tm1300 NXP Semiconductors, tm1300 Datasheet - Page 445

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

Philips Semiconductors
Sign extend 16 bits
SYNTAX
FUNCTION
DESCRIPTION
bits and stores the result in r dest .
modification of the destination register. If the LSB of the guard is 1, r dest is written; otherwise, r dest is not changed.
EXAMPLES
r30 = 0xffff0040
r10 = 0, r40 = 0xff0fff91
r20 = 1, r40 = 0xff0fff91
r50 = 0x00000091
As shown below, the
The
[ IF r guard ] sex16 r src1
if r guard then
r dest
sex16
Initial Values
sign_ext16to32(r src1 <15:0>)
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
sex16
operation sign extends the least-significant 16bit halfword of the argument, r src1 , to 32
r src1
r dest
sex16 r30
IF r10 sex16 r40
IF r20 sex16 r40
sex16 r50
S
3
3
S
S
S
r dest
S
S
S
S
S
S
S
S
Operation
S
r60
r110
S
S
S
S
S
1
1
PRODUCT SPECIFICATION
r70
r100
signed
signed
DSPCPU Operations for TM1300
r60
no change, since guard is false
r100
r110
0
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
0x00000040
0xffffff91
0x00000091
zex16 sex8 zex8
ATTRIBUTES
SEE ALSO
Result
sex16
1, 2, 3, 4, 5
alu
No
51
—
1
1
A-159