S
15
15
S
S
r70
r100
S
S
S
S
S
S
S
S
7
7
signed
signed
r60
no change, since guard is false
r100
r110
0
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
ibytesel sex16 zex8 zex16
ibytesel
0x00000040
0xffffff91
0xffffff91
Philips Semiconductors
Sign extend 8 bits
pseudo-op for ibytesel
ATTRIBUTES
SEE ALSO
Result
with rsrc1 as the first
1, 2, 3, 4, 5
alu
No
56
—
1
1