Norm, Normalize integer norm – Texas Instruments TMS320C67X/C67X+ DSP User Manual
Page 252
NORM
Normalize Integer
3-192
Instruction Set
SPRU733
Normalize Integer
NORM
Syntax
NORM (.unit) src2, dst
.unit = .L1 or .L2
Compatibility
C62x, C64x, C67x, and C67x+ CPU
Opcode
31
29
28
27
23
22
18
17
13
12
11
5
4
3
2
1
0
creg
z
dst
src2
0 0 0 0 0 x
op
1 1 0 s p
3
1
5
5
1
7
1
1
Opcode map field used...
For operand type...
Unit
Opfield
src2
dst
xsint
uint
.L1, .L2
110 0011
src2
dst
slong
uint
.L1, .L2
110 0000
Description
The number of redundant sign bits of src2 is placed in dst. Several examples
are shown in the following diagram.
1
1 1 1 1 1 1 1 1 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
x
0 1 x x x x x x
x x x x x x x x x x x x x x x
x
x
x x
x
x
x
x
In this case, NORM returns 3:
In this case, NORM returns 30:
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8
7 6
5 4
3
2 1 0
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8
7 6
5 4
3
2 1 0
In this case, NORM returns 0:
In this case, NORM returns 31:
x
0 0 0 0 1 x x x
x x x x x x x x x x x x x x x
x
x
x x
x
x
x
x
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8
7 6
5 4
3
2 1 0
1
1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8
7 6
5 4
3
2 1 0
src2
src2
src2
src2